How to use gomega for assertions in Golang unit tests?-Golang-php.cn

How to use gomega for assertions in Golang unit tests?

王林

Release： 2024-06-05 22:48:59

Original

570 people have browsed it

如何在 Golang 单元测试中使用 gomega 进行断言？

How to use Gomega for assertions in Golang unit testing

In Golang unit testing, Gomega is a popular and powerful assertion library , which provides rich assertion methods so that developers can easily verify test results.

Installing Gomega

go get -u github.com/onsi/gomega

Copy after login

Using Gomega for assertions
Here are some common examples of using Gomega for assertions:

1. Equality assertion

import "github.com/onsi/gomega"

func Test_MyFunction(t *testing.T) {
    gomega.RegisterTestingT(t)

    actual := MyFunction()
    gomega.Expect(actual).To(gomega.Equal(5))
}

Copy after login

2. Inequality assertion

import "github.com/onsi/gomega"

func Test_MyFunction(t *testing.T) {
    gomega.RegisterTestingT(t)

    actual := MyFunction()
    gomega.Expect(actual).NotTo(gomega.Equal(5))
}

Copy after login

3. Truth assertion

import "github.com/onsi/gomega"

func Test_MyFunction(t *testing.T) {
    gomega.RegisterTestingT(t)

    actual := MyFunction()
    gomega.Expect(actual).To(gomega.BeTrue())
}

Copy after login

4. Pointer equality assertion

import "github.com/onsi/gomega"

func Test_MyFunction(t *testing.T) {
    gomega.RegisterTestingT(t)

    actual := &MyStruct{}
    expected := &MyStruct{}
    gomega.Expect(actual).To(gomega.PointTo(expected))
}

Copy after login

5. Failed assertion

import "github.com/onsi/gomega"

func Test_MyFunction(t *testing.T) {
    gomega.RegisterTestingT(t)

    actual := MyFunction()
    gomega.Expect(actual).To(gomega.Equal(6), "Unexpected value")
}

Copy after login

Practical case
Suppose we have a function ComputeSum that calculates the sum of two numbers. We can use Gomega to write the following unit tests:

func Test_ComputeSum(t *testing.T) {
    gomega.RegisterTestingT(t)

    actual := ComputeSum(2, 3)
    gomega.Expect(actual).To(gomega.Equal(5))
}

Copy after login

Using Gomega allows us to easily verify test results and improve the reliability of unit tests.

The above is the detailed content of How to use gomega for assertions in Golang unit tests?. For more information, please follow other related articles on the PHP Chinese website!