mirror of
https://gitlab.com/ric_harvey/MailHog.git
synced 2024-11-28 00:34:04 +00:00
86 lines
3.6 KiB
Go
86 lines
3.6 KiB
Go
// Copyright 2011 Aaron Jacobs. All Rights Reserved.
|
|
// Author: aaronjjacobs@gmail.com (Aaron Jacobs)
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
// Package oglematchers provides a set of matchers useful in a testing or
|
|
// mocking framework. These matchers are inspired by and mostly compatible with
|
|
// Google Test for C++ and Google JS Test.
|
|
//
|
|
// This package is used by github.com/smartystreets/assertions/internal/ogletest and
|
|
// github.com/smartystreets/assertions/internal/oglemock, which may be more directly useful if you're not
|
|
// writing your own testing package or defining your own matchers.
|
|
package oglematchers
|
|
|
|
// A Matcher is some predicate implicitly defining a set of values that it
|
|
// matches. For example, GreaterThan(17) matches all numeric values greater
|
|
// than 17, and HasSubstr("taco") matches all strings with the substring
|
|
// "taco".
|
|
//
|
|
// Matchers are typically exposed to tests via constructor functions like
|
|
// HasSubstr. In order to implement such a function you can either define your
|
|
// own matcher type or use NewMatcher.
|
|
type Matcher interface {
|
|
// Check whether the supplied value belongs to the the set defined by the
|
|
// matcher. Return a non-nil error if and only if it does not.
|
|
//
|
|
// The error describes why the value doesn't match. The error text is a
|
|
// relative clause that is suitable for being placed after the value. For
|
|
// example, a predicate that matches strings with a particular substring may,
|
|
// when presented with a numerical value, return the following error text:
|
|
//
|
|
// "which is not a string"
|
|
//
|
|
// Then the failure message may look like:
|
|
//
|
|
// Expected: has substring "taco"
|
|
// Actual: 17, which is not a string
|
|
//
|
|
// If the error is self-apparent based on the description of the matcher, the
|
|
// error text may be empty (but the error still non-nil). For example:
|
|
//
|
|
// Expected: 17
|
|
// Actual: 19
|
|
//
|
|
// If you are implementing a new matcher, see also the documentation on
|
|
// FatalError.
|
|
Matches(candidate interface{}) error
|
|
|
|
// Description returns a string describing the property that values matching
|
|
// this matcher have, as a verb phrase where the subject is the value. For
|
|
// example, "is greather than 17" or "has substring "taco"".
|
|
Description() string
|
|
}
|
|
|
|
// FatalError is an implementation of the error interface that may be returned
|
|
// from matchers, indicating the error should be propagated. Returning a
|
|
// *FatalError indicates that the matcher doesn't process values of the
|
|
// supplied type, or otherwise doesn't know how to handle the value.
|
|
//
|
|
// For example, if GreaterThan(17) returned false for the value "taco" without
|
|
// a fatal error, then Not(GreaterThan(17)) would return true. This is
|
|
// technically correct, but is surprising and may mask failures where the wrong
|
|
// sort of matcher is accidentally used. Instead, GreaterThan(17) can return a
|
|
// fatal error, which will be propagated by Not().
|
|
type FatalError struct {
|
|
errorText string
|
|
}
|
|
|
|
// NewFatalError creates a FatalError struct with the supplied error text.
|
|
func NewFatalError(s string) *FatalError {
|
|
return &FatalError{s}
|
|
}
|
|
|
|
func (e *FatalError) Error() string {
|
|
return e.errorText
|
|
}
|