Function toHaveKey

toHaveKey(
    this: Readonly<MatcherState>,
    received: unknown,
    expectedKey: unknown,
    expectedValue?: unknown,
): SyncExpectationResult
Matcher that checks if a Map contains the given key.
Parameters
- this: Readonly<MatcherState>
- received: unknown
  The received value. Should be a Map
- expectedKey: unknown
  The key whose inclusion is being checked
- OptionalexpectedValue: unknown
  The desired value for the given key-value pair; if omitted, will only check that the given key exists (disregarding its value)
Returns SyncExpectationResult
Whether the matcher passed
- Defined in test/matchers/to-have-key.ts:13