feat(BRIDGE-356): Added retry logic for unavailable preferred keychain on Linux; Feature flag support before bridge initialization; Refactored some bits of the code;

internal/unleash/startup_test.go

@@ -0,0 +1,156 @@
+// Copyright (c) 2025 Proton AG
+//
+// This file is part of Proton Mail Bridge.
+//
+// Proton Mail Bridge is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Proton Mail Bridge is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Proton Mail Bridge. If not, see <https://www.gnu.org/licenses/>.
+
+package unleash
+
+import (
+	"encoding/json"
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/Masterminds/semver/v3"
+	"github.com/stretchr/testify/require"
+)
+
+func TestReadStartupCacheFile_Success(t *testing.T) {
+	tmpDir := t.TempDir()
+	filePath := filepath.Join(tmpDir, "valid_cache")
+	file, err := os.Create(filePath)
+	require.NoError(t, err)
+
+	testData := map[string]bool{
+		"feature1": true,
+		"feature2": false,
+	}
+	err = json.NewEncoder(file).Encode(testData)
+	require.NoError(t, err)
+	err = file.Close()
+	require.NoError(t, err)
+
+	startupCache, err := readStartupCacheFile(filePath)
+	require.NoError(t, err)
+	require.Equal(t, testData, startupCache)
+}
+
+func TestReadStartupCacheFile_InvalidFilePath(t *testing.T) {
+	filePath := "badFilepath/hello"
+	startupCache, err := readStartupCacheFile(filePath)
+	require.Error(t, err)
+	require.Empty(t, startupCache)
+}
+
+func TestSaveStartupCacheFile_Success(t *testing.T) {
+	tmpDir := t.TempDir()
+	filePath := filepath.Join(tmpDir, "test_cache")
+
+	testData := map[string]bool{
+		"feature1": true,
+		"feature2": false,
+		"feature3": true,
+	}
+
+	err := saveStartupCacheFile(testData, filePath)
+	require.NoError(t, err)
+
+	savedData, err := readStartupCacheFile(filePath)
+	require.NoError(t, err)
+	require.Equal(t, testData, savedData)
+}
+
+func TestSaveStartupCacheFile_InvalidFilePath(t *testing.T) {
+	badFilePath := "/some_random_dir/hey/hello"
+
+	testData := map[string]bool{
+		"feature1": true,
+		"feature2": false,
+	}
+
+	err := saveStartupCacheFile(testData, badFilePath)
+	require.Error(t, err)
+}
+
+func TestGetStartupFeatureFlagsAndStore_FakeAPIURL(t *testing.T) {
+	apiURL := "https://example.com"
+	cacheProvider := func() (string, error) {
+		return t.TempDir(), nil
+	}
+
+	version, err := semver.NewVersion("3.99.99+test")
+	require.NoError(t, err)
+
+	featureFlags := GetStartupFeatureFlagsAndStore(apiURL, version, cacheProvider)
+	require.Empty(t, featureFlags)
+}
+
+func TestGetStartupFeatureFlagsAndStore_RealAPIURL(t *testing.T) {
+	apiURL := "https://mail-api.proton.me"
+	cacheProvider := func() (string, error) {
+		return t.TempDir(), nil
+	}
+
+	version, err := semver.NewVersion("3.99.99+test")
+	require.NoError(t, err)
+
+	featureFlags := GetStartupFeatureFlagsAndStore(apiURL, version, cacheProvider)
+	require.NotEmpty(t, featureFlags)
+}
+
+func TestGetStartupFeatureFlagsAndStore_FeatureFlagCacheRetention(t *testing.T) {
+	fakeAPIURL := "https://example.com"
+	realAPIURL := "https://mail-api.proton.me"
+
+	cacheDir := t.TempDir()
+	cacheProvider := func() (string, error) {
+		return cacheDir, nil
+	}
+
+	version, err := semver.NewVersion("3.99.99+test")
+	require.NoError(t, err)
+
+	featureFlags := GetStartupFeatureFlagsAndStore(realAPIURL, version, cacheProvider)
+	require.NotEmpty(t, featureFlags)
+
+	featureFlagsFromCache := GetStartupFeatureFlagsAndStore(fakeAPIURL, version, cacheProvider)
+	require.NotEmpty(t, featureFlagsFromCache)
+	require.Equal(t, featureFlags, featureFlagsFromCache)
+}
+
+func Test(t *testing.T) {
+	fakeAPIURL := "https://example.com"
+
+	tmpDir := t.TempDir()
+	cacheProvider := func() (string, error) {
+		return tmpDir, nil
+	}
+	filePath := filepath.Join(tmpDir, startupCacheFilename)
+
+	testData := map[string]bool{
+		"feature1": true,
+		"feature2": false,
+		"feature3": true,
+	}
+	err := saveStartupCacheFile(testData, filePath)
+	require.NoError(t, err)
+
+	version, err := semver.NewVersion("3.99.99+git")
+	require.NoError(t, err)
+
+	featureFlagsFromCache := GetStartupFeatureFlagsAndStore(fakeAPIURL, version, cacheProvider)
+	require.NotEmpty(t, featureFlagsFromCache)
+	require.Equal(t, testData, featureFlagsFromCache)
+}