Golang测试中错误断言与处理技巧

testing

testing

t.Errorf

t.Fatalf

t.Errorf

t.Fatalf

t.Errorf

t.Fatalf

Add

func TestAdd(t *testing.T) {
    result := Add(2, 3)
    expected := 5
    if result != expected {
        t.Errorf("Add(2, 3) = %d, expected %d", result, expected)
    }
}

Add

func TestAddWithError(t *testing.T) {
    result, err := AddWithOverflowCheck(math.MaxInt64, 1)
    if err == nil {
        t.Fatalf("Expected error, but got nil")
    }

    if !errors.Is(err, ErrOverflow) { // 假设定义了ErrOverflow
        t.Errorf("Expected ErrOverflow, but got %v", err)
    }

    // 还可以检查错误信息是否符合预期
    if err.Error() != "integer overflow" {
        t.Errorf("Unexpected error message: %s", err.Error())
    }

    // 如果没有错误，则检查结果是否符合预期
    result, err = AddWithOverflowCheck(2, 3)
    if err != nil {
        t.Fatalf("Unexpected error: %v", err)
    }
    expected := 5
    if result != expected {
        t.Errorf("AddWithOverflowCheck(2, 3) = %d, expected %d", result, expected)
    }
}

errors.Is

t.Errorf("Something went wrong")

t.Errorf("Add(%d, %d) = %d, expected %d", a, b, result, expected)

t.Errorf("Add failed")

testify

sync.WaitGroup

testing.B

go test -race

sync.Mutex

go tool pprof

func BenchmarkAdd(b *testing.B) {
    for i := 0; i < b.N; i++ {
        Add(1, 1) // 假设 Add 函数没有副作用
    }
}

Add

go test -cover