working on valuemonitor

valuemonitortest.go

@@ -0,0 +1,39 @@
+package settings
+
+import (
+	"fmt"
+	"os"
+	"testing"
+)
+
+func TestStringValueMonitor(t *testing.T) {
+	key, value := "my key to monitor", "first value"
+	monitor, err := NewValueMonitor(TheSettings, key, func(s string) (string, error) { return value, nil })
+	if err != nil {
+		t.Fatalf("error opening new value monitor: %v\n", err)
+	}
+	if want, got := value, monitor.GetValue(); want != got {
+		t.Fatalf("error: wanted %q; got %q\n", want, got)
+	}
+	value = "second value"
+	TheSettings.SetKeyValue(key, value)
+	if want, got := value, monitor.GetValue(); want != got {
+		t.Fatalf("error: wanted %q; got %q\n", want, got)
+	}
+	value = "third value"
+	f, err := os.OpenFile(TheSettings.GetFilename(), os.O_APPEND|os.O_WRONLY, 0664)
+	if err != nil {
+		t.Fatalf("error opening file writer to append settings: %v\n", err)
+	}
+	_, err = f.WriteString(fmt.Sprintf("\n%s=%s\n", key, value))
+	if err != nil {
+		t.Fatalf("error appending to file: %v\n", err)
+	}
+	err = TheSettings.Update()
+	if err != nil {
+		t.Fatalf("error updating the settings: %v\n", err)
+	}
+	if want, got := value, monitor.GetValue(); want != got {
+		t.Fatalf("error: wanted %q; got %q\n", want, got)
+	}
+}