test colorbar floating point fix

Author: alexcjohnson

test/jasmine/tests/colorbar_test.js

@@ -1,4 +1,7 @@
+var Plotly = require('@lib/index');
 var Colorbar = require('@src/components/colorbar');
+var createGraphDiv = require('../assets/create_graph_div');
+var destroyGraphDiv = require('../assets/destroy_graph_div');
 
 
 describe('Test colorbar:', function() {
@@ -29,4 +32,28 @@ describe('Test colorbar:', function() {
             expect(hasColorbar(trace.marker.line)).toBe(false);
         });
     });
+
+    describe('floating point limits', function() {
+        var gd;
+
+        beforeEach(function() {
+            gd = createGraphDiv();
+        });
+
+        afterEach(destroyGraphDiv);
+
+        it('does not lock up on tiny fractional ranges', function(done) {
+            var z = [
+                [9607345622458638.0, 9607345622458652.0, 9607345622458652.0, 9607345622458646.0, 9607345622458652.0, 9607345622458650.0, 9607345622458650.0, 9607345622458646.0],
+                [9607345622458654.0, 9607345622458640.0, 9607345622458650.0, 9607345622458652.0, 9607345622458652.0, 9607345622458654.0, 9607345622458650.0, 9607345622458652.0],
+                [9607345622458654.0, 9607345622458652.0, 9607345622458638.0, 9607345622458652.0, 9607345622458650.0, 9607345622458652.0, 9607345622458654.0, 9607345622458650.0],
+                [9607345622458650.0, 9607345622458652.0, 9607345622458650.0, 9607345622458632.0, 9607345622458644.0, 9607345622458646.0, 9607345622458646.0, 9607345622458650.0],
+                [9607345622458654.0, 9607345622458652.0, 9607345622458650.0, 9607345622458650.0, 9607345622458638.0, 9607345622458654.0, 9607345622458654.0, 9607345622458650.0],
+                [9607345622458650.0, 9607345622458654.0, 9607345622458650.0, 9607345622458646.0, 9607345622458652.0, 9607345622458638.0, 9607345622458646.0, 9607345622458652.0],
+                [9607345622458654.0, 9607345622458652.0, 9607345622458654.0, 9607345622458650.0, 9607345622458654.0, 9607345622458652.0, 9607345622458640.0, 9607345622458654.0],
+                [9607345622458650.0, 9607345622458652.0, 9607345622458650.0, 9607345622458652.0, 9607345622458650.0, 9607345622458654.0, 9607345622458654.0, 9607345622458638.0]
+            ];
+            Plotly.newPlot(gd, [{type: 'heatmap', z: z}]).then(done);
+        });
+    });
 });