Test_Cache_MaxBytes_InsufficientSpace() — fiber Function Reference

Source Code

middleware/cache/cache_test.go lines 3804–3854

func Test_Cache_MaxBytes_InsufficientSpace(t *testing.T) {
	t.Parallel()

	t.Run("entry larger than MaxBytes with empty cache", func(t *testing.T) {
		t.Parallel()
		app := fiber.New()

		app.Use(New(Config{
			MaxBytes:   10, // Very small cache
			Expiration: 1 * time.Hour,
		}))

		app.Get("/large", func(c fiber.Ctx) error {
			// Return data larger than MaxBytes
			return c.Send(make([]byte, 20))
		})

		rsp, err := app.Test(httptest.NewRequest(fiber.MethodGet, "/large", http.NoBody))
		require.NoError(t, err)
		// Should be unreachable because entry is too large
		require.Equal(t, cacheUnreachable, rsp.Header.Get("X-Cache"))
	})

	t.Run("entry larger than MaxBytes after eviction", func(t *testing.T) {
		t.Parallel()
		app := fiber.New()

		app.Use(New(Config{
			MaxBytes:            15,
			ExpirationGenerator: stableAscendingExpiration(),
		}))

		app.Get("/*", func(c fiber.Ctx) error {
			path := c.Path()
			if path == "/small" {
				return c.Send(make([]byte, 5))
			}
			return c.Send(make([]byte, 20))
		})

		// Cache a small entry first
		rsp, err := app.Test(httptest.NewRequest(fiber.MethodGet, "/small", http.NoBody))
		require.NoError(t, err)
		require.Equal(t, cacheMiss, rsp.Header.Get("X-Cache"))

		// Try to cache a large entry - should return unreachable since it won't fit even after eviction
		rsp, err = app.Test(httptest.NewRequest(fiber.MethodGet, "/large", http.NoBody))
		require.NoError(t, err)
		require.Equal(t, cacheUnreachable, rsp.Header.Get("X-Cache"))
	})
}