MOBILE-4069 test: Add unit tests to CoreColors singleton

src/core/singletons/colors.ts

@@ -93,7 +93,7 @@ export class CoreColors {
      * @return Color in hex format.
      */
     static getColorHex(color: string): string {
-        const rgba = CoreColors.getColorRGBA(color, true);
+        const rgba = CoreColors.getColorRGBA(color);
         if (rgba.length === 0) {
             return '';
         }
@@ -109,21 +109,20 @@ export class CoreColors {
      * Returns RGBA color from any color format.
      *
      * @param color Color in any format.
-     * @param createElement Wether create a new element is needed to calculate value.
      * @return Red, green, blue and alpha.
      */
-    static getColorRGBA(color: string, createElement = false): number[] {
-        if (createElement) {
+    static getColorRGBA(color: string): number[] {
+        if (!color.match(/rgba?\(.*\)/)) {
+            // Convert the color to RGB format.
             const d = document.createElement('span');
             d.style.color = color;
             document.body.appendChild(d);
 
-            // Color in RGB.
             color = getComputedStyle(d).color;
             document.body.removeChild(d);
         }
 
-        const matches = color.match(/\d+/g) || [];
+        const matches = color.match(/\d+[^.]|\d*\.\d*/g) || [];
 
         return matches.map((a, index) => index < 3 ? parseInt(a, 10) : parseFloat(a));
     }

src/core/singletons/tests/colors.test.ts

@@ -0,0 +1,94 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { CoreColors } from '@singletons/colors';
+
+describe('CoreColors singleton', () => {
+
+    it('determines if white contrast is better', () => {
+        expect(CoreColors.isWhiteContrastingBetter('#000000')).toBe(true);
+        expect(CoreColors.isWhiteContrastingBetter('#999999')).toBe(true);
+        expect(CoreColors.isWhiteContrastingBetter('#aaaaaa')).toBe(false);
+        expect(CoreColors.isWhiteContrastingBetter('#ffffff')).toBe(false);
+        expect(CoreColors.isWhiteContrastingBetter('#ff0000')).toBe(true);
+        expect(CoreColors.isWhiteContrastingBetter('#00ff00')).toBe(false);
+        expect(CoreColors.isWhiteContrastingBetter('#0000ff')).toBe(true);
+        expect(CoreColors.isWhiteContrastingBetter('#ff00ff')).toBe(true);
+        expect(CoreColors.isWhiteContrastingBetter('#ffff00')).toBe(false);
+    });
+
+    it('makes color darker', () => {
+        expect(CoreColors.darker('#ffffff', 50)).toEqual('#7f7f7f');
+        expect(CoreColors.darker('#ffffff', 20)).toEqual('#cccccc');
+        expect(CoreColors.darker('#ffffff', 80)).toEqual('#323232');
+        expect(CoreColors.darker('#aabbcc', 40)).toEqual('#66707a');
+    });
+
+    it('makes color lighter', () => {
+        expect(CoreColors.lighter('#000000', 50)).toEqual('#7f7f7f');
+        expect(CoreColors.lighter('#000000', 20)).toEqual('#333333');
+        expect(CoreColors.lighter('#000000', 80)).toEqual('#cccccc');
+        expect(CoreColors.lighter('#223344', 40)).toEqual('#7a848e');
+    });
+
+    it('gets color hex value', () => {
+        expect(CoreColors.getColorHex('#123456')).toEqual('#123456');
+        expect(CoreColors.getColorHex('rgb(255, 100, 70)')).toEqual('#ff6446');
+        expect(CoreColors.getColorHex('rgba(255, 100, 70, 0.5)')).toEqual('#ff6446');
+
+        // @todo: There are problems when testing color names (e.g. violet) or hsf colors.
+        // They work fine in real browsers but not in unit tests.
+    });
+
+    it('gets color RGBA value', () => {
+        expect(CoreColors.getColorRGBA('#123456')).toEqual([18, 52, 86]);
+        expect(CoreColors.getColorRGBA('rgb(255, 100, 70)')).toEqual([255, 100, 70]);
+        expect(CoreColors.getColorRGBA('rgba(255, 100, 70, 0.5)')).toEqual([255, 100, 70, 0.5]);
+
+        // @todo: There are problems when testing color names (e.g. violet) or hsf colors.
+        // They work fine in real browsers but not in unit tests.
+    });
+
+    it('converts hex to rgb', () => {
+        expect(CoreColors.hexToRGB('#000000')).toEqual({
+            red: 0,
+            green: 0,
+            blue: 0,
+        });
+        expect(CoreColors.hexToRGB('#ffffff')).toEqual({
+            red: 255,
+            green: 255,
+            blue: 255,
+        });
+        expect(CoreColors.hexToRGB('#aabbcc')).toEqual({
+            red: 170,
+            green: 187,
+            blue: 204,
+        });
+    });
+
+    it('gets toolbar background color', () => {
+        document.body.style.setProperty('--core-header-toolbar-background', '#aabbcc');
+        expect(CoreColors.getToolbarBackgroundColor()).toEqual('#aabbcc');
+
+        const header = document.createElement('ion-header');
+        const toolbar = document.createElement('ion-toolbar');
+        toolbar.style.setProperty('--background', '#123456');
+        header.appendChild(toolbar);
+        document.body.appendChild(header);
+
+        expect(CoreColors.getToolbarBackgroundColor()).toEqual('#123456');
+    });
+
+});