1 files changed, 114 insertions, 0 deletions
diff --git a/tests/unit/real_path_test.ts b/tests/unit/real_path_test.ts
new file mode 100644
index 000000000..b3656a927
--- /dev/null
+++ b/tests/unit/real_path_test.ts
@@ -0,0 +1,114 @@
+// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
+import {
+  assert,
+  assertEquals,
+  assertMatch,
+  assertRejects,
+  assertThrows,
+  pathToAbsoluteFileUrl,
+} from "./test_util.ts";
+
+Deno.test({ permissions: { read: true } }, function realPathSyncSuccess() {
+  const relative = "tests/testdata/assets/fixture.json";
+  const realPath = Deno.realPathSync(relative);
+  if (Deno.build.os !== "windows") {
+    assert(realPath.startsWith("/"));
+    assert(realPath.endsWith(relative));
+  } else {
+    assertMatch(realPath, /^[A-Z]:\\/);
+    assert(realPath.endsWith(relative.replace(/\//g, "\\")));
+  }
+});
+
+Deno.test({ permissions: { read: true } }, function realPathSyncUrl() {
+  const relative = "tests/testdata/assets/fixture.json";
+  const url = pathToAbsoluteFileUrl(relative);
+  assertEquals(Deno.realPathSync(relative), Deno.realPathSync(url));
+});
+
+Deno.test(
+  {
+    permissions: { read: true, write: true },
+  },
+  function realPathSyncSymlink() {
+    const testDir = Deno.makeTempDirSync();
+    const target = testDir + "/target";
+    const symlink = testDir + "/symln";
+    Deno.mkdirSync(target);
+    Deno.symlinkSync(target, symlink);
+    const realPath = Deno.realPathSync(symlink);
+    if (Deno.build.os !== "windows") {
+      assert(realPath.startsWith("/"));
+      assert(realPath.endsWith("/target"));
+    } else {
+      assertMatch(realPath, /^[A-Z]:\\/);
+      assert(realPath.endsWith("\\target"));
+    }
+  },
+);
+
+Deno.test({ permissions: { read: false } }, function realPathSyncPerm() {
+  assertThrows(() => {
+    Deno.realPathSync("some_file");
+  }, Deno.errors.PermissionDenied);
+});
+
+Deno.test({ permissions: { read: true } }, function realPathSyncNotFound() {
+  assertThrows(() => {
+    Deno.realPathSync("bad_filename");
+  }, Deno.errors.NotFound);
+});
+
+Deno.test({ permissions: { read: true } }, async function realPathSuccess() {
+  const relativePath = "tests/testdata/assets/fixture.json";
+  const realPath = await Deno.realPath(relativePath);
+  if (Deno.build.os !== "windows") {
+    assert(realPath.startsWith("/"));
+    assert(realPath.endsWith(relativePath));
+  } else {
+    assertMatch(realPath, /^[A-Z]:\\/);
+    assert(realPath.endsWith(relativePath.replace(/\//g, "\\")));
+  }
+});
+
+Deno.test(
+  { permissions: { read: true } },
+  async function realPathUrl() {
+    const relative = "tests/testdata/assets/fixture.json";
+    const url = pathToAbsoluteFileUrl(relative);
+    assertEquals(await Deno.realPath(relative), await Deno.realPath(url));
+  },
+);
+
+Deno.test(
+  {
+    permissions: { read: true, write: true },
+  },
+  async function realPathSymlink() {
+    const testDir = Deno.makeTempDirSync();
+    const target = testDir + "/target";
+    const symlink = testDir + "/symln";
+    Deno.mkdirSync(target);
+    Deno.symlinkSync(target, symlink);
+    const realPath = await Deno.realPath(symlink);
+    if (Deno.build.os !== "windows") {
+      assert(realPath.startsWith("/"));
+      assert(realPath.endsWith("/target"));
+    } else {
+      assertMatch(realPath, /^[A-Z]:\\/);
+      assert(realPath.endsWith("\\target"));
+    }
+  },
+);
+
+Deno.test({ permissions: { read: false } }, async function realPathPerm() {
+  await assertRejects(async () => {
+    await Deno.realPath("some_file");
+  }, Deno.errors.PermissionDenied);
+});
+
+Deno.test({ permissions: { read: true } }, async function realPathNotFound() {
+  await assertRejects(async () => {
+    await Deno.realPath("bad_filename");
+  }, Deno.errors.NotFound);
+});