lib_test.js

var Lib = require('@src/lib');
var setCursor = require('@src/lib/setcursor');

var d3 = require('d3');
var Plotly = require('@lib');
var PlotlyInternal = require('@src/plotly');
var createGraphDiv = require('../assets/create_graph_div');
var destroyGraphDiv = require('../assets/destroy_graph_div');
var Plots = PlotlyInternal.Plots;


describe('Test lib.js:', function() {
    'use strict';

    describe('parseDate() should', function() {
        it('return false on bad (number) input:', function() {
            expect(Lib.parseDate(0)).toBe(false);
        });
        it('return false on bad (string) input:', function() {
            expect(Lib.parseDate('toto')).toBe(false);
        });
        it('work with yyyy-mm-dd string input:', function() {
            var input = '2014-12-01',
                res = Lib.parseDate(input),
                res0 = new Date(2014, 11, 1);
            expect(res.getTime()).toEqual(res0.getTime());
        });
        it('work with mm/dd/yyyy string input:', function() {
            var input = '12/01/2014',
                res = Lib.parseDate(input),
                res0 = new Date(2014, 11, 1);
            expect(res.getTime()).toEqual(res0.getTime());
        });
        it('work with yyyy-mm-dd HH:MM:SS.sss string input:', function() {
            var input = '2014-12-01 09:50:05.124',
                res = Lib.parseDate(input),
                res0 = new Date(2014, 11, 1, 9, 50, 5, 124);
            expect(res.getTime()).toEqual(res0.getTime());
        });
        it('work with mm/dd/yyyy HH:MM:SS string input:', function() {
            var input = '2014-12-01 09:50:05',
                res = Lib.parseDate(input),
                res0 = new Date(2014, 11, 1, 9, 50, 5);
            expect(res.getTime()).toEqual(res0.getTime());
        });
    });

    describe('interp() should', function() {
        it('return 1.75 as Q1 of [1, 2, 3, 4, 5]:', function() {
            var input = [1, 2, 3, 4, 5],
                res = Lib.interp(input, 0.25),
                res0 = 1.75;
            expect(res).toEqual(res0);
        });
        it('return 4.25 as Q3 of [1, 2, 3, 4, 5]:', function() {
            var input = [1, 2, 3, 4, 5],
                res = Lib.interp(input, 0.75),
                res0 = 4.25;
            expect(res).toEqual(res0);
        });
        it('error if second input argument is a string:', function() {
            var input = [1, 2, 3, 4, 5];
            expect(function() {
                Lib.interp(input, 'apple');
            }).toThrow('n should be a finite number');
        });
        it('error if second input argument is a date:', function() {
            var in1 = [1, 2, 3, 4, 5],
                in2 = new Date(2014, 11, 1);
            expect(function() {
                Lib.interp(in1, in2);
            }).toThrow('n should be a finite number');
        });
        it('return the right boundary on input [-Inf, Inf]:', function() {
            var input = [-Infinity, Infinity],
                res = Lib.interp(input, 1),
                res0 = Infinity;
            expect(res).toEqual(res0);
        });
    });

    describe('transposeRagged()', function() {
        it('should transpose and return a rectangular array', function() {
            var input = [
                    [1],
                    [2, 3, 4],
                    [5, 6],
                    [7]],
                output = [
                    [1, 2, 5, 7],
                    [undefined, 3, 6, undefined],
                    [undefined, 4, undefined, undefined]
                ];

            expect(Lib.transposeRagged(input)).toEqual(output);
        });
    });

    describe('dot()', function() {
        var dot = Lib.dot;

        it('should return null for empty or unequal-length inputs', function() {
            expect(dot([], [])).toBeNull();
            expect(dot([1], [2, 3])).toBeNull();
        });

        it('should dot vectors to a scalar', function() {
            expect(dot([1, 2, 3], [4, 5, 6])).toEqual(32);
        });

        it('should dot a vector and a matrix to a vector', function() {
            expect(dot([1, 2], [[3, 4], [5, 6]])).toEqual([13, 16]);
            expect(dot([[3, 4], [5, 6]], [1, 2])).toEqual([11, 17]);
        });

        it('should dot two matrices to a matrix', function() {
            expect(dot([[1, 2], [3, 4]], [[5, 6], [7, 8]]))
                .toEqual([[19, 22], [43, 50]]);
        });
    });

    describe('aggNums()', function() {
        var aggNums = Lib.aggNums;

        function summation(a, b) { return a + b; }

        it('should work with 1D and 2D inputs and ignore non-numerics', function() {
            var in1D = [1, 2, 3, 4, 'goose!', 5, 6],
                in2D = [[1, 2, 3], ['', 4], [5, 'hi!', 6]];

            expect(aggNums(Math.min, null, in1D)).toEqual(1);
            expect(aggNums(Math.min, null, in2D)).toEqual(1);

            expect(aggNums(Math.max, null, in1D)).toEqual(6);
            expect(aggNums(Math.max, null, in2D)).toEqual(6);

            expect(aggNums(summation, 0, in1D)).toEqual(21);
            expect(aggNums(summation, 0, in2D)).toEqual(21);
        });
    });

    describe('mean() should', function() {
        it('toss out non-numerics (strings):', function() {
            var input = [1, 2, 'apple', 'orange'],
                res = Lib.mean(input);
            expect(res).toEqual(1.5);
        });
        it('toss out non-numerics (NaN):', function() {
            var input = [1, 2, NaN],
                res = Lib.mean(input);
            expect(res).toEqual(1.5);
        });
        it('evaluate numbers which are passed around as text strings:', function() {
            var input = ['1', '2'],
                res = Lib.mean(input);
            expect(res).toEqual(1.5);
        });
    });

    describe('variance() should', function() {
        it('return 0 on input [2, 2, 2, 2, 2]:', function() {
            var input = [2, 2, 2, 2],
                res = Lib.variance(input);
            expect(res).toEqual(0);
        });
        it('return 2/3 on input [-1, 0, 1]:', function() {
            var input = [-1, 0, 1],
                res = Lib.variance(input);
            expect(res).toEqual(2 / 3);
        });
        it('toss out non-numerics (strings):', function() {
            var input = [1, 2, 'apple', 'orange'],
                res = Lib.variance(input);
            expect(res).toEqual(0.25);
        });
        it('toss out non-numerics (NaN):', function() {
            var input = [1, 2, NaN],
                res = Lib.variance(input);
            expect(res).toEqual(0.25);
        });
    });

