Improving tests by handling multiple test cases

internal/handlers/handlers.go

@@ -80,13 +80,15 @@ func (m *Repository) MakeReservation(w http.ResponseWriter, r *http.Request) {
 	// filled with the info when sent back.
 	res, ok := m.App.Session.Get(r.Context(), "reservation").(models.Reservation)
 	if !ok {
-		helpers.ServerError(w, errors.New("cannot get reservation from session"))
+		m.App.Session.Put(r.Context(), "error", "can't get reservation from session")
+		http.Redirect(w, r, "/", http.StatusTemporaryRedirect)
 		return
 	}
 
 	room, err := m.DB.GetRoomById(res.RoomID)
 	if err != nil {
-		helpers.ServerError(w, err)
+		m.App.Session.Put(r.Context(), "error", "can't find room")
+		http.Redirect(w, r, "/", http.StatusTemporaryRedirect)
 		return
 	}
 

internal/handlers/handlers_test.go

@@ -6,7 +6,6 @@ import (
 	"log"
 	"net/http"
 	"net/http/httptest"
-	"net/url"
 	"testing"
 )
 
@@ -19,16 +18,15 @@ var theTests = []struct {
 	name               string
 	url                string
 	method             string
-	params             []postData
 	expectedStatusCode int
 }{
-	// {"home", "/", "GET", []postData{}, http.StatusOK},
+	{"home", "/", "GET", http.StatusOK},
-	// {"about", "/about", "GET", []postData{}, http.StatusOK},
+	{"about", "/about", "GET", http.StatusOK},
-	// {"gq", "/generals-quarters", "GET", []postData{}, http.StatusOK},
+	{"gq", "/generals-quarters", "GET", http.StatusOK},
-	// {"ms", "/majors-suite", "GET", []postData{}, http.StatusOK},
+	{"ms", "/majors-suite", "GET", http.StatusOK},
-	// {"sa", "/availability", "GET", []postData{}, http.StatusOK},
+	{"sa", "/availability", "GET", http.StatusOK},
-	// {"contact", "/contact", "GET", []postData{}, http.StatusOK},
+	{"contact", "/contact", "GET", http.StatusOK},
-	// {"ma", "/make-reservation", "GET", []postData{}, http.StatusOK},
+
 	// {"post-search-avail", "/availability", "POST", []postData{
 	// 	{key: "start", value: "2020-01-01"},
 	// 	{key: "end", value: "2020-01-02"},
@@ -51,7 +49,6 @@ func TestHandlers(t *testing.T) {
 	defer ts.Close()
 
 	for _, e := range theTests {
-		if e.method == "GET" {
 		resp, err := ts.Client().Get(ts.URL + e.url)
 		if err != nil {
 			t.Log(err)
@@ -60,20 +57,6 @@ func TestHandlers(t *testing.T) {
 		if resp.StatusCode != e.expectedStatusCode {
 			t.Errorf("for %s, expected %d but got %d", e.name, e.expectedStatusCode, resp.StatusCode)
 		}
-		} else {
-			values := url.Values{}
-			for _, x := range e.params {
-				values.Add(x.key, x.value)
-			}
-			resp, err := ts.Client().PostForm(ts.URL+e.url, values)
-			if err != nil {
-				t.Log(err)
-				t.Fatal(err)
-			}
-			if resp.StatusCode != e.expectedStatusCode {
-				t.Errorf("for %s, expected %d but got %d", e.name, e.expectedStatusCode, resp.StatusCode)
-			}
-		}
 	}
 }
 
@@ -103,6 +86,32 @@ func TestRepository_Reservation(t *testing.T) {
 		t.Errorf("Reservation handler returned response code: got %d, wanted %d",
 			rr.Code, http.StatusOK)
 	}
+
+	// test case where reservation is not in session (reset everything)
+	req, _ = http.NewRequest("GET", "/make-reservation", nil)
+	ctx = getCtx(req)
+	req = req.WithContext(ctx)
+	rr = httptest.NewRecorder()
+
+	handler.ServeHTTP(rr, req)
+	if rr.Code != http.StatusTemporaryRedirect {
+		t.Errorf("Reservation handler returned response code: got %d, wanted %d",
+			rr.Code, http.StatusTemporaryRedirect)
+	}
+
+	// test with non-existant room
+	req, _ = http.NewRequest("GET", "/make-reservation", nil)
+	ctx = getCtx(req)
+	req = req.WithContext(ctx)
+	rr = httptest.NewRecorder()
+	reservation.RoomID = 100
+	session.Put(ctx, "reservation", reservation)
+
+	handler.ServeHTTP(rr, req)
+	if rr.Code != http.StatusTemporaryRedirect {
+		t.Errorf("Reservation handler returned response code: got %d, wanted %d",
+			rr.Code, http.StatusTemporaryRedirect)
+	}
 }
 
 func getCtx(req *http.Request) context.Context {

internal/repository/dbrepo/test-repo.go

@@ -1,6 +1,7 @@
 package dbrepo
 
 import (
+	"errors"
 	"go-udemy-web-1/internal/models"
 	"time"
 )
@@ -33,5 +34,9 @@ func (m *testDBRepo) SearchAvailabilityForAllRooms(start, end time.Time) ([]mode
 // GetRoomById gets a room by id
 func (m *testDBRepo) GetRoomById(id int) (models.Room, error) {
 	var room models.Room
+
+	if id > 2 {
+		return room, errors.New("Deliberate error")
+	}
 	return room, nil
 }