feat: add RGB to HSL color format conversion algorithm (#1475)

* feat: add RGB to HSL color format conversion algorithm

* test: add self-tests for rgb to hsl conversion algorithm

* fix: change function code to concise format

* fix: use throw and segregate the test cases

* chore: clean up the test format

* chore: use correct styling

Conversions/test/RgbHslConversion.test.js

@@ -0,0 +1,43 @@
+import { rgbToHsl } from '../RgbHslConversion'
+describe('RgbHslConversion', () => {
+  test.each([
+    [
+      [215, 19, 180],
+      [311, 84, 46]
+    ],
+    [
+      [21, 190, 18],
+      [119, 83, 41]
+    ],
+    [
+      [80, 100, 160],
+      [225, 33, 47]
+    ],
+    [
+      [80, 1, 16],
+      [349, 98, 16]
+    ],
+    [
+      [8, 20, 0],
+      [96, 100, 4]
+    ],
+    [
+      [0, 0, 0],
+      [0, 0, 0]
+    ],
+    [
+      [255, 255, 255],
+      [0, 0, 100]
+    ]
+  ])('Should return the color in HSL format.', (colorRgb, expected) => {
+    expect(rgbToHsl(colorRgb)).toEqual(expected)
+  })
+
+  test.each([
+    [[256, 180, 9], 'Input is not a valid RGB color.'],
+    [[-90, 46, 8], 'Input is not a valid RGB color.'],
+    [[1, 39, 900], 'Input is not a valid RGB color.']
+  ])('Should return the error message.', (colorRgb, expected) => {
+    expect(() => rgbToHsl(colorRgb)).toThrowError(expected)
+  })
+})