    describe('stdev() should', function() {
        it('return 0 on input [2, 2, 2, 2, 2]:', function() {
            var input = [2, 2, 2, 2],
                res = Lib.stdev(input);
            expect(res).toEqual(0);
        });
        it('return sqrt(2/3) on input [-1, 0, 1]:', function() {
            var input = [-1, 0, 1],
                res = Lib.stdev(input);
            expect(res).toEqual(Math.sqrt(2 / 3));
        });
        it('toss out non-numerics (strings):', function() {
            var input = [1, 2, 'apple', 'orange'],
                res = Lib.stdev(input);
            expect(res).toEqual(0.5);
        });
        it('toss out non-numerics (NaN):', function() {
            var input = [1, 2, NaN],
                res = Lib.stdev(input);
            expect(res).toEqual(0.5);
        });
    });

    describe('smooth()', function() {
        it('should not alter the input for FWHM < 1.5', function() {
            var input = [1, 2, 1, 2, 1],
                output = Lib.smooth(input.slice(), 1.49);

            expect(output).toEqual(input);

            output = Lib.smooth(input.slice(), 'like butter');

            expect(output).toEqual(input);
        });

        it('should preserve the length and integral even with multiple bounces', function() {
            var input = [1, 2, 4, 8, 16, 8, 10, 12],
                output2 = Lib.smooth(input.slice(), 2),
                output30 = Lib.smooth(input.slice(), 30),
                sumIn = 0,
                sum2 = 0,
                sum30 = 0;

            for(var i = 0; i < input.length; i++) {
                sumIn += input[i];
                sum2 += output2[i];
                sum30 += output30[i];
            }

            expect(output2.length).toEqual(input.length);
            expect(output30.length).toEqual(input.length);
            expect(sum2).toBeCloseTo(sumIn, 6);
            expect(sum30).toBeCloseTo(sumIn, 6);
        });

        it('should use a hann window and bounce', function() {
            var input = [0, 0, 0, 7, 0, 0, 0],
                out4 = Lib.smooth(input, 4),
                out7 = Lib.smooth(input, 7),
                expected4 = [
                    0.2562815664617711, 0.875, 1.4937184335382292, 1.75,
                    1.493718433538229, 0.875, 0.25628156646177086
                ],
                expected7 = [1, 1, 1, 1, 1, 1, 1],
                i;

            for(i = 0; i < input.length; i++) {
                expect(out4[i]).toBeCloseTo(expected4[i], 6);
                expect(out7[i]).toBeCloseTo(expected7[i], 6);
            }
        });
    });

    describe('nestedProperty', function() {
        var np = Lib.nestedProperty;

        it('should access simple objects', function() {
            var obj = {a: 'b', c: 'd'},
                propA = np(obj, 'a'),
                propB = np(obj, 'b');

            expect(propA.get()).toBe('b');
            // making and reading nestedProperties shouldn't change anything
            expect(obj).toEqual({a: 'b', c: 'd'});
            // only setting them should
            propA.set('cats');
            expect(obj).toEqual({a: 'cats', c: 'd'});
            expect(propA.get()).toBe('cats');
            propA.set('b');

            expect(propB.get()).toBe(undefined);
            expect(obj).toEqual({a: 'b', c: 'd'});
            propB.set({cats: true, dogs: false});
            expect(obj).toEqual({a: 'b', c: 'd', b: {cats: true, dogs: false}});
        });

        it('should access arrays', function() {
            var arr = [1, 2, 3],
                prop1 = np(arr, 1),
                prop5 = np(arr, '5');

            expect(prop1.get()).toBe(2);
            expect(arr).toEqual([1, 2, 3]);

            prop1.set('cats');
            expect(prop1.get()).toBe('cats');

            prop1.set(2);
            expect(prop5.get()).toBe(undefined);
            expect(arr).toEqual([1, 2, 3]);

            prop5.set(5);
            var localArr = [1, 2, 3];
            localArr[5] = 5;
            expect(arr).toEqual(localArr);

            prop5.set(null);
            expect(arr).toEqual([1, 2, 3]);
            expect(arr.length).toBe(3);
        });

        it('should not access whole array elements with index -1', function() {
            // for a lot of cases we could make this work,
            // but deleting the value is a mess, and anyway
            // we don't need this, it's better just to set the whole
            // array, ie np(obj, 'arr')
            var obj = {arr: [1, 2, 3]};
            expect(function() { np(obj, 'arr[-1]'); }).toThrow('bad property string');
        });

        it('should access properties of objects in an array with index -1', function() {
            var obj = {arr: [{a: 1}, {a: 2}, {b: 3}]},
                prop = np(obj, 'arr[-1].a');

            expect(prop.get()).toEqual([1, 2, undefined]);
            expect(obj).toEqual({arr: [{a: 1}, {a: 2}, {b: 3}]});

            prop.set(5);
            expect(prop.get()).toBe(5);
            expect(obj).toEqual({arr: [{a: 5}, {a: 5}, {a: 5, b: 3}]});

            prop.set(null);
            expect(prop.get()).toBe(undefined);
            expect(obj).toEqual({arr: [undefined, undefined, {b: 3}]});

            prop.set([2, 3, 4]);
            expect(prop.get()).toEqual([2, 3, 4]);
            expect(obj).toEqual({arr: [{a: 2}, {a: 3}, {a: 4, b: 3}]});

            prop.set([6, 7, undefined]);
            expect(prop.get()).toEqual([6, 7, undefined]);
            expect(obj).toEqual({arr: [{a: 6}, {a: 7}, {b: 3}]});

            // too short an array: wrap around
            prop.set([9, 10]);
            expect(prop.get()).toEqual([9, 10, 9]);
            expect(obj).toEqual({arr: [{a: 9}, {a: 10}, {a: 9, b: 3}]});

            // too long an array: ignore extras
            prop.set([11, 12, 13, 14]);
            expect(prop.get()).toEqual([11, 12, 13]);
            expect(obj).toEqual({arr: [{a: 11}, {a: 12}, {a: 13, b: 3}]});
        });

        it('should remove a property only with undefined or null', function() {
            var obj = {a: 'b', c: 'd'},
                propA = np(obj, 'a'),
                propC = np(obj, 'c');

            propA.set(null);
            propC.set(undefined);
            expect(obj).toEqual({});

            propA.set(false);
            np(obj, 'b').set('');
            propC.set(0);
            np(obj, 'd').set(NaN);
            expect(obj).toEqual({a: false, b: '', c: 0, d: NaN});
        });

        it('should remove containers but not data arrays', function() {
            var obj = {
                    annotations: [{a: [1, 2, 3]}],
                    c: [1, 2, 3],
                    domain: [1, 2],
                    range: [2, 3],
                    shapes: ['elephant']
                },
                propA = np(obj, 'annotations[-1].a'),
                propC = np(obj, 'c'),
                propD0 = np(obj, 'domain[0]'),
                propD1 = np(obj, 'domain[1]'),
                propR = np(obj, 'range'),
                propS = np(obj, 'shapes[0]');

