go/src/internal/trace/testtrace/expectation.go

type Expectation …

// ExpectSuccess returns an Expectation that trivially expects success.
func ExpectSuccess() *Expectation { … }

// Check validates whether err conforms to the expectation. Returns
// an error if it does not conform.
//
// Conformance means that if failure is true, then err must be non-nil.
// If err is non-nil, then it must match errorMatcher.
func (e *Expectation) Check(err error) error { … }

// ParseExpectation parses the serialized form of an Expectation.
func ParseExpectation(data []byte) (*Expectation, error) { … }

func parseMatcher(quoted string) (*regexp.Regexp, error) { … }