Package Assert & Require

Package assert dan require merupakan package bawaan dari github.com/stretchr/testify yang memiliki beberapa fungsi yang dapat digunakan untuk pengecekan expected result dan real result dari suatu fungsi yang di test. Untuk instalasi package testify tertera pada link berikut https://github.com/stretchr/testify atau bisa menggunakan command berikut.

go get github.com/stretchr/testify

Pada setiap akhir fungsi di package assert akan memanggil method Fail() dari package testing, artinya eksekusi unit test akan tetap dilanjutkan meskipun suatu unit testing dianggap gagal.

Pada setiap akhir fungsi di package require akan memanggil method FailNow() dari package testing, artinya eksekusi unit test tidak akan dilanjutkan saat suatu unit testing telah gagal.

Contoh code penggunaan fungsi Equal() dari package assertion dan require di unit testing

main.go

package main

import (
	"fmt"
)

func main() {
	result := SayHi("Utsman")
	fmt.Println(result)
}

func SayHi(name string) string {
	return "Hello " + name
}

main_test.go

package main

import (
	"testing"
	"github.com/stretchr/testify/assert"
)

func TestSayHi(t *testing.T) {
	expectedResult := "Hello Andi"
	t.Run("Test-1", func(t *testing.T) {
		result := SayHi("Amar")
		assert.Equal(t, expectedResult, result)
	})
	t.Run("Test-2", func(t *testing.T) {
		result := SayHi("Andi")
		assert.Equal(t, expectedResult, result)
	})
	t.Run("Test-3", func(t *testing.T) {
		result := SayHi("Umar")
		assert.Equal(t, expectedResult, result)
	})
}

PS D:\bootcamp-go\go-unit-test> go test -v -run TestSayHi
=== RUN   TestSayHi
=== RUN   TestSayHi/Test-1
    main_test.go:11:
                Error Trace:    D:/bootcamp-go/go-unit-test/main_test.go:11
                Error:          Not equal:
                                expected: "Hello Andi"
                                actual  : "Hello Amar"

                                Diff:
                                --- Expected
                                +++ Actual
                                @@ -1 +1 @@
                                -Hello Andi
                                +Hello Amar
                Test:           TestSayHi/Test-1
=== RUN   TestSayHi/Test-2
=== RUN   TestSayHi/Test-3
    main_test.go:19:
                Error Trace:    D:/bootcamp-go/go-unit-test/main_test.go:19
                Error:          Not equal:
                                expected: "Hello Andi"
                                actual  : "Hello Umar"

                                Diff:
                                --- Expected
                                +++ Actual
                                @@ -1 +1 @@
                                -Hello Andi
                                +Hello Umar
                Test:           TestSayHi/Test-3
--- FAIL: TestSayHi (0.01s)
    --- FAIL: TestSayHi/Test-1 (0.00s)
    --- PASS: TestSayHi/Test-2 (0.00s)
    --- FAIL: TestSayHi/Test-3 (0.00s)
FAIL
exit status 1
FAIL    unit-testing    0.395s

package main

import (
	"testing"
	"github.com/stretchr/testify/require"
)

func TestSayHi(t *testing.T) {
	expectedResult := "Hello Andi"
	t.Run("Test-1", func(t *testing.T) {
		result := SayHi("Amar")
		require.Equal(t, expectedResult, result, "Input Not Andi")
	})
	t.Run("Test-2", func(t *testing.T) {
		result := SayHi("Andi")
		require.Equal(t, expectedResult, result, "Input Andi")
	})
	t.Run("Test-3", func(t *testing.T) {
		result := SayHi("Dawam")
		require.Equal(t, expectedResult, result, "Input Not Andi")
	})
}

PS D:\bootcamp-go\go-unit-test> go test -v -run TestSayHi
=== RUN   TestSayHi
=== RUN   TestSayHi/Test-1
    main_test.go:11:
                Error Trace:    D:/bootcamp-go/go-unit-test/main_test.go:11
                Error:          Not equal:
                                expected: "Hello Andi"
                                actual  : "Hello Amar"

                                Diff:
                                --- Expected
                                +++ Actual
                                @@ -1 +1 @@
                                -Hello Andi
                                +Hello Amar
                Test:           TestSayHi/Test-1
                Messages:       Input Not Andi
=== RUN   TestSayHi/Test-2
=== RUN   TestSayHi/Test-3
    main_test.go:19:
                Error Trace:    D:/bootcamp-go/go-unit-test/main_test.go:19
                Error:          Not equal:
                                expected: "Hello Andi"
                                actual  : "Hello Umar"

                                Diff:
                                --- Expected
                                +++ Actual
                                @@ -1 +1 @@
                                -Hello Andi
                                +Hello Umar
                Test:           TestSayHi/Test-3
                Messages:       Input Not Andi
--- FAIL: TestSayHi (0.01s)
    --- FAIL: TestSayHi/Test-1 (0.00s)
    --- PASS: TestSayHi/Test-2 (0.00s)
    --- FAIL: TestSayHi/Test-3 (0.01s)
FAIL
exit status 1
FAIL    unit-testing    0.499s