chore: add app tests

pkg/app.go

@@ -29,6 +29,7 @@ type App struct {
 	ReportGenerator  *report.Generator
 	StateGenerator   *state.Generator
 	ReportDispatcher *report.Dispatcher
+	StopChannel      chan bool
 }
 
 func NewApp(configPath string, filesystem fs.FS, version string) *App {
@@ -93,6 +94,7 @@ func NewApp(configPath string, filesystem fs.FS, version string) *App {
 		ReportGenerator:  reportGenerator,
 		StateGenerator:   stateGenerator,
 		ReportDispatcher: reportDispatcher,
+		StopChannel:      make(chan bool),
 	}
 }
 
@@ -103,15 +105,19 @@ func (a *App) Start() {
 	}
 
 	c := cron.New()
-	if _, err := c.AddFunc(a.Config.Interval, func() {
-		a.Report()
-	}); err != nil {
+	if _, err := c.AddFunc(a.Config.Interval, a.Report); err != nil {
 		a.Logger.Panic().Err(err).Msg("Error processing cron pattern")
 	}
 	c.Start()
 	a.Logger.Info().Str("interval", a.Config.Interval).Msg("Scheduled proposals reporting")
 
-	select {}
+	<-a.StopChannel
+	a.Logger.Info().Msg("Shutting down...")
+	c.Stop()
+}
+
+func (a *App) Stop() {
+	a.StopChannel <- true
 }
 
 func (a *App) Report() {

pkg/app_test.go

@@ -0,0 +1,123 @@
+package pkg
+
+import (
+	"main/pkg/fs"
+	reportersPkg "main/pkg/reporters"
+	"sync"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestAppFailToLoadConfig(t *testing.T) {
+	t.Parallel()
+
+	defer func() {
+		if r := recover(); r == nil {
+			require.Fail(t, "Expected to have a panic here!")
+		}
+	}()
+
+	filesystem := &fs.TestFS{}
+
+	NewApp("notexisting.toml", filesystem, "1.2.3")
+}
+
+func TestAppFailInvalidConfig(t *testing.T) {
+	t.Parallel()
+
+	defer func() {
+		if r := recover(); r == nil {
+			require.Fail(t, "Expected to have a panic here!")
+		}
+	}()
+
+	filesystem := &fs.TestFS{}
+
+	NewApp("config-invalid.toml", filesystem, "1.2.3")
+}
+
+func TestAppCreateConfigWithWarnings(t *testing.T) {
+	t.Parallel()
+
+	filesystem := &fs.TestFS{}
+
+	app := NewApp("config-with-warnings.toml", filesystem, "1.2.3")
+	require.NotNil(t, app)
+}
+
+func TestAppCreateConfigValid(t *testing.T) {
+	t.Parallel()
+
+	filesystem := &fs.TestFS{}
+
+	app := NewApp("config-valid.toml", filesystem, "1.2.3")
+	require.NotNil(t, app)
+}
+
+func TestAppStartReporterFailedToInit(t *testing.T) {
+	t.Parallel()
+
+	filesystem := &fs.TestFS{}
+
+	defer func() {
+		if r := recover(); r == nil {
+			require.Fail(t, "Expected to have a panic here!")
+		}
+	}()
+
+	app := NewApp("config-valid.toml", filesystem, "1.2.3")
+	app.ReportDispatcher.Reporters = []reportersPkg.Reporter{&reportersPkg.TestReporter{WithInitFail: true}}
+
+	app.Start()
+	require.NotNil(t, app)
+}
+
+func TestAppStartInvalidCronPattern(t *testing.T) {
+	t.Parallel()
+
+	filesystem := &fs.TestFS{}
+
+	defer func() {
+		if r := recover(); r == nil {
+			require.Fail(t, "Expected to have a panic here!")
+		}
+	}()
+
+	app := NewApp("config-valid.toml", filesystem, "1.2.3")
+	app.Config.Interval = "invalid"
+
+	app.Start()
+	require.NotNil(t, app)
+}
+
+func TestAppStartOk(t *testing.T) {
+	t.Parallel()
+
+	filesystem := &fs.TestFS{}
+	app := NewApp("config-valid.toml", filesystem, "1.2.3")
+	app.ReportDispatcher.Reporters = []reportersPkg.Reporter{&reportersPkg.TestReporter{}}
+
+	var wg sync.WaitGroup
+	wg.Add(1)
+
+	go func() {
+		app.Start()
+		wg.Done()
+	}()
+
+	app.Stop()
+	wg.Wait()
+	assert.True(t, true)
+}
+
+func TestAppReport(t *testing.T) {
+	t.Parallel()
+
+	filesystem := &fs.TestFS{}
+	app := NewApp("config-valid.toml", filesystem, "1.2.3")
+	app.Report()
+
+	assert.True(t, true)
+}