✨ Implement Handler and HandlerFunc, add comprehensive tests

handler_test.go

@@ -1 +1,48 @@
 package ezhandler_test
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"codeberg.org/danjones000/ezhandler"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestHandlerFunc_ServeHTTP(t *testing.T) {
+	tests := []struct {
+		name        string
+		handlerFunc ezhandler.HandlerFunc
+		expectedErr error
+	}{
+		{
+			name: "no error",
+			handlerFunc: ezhandler.HandlerFunc(func(w http.ResponseWriter, r *http.Request) error {
+				w.WriteHeader(http.StatusOK)
+				return nil
+			}),
+			expectedErr: nil,
+		},
+		{
+			name: "with error",
+			handlerFunc: ezhandler.HandlerFunc(func(w http.ResponseWriter, r *http.Request) error {
+				return errTest
+			}),
+			expectedErr: errTest,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			req := httptest.NewRequest(http.MethodGet, "/", http.NoBody)
+			rec := httptest.NewRecorder()
+
+			err := tt.handlerFunc.ServeHTTP(rec, req)
+			if tt.expectedErr != nil {
+				assert.Equal(t, tt.expectedErr, err)
+			} else {
+				assert.NoError(t, err)
+			}
+		})
+	}
+}