kotlin-node/node.test/TestContextAssert/snapshot

snapshot

abstract fun snapshot(value: Any?, options: AssertSnapshotOptions = definedExternally)(source)

This function implements assertions for snapshot testing.

test('snapshot test with default serialization', (t) => {
  t.assert.snapshot({ value1: 1, value2: 2 });
});

test('snapshot test with custom serialization', (t) => {
  t.assert.snapshot({ value3: 3, value4: 4 }, {
    serializers: [(value) => JSON.stringify(value)]
  });
});

Since

v22.3.0

Parameters

value

A value to serialize to a string. If Node.js was started with the --test-update-snapshots flag, the serialized value is written to the snapshot file. Otherwise, the serialized value is compared to the corresponding value in the existing snapshot file.