            propA.set([]);
            propC.set([]);
            propD0.set(undefined);
            propD1.set(undefined);
            propR.set([]);
            propS.set(null);

            expect(obj).toEqual({c: []});
        });


        it('should have no empty object sub-containers but contain empty data arrays', function() {
            var obj = {},
                prop = np(obj, 'a[1].b.c'),
                expectedArr = [];

            expectedArr[1] = {b: {c: 'pizza'}};

            expect(prop.get()).toBe(undefined);
            expect(obj).toEqual({});

            prop.set('pizza');
            expect(obj).toEqual({a: expectedArr});
            expect(prop.get()).toBe('pizza');

            prop.set(null);
            expect(prop.get()).toBe(undefined);
            expect(obj).toEqual({a: []});
        });

        it('should get empty, and fail on set, with a bad input object', function() {
            var badProps = [
                np(5, 'a'),
                np(undefined, 'a'),
                np('cats', 'a'),
                np(true, 'a')
            ];

            function badSetter(i) {
                return function() {
                    badProps[i].set('cats');
                };
            }

            for(var i = 0; i < badProps.length; i++) {
                expect(badProps[i].get()).toBe(undefined);
                expect(badSetter(i)).toThrow('bad container');
            }
        });

        it('should fail on a bad property string', function() {
            var badStr = [
                [], {}, false, undefined, null, NaN, Infinity
            ];

            function badProp(i) {
                return function() {
                    np({}, badStr[i]);
                };
            }

            for(var i = 0; i < badStr.length; i++) {
                expect(badProp(i)).toThrow('bad property string');
            }
        });
    });

    describe('objectFromPath', function() {

        it('should return an object', function() {
            var obj = Lib.objectFromPath('test', 'object');

            expect(obj).toEqual({ test: 'object' });
        });

        it('should work for deep objects', function() {
            var obj = Lib.objectFromPath('deep.nested.test', 'object');

            expect(obj).toEqual({ deep: { nested: { test: 'object' }}});
        });

        it('should work for arrays', function() {
            var obj = Lib.objectFromPath('nested[2].array', 'object');

            expect(Object.keys(obj)).toEqual(['nested']);
            expect(Array.isArray(obj.nested)).toBe(true);
            expect(obj.nested[0]).toBe(undefined);
            expect(obj.nested[2]).toEqual({ array: 'object' });
        });

        it('should work for any given value', function() {
            var obj = Lib.objectFromPath('test.type', { an: 'object' });

            expect(obj).toEqual({ test: { type: { an: 'object' }}});

            obj = Lib.objectFromPath('test.type', [42]);

            expect(obj).toEqual({ test: { type: [42] }});
        });
    });

    describe('expandObjectPaths', function() {
        it('returns the original object', function() {
            var x = {};
            expect(Lib.expandObjectPaths(x)).toBe(x);
        });

        it('unpacks top-level paths', function() {
            var input = {'marker.color': 'red', 'marker.size': [1, 2, 3]};
            var expected = {marker: {color: 'red', size: [1, 2, 3]}};
            expect(Lib.expandObjectPaths(input)).toEqual(expected);
        });

        it('unpacks recursively', function() {
            var input = {'marker.color': {'red.certainty': 'definitely'}};
            var expected = {marker: {color: {red: {certainty: 'definitely'}}}};
            expect(Lib.expandObjectPaths(input)).toEqual(expected);
        });

        it('unpacks deep paths', function() {
            var input = {'foo.bar.baz': 'red'};
            var expected = {foo: {bar: {baz: 'red'}}};
            expect(Lib.expandObjectPaths(input)).toEqual(expected);
        });

        it('unpacks non-top-level deep paths', function() {
            var input = {color: {'foo.bar.baz': 'red'}};
            var expected = {color: {foo: {bar: {baz: 'red'}}}};
            expect(Lib.expandObjectPaths(input)).toEqual(expected);
        });

        it('merges dotted properties into objects', function() {
            var input = {marker: {color: 'red'}, 'marker.size': 8};
            var expected = {marker: {color: 'red', size: 8}};
            expect(Lib.expandObjectPaths(input)).toEqual(expected);
        });

        it('merges objects into dotted properties', function() {
            var input = {'marker.size': 8, marker: {color: 'red'}};
            var expected = {marker: {color: 'red', size: 8}};
            expect(Lib.expandObjectPaths(input)).toEqual(expected);
        });

        it('retains the identity of nested objects', function() {
            var input = {marker: {size: 8}};
            var origNested = input.marker;
            var expanded = Lib.expandObjectPaths(input);
            var newNested = expanded.marker;

            expect(input).toBe(expanded);
            expect(origNested).toBe(newNested);
        });

        it('retains the identity of nested arrays', function() {
            var input = {'marker.size': [1, 2, 3]};
            var origArray = input['marker.size'];
            var expanded = Lib.expandObjectPaths(input);
            var newArray = expanded.marker.size;

            expect(input).toBe(expanded);
            expect(origArray).toBe(newArray);
        });

        it('expands bracketed array notation', function() {
            var input = {'marker[1]': {color: 'red'}};
            var expected = {marker: [undefined, {color: 'red'}]};
            expect(Lib.expandObjectPaths(input)).toEqual(expected);
        });

        it('expands nested arrays', function() {
            var input = {'marker[1].range[1]': 5};
            var expected = {marker: [undefined, {range: [undefined, 5]}]};
            var computed = Lib.expandObjectPaths(input);
            expect(computed).toEqual(expected);
        });

        it('expands bracketed array with more nested attributes', function() {
            var input = {'marker[1]': {'color.alpha': 2}};
            var expected = {marker: [undefined, {color: {alpha: 2}}]};
            var computed = Lib.expandObjectPaths(input);
            expect(computed).toEqual(expected);
        });

        it('expands bracketed array notation without further nesting', function() {
            var input = {'marker[1]': 8};
            var expected = {marker: [undefined, 8]};
            var computed = Lib.expandObjectPaths(input);
            expect(computed).toEqual(expected);
        });

        it('expands bracketed array notation with further nesting', function() {
            var input = {'marker[1].size': 8};
            var expected = {marker: [undefined, {size: 8}]};
            var computed = Lib.expandObjectPaths(input);
            expect(computed).toEqual(expected);
        });

        it('expands bracketed array notation with further nesting', function() {
            var input = {'marker[1].size.magnitude': 8};
            var expected = {marker: [undefined, {size: {magnitude: 8}}]};
            var computed = Lib.expandObjectPaths(input);
            expect(computed).toEqual(expected);
        });

        it('combines changes with single array nesting', function() {
            var input = {'marker[1].foo': 5, 'marker[0].foo': 4};
            var expected = {marker: [{foo: 4}, {foo: 5}]};
            var computed = Lib.expandObjectPaths(input);
            expect(computed).toEqual(expected);
        });

