1 files changed, 71 insertions, 0 deletions
diff --git a/src/pybind/mgr/dashboard/frontend/src/app/shared/services/time-diff.service.spec.ts b/src/pybind/mgr/dashboard/frontend/src/app/shared/services/time-diff.service.spec.ts
new file mode 100644
index 000000000..52be82b09
--- /dev/null
+++ b/src/pybind/mgr/dashboard/frontend/src/app/shared/services/time-diff.service.spec.ts
@@ -0,0 +1,71 @@
+import { TestBed } from '@angular/core/testing';
+
+import { configureTestBed } from '~/testing/unit-test-helper';
+import { TimeDiffService } from './time-diff.service';
+
+describe('TimeDiffService', () => {
+  let service: TimeDiffService;
+  const baseTime = new Date('2022-02-22T00:00:00');
+
+  configureTestBed({
+    providers: [TimeDiffService]
+  });
+
+  beforeEach(() => {
+    service = TestBed.inject(TimeDiffService);
+  });
+
+  it('should be created', () => {
+    expect(service).toBeTruthy();
+  });
+
+  it('calculates a new date that happens after the given date', () => {
+    expect(service.calculateDate(new Date('2022-02-28T04:05:00'), '2h')).toEqual(
+      new Date('2022-02-28T06:05:00')
+    );
+    expect(service.calculateDate(baseTime, '15m')).toEqual(new Date('2022-02-22T00:15'));
+    expect(service.calculateDate(baseTime, '5d 23h')).toEqual(new Date('2022-02-27T23:00'));
+  });
+
+  it('calculates a new date that happens before the given date', () => {
+    expect(service.calculateDate(new Date('2022-02-22T02:00:00'), '2h', true)).toEqual(baseTime);
+  });
+
+  it('calculates the difference of two dates', () => {
+    expect(
+      service.calculateDuration(new Date('2022-02-22T00:45:00'), new Date('2022-02-22T02:00:00'))
+    ).toBe('1h 15m');
+    expect(service.calculateDuration(baseTime, new Date('2022-02-28T04:05:00'))).toBe('6d 4h 5m');
+  });
+
+  it('should return an empty string if time diff is less then a minute', () => {
+    const ts = 1568361327000;
+    expect(service.calculateDuration(new Date(ts), new Date(ts + 120))).toBe('');
+  });
+
+  describe('testing duration calculation in detail', () => {
+    const minutes = 60 * 1000;
+    const hours = 60 * minutes;
+    const days = 24 * hours;
+
+    it('should allow different writings', () => {
+      const expectDurationToBeMs = (duration: string, ms: number) =>
+        expect(service['getDurationMs'](duration)).toBe(ms);
+      expectDurationToBeMs('2h', 2 * hours);
+      expectDurationToBeMs('4 Days', 4 * days);
+      expectDurationToBeMs('3 minutes', 3 * minutes);
+      expectDurationToBeMs('4 Days 2h 3 minutes', 4 * days + 2 * hours + 3 * minutes);
+      expectDurationToBeMs('5d3h120m', 5 * days + 5 * hours);
+    });
+
+    it('should create duration string from ms', () => {
+      const expectMsToBeDuration = (ms: number, duration: string) =>
+        expect(service['getDuration'](ms)).toBe(duration);
+      expectMsToBeDuration(2 * hours, '2h');
+      expectMsToBeDuration(4 * days, '4d');
+      expectMsToBeDuration(3 * minutes, '3m');
+      expectMsToBeDuration(4 * days + 2 * hours + 3 * minutes, '4d 2h 3m');
+      expectMsToBeDuration(service['getDurationMs']('5d3h120m'), '5d 5h');
+    });
+  });
+});