Initial commit: Frühstückskonten Verwaltung Web-App

node_modules/exponential-backoff/src/delay/always/always.delay.spec.ts

@@ -0,0 +1,65 @@
+import { AlwaysDelay } from "./always.delay";
+import { IBackOffOptions, getSanitizedOptions } from "../../options";
+
+describe(AlwaysDelay.name, () => {
+  let options: IBackOffOptions;
+  let delay: AlwaysDelay;
+
+  function initClass() {
+    delay = new AlwaysDelay(options);
+  }
+
+  beforeEach(() => {
+    options = getSanitizedOptions({});
+    initClass();
+    jest.useFakeTimers();
+  });
+
+  it(`when calling #apply, the delay is equal to the starting delay`, async () => {
+    const spy = jest.fn();
+    delay.apply().then(spy);
+    jest.runTimersToTime(options.startingDelay);
+    await Promise.resolve();
+
+    expect(spy).toHaveBeenCalledTimes(1);
+  });
+
+  it(`when the attempt number is 1, when calling #apply,
+  the delay is equal to the starting delay multiplied by the time multiple`, async () => {
+    delay.setAttemptNumber(1);
+
+    const spy = jest.fn();
+    delay.apply().then(spy);
+    jest.runTimersToTime(options.startingDelay * options.timeMultiple);
+    await Promise.resolve();
+
+    expect(spy).toHaveBeenCalledTimes(1);
+  });
+
+  it(`when the attempt number is 2, when calling #apply,
+  the delay is equal to the starting delay multiplied by the time multiple raised by the attempt number`, async () => {
+    const attemptNumber = 2;
+    delay.setAttemptNumber(attemptNumber);
+
+    const spy = jest.fn();
+    delay.apply().then(spy);
+    jest.runTimersToTime(
+      options.startingDelay * Math.pow(options.timeMultiple, attemptNumber)
+    );
+    await Promise.resolve();
+
+    expect(spy).toHaveBeenCalledTimes(1);
+  });
+
+  it(`when the #maxDelay is less than #startingDelay, when calling #apply,
+  the delay is equal to the #maxDelay`, async () => {
+    options.maxDelay = options.startingDelay - 1;
+
+    const spy = jest.fn();
+    delay.apply().then(spy);
+    jest.runTimersToTime(options.maxDelay);
+    await Promise.resolve();
+
+    expect(spy).toHaveBeenCalledTimes(1);
+  });
+});