Initial Commit

packages/security-stack/security/x509/src/asn1/time.test.ts

@@ -0,0 +1,37 @@
+import { describe, expect, it } from "@suaveplan/testing/runner";
+import { UNIVERSAL_TAGS } from "./asn1.types.js";
+import { decodeGeneralizedTime, decodeUtcTime, encodeTime } from "./time.js";
+
+describe("Time codec", () => {
+    it("UTCTime 50/49 split — YY < 50 resolves to 20YY", {
+        timeout: 5000,
+    }, () => {
+        const ms = decodeUtcTime(new TextEncoder().encode("250101000000Z"));
+        expect(ms).toBe(Date.UTC(2025, 0, 1));
+    });
+
+    it("UTCTime 50/49 split — YY >= 50 resolves to 19YY", {
+        timeout: 5000,
+    }, () => {
+        const ms = decodeUtcTime(new TextEncoder().encode("750101000000Z"));
+        expect(ms).toBe(Date.UTC(1975, 0, 1));
+    });
+
+    it("GeneralizedTime requires Z", { timeout: 5000 }, () => {
+        expect(() =>
+            decodeGeneralizedTime(new TextEncoder().encode("20250101000000"))
+        ).toThrow();
+    });
+
+    it("encodeTime picks UTCTime before 2050", { timeout: 5000 }, () => {
+        const out = encodeTime(Date.UTC(2024, 0, 15));
+        expect(out.tagNumber).toBe(UNIVERSAL_TAGS.UTC_TIME);
+    });
+
+    it("encodeTime picks GeneralizedTime at/after 2050", {
+        timeout: 5000,
+    }, () => {
+        const out = encodeTime(Date.UTC(2055, 0, 15));
+        expect(out.tagNumber).toBe(UNIVERSAL_TAGS.GENERALIZED_TIME);
+    });
+});