test(process): skip POSIX observer errors on Windows

Refs #7281

Co-Authored-By: gensokyo-dev <342580529+gensokyo-dev@users.noreply.github.com>

src/process/capture/FilesystemCoverage.test.ts

@@ -656,36 +656,41 @@ it.each(["nested", "outside", "no-roots"] as const)(
   },
 );
 
-it("treats an observer path below a regular file as absent", async () => {
-  const fixture = await createTestTempDirectory("rea-observer-not-directory-");
-  const root = join(fixture, "selected");
-  const blocker = join(fixture, "blocker.txt");
-  await mkdir(root);
-  await writeFile(join(root, "kept.txt"), "retain me");
-  await writeFile(blocker, "not a directory");
-  const observerPath = join(blocker, "capture");
-  const scenario = processScenarioSchema.parse({
-    executable: process.execPath,
-    filesystem_observation_paths: [root],
-  });
-  try {
-    await expect(realpath(observerPath)).rejects.toMatchObject({
-      code: "ENOTDIR",
-    });
-    const snapshot = await snapshotRoots(scenario, undefined, undefined, {
-      observerPaths: [observerPath],
+it.skipIf(process.platform === "win32")(
+  "treats an observer path below a regular file as absent",
+  async () => {
+    const fixture = await createTestTempDirectory(
+      "rea-observer-not-directory-",
+    );
+    const root = join(fixture, "selected");
+    const blocker = join(fixture, "blocker.txt");
+    await mkdir(root);
+    await writeFile(join(root, "kept.txt"), "retain me");
+    await writeFile(blocker, "not a directory");
+    const observerPath = join(blocker, "capture");
+    const scenario = processScenarioSchema.parse({
+      executable: process.execPath,
+      filesystem_observation_paths: [root],
     });
+    try {
+      await expect(realpath(observerPath)).rejects.toMatchObject({
+        code: "ENOTDIR",
+      });
+      const snapshot = await snapshotRoots(scenario, undefined, undefined, {
+        observerPaths: [observerPath],
+      });
 
-    expect(snapshot.files.map(({ path }) => path).sort()).toEqual([
-      "root_0:.",
-      "root_0:kept.txt",
-    ]);
-    expect(snapshot.coverage.unobserved_subtrees).toEqual([]);
-    expect(snapshot.truncated).toBe(false);
-  } finally {
-    await rm(fixture, { recursive: true, force: true });
-  }
-});
+      expect(snapshot.files.map(({ path }) => path).sort()).toEqual([
+        "root_0:.",
+        "root_0:kept.txt",
+      ]);
+      expect(snapshot.coverage.unobserved_subtrees).toEqual([]);
+      expect(snapshot.truncated).toBe(false);
+    } finally {
+      await rm(fixture, { recursive: true, force: true });
+    }
+  },
+);
 
 it.skipIf(process.platform === "win32")(
   "propagates unexpected observer path resolution errors",