add more tests

internal/handlers/handlers_test.go

@@ -574,6 +574,64 @@ func Test_BookRoom(t *testing.T) {
 	}
 }
 
+// }}}
+// {{{ Login
+
+var loginTests = []struct {
+	name               string
+	email              string
+	expectedStatusCode int
+	expectedHTML       string
+	expectedLocation   string
+}{
+	{"valid-credentials", "a@b.c", http.StatusSeeOther, "", "/admin/dashboard"},
+	{"invalid-credentials", "invalid@b.c", http.StatusSeeOther, "", "/user/login"},
+	{"invalid-data", "a@b", http.StatusOK, `action="/user/login"`, ""},
+}
+
+func TestLogin(t *testing.T) {
+	// range through all tests
+	for _, e := range loginTests {
+		postedData := url.Values{}
+		postedData.Add("email", e.email)
+		postedData.Add("password", "password")
+
+		// create request
+		req, _ := http.NewRequest("POST", "/user/login", strings.NewReader(postedData.Encode()))
+		ctx := getCtx(req)
+		req = req.WithContext(ctx)
+
+		// set the header
+		req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
+		rr := httptest.NewRecorder()
+
+		// call the handler
+		handler := http.HandlerFunc(Repo.PostShowLogin)
+		handler.ServeHTTP(rr, req)
+
+		if rr.Code != e.expectedStatusCode {
+			t.Errorf("failed %s: expected code %d, but got %d", e.name, e.expectedStatusCode, rr.Code)
+		}
+
+		if e.expectedLocation != "" {
+			// get the URL from test
+			actualLoc, _ := rr.Result().Location()
+			if actualLoc.String() != e.expectedLocation {
+				t.Errorf("failed %s: expected location %s, but got location %s", e.name, e.expectedLocation, actualLoc.String())
+			}
+		}
+
+		// checking for expected values in HTML
+		if e.expectedHTML != "" {
+			// read the response body into a string
+			html := rr.Body.String()
+			if !strings.Contains(html, e.expectedHTML) {
+				t.Errorf("failed %s: expected html contains %s, but got html %s", e.name, e.expectedHTML, html)
+			}
+		}
+	}
+}
+
 // }}}
 // {{{ Test Helpers
 

internal/repository/dbrepo/test-repo.go

@@ -79,7 +79,10 @@ func (m *testDBRepo) UpdateUser(u models.User) error {
 
 // Authenticate authenticates a user
 func (m *testDBRepo) Authenticate(email, testPassword string) (int, string, error) {
-	return 1, "", nil
+	if email == "a@b.c" {
+		return 1, "", nil
+	}
+	return 0, "", errors.New("deliberate errors")
 }
 
 // AllReservations returns a slice of all reservations