test: improve utils coverage (#4230)

* test: improve utils coverage

* refactor: review - rename isDefined to isNonNullable, update tests and return statement

packages/twenty-front/src/utils/array/__tests__/groupArrayItemsBy.test.ts

@@ -0,0 +1,25 @@
+import { groupArrayItemsBy } from '../groupArrayItemsBy';
+
+describe('groupArrayItemsBy', () => {
+  it('groups an array of objects by a computed key', () => {
+    // Given
+    const array = [
+      { id: '1', type: 'fruit', value: 'apple' },
+      { id: '2', type: 'fruit', value: 'banana' },
+      { id: '3', type: 'vegetable', value: 'carrot' },
+    ];
+    const computeGroupKey = ({ type }: (typeof array)[0]) => type;
+
+    // When
+    const result = groupArrayItemsBy(array, computeGroupKey);
+
+    // Then
+    expect(result).toEqual({
+      fruit: [
+        { id: '1', type: 'fruit', value: 'apple' },
+        { id: '2', type: 'fruit', value: 'banana' },
+      ],
+      vegetable: [{ id: '3', type: 'vegetable', value: 'carrot' }],
+    });
+  });
+});

packages/twenty-front/src/utils/array/__tests__/mapArrayToObject.test.ts

@@ -0,0 +1,23 @@
+import { mapArrayToObject } from '~/utils/array/mapArrayToObject';
+
+describe('mapArrayToObject', () => {
+  it('maps an array of objects to an object with computed keys', () => {
+    // Given
+    const array = [
+      { id: '1', value: 'one' },
+      { id: '2', value: 'two' },
+      { id: '3', value: 'three' },
+    ];
+    const computeItemKey = ({ id }: { id: string }) => id;
+
+    // When
+    const result = mapArrayToObject(array, computeItemKey);
+
+    // Then
+    expect(result).toEqual({
+      '1': { id: '1', value: 'one' },
+      '2': { id: '2', value: 'two' },
+      '3': { id: '3', value: 'three' },
+    });
+  });
+});