test: add test for Plotly.update

- testing that the correct subroutines are called.

Author: etpinard

test/jasmine/tests/plot_api_test.js

@@ -6,6 +6,7 @@ var Scatter = require('@src/traces/scatter');
 var Bar = require('@src/traces/bar');
 var Legend = require('@src/components/legend');
 var pkg = require('../../../package.json');
+var subroutines = require('@src/plot_api/subroutines');
 
 var createGraphDiv = require('../assets/create_graph_div');
 var destroyGraphDiv = require('../assets/destroy_graph_div');
@@ -879,4 +880,80 @@ describe('Test plot api', function() {
             expect(gd.data[1].contours).toBeUndefined();
         });
     });
+
+    describe('Plotly.update should', function() {
+        var gd, calcdata;
+
+        beforeAll(function() {
+            Object.keys(subroutines).forEach(function(k) {
+                spyOn(subroutines, k).and.callThrough();
+            });
+        });
+
+        beforeEach(function(done) {
+            gd = createGraphDiv();
+            Plotly.plot(gd, [{ y: [2, 1, 2] }]).then(function() {
+                calcdata = gd.calcdata;
+                done();
+            });
+        });
+
+        afterEach(destroyGraphDiv);
+
+        it('call doTraceStyle on trace style updates', function(done) {
+            expect(subroutines.doTraceStyle).not.toHaveBeenCalled();
+
+            Plotly.update(gd, { 'marker.color': 'blue' }).then(function() {
+                expect(subroutines.doTraceStyle).toHaveBeenCalledTimes(1);
+                expect(calcdata).toBe(gd.calcdata);
+                done();
+            });
+        });
+
+        it('clear calcdata on data updates', function(done) {
+            Plotly.update(gd, { x: [[3, 1, 3]] }).then(function() {
+                expect(calcdata).not.toBe(gd.calcdata);
+                done();
+            });
+        });
+
+        it('call doLegend on legend updates', function(done) {
+            expect(subroutines.doLegend).not.toHaveBeenCalled();
+
+            Plotly.update(gd, {}, { 'showlegend': true }).then(function() {
+                expect(subroutines.doLegend).toHaveBeenCalledTimes(1);
+                expect(calcdata).toBe(gd.calcdata);
+                done();
+            });
+        });
+
+        it('call layoutReplot when adding update menu', function(done) {
+            expect(subroutines.layoutReplot).not.toHaveBeenCalled();
+
+            var layoutUpdate = {
+                updatemenus: [{
+                    buttons: [{
+                        method: 'relayout',
+                        args: ['title', 'Hello World']
+                    }]
+                }]
+            };
+
+            Plotly.update(gd, {}, layoutUpdate).then(function() {
+                expect(subroutines.doLegend).toHaveBeenCalledTimes(1);
+                expect(calcdata).toBe(gd.calcdata);
+                done();
+            });
+        });
+
+        it('call doModeBar when updating \'dragmode\'', function(done) {
+            expect(subroutines.doModeBar).not.toHaveBeenCalled();
+
+            Plotly.update(gd, {}, { 'dragmode': 'pan' }).then(function() {
+                expect(subroutines.doModeBar).toHaveBeenCalledTimes(1);
+                expect(calcdata).toBe(gd.calcdata);
+                done();
+            });
+        });
+    });
 });