Files
bun.sh/test/js/bun
robobun ddd4018bda Improve snapshot error messages in CI environments (#23419)
## Summary

This PR improves snapshot error messages when running tests in CI
environments to make debugging easier by showing exactly what snapshot
was being created and what value was attempted.

## Changes

### 1. Inline Snapshot Errors
**Before:**
```
Updating inline snapshots is disabled in CI environments unless --update-snapshots is used.
```

**After:**
```
Inline snapshot creation is not allowed in CI environments unless --update-snapshots is used.
If this is not a CI environment, set the environment variable CI=false to force allow.

Received: this is new
```

- Changed message to say "creation" instead of "updating" (more
accurate)
- Shows the received value that was attempted using Jest's pretty
printer

### 2. Snapshot File Errors
**Before:**
```
Snapshot creation is not allowed in CI environments unless --update-snapshots is used
If this is not a CI environment, set the environment variable CI=false to force allow.

Received: this is new
```

**After:**
```
Snapshot creation is not allowed in CI environments unless --update-snapshots is used
If this is not a CI environment, set the environment variable CI=false to force allow.

Snapshot name: "new snapshot 1"
Received: this is new
```

- Now shows the snapshot name that was being looked for
- Shows the received value using Jest's pretty printer

## Implementation Details

- Added `last_error_snapshot_name` field to `Snapshots` struct to pass
snapshot name from `getOrPut()` to error handler
- Removed unreachable code path for inline snapshot updates (mismatches
error earlier with diff)
- Updated test expectations in `ci-restrictions.test.ts`

## Test Plan

```bash
# Test inline snapshot creation in CI
cd /tmp/snapshot-test
echo 'import { test, expect } from "bun:test";
test("new inline snapshot", () => {
  expect("this is new").toMatchInlineSnapshot();
});' > test.js
GITHUB_ACTIONS=1 bun test test.js

# Test snapshot file creation in CI
echo 'import { test, expect } from "bun:test";
test("new snapshot", () => {
  expect("this is new").toMatchSnapshot();
});' > test2.js
GITHUB_ACTIONS=1 bun test test2.js
```

Both should show improved error messages with the received values and
snapshot name.

---------

Co-authored-by: Claude Bot <claude-bot@bun.sh>
Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: pfg <pfg@pfg.pw>
2025-10-29 15:55:41 -07:00
..
2025-09-25 16:24:24 -07:00
2025-05-26 21:18:22 -07:00
2025-01-17 22:08:07 -08:00
2024-12-27 14:07:41 -08:00