Add tests

mpris/mpris_test.go

@@ -0,0 +1,84 @@
+package mpris
+
+import (
+	"reflect"
+	"testing"
+
+	"github.com/godbus/dbus/v5"
+)
+
+// TestParsePropertiesChanged checks the parsePropertiesChanged function to
+// make sure it correctly parses a DBus PropertiesChanged signal.
+func TestParsePropertiesChanged(t *testing.T) {
+	// Create a DBus message
+	msg := &dbus.Message{
+		Body: []interface{}{
+			"com.example.Interface",
+			map[string]dbus.Variant{
+				"Property1": dbus.MakeVariant(true),
+				"Property2": dbus.MakeVariant("Hello, world!"),
+			},
+			[]string{},
+		},
+	}
+
+	// Parse the message
+	iface, changed, ok := parsePropertiesChanged(msg)
+	if !ok {
+		t.Error("Expected parsePropertiesChanged to return true, but got false")
+	}
+
+	// Check the parsed values
+	expectedIface := "com.example.Interface"
+	if iface != expectedIface {
+		t.Errorf("Expected iface to be %q, but got %q", expectedIface, iface)
+	}
+
+	expectedChanged := map[string]dbus.Variant{
+		"Property1": dbus.MakeVariant(true),
+		"Property2": dbus.MakeVariant("Hello, world!"),
+	}
+	if !reflect.DeepEqual(changed, expectedChanged) {
+		t.Errorf("Expected changed to be %v, but got %v", expectedChanged, changed)
+	}
+
+	// Test a message with an invalid number of arguments
+	msg = &dbus.Message{
+		Body: []interface{}{
+			"com.example.Interface",
+		},
+	}
+	_, _, ok = parsePropertiesChanged(msg)
+	if ok {
+		t.Error("Expected parsePropertiesChanged to return false, but got true")
+	}
+
+	// Test a message with an invalid first argument
+	msg = &dbus.Message{
+		Body: []interface{}{
+			123,
+			map[string]dbus.Variant{
+				"Property1": dbus.MakeVariant(true),
+				"Property2": dbus.MakeVariant("Hello, world!"),
+			},
+			[]string{},
+		},
+	}
+	_, _, ok = parsePropertiesChanged(msg)
+	if ok {
+		t.Error("Expected parsePropertiesChanged to return false, but got true")
+	}
+
+	// Test a message with an invalid second argument
+	msg = &dbus.Message{
+		Body: []interface{}{
+			"com.example.Interface",
+			123,
+			[]string{},
+		},
+	}
+	_, _, ok = parsePropertiesChanged(msg)
+	if ok {
+		t.Error("Expected parsePropertiesChanged to return false, but got true")
+	}
+}