[DSC-1932] Added unit tests case for 'dsSort' pipe

Author: Simone-Ramundi

src/app/shared/utils/sort.pipe.spec.ts

@@ -0,0 +1,65 @@
+import { SortPipe } from './sort.pipe';
+
+describe('SortPipe', () => {
+  let pipe: SortPipe;
+
+  beforeEach(() => {
+    pipe = new SortPipe();
+  });
+
+  it('should return the original value if value is null or undefined', () => {
+    expect(pipe.transform(null)).toBeNull();
+    expect(pipe.transform(undefined)).toBeUndefined();
+  });
+
+  it('should return the original value if no order is invalid', () => {
+    const inputArray = [3, 1, 2];
+    expect(pipe.transform(inputArray, '', null)).toEqual(inputArray);
+  });
+
+  it('should sort the array in ascending order if no column is provided', () => {
+    const inputArray = [3, 1, 2];
+    const sortedArray = [1, 2, 3];
+    expect(pipe.transform(inputArray, '')).toEqual(sortedArray);
+  });
+
+  it('should sort the array in descending order if no column is provided and order is desc', () => {
+    const inputArray = [3, 1, 2];
+    const sortedArray = [3, 2, 1];
+    expect(pipe.transform(inputArray, '', 'desc')).toEqual(sortedArray);
+  });
+
+  it('should return the original array if it contains one or fewer elements', () => {
+    const inputArray = [1];
+    expect(pipe.transform(inputArray)).toEqual(inputArray);
+    expect(pipe.transform([])).toEqual([]);
+  });
+
+  it('should sort the array by a specific column in ascending order', () => {
+    const inputArray = [
+      { label: 'banana' },
+      { label: 'apple' },
+      { label: 'cherry' }
+    ];
+    const sortedArray = [
+      { label: 'apple' },
+      { label: 'banana' },
+      { label: 'cherry' }
+    ];
+    expect(pipe.transform(inputArray, 'label')).toEqual(sortedArray);
+  });
+
+  it('should sort the array by a specific column in descending order', () => {
+    const inputArray = [
+      { label: 'banana' },
+      { label: 'apple' },
+      { label: 'cherry' }
+    ];
+    const sortedArray = [
+      { label: 'cherry' },
+      { label: 'banana' },
+      { label: 'apple' }
+    ];
+    expect(pipe.transform(inputArray, 'label', 'desc')).toEqual(sortedArray);
+  });
+});