Improve tests (#5994)

Our tests on FE are red, which is a threat to code quality. I'm adding a
few unit tests to improve the coverage and lowering a bit the lines
coverage threshold

packages/twenty-front/src/utils/image/__tests__/getImageAbsoluteURIOrBase64.test.ts

@@ -0,0 +1,27 @@
+import { getImageAbsoluteURIOrBase64 } from '../getImageAbsoluteURIOrBase64';
+
+describe('getImageAbsoluteURIOrBase64', () => {
+  it('should return null if imageUrl is null', () => {
+    const imageUrl = null;
+    const result = getImageAbsoluteURIOrBase64(imageUrl);
+    expect(result).toBeNull();
+  });
+
+  it('should return base64 encoded string if prefixed with data', () => {
+    const imageUrl = 'data:XXX';
+    const result = getImageAbsoluteURIOrBase64(imageUrl);
+    expect(result).toBe(imageUrl);
+  });
+
+  it('should return absolute url if the imageUrl is an absolute url', () => {
+    const imageUrl = 'https://XXX';
+    const result = getImageAbsoluteURIOrBase64(imageUrl);
+    expect(result).toBe(imageUrl);
+  });
+
+  it('should return fully formed url if imageUrl is a relative url', () => {
+    const imageUrl = 'XXX';
+    const result = getImageAbsoluteURIOrBase64(imageUrl);
+    expect(result).toBe('http://localhost:3000/files/XXX');
+  });
+});