Skip to content

Commit

Permalink
docs(snapshot): inline snapshots can be used without prettier (jestjs…
Browse files Browse the repository at this point in the history
  • Loading branch information
jeysal authored and mprinc committed May 9, 2021
1 parent d816b95 commit a4d745d
Showing 1 changed file with 4 additions and 8 deletions.
12 changes: 4 additions & 8 deletions docs/SnapshotTesting.md
Expand Up @@ -99,18 +99,14 @@ Once you're finished, Jest will give you a summary before returning back to watc

Inline snapshots behave identically to external snapshots (`.snap` files), except the snapshot values are written automatically back into the source code. This means you can get the benefits of automatically generated snapshots without having to switch to an external file to make sure the correct value was written.

> Inline snapshots are powered by [Prettier](https://prettier.io). To use inline snapshots you must have `prettier` installed in your project. Your Prettier configuration will be respected when writing to test files.
>
> If you have `prettier` installed in a location where Jest can't find it, you can tell Jest how to find it using the [`"prettierPath"`](./Configuration.md#prettierpath-string) configuration property.
**Example:**

First, you write a test, calling `.toMatchInlineSnapshot()` with no arguments:

```tsx
it('renders correctly', () => {
const tree = renderer
.create(<Link page="https://prettier.io">Prettier</Link>)
.create(<Link page="https://example.com">Example Site</Link>)
.toJSON();
expect(tree).toMatchInlineSnapshot();
});
Expand All @@ -121,16 +117,16 @@ The next time you run Jest, `tree` will be evaluated, and a snapshot will be wri
```tsx
it('renders correctly', () => {
const tree = renderer
.create(<Link page="https://prettier.io">Prettier</Link>)
.create(<Link page="https://example.com">Example Site</Link>)
.toJSON();
expect(tree).toMatchInlineSnapshot(`
<a
className="normal"
href="https://prettier.io"
href="https://example.com"
onMouseEnter={[Function]}
onMouseLeave={[Function]}
>
Prettier
Example Site
</a>
`);
});
Expand Down

0 comments on commit a4d745d

Please sign in to comment.