        // TODO: This test is unimplemented since it's a currently-unused corner case.
        // Getting the test to pass requires some extension (pun?) to extendDeepNoArrays
        // that's intelligent enough to only selectively merge *some* arrays, in particular
        // not data arrays but yes on arrays that were previously expanded. This is a bit
        // tricky to get to work just right and currently doesn't have any known use since
        // container arrays are not multiply nested.
        /*
        it('combines changes', function() {
            var input = {'marker[1].range[1]': 5, 'marker[1].range[0]': 4};
            var expected = {marker: [undefined, {range: [4, 5]}]};
            var computed = Lib.expandObjectPaths(input);
            expect(computed).toEqual(expected);
        });
        */
    });

    describe('coerce', function() {
        var coerce = Lib.coerce,
            out;

        // TODO: I tested font and string because I changed them, but all the other types need tests still

        it('should set a value and return the value it sets', function() {
            var aVal = 'aaaaah!',
                cVal = {1: 2, 3: 4},
                attrs = {a: {valType: 'any', dflt: aVal}, b: {c: {valType: 'any'}}},
                obj = {b: {c: cVal}},
                outObj = {},

                aOut = coerce(obj, outObj, attrs, 'a'),
                cOut = coerce(obj, outObj, attrs, 'b.c');

            expect(aOut).toBe(aVal);
            expect(aOut).toBe(outObj.a);
            expect(cOut).toBe(cVal);
            expect(cOut).toBe(outObj.b.c);
        });

        describe('string valType', function() {
            var dflt = 'Jabberwock',
                stringAttrs = {
                    s: {valType: 'string', dflt: dflt},
                    noBlank: {valType: 'string', dflt: dflt, noBlank: true}
                };

            it('should insert the default if input is missing, or blank with noBlank', function() {
                out = coerce(undefined, {}, stringAttrs, 's');
                expect(out).toEqual(dflt);

                out = coerce({}, {}, stringAttrs, 's');
                expect(out).toEqual(dflt);

                out = coerce({s: ''}, {}, stringAttrs, 's');
                expect(out).toEqual('');

                out = coerce({noBlank: ''}, {}, stringAttrs, 'noBlank');
                expect(out).toEqual(dflt);
            });

            it('should always return a string for any input', function() {
                expect(coerce({s: 'a string!!'}, {}, stringAttrs, 's'))
                    .toEqual('a string!!');

                expect(coerce({s: 42}, {}, stringAttrs, 's'))
                    .toEqual('42');

                expect(coerce({s: [1, 2, 3]}, {}, stringAttrs, 's'))
                    .toEqual(dflt);

                expect(coerce({s: true}, {}, stringAttrs, 's'))
                    .toEqual(dflt);

                expect(coerce({s: {1: 2}}, {}, stringAttrs, 's'))
                    .toEqual(dflt);
            });
        });

        describe('coerce2', function() {
            var coerce2 = Lib.coerce2;

            it('should set a value and return the value it sets when user input is valid', function() {
                var colVal = 'red',
                    sizeVal = 14,
                    attrs = {testMarker: {testColor: {valType: 'color', dflt: 'rgba(0, 0, 0, 0)'},
                                          testSize: {valType: 'number', dflt: 20}}},
                    obj = {testMarker: {testColor: colVal, testSize: sizeVal}},
                    outObj = {},
                    colOut = coerce2(obj, outObj, attrs, 'testMarker.testColor'),
                    sizeOut = coerce2(obj, outObj, attrs, 'testMarker.testSize');

                expect(colOut).toBe(colVal);
                expect(colOut).toBe(outObj.testMarker.testColor);
                expect(sizeOut).toBe(sizeVal);
                expect(sizeOut).toBe(outObj.testMarker.testSize);
            });

            it('should set and return the default if the user input is not valid', function() {
                var colVal = 'r',
                    sizeVal = 'aaaaah!',
                    attrs = {testMarker: {testColor: {valType: 'color', dflt: 'rgba(0, 0, 0, 0)'},
                                          testSize: {valType: 'number', dflt: 20}}},
                    obj = {testMarker: {testColor: colVal, testSize: sizeVal}},
                    outObj = {},
                    colOut = coerce2(obj, outObj, attrs, 'testMarker.testColor'),
                    sizeOut = coerce2(obj, outObj, attrs, 'testMarker.testSize');

                expect(colOut).toBe('rgba(0, 0, 0, 0)');
                expect(sizeOut).toBe(outObj.testMarker.testSize);
                expect(sizeOut).toBe(20);
                expect(sizeOut).toBe(outObj.testMarker.testSize);
            });

            it('should return false if there is no user input', function() {
                var colVal = null,
                    sizeVal = null,
                    attrs = {testMarker: {testColor: {valType: 'color', dflt: 'rgba(0, 0, 0, 0)'},
                                          testSize: {valType: 'number', dflt: 20}}},
                    obj = {testMarker: {testColor: colVal, testSize: sizeVal}},
                    outObj = {},
                    colOut = coerce2(obj, outObj, attrs, 'testMarker.testColor'),
                    sizeOut = coerce2(obj, outObj, attrs, 'testMarker.testSize');

                expect(colOut).toBe(false);
                expect(sizeOut).toBe(false);
            });
        });

        describe('info_array valType', function() {
            var infoArrayAttrs = {
                range: {
                    valType: 'info_array',
                    items: [
                        { valType: 'number' },
                        { valType: 'number' }
                    ]
                },
                domain: {
                    valType: 'info_array',
                    items: [
                        { valType: 'number', min: 0, max: 1 },
                        { valType: 'number', min: 0, max: 1 }
                    ],
                    dflt: [0, 1]
                }
            };

            it('should insert the default if input is missing', function() {
                expect(coerce(undefined, {}, infoArrayAttrs, 'domain'))
                    .toEqual([0, 1]);
                expect(coerce(undefined, {}, infoArrayAttrs, 'domain', [0, 0.5]))
                    .toEqual([0, 0.5]);
            });

            it('should dive into the items and coerce accordingly', function() {
                expect(coerce({range: ['-10', 100]}, {}, infoArrayAttrs, 'range'))
                    .toEqual([-10, 100]);

                expect(coerce({domain: [0, 0.5]}, {}, infoArrayAttrs, 'domain'))
                    .toEqual([0, 0.5]);

                expect(coerce({domain: [-5, 0.5]}, {}, infoArrayAttrs, 'domain'))
                    .toEqual([0, 0.5]);

