test(time): add test for Time and ClockSequence method

Author: fyvri

time_test.go

@@ -42,3 +42,77 @@ func TestGetTime(t *testing.T) {
 		})
 	}
 }
+
+func TestClockSequenceInitialization(t *testing.T) {
+	// Backup and reset global state
+	timeMu.Lock()
+	origSeq := clockSeq
+	clockSeq = 0 // Force initialization
+	timeMu.Unlock()
+	defer func() {
+		timeMu.Lock()
+		clockSeq = origSeq
+		timeMu.Unlock()
+	}()
+
+	// First call initializes the sequence
+	seq := ClockSequence()
+	if seq == 0 {
+		t.Error("ClockSequence() should not return 0 after initialization")
+	}
+
+	// Ensure the sequence is within 14-bit mask
+	if seq&0xc000 != 0 {
+		t.Errorf("ClockSequence() = %x, expected 14-bit value (mask 0x3fff)", seq)
+	}
+
+	// Subsequent call should return the same sequence
+	seq2 := ClockSequence()
+	if seq2 != seq {
+		t.Errorf("Expected sequence %x, got %x", seq, seq2)
+	}
+}
+
+func TestTime(t *testing.T) {
+	tests := []struct {
+		name    string
+		uuid    UUID
+		version int
+		want    Time
+	}{
+		{
+			name:    "Version 6",
+			uuid:    UUID{0x12, 0x34, 0x56, 0x78, 0x9A, 0xBC, 0x6D, 0xEF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
+			version: 6,
+			want:    Time((0x12345678 << 28) | (0x9ABC << 12) | 0xDEF),
+		},
+		{
+			name:    "Version 7",
+			uuid:    UUID{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x70, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
+			version: 7,
+			want:    Time(g1582ns100),
+		},
+		{
+			name:    "Default Version",
+			uuid:    UUID{0x12, 0x34, 0x56, 0x78, 0x9A, 0xBC, 0x1D, 0xEF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
+			version: 1,
+			want:    Time(int64(0x12345678) | (int64(0x9ABC) << 32) | (int64(0xDEF) << 48)),
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := tt.uuid.Time(); got != tt.want {
+				t.Errorf("UUID.Time() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func TestClockSequence(t *testing.T) {
+	uuid := UUID{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x12, 0x34, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}
+	expected := 0x1234 & 0x3fff
+	if got := uuid.ClockSequence(); got != expected {
+		t.Errorf("ClockSequence() = %x, want %x", got, expected)
+	}
+}