1 files changed, 24 insertions, 0 deletions
diff --git a/internal/clock/clock_test.go b/internal/clock/clock_test.go
new file mode 100644
index 0000000..441e261
--- /dev/null
+++ b/internal/clock/clock_test.go
@@ -0,0 +1,24 @@
+package clock
+
+import (
+	"testing"
+	"time"
+)
+
+func TestRealClock_Now(t *testing.T) {
+	c := RealClock{}
+	before := time.Now()
+	got := c.Now()
+	after := time.Now()
+	if got.Before(before) || got.After(after) {
+		t.Fatalf("RealClock.Now() out of range: %v", got)
+	}
+}
+
+func TestMockClock_Now(t *testing.T) {
+	fixed := time.Date(2024, 1, 1, 0, 0, 0, 0, time.UTC)
+	c := &MockClock{T: fixed}
+	if got := c.Now(); got != fixed {
+		t.Fatalf("expected %v, got %v", fixed, got)
+	}
+}