                expect(coerce({domain: [0.5, 4.5]}, {}, infoArrayAttrs, 'domain'))
                    .toEqual([0.5, 1]);
            });

            it('should coerce unexpected input as best as it can', function() {
                expect(coerce({range: [12]}, {}, infoArrayAttrs, 'range'))
                    .toEqual([12]);

                expect(coerce({range: [12]}, {}, infoArrayAttrs, 'range', [-1, 20]))
                    .toEqual([12, 20]);

                expect(coerce({domain: [0.5]}, {}, infoArrayAttrs, 'domain'))
                    .toEqual([0.5, 1]);

                expect(coerce({range: ['-10', 100, 12]}, {}, infoArrayAttrs, 'range'))
                    .toEqual([-10, 100]);

                expect(coerce({domain: [0, 0.5, 1]}, {}, infoArrayAttrs, 'domain'))
                    .toEqual([0, 0.5]);
            });
        });

        describe('subplotid valtype', function() {
            var dflt = 'slice';
            var idAttrs = {
                pizza: {
                    valType: 'subplotid',
                    dflt: dflt
                }
            };

            var goodVals = ['slice', 'slice2', 'slice1492'];

            goodVals.forEach(function(goodVal) {
                it('should allow "' + goodVal + '"', function() {
                    expect(coerce({pizza: goodVal}, {}, idAttrs, 'pizza'))
                        .toEqual(goodVal);
                });
            });

            var badVals = [
                'slice0',
                'slice1',
                'Slice2',
                '2slice',
                '2',
                2,
                'slice2 ',
                'slice2.0',
                ' slice2',
                'slice 2',
                'slice01'
            ];

            badVals.forEach(function(badVal) {
                it('should not allow "' + badVal + '"', function() {
                    expect(coerce({pizza: badVal}, {}, idAttrs, 'pizza'))
                        .toEqual(dflt);
                });
            });
        });
    });

    describe('coerceFont', function() {
        var fontAttrs = Plots.fontAttrs,
            extendFlat = Lib.extendFlat,
            coerceFont = Lib.coerceFont;

        var defaultFont = {
            family: '"Open sans", verdana, arial, sans-serif, DEFAULT',
            size: 314159,
            color: 'neon pink with sparkles'
        };

        var attributes = {
            fontWithDefault: {
                family: extendFlat({}, fontAttrs.family, {dflt: defaultFont.family}),
                size: extendFlat({}, fontAttrs.size, {dflt: defaultFont.size}),
                color: extendFlat({}, fontAttrs.color, {dflt: defaultFont.color})
            },
            fontNoDefault: fontAttrs
        };

        var containerIn;

        function coerce(attr, dflt) {
            return Lib.coerce(containerIn, {}, attributes, attr, dflt);
        }

        it('should insert the full default if no or empty input', function() {
            containerIn = undefined;
            expect(coerceFont(coerce, 'fontWithDefault'))
                .toEqual(defaultFont);

            containerIn = {};
            expect(coerceFont(coerce, 'fontNoDefault', defaultFont))
                .toEqual(defaultFont);

            containerIn = {fontWithDefault: {}};
            expect(coerceFont(coerce, 'fontWithDefault'))
                .toEqual(defaultFont);
        });

        it('should fill in defaults for bad inputs', function() {
            containerIn = {
                fontWithDefault: {family: '', size: 'a million', color: 42}
            };
            expect(coerceFont(coerce, 'fontWithDefault'))
                .toEqual(defaultFont);
        });

        it('should pass through individual valid pieces', function() {
            var goodFamily = 'A fish', // for now any non-blank string is OK
                badFamily = 42,
                goodSize = 123.456,
                badSize = 'ginormous',
                goodColor = 'red',
                badColor = 'a dark and stormy night';

            containerIn = {
                fontWithDefault: {family: goodFamily, size: badSize, color: badColor}
            };
            expect(coerceFont(coerce, 'fontWithDefault'))
                .toEqual({family: goodFamily, size: defaultFont.size, color: defaultFont.color});

            containerIn = {
                fontWithDefault: {family: badFamily, size: goodSize, color: badColor}
            };
            expect(coerceFont(coerce, 'fontWithDefault'))
                .toEqual({family: defaultFont.family, size: goodSize, color: defaultFont.color});

            containerIn = {
                fontWithDefault: {family: badFamily, size: badSize, color: goodColor}
            };
            expect(coerceFont(coerce, 'fontWithDefault'))
                .toEqual({family: defaultFont.family, size: defaultFont.size, color: goodColor});
        });
    });

    describe('init2dArray', function() {
        it('should initialize a 2d array with the correct dimenstions', function() {
            var array = Lib.init2dArray(4, 5);
            expect(array.length).toEqual(4);
            expect(array[0].length).toEqual(5);
            expect(array[3].length).toEqual(5);
        });
    });

    describe('validate', function() {

        function assert(shouldPass, shouldFail, valObject) {
            shouldPass.forEach(function(v) {
                var res = Lib.validate(v, valObject);
                expect(res).toBe(true, JSON.stringify(v) + ' should pass');
            });

            shouldFail.forEach(function(v) {
                var res = Lib.validate(v, valObject);
                expect(res).toBe(false, JSON.stringify(v) + ' should fail');
            });
        }

        it('should work for valType \'data_array\' where', function() {
            var shouldPass = [[20], []],
                shouldFail = ['a', {}, 20, undefined, null];

            assert(shouldPass, shouldFail, {
                valType: 'data_array'
            });

            assert(shouldPass, shouldFail, {
                valType: 'data_array',
                dflt: [1, 2]
            });
        });

        it('should work for valType \'enumerated\' where', function() {
            assert(['a', 'b'], ['c', 1, null, undefined, ''], {
                valType: 'enumerated',
                values: ['a', 'b'],
                dflt: 'a'
            });

            assert([1, '1', 2, '2'], ['c', 3, null, undefined, ''], {
                valType: 'enumerated',
                values: [1, 2],
                coerceNumber: true,
                dflt: 1
            });

            assert(['a', 'b', [1, 2]], ['c', 1, null, undefined, ''], {
                valType: 'enumerated',
                values: ['a', 'b'],
                arrayOk: true,
                dflt: 'a'
            });
        });

        it('should work for valType \'boolean\' where', function() {
            var shouldPass = [true, false],
                shouldFail = ['a', 1, {}, [], null, undefined, ''];

            assert(shouldPass, shouldFail, {
                valType: 'boolean',
                dflt: true
            });

            assert(shouldPass, shouldFail, {
                valType: 'boolean',
                dflt: false
            });
        });

