go test helps improve code robustness

Abstract: The go test toolkit improves the robustness of Go code. It includes the following functionality: Run tests via the go test command. Write test functions using the format func TestName(t *testing.T). Use assertion functions such as t.Equal(), t.NotEqual(), t.True(), t.False() to verify test results. Find bugs and improve code robustness by running go test.

Go Test helps improve code robustness

Introduction

In the Go language, go test contains a powerful set of tools for testing code to ensure its robustness. This article will delve into go test and demonstrate its usage in practical cases.

Installation

Install via command linego test:

go install golang.org/x/tools/cmd/goimports

Basic usage

go test is used to test code packages or functions. To run tests, run the following command in the directory containing the test files:

go test

This command will run all tests in files ending with _test.go.

Writing tests

Go test functions follow a specific format:

func TestName(t *testing.T) {
  // 测试代码
}

Where:

• ##TestName is the name of the test function
• t is the testing.T type, used to record information to the test log and assert whether the test passed

Assertions

Assertions are used to verify test results.

testing The package provides a variety of assertion functions, as follows:

• t.Equal(a, b): Assertiona and b are equal
• t.NotEqual(a, b): Assert that a and b are not equal
• t.True(x): Assert that x is true
• t.False(x): Assert that x False

Practical case

Sample code:

This code is used to check the length of a string Is it greater than 10 characters.

package main

import (
  "testing"
)

func checkLength(str string) bool {
  return len(str) > 10
}

func TestCheckLength(t *testing.T) {
  tests := []struct {
    input string
    want bool
  }{
    {"abcdefg", false},
    {"abcdefghijklmno", true},
  }

  for _, test := range tests {
    got := checkLength(test.input)
    if got != test.want {
      t.Errorf("checkLength(%q) = %v, want %v", test.input, got, test.want)
    }
  }
}

func main() {
  testing.Main()
}

Test run:

go test ./path/to/file_name_test.go

Output:

PASS
ok      ./path/to/file_name_test.go  0.002s

Conclusion

By using

go test, you can easily write and run tests to find defects at an early stage and improve code robustness.

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