Unit Test - Golang

Hamdi Ahmadi Muzakkiy

Outline

• TDD
• Why ?
• Interface{}
• Basic Example Unit Test
• Complex Example Unit Test

TDD

Test Driven Development

add test

watch test fail

coding

run test

refactor

Disadvantage

• Make Development Slower

WHY ?

• Faster Code For Future

• Faster To Debug Code

• Make More Confident

• Maintainable, Flexible, Easily Extensible

Interface{}

type Animal interface{
    RunSpeed() int
}

type Tiger struct {
    Name string
    TailLength float64
    Foot int
}

type Snake struct {
    Name string
    ColorSkin string
}

func (t Tiger) RunSpeed() int {
    return 100
}

func (s Snake) RunSpeed() int {
    return 20
}

Basic Example Unit Test

func Plus(a, b int) int {
	return a + b
}

func TestPlus(t *testing.T) {
	assert.Equal(t, 4, Plus(1, 3), "TestPlus Should be a + b")
}

Results

PASS
coverage: 38.9% of statements
ok  	github.com/hamdimuzakkiy/golang	0.003s

--- FAIL: TestPlus (0.00s)
        Error Trace:    utils_test.go:27
	Error:		Not equal: 
			expected: 8
			received: 4
	Messages:	ReverseString
		
FAIL
coverage: 38.9% of statements
exit status 1
FAIL	github.com/hamdimuzakkiy/golang	0.004s

Complex

func GetPerson(d DbInterfaceGet) Person {
	q := `	SELECT 
				name,
				age
			FROM
				PERSON
			LIMIT 1
	`
	var p Person
	d.Get(&p, q)
	p.Age *= 10
	return p
}

func DoSomethingWithInsert() {
	s := sqlx.DB{}
	GetPerson(&s)
}

https://github.com/hamdimuzakkiy/unit-test-golang

Thank You