        it('should work for valType \'number\' where', function() {
            var shouldPass = [20, '20', 1e6],
                shouldFail = ['a', [], {}, null, undefined, ''];

            assert(shouldPass, shouldFail, {
                valType: 'number'
            });

            assert(shouldPass, shouldFail, {
                valType: 'number',
                dflt: null
            });

            assert([20, '20'], [-10, '-10', 25, '25'], {
                valType: 'number',
                dflt: 20,
                min: 0,
                max: 21
            });

            assert([20, '20', [1, 2]], ['a', {}], {
                valType: 'number',
                dflt: 20,
                arrayOk: true
            });
        });

        it('should work for valType \'integer\' where', function() {
            assert([1, 2, '3', '4'], ['a', 1.321321, {}, [], null, 2 / 3, undefined, null], {
                valType: 'integer',
                dflt: 1
            });

            assert([1, 2, '3', '4'], [-1, '-2', 2.121, null, undefined, [], {}], {
                valType: 'integer',
                min: 0,
                dflt: 1
            });
        });

        it('should work for valType \'string\' where', function() {
            var date = new Date(2016, 1, 1);

            assert(['3', '4', 'a', 3, 1.2113, ''], [undefined, {}, [], null, date, false], {
                valType: 'string',
                dflt: 'a'
            });

            assert(['3', '4', 'a', 3, 1.2113], ['', undefined, {}, [], null, date, true], {
                valType: 'string',
                dflt: 'a',
                noBlank: true
            });

            assert(['3', '4', ''], [undefined, 1, {}, [], null, date, true, false], {
                valType: 'string',
                dflt: 'a',
                strict: true
            });

            assert(['3', '4'], [undefined, 1, {}, [], null, date, '', true, false], {
                valType: 'string',
                dflt: 'a',
                strict: true,
                noBlank: true
            });
        });

        it('should work for valType \'color\' where', function() {
            var shouldPass = ['red', '#d3d3d3', 'rgba(0,255,255,0.1)'],
                shouldFail = [1, {}, [], 'rgq(233,122,332,1)', null, undefined];

            assert(shouldPass, shouldFail, {
                valType: 'color'
            });
        });

        it('should work for valType \'colorscale\' where', function() {
            var good = [ [0, 'red'], [1, 'blue'] ],
                bad = [ [0.1, 'red'], [1, 'blue'] ],
                bad2 = [ [0], [1] ],
                bad3 = [ ['red'], ['blue']],
                bad4 = ['red', 'blue'];

            var shouldPass = ['Viridis', 'Greens', good],
                shouldFail = ['red', 1, undefined, null, {}, [], bad, bad2, bad3, bad4];

            assert(shouldPass, shouldFail, {
                valType: 'colorscale'
            });
        });

        it('should work for valType \'angle\' where', function() {
            var shouldPass = ['auto', '120', 270],
                shouldFail = [{}, [], 'red', null, undefined, ''];

            assert(shouldPass, shouldFail, {
                valType: 'angle',
                dflt: 0
            });
        });

        it('should work for valType \'subplotid\' where', function() {
            var shouldPass = ['sp', 'sp4', 'sp10'],
                shouldFail = [{}, [], 'sp1', 'sp0', 'spee1', null, undefined, true];

            assert(shouldPass, shouldFail, {
                valType: 'subplotid',
                dflt: 'sp'
            });
        });

        it('should work for valType \'flaglist\' where', function() {
            var shouldPass = ['a', 'b', 'a+b', 'b+a', 'c'],
                shouldFail = [{}, [], 'red', null, undefined, '', 'a + b'];

            assert(shouldPass, shouldFail, {
                valType: 'flaglist',
                flags: ['a', 'b'],
                extras: ['c']
            });
        });

        it('should work for valType \'any\' where', function() {
            var shouldPass = ['', '120', null, false, {}, []],
                shouldFail = [undefined];

            assert(shouldPass, shouldFail, {
                valType: 'any'
            });
        });

        it('should work for valType \'info_array\' where', function() {
            var shouldPass = [[1, 2], [-20, '20']],
                shouldFail = [
                    {}, [], [10], [null, 10], ['aads', null],
                    'red', null, undefined, '',
                    [1, 10, null]
                ];

            assert(shouldPass, shouldFail, {
                valType: 'info_array',
                items: [{
                    valType: 'number', dflt: -20
                }, {
                    valType: 'number', dflt: 20
                }]
            });
        });

        it('should work for valType \'info_array\' (freeLength case)', function() {
            var shouldPass = [
                ['marker.color', 'red'],
                [{ 'marker.color': 'red' }, [1, 2]]
            ];
            var shouldFail = [
                ['marker.color', 'red', 'red'],
                [{ 'marker.color': 'red' }, [1, 2], 'blue']
            ];

            assert(shouldPass, shouldFail, {
                valType: 'info_array',
                freeLength: true,
                items: [{
                    valType: 'any'
                }, {
                    valType: 'any'
                }, {
                    valType: 'number'
                }]
            });
        });
    });

    describe('setCursor', function() {

        beforeEach(function() {
            this.el3 = d3.select(createGraphDiv());
        });

        afterEach(destroyGraphDiv);

        it('should assign cursor- class', function() {
            setCursor(this.el3, 'one');

            expect(this.el3.attr('class')).toEqual('cursor-one');
        });

        it('should assign cursor- class while present non-cursor- classes', function() {
            this.el3.classed('one', true);
            this.el3.classed('two', true);
            this.el3.classed('three', true);
            setCursor(this.el3, 'one');

            expect(this.el3.attr('class')).toEqual('one two three cursor-one');
        });

        it('should update class from one cursor- class to another', function() {
            this.el3.classed('cursor-one', true);
            setCursor(this.el3, 'two');

            expect(this.el3.attr('class')).toEqual('cursor-two');
        });

        it('should update multiple cursor- classes', function() {
            this.el3.classed('cursor-one', true);
            this.el3.classed('cursor-two', true);
            this.el3.classed('cursor-three', true);
            setCursor(this.el3, 'four');

            expect(this.el3.attr('class')).toEqual('cursor-four');
        });

        it('should remove cursor- if no new class is given', function() {
            this.el3.classed('cursor-one', true);
            this.el3.classed('cursor-two', true);
            this.el3.classed('cursor-three', true);
            setCursor(this.el3);

            expect(this.el3.attr('class')).toEqual('');
        });
    });

    describe('getTranslate', function() {

        it('should work with regular DOM elements', function() {
            var el = document.createElement('div');

            expect(Lib.getTranslate(el)).toEqual({ x: 0, y: 0 });

            el.setAttribute('transform', 'translate(123.45px, 67)');
            expect(Lib.getTranslate(el)).toEqual({ x: 123.45, y: 67 });

