Merge pull request #812 from plotly/pr783-heatmap-calc-fixup

Add test case for PR 783

Author: etpinard

test/jasmine/tests/heatmap_test.js

@@ -302,6 +302,18 @@ describe('heatmap calc', function() {
         expect(out.y).toBeCloseToArray([-0.5, 0.5, 1.5]);
         expect(out.z).toBeCloseTo2DArray([[1, 2, 3], [3, 1, 2]]);
     });
+
+    it('should handle the category case', function() {
+        var out = _calc({
+            x: ['a', 'b', 'c'],
+            y: ['z'],
+            z: [[17, 18, 19]]
+        });
+
+        expect(out.x).toBeCloseToArray([-0.5, 0.5, 1.5, 2.5]);
+        expect(out.y).toBeCloseToArray([-0.5, 0.5]);
+        expect(out.z).toBeCloseTo2DArray([[17, 18, 19]]);
+    });
 });
 
 describe('heatmap plot', function() {