fix: #284 adding unit tests

Author: enriquezrene

src/app/modules/time-clock/pipes/time-details.pipe.spec.ts

@@ -1,3 +1,4 @@
+import { TimeDetails } from './../models/time.entry.summary';
 import { TimeDetailsPipe } from './time-details.pipe';
 
 describe('TimeDetailsPipe', () => {
@@ -10,4 +11,21 @@ describe('TimeDetailsPipe', () => {
     const pipe = new TimeDetailsPipe();
     expect(pipe.formatAsTwoDigit('5')).toBe('05');
   });
+
+  it('returns the same data if number has 2 digits', () => {
+    const pipe = new TimeDetailsPipe();
+    expect(pipe.formatAsTwoDigit('15')).toBe('15');
+  });
+
+  it('formats hour in expected format', () => {
+    const timeDetails = { hours: '1', minutes: '9', seconds: '00'};
+    const pipe = new TimeDetailsPipe();
+    expect('01:09').toBe(pipe.transform(timeDetails));
+  });
+
+  it('returns --:-- when timeDetails is null', () => {
+    const timeDetails = null;
+    const pipe = new TimeDetailsPipe();
+    expect('--:--').toBe(pipe.transform(timeDetails));
+  });
 });

src/app/modules/time-clock/pipes/time-details.pipe.ts

@@ -7,7 +7,11 @@ import { Pipe, PipeTransform } from '@angular/core';
 export class TimeDetailsPipe implements PipeTransform {
 
   transform(value: TimeDetails): string {
-    return `${this.formatAsTwoDigit(value?.hours)}:${this.formatAsTwoDigit(value?.minutes)}` ;
+    if (value) {
+      return `${this.formatAsTwoDigit(value.hours)}:${this.formatAsTwoDigit(value.minutes)}`;
+    } else {
+      return '--:--';
+    }
   }
 
   formatAsTwoDigit(time: string): string {