1 files changed, 69 insertions, 0 deletions
diff --git a/cli/js/read_link_test.ts b/cli/js/read_link_test.ts
new file mode 100644
index 000000000..83a693e3b
--- /dev/null
+++ b/cli/js/read_link_test.ts
@@ -0,0 +1,69 @@
+// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
+import { testPerm, assert, assertEquals } from "./test_util.ts";
+
+testPerm({ write: true, read: true }, function readlinkSyncSuccess(): void {
+  const testDir = Deno.makeTempDirSync();
+  const target = testDir + "/target";
+  const symlink = testDir + "/symln";
+  Deno.mkdirSync(target);
+  // TODO Add test for Windows once symlink is implemented for Windows.
+  // See https://github.com/denoland/deno/issues/815.
+  if (Deno.build.os !== "win") {
+    Deno.symlinkSync(target, symlink);
+    const targetPath = Deno.readlinkSync(symlink);
+    assertEquals(targetPath, target);
+  }
+});
+
+testPerm({ read: false }, async function readlinkSyncPerm(): Promise<void> {
+  let caughtError = false;
+  try {
+    Deno.readlinkSync("/symlink");
+  } catch (e) {
+    caughtError = true;
+    assertEquals(e.kind, Deno.ErrorKind.PermissionDenied);
+    assertEquals(e.name, "PermissionDenied");
+  }
+  assert(caughtError);
+});
+
+testPerm({ read: true }, function readlinkSyncNotFound(): void {
+  let caughtError = false;
+  let data;
+  try {
+    data = Deno.readlinkSync("bad_filename");
+  } catch (e) {
+    caughtError = true;
+    assertEquals(e.kind, Deno.ErrorKind.NotFound);
+  }
+  assert(caughtError);
+  assertEquals(data, undefined);
+});
+
+testPerm({ write: true, read: true }, async function readlinkSuccess(): Promise<
+  void
+> {
+  const testDir = Deno.makeTempDirSync();
+  const target = testDir + "/target";
+  const symlink = testDir + "/symln";
+  Deno.mkdirSync(target);
+  // TODO Add test for Windows once symlink is implemented for Windows.
+  // See https://github.com/denoland/deno/issues/815.
+  if (Deno.build.os !== "win") {
+    Deno.symlinkSync(target, symlink);
+    const targetPath = await Deno.readlink(symlink);
+    assertEquals(targetPath, target);
+  }
+});
+
+testPerm({ read: false }, async function readlinkPerm(): Promise<void> {
+  let caughtError = false;
+  try {
+    await Deno.readlink("/symlink");
+  } catch (e) {
+    caughtError = true;
+    assertEquals(e.kind, Deno.ErrorKind.PermissionDenied);
+    assertEquals(e.name, "PermissionDenied");
+  }
+  assert(caughtError);
+});