Harvmaster/xo-cash-utils
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Rename mock functions in Vi

Browse Source
This commit is contained in:
Harvmaster
2026-07-18 16:12:17 +00:00
parent 7d40a40ea9
commit 448ef5ca61
1 changed files with 44 additions and 44 deletions
Download Patch File Download Diff File Expand all files Collapse all files

88
test/exponential-backoff.test.ts
View File

@@ -15,22 +15,22 @@ const testExponentialBackoffRunUsesDefaultOptions = async (): Promise<void> => {
try {
// The wrapped function fails on its first invocation and succeeds on the second.
// That forces ExponentialBackoff.run down the retry path using default options.
const fn = vi.fn().mockRejectedValueOnce(new Error('retry me'))
const rejectThenResolveFn = vi.fn().mockRejectedValueOnce(new Error('retry me'))
.mockResolvedValueOnce('static-result');
// Call the static helper with no onError and no options — defaults apply entirely.
const promise = ExponentialBackoff.run(fn);
const promise = ExponentialBackoff.run(rejectThenResolveFn);
// Yield one microtask so the first (immediate) attempt completes and schedules the retry timer.
await Promise.resolve();
expect(fn).toHaveBeenCalledTimes(1);
expect(rejectThenResolveFn).toHaveBeenCalledTimes(1);
// Default baseDelay is 1000ms; advancing less would not trigger the retry yet.
await vi.advanceTimersByTimeAsync(1_000);
// The retry should have succeeded and returned the resolved value from the mock.
await expect(promise).resolves.toBe('static-result');
expect(fn).toHaveBeenCalledTimes(2);
expect(rejectThenResolveFn).toHaveBeenCalledTimes(2);
} finally {
vi.useRealTimers();
vi.restoreAllMocks();
@@ -43,19 +43,19 @@ const testExponentialBackoffRunUsesDefaultOptions = async (): Promise<void> => {
*/
const testExponentialBackoffRunWithPartialOptions = async (): Promise<void> => {
// Same fail-then-succeed pattern; we only care that partial options still enable a retry.
const fn = vi.fn().mockRejectedValueOnce(new Error('retry me'))
const rejectThenResolveFn = vi.fn().mockRejectedValueOnce(new Error('retry me'))
.mockResolvedValueOnce('done');
// baseDelay/jitter of 0 skip real waiting; maxAttempts: 3 gives headroom for one retry.
// onError is explicitly undefined to verify the default no-op handler is used.
const result = await ExponentialBackoff.run(fn, undefined, {
const result = await ExponentialBackoff.run(rejectThenResolveFn, undefined, {
baseDelay: 0,
jitter: 0,
maxAttempts: 3,
});
expect(result).toBe('done');
expect(fn).toHaveBeenCalledTimes(2);
expect(rejectThenResolveFn).toHaveBeenCalledTimes(2);
};
/**
@@ -63,16 +63,16 @@ const testExponentialBackoffRunWithPartialOptions = async (): Promise<void> => {
* the instance's stored options when no per-run options are supplied.
*/
const testExponentialBackoffInstanceRunUsesDefaultOnError = async (): Promise<void> => {
const fn = vi.fn().mockRejectedValueOnce(new Error('retry me'))
const rejectThenResolveFn = vi.fn().mockRejectedValueOnce(new Error('retry me'))
.mockResolvedValueOnce('instance-result');
// Options live on the instance; run(fn) should read them instead of static defaults.
const backoff = new ExponentialBackoff({ baseDelay: 0, jitter: 0, maxAttempts: 3 });
const result = await backoff.run(fn);
const result = await backoff.run(rejectThenResolveFn);
expect(result).toBe('instance-result');
expect(fn).toHaveBeenCalledTimes(2);
expect(rejectThenResolveFn).toHaveBeenCalledTimes(2);
};
/**
@@ -80,16 +80,16 @@ const testExponentialBackoffInstanceRunUsesDefaultOnError = async (): Promise<vo
*/
const testExponentialBackoffSucceedsOnFirstAttempt = async (): Promise<void> => {
// Always resolves — never enters the catch/retry branch.
const fn = vi.fn(async () => 'success');
const resolveFn = vi.fn(async () => 'success');
const onError = vi.fn();
const result = await ExponentialBackoff.run(fn, onError, {
const result = await ExponentialBackoff.run(resolveFn, onError, {
baseDelay: 0,
jitter: 0,
});
expect(result).toBe('success');
expect(fn).toHaveBeenCalledOnce();
expect(resolveFn).toHaveBeenCalledOnce();
expect(onError).not.toHaveBeenCalled();
};
@@ -98,19 +98,19 @@ const testExponentialBackoffSucceedsOnFirstAttempt = async (): Promise<void> =>
*/
const testExponentialBackoffRetriesUntilSuccess = async (): Promise<void> => {
// Three invocations: two rejections then a success on the third call.
