ch14.5

cmd/web/handlers_test.go

@@ -18,3 +18,61 @@ func TestPing(t *testing.T) {
 	assert.Equal(t, statusCode, http.StatusOK)
 	assert.Equal(t, body, "OK")
 }
+
+func TestSnippetView(t *testing.T) {
+	app := newTestApplication(t)
+
+	ts := newTestServer(t, app.routes())
+	defer ts.Close()
+
+	tests := []struct {
+		name     string
+		urlPath  string
+		wantCode int
+		wantBody string
+	}{
+		{
+			name:     "Valid ID",
+			urlPath:  "/snippet/view/1",
+			wantCode: http.StatusOK,
+			wantBody: "An old silent pond...",
+		},
+		{
+			name:     "Non-existend ID",
+			urlPath:  "/snippet/view/2",
+			wantCode: http.StatusNotFound,
+		},
+		{
+			name:     "Negative ID",
+			urlPath:  "/snippet/view/-1",
+			wantCode: http.StatusNotFound,
+		},
+		{
+			name:     "Decimal ID",
+			urlPath:  "/snippet/view/1.23",
+			wantCode: http.StatusNotFound,
+		},
+		{
+			name:     "String ID",
+			urlPath:  "/snippet/view/foo",
+			wantCode: http.StatusNotFound,
+		},
+		{
+			name:     "Empty ID",
+			urlPath:  "/snippet/view/",
+			wantCode: http.StatusNotFound,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			code, _, body := ts.get(t, tt.urlPath)
+
+			assert.Equal(t, code, tt.wantCode)
+
+			if tt.wantBody != "" {
+				assert.StringContains(t, body, tt.wantBody)
+			}
+		})
+	}
+}

cmd/web/main.go

@@ -21,8 +21,8 @@ import (
 type application struct {
 	errorLog       *log.Logger
 	infoLog        *log.Logger
-	snippets       *models.SnippetModel
-	users          *models.UserModel
+	snippets       models.SnippetModelInterface
+	users          models.UserModelInterface
 	templateCache  map[string]*template.Template
 	formDecoder    *form.Decoder
 	sessionManager *scs.SessionManager

cmd/web/testutils_test.go

@@ -8,12 +8,33 @@ import (
 	"net/http/cookiejar"
 	"net/http/httptest"
 	"testing"
+	"time"
+
+	"gitea.local.lab/Lbenedar/snippetbox/internal/models/mocks"
+	"github.com/alexedwards/scs/v2"
+	"github.com/go-playground/form/v4"
 )
 
 func newTestApplication(t *testing.T) *application {
+	templateCache, err := newTemplateCache()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	formDecoder := form.NewDecoder()
+
+	sessionManager := scs.New()
+	sessionManager.Lifetime = 12 * time.Hour
+	sessionManager.Cookie.Secure = true
+
 	return &application{
-		errorLog: log.New(io.Discard, "", 0),
-		infoLog:  log.New(io.Discard, "", 0),
+		errorLog:       log.New(io.Discard, "", 0),
+		infoLog:        log.New(io.Discard, "", 0),
+		snippets:       &mocks.SnippetModel{},
+		users:          &mocks.UserModel{},
+		templateCache:  templateCache,
+		formDecoder:    formDecoder,
+		sessionManager: sessionManager,
 	}
 }
 

internal/assert/assert.go

@@ -1,6 +1,9 @@
 package assert
 
-import "testing"
+import (
+	"strings"
+	"testing"
+)
 
 func Equal[T comparable](t *testing.T, actual, expected T) {
 	t.Helper()
@@ -9,3 +12,11 @@ func Equal[T comparable](t *testing.T, actual, expected T) {
 		t.Errorf("got: %v; want: %v", actual, expected)
 	}
 }
+
+func StringContains(t *testing.T, actual, expectedString string) {
+	t.Helper()
+
+	if !strings.Contains(actual, expectedString) {
+		t.Errorf("got: %q; expected to contain: %q", actual, expectedString)
+	}
+}

internal/models/mocks/snippets.go

@@ -0,0 +1,34 @@
+package mocks
+
+import (
+	"time"
+
+	"gitea.local.lab/Lbenedar/snippetbox/internal/models"
+)
+
+var mockSnippet = &models.Snippet{
+	ID:      1,
+	Title:   "An old silent pond",
+	Content: "An old silent pond...",
+	Created: time.Now(),
+	Expires: time.Now(),
+}
+
+type SnippetModel struct{}
+
+func (m *SnippetModel) Insert(title string, content string, expires int) (int, error) {
+	return 2, nil
+}
+
+func (m *SnippetModel) Get(id int) (*models.Snippet, error) {
+	switch id {
+	case 1:
+		return mockSnippet, nil
+	default:
+		return nil, models.ErrNoRecord
+	}
+}
+
+func (m *SnippetModel) Latest() ([]*models.Snippet, error) {
+	return []*models.Snippet{mockSnippet}, nil
+}

internal/models/mocks/users.go

@@ -0,0 +1,31 @@
+package mocks
+
+import "gitea.local.lab/Lbenedar/snippetbox/internal/models"
+
+type UserModel struct{}
+
+func (m *UserModel) Insert(name, email, password string) error {
+	switch email {
+	case "dupe@example.com":
+		return models.ErrDuplicateEmail
+	default:
+		return nil
+	}
+}
+
+func (m *UserModel) Authenticate(email, password string) (int, error) {
+	if email == "alice@example.com" && password == "pa$$word" {
+		return 1, nil
+	}
+
+	return 0, models.ErrInvalidCredentials
+}
+
+func (m *UserModel) Exists(id int) (bool, error) {
+	switch id {
+	case 1:
+		return true, nil
+	default:
+		return false, nil
+	}
+}

internal/models/snippets.go

@@ -13,7 +13,11 @@ type Snippet struct {
 	Created time.Time
 	Expires time.Time
 }
-
+type SnippetModelInterface interface {
+	Insert(title string, content string, expires int) (int, error)
+	Get(id int) (*Snippet, error)
+	Latest() ([]*Snippet, error)
+}
 type SnippetModel struct {
 	DB *sql.DB
 }

internal/models/users.go

@@ -18,6 +18,12 @@ type User struct {
 	Created        time.Time
 }
 
+type UserModelInterface interface {
+	Insert(name, email, password string) error
+	Authenticate(email, password string) (int, error)
+	Exists(id int) (bool, error)
+}
+
 type UserModel struct {
 	DB *sql.DB
 }