go test: a powerful assist for test cases

The go test tool can be used to write and run test cases in Go programming to ensure code correctness and robustness: Run test cases: Use "go test" from the command line. Write test cases: Use the Test function named "TestXxx". Run all test cases: use "go test -v". Practical case: Example of verifying string equality. Extended functionality: benchmarks, sample tests, table-driven tests, and custom runners.

go test: a powerful assist for test cases

In Go programming, testing is a very important link,## The #go test tool provides powerful functionality to write and run test cases to ensure the correctness and robustness of the code.

Use go test

Using go test is very simple, just run the following command in the command line:

go test

This command will be Search for .go files in the current directory and run the test cases in them.

Writing test cases

Test cases in Go are usually written using the

Test function in the testing package. Test Functions are named in the form TestXxx, where Xxx is the name of the test case.

import "testing"

func TestAdd(t *testing.T) {
    result := Add(1, 2)
    if result != 3 {
        t.Errorf("Add(1, 2) = %d, expected 3", result)
    }
}

Run test cases

To run all test cases, you can execute the following command:

go test -v

-v The options will be displayed Details for each test case.

Practical case

The following is a practical case using go test to verify string equality:

import "testing"

func TestStringEqual(t *testing.T) {
    str1 := "hello"
    str2 := "hello"

    if str1 != str2 {
        t.Errorf("Expected str1 and str2 to be equal, got %s and %s", str1, str2)
    }
}

Extended functions

Benchmark: Use the BenchmarkXxx function for performance benchmarking.

Example test: Using the ExampleXxx function provides code usage examples.

Table-driven testing: Use the testdata folder to provide test data.

Custom Runner: Create a custom test runner to handle special testing needs.

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