[Plot] Restore coverage on PlotController

Restore full test coverage on PlotController after
refactoring for WTD-625, stacked plots.

platform/features/plot/test/PlotControllerSpec.js

@@ -13,6 +13,7 @@ define(
                 mockTelemetry, // mock telemetry controller
                 mockData,
                 mockElement,
+                mockDomainObject,
                 controller;
 
             function echo(i) { return i; }
@@ -34,6 +35,10 @@ define(
                     "element",
                     [ "getBoundingClientRect" ]
                 );
+                mockDomainObject = jasmine.createSpyObj(
+                    "domainObject",
+                    [ "getId", "getModel", "getCapability" ]
+                );
 
                 mockScope.telemetry = mockTelemetry;
                 mockTelemetry.getResponse.andReturn([mockData]);
@@ -76,8 +81,82 @@ define(
                 // Just want to not have an exception
             });
 
+            it("draws lines when data becomes available", function () {
+                // Verify precondition
+                controller.getSubPlots().forEach(function (subplot) {
+                    expect(subplot.getDrawingObject().lines)
+                        .not.toBeDefined();
+                });
+
+                // Make sure there actually are subplots being verified
+                expect(controller.getSubPlots().length > 0)
+                    .toBeTruthy();
+
+                // Broadcast data
+                mockScope.$on.mostRecentCall.args[1]();
+
+                controller.getSubPlots().forEach(function (subplot) {
+                    expect(subplot.getDrawingObject().lines)
+                        .toBeDefined();
+                });
+            });
 
 
+            it("changes modes depending on number of objects", function () {
+                var expectedWatch = "telemetry.getTelemetryObjects()",
+                    watchFunction;
+
+                // Find the watch for telemetry objects, which
+                // should change plot mode options
+                mockScope.$watch.calls.forEach(function (call) {
+                    if (call.args[0] === expectedWatch) {
+                        watchFunction = call.args[1];
+                    }
+                });
+
+                watchFunction([mockDomainObject]);
+                expect(controller.getModeOptions().length).toEqual(1);
+
+                watchFunction([
+                    mockDomainObject,
+                    mockDomainObject,
+                    mockDomainObject
+                ]);
+                expect(controller.getModeOptions().length).toEqual(2);
+            });
+
+            // Interface tests follow; these will be delegated (mostly
+            // to PlotModeOptions, which is tested separately).
+            it("provides access to available plot mode options", function () {
+                expect(Array.isArray(controller.getModeOptions()))
+                    .toBeTruthy();
+            });
+
+            it("provides a current plot mode", function () {
+                expect(controller.getMode().name)
+                    .toEqual(jasmine.any(String));
+            });
+
+            it("allows plot mode to be changed", function () {
+                expect(function () {
+                    controller.setMode(controller.getMode());
+                }).not.toThrow();
+            });
+
+            it("provides an array of sub-plots", function () {
+                expect(Array.isArray(controller.getSubPlots()))
+                    .toBeTruthy();
+            });
+
+            it("allows plots to be updated", function () {
+                expect(controller.update).not.toThrow();
+            });
+
+            it("allows changing pan-zoom state", function () {
+                expect(controller.isZoomed).not.toThrow();
+                expect(controller.stepBackPanZoom).not.toThrow();
+                expect(controller.unzoom).not.toThrow();
+            });
         });
     }
 );