package main import ( "io" "net/http" "net/http/httptest" "testing" "github.com/stretchr/testify/assert" ) func TestServeHTTP(t *testing.T) { assert := assert.New(t) plugin := Plugin{} w := httptest.NewRecorder() r := httptest.NewRequest(http.MethodGet, "/", nil) plugin.ServeHTTP(nil, w, r) result := w.Result() assert.NotNil(result) defer result.Body.Close() bodyBytes, err := io.ReadAll(result.Body) assert.Nil(err) bodyString := string(bodyBytes) assert.Equal("Hello, world!", bodyString) }