const fn = vi.fn().mockRejectedValueOnce(new Error('attempt 1'))
const tripleRejectFn = vi.fn().mockRejectedValueOnce(new Error('attempt 1'))
.mockRejectedValueOnce(new Error('attempt 2'))
.mockResolvedValueOnce('success');
// maxAttempts: 5 is high enough that we stop because fn succeeded, not because we hit the cap.
const result = await ExponentialBackoff.run(fn, () => {}, {
const result = await ExponentialBackoff.run(tripleRejectFn, () => {}, {
baseDelay: 0,
jitter: 0,
maxAttempts: 5,
});
expect(result).toBe('success');
expect(fn).toHaveBeenCalledTimes(3);
expect(tripleRejectFn).toHaveBeenCalledTimes(3);
};
/**
@@ -121,11 +121,11 @@ const testExponentialBackoffCallsOnErrorForEachFailure = async (): Promise<void>
const error = new Error('temporary failure');
// Always rejects with the same error — we will exhaust all attempts.
const fn = vi.fn().mockRejectedValue(error);
const rejectFn = vi.fn().mockRejectedValue(error);
const onError = vi.fn();
// maxAttempts: 3 means three tries total, all of which will fail.
await expect(ExponentialBackoff.run(fn, onError, {
await expect(ExponentialBackoff.run(rejectFn, onError, {
baseDelay: 0,
jitter: 0,
maxAttempts: 3,
@@ -144,11 +144,11 @@ const testExponentialBackoffThrowsMaxRetriesHitErrorWhenExhausted = async (): Pr
const lastError = new Error('last');
// Two distinct errors so we can prove both are collected, not just the last one.
const fn = vi.fn().mockRejectedValueOnce(firstError)
const doubleRejectFn = vi.fn().mockRejectedValueOnce(firstError)
.mockRejectedValueOnce(lastError);
try {
await ExponentialBackoff.run(fn, () => {}, {
await ExponentialBackoff.run(doubleRejectFn, () => {}, {
baseDelay: 0,
jitter: 0,
maxAttempts: 2,
@@ -159,7 +159,7 @@ const testExponentialBackoffThrowsMaxRetriesHitErrorWhenExhausted = async (): Pr
expect((error as ExponentialBackoffMaxRetriesHitError).cause).toEqual([ firstError, lastError ]);
}
expect(fn).toHaveBeenCalledTimes(2);
expect(doubleRejectFn).toHaveBeenCalledTimes(2);
};
/**
@@ -168,12 +168,12 @@ const testExponentialBackoffThrowsMaxRetriesHitErrorWhenExhausted = async (): Pr
*/
const testExponentialBackoffWrapsNonErrorThrows = async (): Promise<void> => {
// Reject with a plain string — not an Error subclass.
const fn = vi.fn().mockRejectedValue('not-an-error');
const rejectedFn = vi.fn().mockRejectedValue('not-an-error');
const onError = vi.fn();
// Single attempt — we fail fast and inspect what onError received.
try {
await ExponentialBackoff.run(fn, onError, {
await ExponentialBackoff.run(rejectedFn, onError, {
baseDelay: 0,
jitter: 0,
maxAttempts: 1,
@@ -196,7 +196,7 @@ const testExponentialBackoffWrapsNonErrorThrows = async (): Promise<void> => {
* as an alternative to the static helper.
*/
const testExponentialBackoffFromAndInstanceRun = async (): Promise<void> => {
const fn = vi.fn(async () => 42);
const successfullyResolve = vi.fn(async () => 42);
// from() is a convenience constructor; run() on the result should behave like the static path.
const backoff = ExponentialBackoff.from({
@@ -204,10 +204,10 @@ const testExponentialBackoffFromAndInstanceRun = async (): Promise<void> => {
jitter: 0,
});
const result = await backoff.run(fn);
const result = await backoff.run(successfullyResolve);
expect(result).toBe(42);
expect(fn).toHaveBeenCalledOnce();
expect(successfullyResolve).toHaveBeenCalledOnce();
};
/**
@@ -215,21 +215,21 @@ const testExponentialBackoffFromAndInstanceRun = async (): Promise<void> => {
*/
const testExponentialBackoffRetriesIndefinitelyWhenMaxAttemptsIsZero = async (): Promise<void> => {
// Four invocations: three failures then success — would exceed a cap of 3 if one existed.
