test: fix Windows path assertions (#422)

Amp-Thread-ID:
https://ampcode.com/threads/T-01a0af62-d8be-7209-b38b-950badf6ef76

Closes: #394

Co-authored-by: Amp <amp@ampcode.com>

__tests__/download/download-version.test.ts

@@ -1,3 +1,4 @@
+import * as path from "node:path";
 import { beforeEach, describe, expect, it, jest } from "@jest/globals";
 import * as semver from "semver";
 
@@ -450,7 +451,7 @@ describe("download-version", () => {
 
       expect(mockExtractTar).toHaveBeenCalledWith("/tmp/downloaded");
       expect(mockCacheDir).toHaveBeenCalledWith(
-        "/tmp/extracted/ruff-x86_64-unknown-linux-gnu",
+        path.join("/tmp/extracted", "ruff-x86_64-unknown-linux-gnu"),
         "ruff",
         "0.15.8",
         "x86_64",

__tests__/utils/source-input.test.ts

@@ -17,6 +17,7 @@ const {
 const { findPyprojectToml } = await import("../../src/utils/pyproject-finder");
 
 let tempDir: string | undefined;
+const symlinkTest = process.platform === "win32" ? it.skip : it;
 
 afterEach(async () => {
   if (tempDir !== undefined) {
@@ -177,7 +178,7 @@ describe("expandSourceInput", () => {
     ]);
   });
 
-  it("does not traverse symlinked directories", async () => {
+  symlinkTest("does not traverse symlinked directories", async () => {
     const projectDir = await createTempProject();
     const externalDir = path.join(projectDir, "external");
     const symlinkPath = path.join(projectDir, "src", "linked");
@@ -368,7 +369,7 @@ describe("getSourceBasePath", () => {
 
   it("does not treat brace expansion as glob syntax", async () => {
     await expect(getSourceBasePath("src/{a,b}/*.py")).resolves.toBe(
-      "src/{a,b}",
+      path.join("src", "{a,b}"),
     );
   });
 });