refactor: add a stop channel

.gitignore

@@ -3,3 +3,4 @@ bin/*
 !bin/.gitkeep
 dist/
 Pominal
+cover.out

cases_test.go

@@ -43,6 +43,7 @@ var pominalTestCases = []struct {
 			shortBreak:      300,
 			longBreak:       600,
 			label:           "",
+			stopChan:        nil,
 		},
 	},
 	{
@@ -61,6 +62,7 @@ var pominalTestCases = []struct {
 			shortBreak:      1536,
 			longBreak:       1200,
 			label:           "",
+			stopChan:        nil,
 		},
 	},
 	{
@@ -79,6 +81,7 @@ var pominalTestCases = []struct {
 			shortBreak:      60,
 			longBreak:       60,
 			label:           "",
+			stopChan:        nil,
 		},
 	},
 	{
@@ -97,6 +100,7 @@ var pominalTestCases = []struct {
 			shortBreak:      300,
 			longBreak:       1200,
 			label:           "",
+			stopChan:        nil,
 		},
 	},
 }

main.go

@@ -93,5 +93,4 @@ func main() {
 	if err := app.SetRoot(flex, true).SetFocus(flex).Run(); err != nil {
 		panic(err)
 	}
-
 }

pominal.go

@@ -19,9 +19,6 @@
 package main
 
 import (
-	"os"
-	"os/signal"
-	"syscall"
 	"time"
 
 	"github.com/rivo/tview"
@@ -55,6 +52,9 @@ type Pominal struct {
 
 	// label labels Pominal based on the session.
 	label string
+
+	// stopChan is a no-data channel used to stop Pominal.
+	stopChan chan struct{}
 }
 
 // NewPominal creates a new pominal instance
@@ -67,22 +67,21 @@ func NewPominal(w, s, l float64, m int) Pominal {
 		work:            setSessionTime(w),
 		shortBreak:      setSessionTime(s),
 		longBreak:       setSessionTime(l),
+		stopChan:        nil,
 	}
 }
 
 // Run Pominal
 func (p *Pominal) Run(infoUI, timerUI *tview.TextView) {
-	s := make(chan os.Signal, 1)
-	signal.Notify(s, syscall.SIGINT, syscall.SIGTERM)
 
 	p.UpdateSession(infoUI)
 	t := time.NewTicker(1 * time.Second)
+	p.stopChan = make(chan struct{})
 
 infinite:
 	for {
 		select {
-		case <-s:
+		case <-p.stopChan:
-			// fmt.Printf("\n\nReceived signal '%s'. Closing Pominal.\n", sig)
 			t.Stop()
 			break infinite
 		case <-t.C:
@@ -99,6 +98,12 @@ infinite:
 	}
 }
 
+// Stop sends a signal to the Run method to stop the timer.
+// Afterwards the process returns from the Run method.
+func (p *Pominal) Stop() {
+	close(p.stopChan)
+}
+
 // UpdateSession resets Pominal's countdown
 // based on the next session. If a 'short break'
 // session is over the work session counter is incremented.