framework/assert/error_test.go

// Copyright (C) 2016 The Android Open Source Project
//
// 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 assert_test

import (
	"errors"

	"android.googlesource.com/platform/tools/gpu/framework/assert"
)

// An example of testing errors
func ExampleErrors() {
	ctx := assert.Context(nil)
	err := errors.New("failure")
	otherErr := errors.New("other failure")
	assert.For(ctx, "nil succeeded").ThatError(nil).Succeeded()
	assert.For(ctx, "nil failed").ThatError(nil).Failed()
	assert.For(ctx, "err succeeded").ThatError(err).Succeeded()
	assert.For(ctx, "err failed").ThatError(err).Failed()
	assert.For(ctx, "err equals").ThatError(err).Equals(err)
	assert.For(ctx, "err not equals").ThatError(err).Equals(otherErr)
	assert.For(ctx, "err deep equals").ThatError(err).DeepEquals(err)
	assert.For(ctx, "err deep not equals").ThatError(err).DeepEquals(otherErr)
	assert.For(ctx, "message").ThatError(err).HasMessage(err.Error())
	assert.For(ctx, "wrong message").ThatError(err).HasMessage(otherErr.Error())
	// Output:
	// Error:nil failed
	//     Got:      nil
	//     Expected: failure
	// Error:err succeeded
	//     Got:      failure
	//     Expected: success
	// Error:err not equals
	//     Got:      failure
	//     Expected: other failure
	// Error:err deep not equals
	//     Got:      failure
	//     Expected: other failure
	// Error:wrong message
	//     Got:      failure
	//     Expected: other failure
}