            el.setAttribute('transform', 'translate(123.45)');
            expect(Lib.getTranslate(el)).toEqual({ x: 123.45, y: 0 });

            el.setAttribute('transform', 'translate(1 2)');
            expect(Lib.getTranslate(el)).toEqual({ x: 1, y: 2 });

            el.setAttribute('transform', 'translate(1 2); rotate(20deg)');
            expect(Lib.getTranslate(el)).toEqual({ x: 1, y: 2 });

            el.setAttribute('transform', 'rotate(20deg) translate(1 2);');
            expect(Lib.getTranslate(el)).toEqual({ x: 1, y: 2 });

            el.setAttribute('transform', 'rotate(20deg)');
            expect(Lib.getTranslate(el)).toEqual({ x: 0, y: 0 });
        });

        it('should work with d3 elements', function() {
            var el = d3.select(document.createElement('div'));

            el.attr('transform', 'translate(123.45px, 67)');
            expect(Lib.getTranslate(el)).toEqual({ x: 123.45, y: 67 });

            el.attr('transform', 'translate(123.45)');
            expect(Lib.getTranslate(el)).toEqual({ x: 123.45, y: 0 });

            el.attr('transform', 'translate(1 2)');
            expect(Lib.getTranslate(el)).toEqual({ x: 1, y: 2 });

            el.attr('transform', 'translate(1 2); rotate(20)');
            expect(Lib.getTranslate(el)).toEqual({ x: 1, y: 2 });

            el.attr('transform', 'rotate(20)');
            expect(Lib.getTranslate(el)).toEqual({ x: 0, y: 0 });
        });
    });

    describe('setTranslate', function() {

        it('should work with regular DOM elements', function() {
            var el = document.createElement('div');

            Lib.setTranslate(el, 5);
            expect(el.getAttribute('transform')).toBe('translate(5, 0)');

            Lib.setTranslate(el, 10, 20);
            expect(el.getAttribute('transform')).toBe('translate(10, 20)');

            Lib.setTranslate(el);
            expect(el.getAttribute('transform')).toBe('translate(0, 0)');

            el.setAttribute('transform', 'translate(0, 0); rotate(30)');
            Lib.setTranslate(el, 30, 40);
            expect(el.getAttribute('transform')).toBe('rotate(30) translate(30, 40)');
        });

        it('should work with d3 elements', function() {
            var el = d3.select(document.createElement('div'));

            Lib.setTranslate(el, 5);
            expect(el.attr('transform')).toBe('translate(5, 0)');

            Lib.setTranslate(el, 30, 40);
            expect(el.attr('transform')).toBe('translate(30, 40)');

            Lib.setTranslate(el);
            expect(el.attr('transform')).toBe('translate(0, 0)');

            el.attr('transform', 'translate(0, 0); rotate(30)');
            Lib.setTranslate(el, 30, 40);
            expect(el.attr('transform')).toBe('rotate(30) translate(30, 40)');
        });
    });

    describe('getScale', function() {

        it('should work with regular DOM elements', function() {
            var el = document.createElement('div');

            expect(Lib.getScale(el)).toEqual({ x: 1, y: 1 });

            el.setAttribute('transform', 'scale(1.23, 45)');
            expect(Lib.getScale(el)).toEqual({ x: 1.23, y: 45 });

            el.setAttribute('transform', 'scale(123.45)');
            expect(Lib.getScale(el)).toEqual({ x: 123.45, y: 1 });

            el.setAttribute('transform', 'scale(0.1 2)');
            expect(Lib.getScale(el)).toEqual({ x: 0.1, y: 2 });

            el.setAttribute('transform', 'scale(0.1 2); rotate(20deg)');
            expect(Lib.getScale(el)).toEqual({ x: 0.1, y: 2 });

            el.setAttribute('transform', 'rotate(20deg) scale(0.1 2);');
            expect(Lib.getScale(el)).toEqual({ x: 0.1, y: 2 });

            el.setAttribute('transform', 'rotate(20deg)');
            expect(Lib.getScale(el)).toEqual({ x: 1, y: 1 });
        });

        it('should work with d3 elements', function() {
            var el = d3.select(document.createElement('div'));

            el.attr('transform', 'scale(1.23, 45)');
            expect(Lib.getScale(el)).toEqual({ x: 1.23, y: 45 });

            el.attr('transform', 'scale(123.45)');
            expect(Lib.getScale(el)).toEqual({ x: 123.45, y: 1 });

            el.attr('transform', 'scale(0.1 2)');
            expect(Lib.getScale(el)).toEqual({ x: 0.1, y: 2 });

            el.attr('transform', 'scale(0.1 2); rotate(20)');
            expect(Lib.getScale(el)).toEqual({ x: 0.1, y: 2 });

            el.attr('transform', 'rotate(20)');
            expect(Lib.getScale(el)).toEqual({ x: 1, y: 1 });
        });
    });

    describe('setScale', function() {

        it('should work with regular DOM elements', function() {
            var el = document.createElement('div');

            Lib.setScale(el, 5);
            expect(el.getAttribute('transform')).toBe('scale(5, 1)');

            Lib.setScale(el, 30, 40);
            expect(el.getAttribute('transform')).toBe('scale(30, 40)');

            Lib.setScale(el);
            expect(el.getAttribute('transform')).toBe('scale(1, 1)');

            el.setAttribute('transform', 'scale(1, 1); rotate(30)');
            Lib.setScale(el, 30, 40);
            expect(el.getAttribute('transform')).toBe('rotate(30) scale(30, 40)');
        });

        it('should work with d3 elements', function() {
            var el = d3.select(document.createElement('div'));

            Lib.setScale(el, 5);
            expect(el.attr('transform')).toBe('scale(5, 1)');

            Lib.setScale(el, 30, 40);
            expect(el.attr('transform')).toBe('scale(30, 40)');

