Unit Testing

    This is the test file. It should be placed in the same directory as
    your application and name main_test.go.

    1. package main
    3. import (
    4.     "net/http"
    5.     "net/http/httptest"
    6.     "testing"
    8. func Test_HelloWorld(t *testing.T) {
    9.     req, err := http.NewRequest("GET", "http://example.com/foo", nil)
    10.     if err != nil {
    11.         t.Fatal(err)
    12.     }
    15.     HelloWorld(res, req)
    16.     exp := "Hello World"
    17.     act := res.Body.String()
    18.     if exp != act {
    19.         t.Fatalf("Expected %s gog %s", exp, act)
    20.     }
    1. Change the output of HelloWorld to print a parameter and then test that the parameter is rendered.
    2. Create a POST request and test that the request is properly handled.