move all tests under tests/ (#3)

codex-cli/tests/parse-apply-patch.test.ts

@@ -0,0 +1,45 @@
+import { parseApplyPatch } from "../src/lib/parse-apply-patch";
+import { expect, test, describe } from "vitest";
+
+// Helper function to unwrap a non‑null result in tests that expect success.
+function mustParse(patch: string) {
+  const parsed = parseApplyPatch(patch);
+  if (parsed == null) {
+    throw new Error(
+      "Expected patch to be valid, but parseApplyPatch returned null",
+    );
+  }
+  return parsed;
+}
+
+describe("parseApplyPatch", () => {
+  test("parses create, update and delete operations in a single patch", () => {
+    const patch = `*** Begin Patch\n*** Add File: created.txt\n+hello\n+world\n*** Update File: updated.txt\n@@\n-old\n+new\n*** Delete File: removed.txt\n*** End Patch`;
+
+    const ops = mustParse(patch);
+
+    expect(ops).toEqual([
+      {
+        type: "create",
+        path: "created.txt",
+        content: "hello\nworld",
+      },
+      {
+        type: "update",
+        path: "updated.txt",
+        update: "@@\n-old\n+new",
+        added: 1,
+        deleted: 1,
+      },
+      {
+        type: "delete",
+        path: "removed.txt",
+      },
+    ]);
+  });
+
+  test("returns null for an invalid patch (missing prefix)", () => {
+    const invalid = `*** Add File: foo.txt\n+bar\n*** End Patch`;
+    expect(parseApplyPatch(invalid)).toBeNull();
+  });
+});