const fn = vi
const tripleRejectThenResolveFn = vi
.fn()
.mockRejectedValueOnce(new Error('attempt 1'))
.mockRejectedValueOnce(new Error('attempt 2'))
.mockRejectedValueOnce(new Error('attempt 3'))
.mockResolvedValueOnce('eventually');
const result = await ExponentialBackoff.run(fn, () => {}, {
const result = await ExponentialBackoff.run(tripleRejectThenResolveFn, () => {}, {
baseDelay: 0,
jitter: 0,
maxAttempts: 0,
});
expect(result).toBe('eventually');
expect(fn).toHaveBeenCalledTimes(4);
expect(tripleRejectThenResolveFn).toHaveBeenCalledTimes(4);
};
/**
@@ -241,13 +241,13 @@ const testExponentialBackoffIncreasesDelayExponentially = async (): Promise<void
vi.spyOn(Math, 'random').mockReturnValue(0.5);
try {
const fn = vi
const doubleRejectThenResolveFn = vi
.fn()
.mockRejectedValueOnce(new Error('attempt 1'))
.mockRejectedValueOnce(new Error('attempt 2'))
.mockResolvedValueOnce('success');
const promise = ExponentialBackoff.run(fn, () => {}, {
const promise = ExponentialBackoff.run(doubleRejectThenResolveFn, () => {}, {
baseDelay: 100,
growthRate: 2,
jitter: 0,
@@ -257,15 +257,15 @@ const testExponentialBackoffIncreasesDelayExponentially = async (): Promise<void
// Attempt 0 fires synchronously on the first microtask tick.
await Promise.resolve();
expect(fn).toHaveBeenCalledTimes(1);
expect(doubleRejectThenResolveFn).toHaveBeenCalledTimes(1);
// After attempt 0 fails, delay = 100 * 2^0 = 100ms before attempt 1.
await vi.advanceTimersByTimeAsync(100);
expect(fn).toHaveBeenCalledTimes(2);
expect(doubleRejectThenResolveFn).toHaveBeenCalledTimes(2);
// After attempt 1 fails, delay = 100 * 2^1 = 200ms before attempt 2.
await vi.advanceTimersByTimeAsync(200);
expect(fn).toHaveBeenCalledTimes(3);
expect(doubleRejectThenResolveFn).toHaveBeenCalledTimes(3);
await expect(promise).resolves.toBe('success');
} finally {
@@ -282,13 +282,13 @@ const testExponentialBackoffCapsDelayAtMaxDelay = async (): Promise<void> => {
vi.spyOn(Math, 'random').mockReturnValue(0.5);
try {
const fn = vi
const doubleRejectThenResolveFn = vi
.fn()
.mockRejectedValueOnce(new Error('attempt 1'))
.mockRejectedValueOnce(new Error('attempt 2'))
.mockResolvedValueOnce('success');
const promise = ExponentialBackoff.run(fn, () => {}, {
const promise = ExponentialBackoff.run(doubleRejectThenResolveFn, () => {}, {
baseDelay: 1_000,
growthRate: 4,
jitter: 0,
@@ -297,15 +297,15 @@ const testExponentialBackoffCapsDelayAtMaxDelay = async (): Promise<void> => {
});
await Promise.resolve();
expect(fn).toHaveBeenCalledTimes(1);
expect(doubleRejectThenResolveFn).toHaveBeenCalledTimes(1);
// attempt 0: 1000 * 4^0 = 1000ms, below the 2000ms cap.
await vi.advanceTimersByTimeAsync(1_000);
expect(fn).toHaveBeenCalledTimes(2);
expect(doubleRejectThenResolveFn).toHaveBeenCalledTimes(2);
// attempt 1: uncapped would be 4000ms but maxDelay clamps to 2000ms.
await vi.advanceTimersByTimeAsync(2_000);
expect(fn).toHaveBeenCalledTimes(3);
expect(doubleRejectThenResolveFn).toHaveBeenCalledTimes(3);
await expect(promise).resolves.toBe('success');
} finally {
@@ -323,10 +323,10 @@ const testExponentialBackoffAppliesJitter = async (): Promise<void> => {
vi.spyOn(Math, 'random').mockReturnValue(1);
try {
const fn = vi.fn().mockRejectedValueOnce(new Error('attempt 1'))
const rejectThenResolveFn = vi.fn().mockRejectedValueOnce(new Error('attempt 1'))
.mockResolvedValueOnce('success');
const promise = ExponentialBackoff.run(fn, () => {}, {
const promise = ExponentialBackoff.run(rejectThenResolveFn, () => {}, {
baseDelay: 1_000,
growthRate: 1,
jitter: 0.1,
@@ -335,14 +335,14 @@ const testExponentialBackoffAppliesJitter = async (): Promise<void> => {
});
await Promise.resolve();
expect(fn).toHaveBeenCalledTimes(1);
expect(rejectThenResolveFn).toHaveBeenCalledTimes(1);
// Advancing 899ms is one ms short of the jittered delay; 900ms triggers the retry.
await vi.advanceTimersByTimeAsync(899);
expect(fn).toHaveBeenCalledTimes(1);
expect(rejectThenResolveFn).toHaveBeenCalledTimes(1);
await vi.advanceTimersByTimeAsync(1);
expect(fn).toHaveBeenCalledTimes(2);
expect(rejectThenResolveFn).toHaveBeenCalledTimes(2);
await expect(promise).resolves.toBe('success');
} finally {