            Lib.setScale(el);
            expect(el.attr('transform')).toBe('scale(1, 1)');

            el.attr('transform', 'scale(0, 0); rotate(30)');
            Lib.setScale(el, 30, 40);
            expect(el.attr('transform')).toBe('rotate(30) scale(30, 40)');
        });
    });

    describe('setPointGroupScale', function() {
        var el, sel;

        beforeEach(function() {
            el = document.createElement('div');
            sel = d3.select(el);
        });

        it('sets the scale of a point', function() {
            Lib.setPointGroupScale(sel, 2, 2);
            expect(el.getAttribute('transform')).toBe('scale(2,2)');
        });

        it('appends the scale of a point', function() {
            el.setAttribute('transform', 'translate(1,2)');
            Lib.setPointGroupScale(sel, 2, 2);
            expect(el.getAttribute('transform')).toBe('translate(1,2) scale(2,2)');
        });

        it('modifies the scale of a point', function() {
            el.setAttribute('transform', 'translate(1,2) scale(3,4)');
            Lib.setPointGroupScale(sel, 2, 2);
            expect(el.getAttribute('transform')).toBe('translate(1,2) scale(2,2)');
        });

        it('does not apply the scale of a point if scale (1, 1)', function() {
            el.setAttribute('transform', 'translate(1,2)');
            Lib.setPointGroupScale(sel, 1, 1);
            expect(el.getAttribute('transform')).toBe('translate(1,2)');
        });

        it('removes the scale of a point if scale (1, 1)', function() {
            el.setAttribute('transform', 'translate(1,2) scale(3,4)');
            Lib.setPointGroupScale(sel, 1, 1);
            expect(el.getAttribute('transform')).toBe('translate(1,2)');
        });
    });

    describe('pushUnique', function() {

        beforeEach(function() {
            this.obj = { a: 'A' };
            this.array = ['a', 'b', 'c', this.obj];
        });

        it('should fill new items in array', function() {
            var out = Lib.pushUnique(this.array, 'd');

            expect(this.array).toEqual(['a', 'b', 'c', { a: 'A' }, 'd']);
            expect(this.array).toBe(out);
        });

        it('should ignore falsy items', function() {
            Lib.pushUnique(this.array, false);
            expect(this.array).toEqual(['a', 'b', 'c', { a: 'A' }]);

            Lib.pushUnique(this.array, undefined);
            expect(this.array).toEqual(['a', 'b', 'c', { a: 'A' }]);

            Lib.pushUnique(this.array, 0);
            expect(this.array).toEqual(['a', 'b', 'c', { a: 'A' }]);

            Lib.pushUnique(this.array, null);
            expect(this.array).toEqual(['a', 'b', 'c', { a: 'A' }]);

            Lib.pushUnique(this.array, '');
            expect(this.array).toEqual(['a', 'b', 'c', { a: 'A' }]);
        });

        it('should ignore item already in array', function() {
            Lib.pushUnique(this.array, 'a');
            expect(this.array).toEqual(['a', 'b', 'c', { a: 'A' }]);

            Lib.pushUnique(this.array, this.obj);
            expect(this.array).toEqual(['a', 'b', 'c', { a: 'A' }]);

        });
    });

    describe('filterUnique', function() {

        it('should return array containing unique values', function() {
            expect(
                Lib.filterUnique(['a', 'a', 'b', 'b'])
            )
            .toEqual(['a', 'b']);

            expect(
                Lib.filterUnique(['1', ['1'], 1])
            )
            .toEqual(['1']);

            expect(
                Lib.filterUnique([1, '1', [1]])
            )
            .toEqual([1]);

            expect(
                Lib.filterUnique([ { a: 1 }, { b: 2 }])
            )
            .toEqual([{ a: 1 }]);

            expect(
                Lib.filterUnique([null, undefined, null, null, undefined])
            )
            .toEqual([null, undefined]);
        });

    });

    describe('numSeparate', function() {

        it('should work on numbers and strings', function() {
            expect(Lib.numSeparate(12345.67, '.,')).toBe('12,345.67');
            expect(Lib.numSeparate('12345.67', '.,')).toBe('12,345.67');
        });

        it('should ignore years', function() {
            expect(Lib.numSeparate(2016, '.,')).toBe('2016');
        });

        it('should work even for 4-digit integer if third argument is true', function() {
            expect(Lib.numSeparate(3000, '.,', true)).toBe('3,000');
        });

        it('should work for multiple thousands', function() {
            expect(Lib.numSeparate(1000000000, '.,')).toBe('1,000,000,000');
        });

        it('should work when there\'s only one separator', function() {
            expect(Lib.numSeparate(12.34, '|')).toBe('12|34');
            expect(Lib.numSeparate(1234.56, '|')).toBe('1234|56');
        });

        it('should throw an error when no separator is provided', function() {
            expect(function() {
                Lib.numSeparate(1234);
            }).toThrowError('Separator string required for formatting!');

            expect(function() {
                Lib.numSeparate(1234, '');
            }).toThrowError('Separator string required for formatting!');
        });
    });
});

describe('Queue', function() {
    'use strict';

    var gd;

    beforeEach(function() {
        gd = createGraphDiv();
    });

    afterEach(function() {
        destroyGraphDiv();
        Plotly.setPlotConfig({ queueLength: 0 });
    });

    it('should not fill in undoQueue by default', function(done) {
        Plotly.plot(gd, [{
            y: [2, 1, 2]
        }]).then(function() {
            expect(gd.undoQueue).toBeUndefined();

            return Plotly.restyle(gd, 'marker.color', 'red');
        }).then(function() {
            expect(gd.undoQueue.index).toEqual(0);
            expect(gd.undoQueue.queue).toEqual([]);

            return Plotly.relayout(gd, 'title', 'A title');
        }).then(function() {
            expect(gd.undoQueue.index).toEqual(0);
            expect(gd.undoQueue.queue).toEqual([]);

            done();
        });
    });

    it('should fill in undoQueue up to value found in *queueLength* config', function(done) {
        Plotly.setPlotConfig({ queueLength: 2 });

        Plotly.plot(gd, [{
            y: [2, 1, 2]
        }]).then(function() {
            expect(gd.undoQueue).toBeUndefined();

            return Plotly.restyle(gd, 'marker.color', 'red');
        }).then(function() {
            expect(gd.undoQueue.index).toEqual(1);
            expect(gd.undoQueue.queue[0].undo.args[0][1]['marker.color']).toEqual([undefined]);
            expect(gd.undoQueue.queue[0].redo.args[0][1]['marker.color']).toEqual('red');

            return Plotly.relayout(gd, 'title', 'A title');
        }).then(function() {
            expect(gd.undoQueue.index).toEqual(2);
            expect(gd.undoQueue.queue[1].undo.args[0][1].title).toEqual(undefined);
            expect(gd.undoQueue.queue[1].redo.args[0][1].title).toEqual('A title');

            return Plotly.restyle(gd, 'mode', 'markers');
        }).then(function() {
            expect(gd.undoQueue.index).toEqual(2);
            expect(gd.undoQueue.queue[2]).toBeUndefined();

            expect(gd.undoQueue.queue[1].undo.args[0][1].mode).toEqual([undefined]);
            expect(gd.undoQueue.queue[1].redo.args[0][1].mode).toEqual('markers');

            expect(gd.undoQueue.queue[0].undo.args[0][1].title).toEqual(undefined);
            expect(gd.undoQueue.queue[0].redo.args[0][1].title).toEqual('A title');

            done();
        });
    });
});