Questions tagged [go-cmp]

go-cmp is a library for comparing values. Due to performance trade-offs, it is best suited for non-production code, like unit tests. go-cmp can make it easier to computing diffs and compare values that aren't directly comparable with == and != as per the Go spec.

Useful links:

• Package documentation: https://pkg.go.dev/github.com/google/go-cmp
• Project repository: https://github.com/google/go-cmp

Basic example:

package main

import (
    "fmt"

    "github.com/google/go-cmp/cmp"
)

type Foo struct {
    Name   string
    Values []int
}

func main() {
    a := Foo{"Foo1", []int{1, 2, 3}}
    b := Foo{"Foo1", []int{1, 2, 3}}
    c := Foo{"Foo1", []int{1, 2, 5}}

    fmt.Println("is a equal to b?", cmp.Equal(a, b)) // true
    fmt.Println("is b equal to c?", cmp.Equal(b, c)) // false
}