[Plot] Fill in specs

Fill in specs for elements used by the PlotController
in order to improve coverage of the plot bundle.
WTD-533.

platform/features/plot/test/elements/PlotPaletteSpec.js

@@ -9,6 +9,96 @@ define(
         "use strict";
 
         describe("The plot palette", function () {
+            it("can be used as a constructor", function () {
+                // PlotPalette has all static methods, so make
+                // sure it returns itself if used as a constructor.
+                expect(new PlotPalette()).toBe(PlotPalette);
+            });
+
+            it("has 30 unique colors in an integer format", function () {
+                // Integer format may be useful internal to the application.
+                // RGB 0-255
+                var i, j;
+
+                // Used to verify one of R, G, B in loop below
+                function verifyChannel(c) {
+                    expect(typeof c).toEqual("number");
+                    expect(c <= 255).toBeTruthy();
+                    expect(c >= 0).toBeTruthy();
+                }
+
+                for (i = 0; i < 30; i += 1) {
+                    // Verify that we got an array of numbers
+                    expect(Array.isArray(PlotPalette.getIntegerColor(i)))
+                        .toBeTruthy();
+                    expect(PlotPalette.getIntegerColor(i).length).toEqual(3);
+
+                    // Verify all three channels for type and range
+                    PlotPalette.getIntegerColor(i).forEach(verifyChannel);
+
+                    // Verify uniqueness
+                    for (j = i + 1; j < 30; j += 1) {
+                        expect(PlotPalette.getIntegerColor(i)).not.toEqual(
+                            PlotPalette.getIntegerColor(j)
+                        );
+                    }
+                }
+            });
+
+
+            it("has 30 unique colors in a floating-point format", function () {
+                // Float format is useful to WebGL.
+                // RGB 0.0-1.1
+                var i, j;
+
+                // Used to verify one of R, G, B in loop below
+                function verifyChannel(c) {
+                    expect(typeof c).toEqual("number");
+                    expect(c <= 1.0).toBeTruthy();
+                    expect(c >= 0.0).toBeTruthy();
+                }
+
+                for (i = 0; i < 30; i += 1) {
+                    // Verify that we got an array of numbers
+                    expect(Array.isArray(PlotPalette.getFloatColor(i)))
+                        .toBeTruthy();
+                    expect(PlotPalette.getFloatColor(i).length).toEqual(4);
+
+                    // Verify all three channels for type and range
+                    PlotPalette.getFloatColor(i).forEach(verifyChannel);
+
+                    // Verify uniqueness
+                    for (j = i + 1; j < 30; j += 1) {
+                        expect(PlotPalette.getFloatColor(i)).not.toEqual(
+                            PlotPalette.getFloatColor(j)
+                        );
+                    }
+                }
+            });
+
+
+            it("has 30 unique colors in a string format", function () {
+                // String format is useful in stylesheets
+                // #RRGGBB in hex
+                var i, j, c;
+
+
+                for (i = 0; i < 30; i += 1) {
+                    c = PlotPalette.getStringColor(i);
+
+                    // Verify that we #-style color strings
+                    expect(typeof c).toEqual('string');
+                    expect(c.length).toEqual(7);
+                    expect(/^#[0-9a-fA-F]+$/.test(c)).toBeTruthy();
+
+                    // Verify uniqueness
+                    for (j = i + 1; j < 30; j += 1) {
+                        expect(PlotPalette.getStringColor(i)).not.toEqual(
+                            PlotPalette.getStringColor(j)
+                        );
+                    }
+                }
+            });
         });
     }
 );