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// Copyright 2017 Google Inc. All Rights Reserved.
//
// 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 testutil
import (
"math"
"github.com/golang/protobuf/proto"
"github.com/google/go-cmp/cmp"
)
var (
alwaysEqual = cmp.Comparer(func(_, _ interface{}) bool { return true })
defaultCmpOptions = []cmp.Option{
// Use proto.Equal for protobufs
cmp.Comparer(proto.Equal),
// NaNs compare equal
cmp.FilterValues(func(x, y float64) bool {
return math.IsNaN(x) && math.IsNaN(y)
}, alwaysEqual),
cmp.FilterValues(func(x, y float32) bool {
return math.IsNaN(float64(x)) && math.IsNaN(float64(y))
}, alwaysEqual),
}
)
// Equal tests two values for equality.
func Equal(x, y interface{}, opts ...cmp.Option) bool {
// Put default options at the end. Order doesn't matter.
opts = append(opts[:len(opts):len(opts)], defaultCmpOptions...)
return cmp.Equal(x, y, opts...)
}
// Diff reports the differences between two values.
// Diff(x, y) == "" iff Equal(x, y).
func Diff(x, y interface{}, opts ...cmp.Option) string {
// Put default options at the end. Order doesn't matter.
opts = append(opts[:len(opts):len(opts)], defaultCmpOptions...)
return cmp.Diff(x, y, opts...)
}
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