Initial Backupper Unraid plugin

internal/scheduler/cron_test.go

@@ -0,0 +1,45 @@
+package scheduler
+
+import (
+	"testing"
+	"time"
+)
+
+func TestCronMatchesAndNext(t *testing.T) {
+	expr, err := Parse("*/15 2 * * 1-5")
+	if err != nil {
+		t.Fatal(err)
+	}
+	monday := time.Date(2026, 6, 15, 2, 30, 0, 0, time.UTC)
+	if !expr.Matches(monday) {
+		t.Fatal("expected expression to match")
+	}
+	next := expr.Next(time.Date(2026, 6, 15, 2, 31, 0, 0, time.UTC))
+	want := time.Date(2026, 6, 15, 2, 45, 0, 0, time.UTC)
+	if !next.Equal(want) {
+		t.Fatalf("next = %v, want %v", next, want)
+	}
+}
+
+func TestCronRejectsInvalid(t *testing.T) {
+	for _, value := range []string{"", "* * * *", "61 * * * *", "*/0 * * * *"} {
+		if _, err := Parse(value); err == nil {
+			t.Fatalf("accepted invalid cron %q", value)
+		}
+	}
+}
+
+func TestPreviousWithinCatchUpWindow(t *testing.T) {
+	expr, err := Parse("0 2 * * *")
+	if err != nil {
+		t.Fatal(err)
+	}
+	now := time.Date(2026, 6, 13, 8, 30, 0, 0, time.UTC)
+	want := time.Date(2026, 6, 13, 2, 0, 0, 0, time.UTC)
+	if got := previous(expr, now, 24*time.Hour); !got.Equal(want) {
+		t.Fatalf("previous = %v, want %v", got, want)
+	}
+	if got := previous(expr, now, 2*time.Hour); !got.IsZero() {
+		t.Fatalf("unexpected catch-up match %v", got)
+	}
+}