feat: Best Practices (#102)

* feat: best practices

* feat: add tests workflow

* feat: add best-practices workflow

* fix: wrong indentation in workflow

src/shared/util/colors.ts

@@ -6,7 +6,7 @@ export interface CourseColors {
 }
 
 // calculates luminance of a hex string
-function getLuminance(hex: string): number {
+export function getLuminance(hex: string): number {
     let r = parseInt(hex.substring(1, 3), 16);
     let g = parseInt(hex.substring(3, 5), 16);
     let b = parseInt(hex.substring(5, 7), 16);

src/shared/util/tests/colors.test.ts

@@ -0,0 +1,22 @@
+import { describe, expect, it } from 'vitest';
+
+import { getLuminance } from '../colors';
+
+describe('getLuminance', () => {
+    it('should return the correct luminance value for a given hex color', () => {
+        // Test case 1: Hex color #FFFFFF (white)
+        expect(getLuminance('#FFFFFF')).toBeCloseTo(1);
+
+        // Test case 2: Hex color #000000 (black)
+        expect(getLuminance('#000000')).toBeCloseTo(0);
+
+        // Test case 3: Hex color #FF0000 (red)
+        expect(getLuminance('#FF0000')).toBeCloseTo(0.2126);
+
+        // Test case 4: Hex color #00FF00 (green)
+        expect(getLuminance('#00FF00')).toBeCloseTo(0.7152);
+
+        // Test case 5: Hex color #0000FF (blue)
+        expect(getLuminance('#0000FF')).toBeCloseTo(0.0722);
+    });
+});

src/shared/util/tests/random.test.ts

@@ -0,0 +1,26 @@
+import { describe, expect, it } from 'vitest';
+
+import { generateRandomId } from '../random';
+
+describe('generateRandomId', () => {
+    it('should generate a random ID with the specified length', () => {
+        // Test case 1: Length 5
+        expect(generateRandomId(5)).toHaveLength(5);
+
+        // Test case 2: Length 10
+        expect(generateRandomId(10)).toHaveLength(10);
+
+        // Test case 3: Length 15
+        expect(generateRandomId(15)).toHaveLength(15);
+    });
+
+    it('should generate a unique ID each time', () => {
+        // Generate 100 IDs and check if they are all unique
+        const ids = new Set<string>();
+        for (let i = 0; i < 100; i += 1) {
+            const id = generateRandomId();
+            expect(ids.has(id)).toBe(false);
+            ids.add(id);
+        }
+    });
+});

src/shared/util/tests/string.test.ts

@@ -0,0 +1,39 @@
+import { describe, expect, it } from 'vitest';
+
+import { capitalize } from '../string';
+
+// TODO: Fix `string.ts` and `string.test.ts` to make the tests pass
+// `capitalize` is adding an extra space at the end of the word.
+describe('capitalize', () => {
+    it('should capitalize the first letter of each word', () => {
+        // Debug
+        const word = 'hello world';
+        const capitalized = capitalize(word);
+        console.log(capitalize(word));
+        console.log(capitalized.length);
+        console.log(capitalized.split(''));
+
+        // Test case 1: Single word
+        expect(capitalize('hello')).toBe('Hello');
+
+        // Test case 2: Multiple words
+        expect(capitalize('hello world')).toBe('Hello World');
+
+        // Test case 3: Words with hyphens
+        expect(capitalize('hello-world')).toBe('Hello-World');
+
+        // Test case 4: Words with hyphens and spaces
+        expect(capitalize('hello-world test')).toBe('Hello-World Test');
+    });
+
+    it('should not change the capitalization of the remaining letters', () => {
+        // Test case 1: All lowercase
+        expect(capitalize('hello')).toBe('Hello');
+
+        // Test case 2: All uppercase
+        expect(capitalize('WORLD')).toBe('WORLD');
+
+        // Test case 3: Mixed case
+        expect(capitalize('HeLLo WoRLd')).toBe('Hello World');
+    });
+});

src/shared/util/tests/time.test.ts

@@ -0,0 +1,14 @@
+import { describe, expect, it } from 'vitest';
+
+import { sleep } from '../time';
+
+describe('sleep', () => {
+    it('should resolve after the specified number of milliseconds', async () => {
+        const start = Date.now();
+        const milliseconds = 1000;
+        await sleep(milliseconds);
+        const end = Date.now();
+        const elapsed = end - start;
+        expect(elapsed).toBeGreaterThanOrEqual(milliseconds);
+    });
+});