toMatchTextFile

Asserts that a string value matches a text file snapshot. The string is trimmed and compared to a stored validation file.

Usage

test("value is expected value", () => {
  expect("expected value").toMatchTextFile();
});

Output (value_is_expected_value.txt):

expected value

Custom File Extension

Use fileExtension to store snapshots with a different file extension:

test("html snapshot", () => {
  expect("<main>Hello World</main>").toMatchTextFile({ fileExtension: "html" });
});

Output (html_snapshot.html):

<main>Hello World</main>

Options

Option	Default Value	Description
fileExtension	txt	File extension used for storing the snapshot file.
name	undefined	Unique name of the file snapshot. Used to distinguish multiple file snapshots within the same test. See Named Snapshots.
normalizers	[]	Custom normalizers to apply before serialization. See Normalization of Snapshots.
resolveFilePath	resolveNameAsFile	Custom resolver for the file path used to store snapshots.