How to implement unit tests in Go using the testing package?

To implement unit tests in Go using the testing package, follow these steps:

Create a new Go file with the _test.go suffix. For example, if you have a file called myfunc.go, create a new file called myfunc_test.go.
Import the testing package along with the package containing the functions you want to test. For example:

import (
    "testing"
    "mypackage"
)

Create test functions that start with the word Test followed by a descriptive name. For example:

func TestAdd(t *testing.T) {
    // Test code goes here
}

func TestMultiply(t *testing.T) {
    // Test code goes here
}

Inside each test function, use the t argument of type *testing.T to perform assertions. For example:

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

You can use various assertion functions provided by the testing package, such as t.Errorf, t.Fatalf, t.Log, etc., to check if the expected conditions are met.

Run the tests by executing the go test command in the terminal. For example, to run all the tests in the current package, navigate to the directory containing the test file and execute go test. The output will indicate which tests passed or failed.

That's it! By following these steps, you can implement unit tests in Go using the testing package.