improve unit test for caching (go-gitea#26185)

- Configure `setting.CacheService.TTL` which will force the code to go
trough the caching mechanism.
- Remove the TODO and uncomment the test code.

(cherry picked from commit a201f2f1896c1a086f3e37f86b1306d44c07f2e4)

Refs: https://codeberg.org/forgejo/forgejo/pulls/974

---------

Co-authored-by: Gusted <postmaster@gusted.xyz>

modules/cache/cache_test.go

@@ -18,6 +18,7 @@ func createTestCache() {
 		Adapter: "memory",
 		TTL:     time.Minute,
 	})
+	setting.CacheService.TTL = 24 * time.Hour
 }
 
 func TestNewContext(t *testing.T) {
@@ -54,26 +55,25 @@ func TestGetString(t *testing.T) {
 	assert.NoError(t, err)
 	assert.Equal(t, "", data)
 
-	// data, err = GetString("key", func() (string, error) {
-	// 	return "some data", nil
-	// })
-	// assert.NoError(t, err)
-	// assert.Equal(t, "", data)
-	// Remove("key")
+	data, err = GetString("key", func() (string, error) {
+		return "some data", nil
+	})
+	assert.NoError(t, err)
+	assert.Equal(t, "", data)
+	Remove("key")
 
 	data, err = GetString("key", func() (string, error) {
 		return "some data", nil
 	})
 	assert.NoError(t, err)
 	assert.Equal(t, "some data", data)
 
-	// data, err = GetString("key", func() (string, error) {
-	// 	return "", fmt.Errorf("some error")
-	// })
-	// assert.NoError(t, err)
-	// assert.Equal(t, "some data", data)
-
-	// TODO: uncommented code works in IDE but not with go test
+	data, err = GetString("key", func() (string, error) {
+		return "", fmt.Errorf("some error")
+	})
+	assert.NoError(t, err)
+	assert.Equal(t, "some data", data)
+	Remove("key")
 }
 
 func TestGetInt(t *testing.T) {
@@ -91,26 +91,25 @@ func TestGetInt(t *testing.T) {
 	assert.NoError(t, err)
 	assert.Equal(t, 0, data)
 
-	// data, err = GetInt("key", func() (int, error) {
-	// 	return 100, nil
-	// })
-	// assert.NoError(t, err)
-	// assert.Equal(t, 0, data)
-	// Remove("key")
+	data, err = GetInt("key", func() (int, error) {
+		return 100, nil
+	})
+	assert.NoError(t, err)
+	assert.Equal(t, 0, data)
+	Remove("key")
 
 	data, err = GetInt("key", func() (int, error) {
 		return 100, nil
 	})
 	assert.NoError(t, err)
 	assert.Equal(t, 100, data)
 
-	// data, err = GetInt("key", func() (int, error) {
-	// 	return 0, fmt.Errorf("some error")
-	// })
-	// assert.NoError(t, err)
-	// assert.Equal(t, 100, data)
-
-	// TODO: uncommented code works in IDE but not with go test
+	data, err = GetInt("key", func() (int, error) {
+		return 0, fmt.Errorf("some error")
+	})
+	assert.NoError(t, err)
+	assert.Equal(t, 100, data)
+	Remove("key")
 }
 
 func TestGetInt64(t *testing.T) {
@@ -128,24 +127,23 @@ func TestGetInt64(t *testing.T) {
 	assert.NoError(t, err)
 	assert.EqualValues(t, 0, data)
 
-	// data, err = GetInt64("key", func() (int64, error) {
-	// 	return 100, nil
-	// })
-	// assert.NoError(t, err)
-	// assert.EqualValues(t, 0, data)
-	// Remove("key")
+	data, err = GetInt64("key", func() (int64, error) {
+		return 100, nil
+	})
+	assert.NoError(t, err)
+	assert.EqualValues(t, 0, data)
+	Remove("key")
 
 	data, err = GetInt64("key", func() (int64, error) {
 		return 100, nil
 	})
 	assert.NoError(t, err)
 	assert.EqualValues(t, 100, data)
 
-	// data, err = GetInt64("key", func() (int, error) {
-	// 	return 0, fmt.Errorf("some error")
-	// })
-	// assert.NoError(t, err)
-	// assert.EqualValues(t, 100, data)
-
-	// TODO: uncommented code works in IDE but not with go test
+	data, err = GetInt64("key", func() (int64, error) {
+		return 0, fmt.Errorf("some error")
+	})
+	assert.NoError(t, err)
+	assert.EqualValues(t, 100, data)
+	Remove("key")
 }