added datetime macros

tools/search/identifier_macros_test.go

@@ -0,0 +1,56 @@
+package search
+
+import (
+	"testing"
+	"time"
+)
+
+func TestIdentifierMacros(t *testing.T) {
+	originalTimeNow := timeNow
+
+	timeNow = func() time.Time {
+		return time.Date(2023, 2, 3, 4, 5, 6, 7, time.UTC)
+	}
+
+	testMacros := map[string]any{
+		"@now":        "2023-02-03 04:05:06.000Z",
+		"@second":     6,
+		"@minute":     5,
+		"@hour":       4,
+		"@day":        3,
+		"@month":      2,
+		"@weekday":    5,
+		"@year":       2023,
+		"@todayStart": "2023-02-03 00:00:00.000Z",
+		"@todayEnd":   "2023-02-03 23:59:59.999Z",
+		"@monthStart": "2023-02-01 00:00:00.000Z",
+		"@monthEnd":   "2023-02-28 23:59:59.999Z",
+		"@yearStart":  "2023-01-01 00:00:00.000Z",
+		"@yearEnd":    "2023-12-31 23:59:59.999Z",
+	}
+
+	if len(testMacros) != len(identifierMacros) {
+		t.Fatalf("Expected %d macros, got %d", len(testMacros), len(identifierMacros))
+	}
+
+	for key, expected := range testMacros {
+		t.Run(key, func(t *testing.T) {
+			macro, ok := identifierMacros[key]
+			if !ok {
+				t.Fatalf("Missing macro %s", key)
+			}
+
+			result, err := macro()
+			if err != nil {
+				t.Fatal(err)
+			}
+
+			if result != expected {
+				t.Fatalf("Expected %q, got %q", expected, result)
+			}
+		})
+	}
+
+	// restore
+	timeNow = originalTimeNow
+}