1 files changed, 108 insertions, 0 deletions
diff --git a/cli/js/tests/realpath_test.ts b/cli/js/tests/realpath_test.ts
new file mode 100644
index 000000000..cda7ddaf1
--- /dev/null
+++ b/cli/js/tests/realpath_test.ts
@@ -0,0 +1,108 @@
+// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
+import { unitTest, assert } from "./test_util.ts";
+
+unitTest({ perms: { read: true } }, function realpathSyncSuccess(): void {
+  const incompletePath = "cli/tests/fixture.json";
+  const realPath = Deno.realpathSync(incompletePath);
+  if (Deno.build.os !== "win") {
+    assert(realPath.startsWith("/"));
+  } else {
+    assert(/^[A-Z]/.test(realPath));
+  }
+  assert(realPath.endsWith(incompletePath));
+});
+
+unitTest(
+  {
+    skip: Deno.build.os === "win",
+    perms: { read: true, write: true }
+  },
+  function realpathSyncSymlink(): void {
+    const testDir = Deno.makeTempDirSync();
+    const target = testDir + "/target";
+    const symlink = testDir + "/symln";
+    Deno.mkdirSync(target);
+    Deno.symlinkSync(target, symlink);
+    const targetPath = Deno.realpathSync(symlink);
+    assert(targetPath.startsWith("/"));
+    assert(targetPath.endsWith("/target"));
+  }
+);
+
+unitTest({ perms: { read: false } }, function realpathSyncPerm(): void {
+  let caughtError = false;
+  try {
+    Deno.realpathSync("some_file");
+  } catch (e) {
+    caughtError = true;
+    assert(e instanceof Deno.errors.PermissionDenied);
+  }
+  assert(caughtError);
+});
+
+unitTest({ perms: { read: true } }, function realpathSyncNotFound(): void {
+  let caughtError = false;
+  try {
+    Deno.realpathSync("bad_filename");
+  } catch (e) {
+    caughtError = true;
+    assert(e instanceof Deno.errors.NotFound);
+  }
+  assert(caughtError);
+});
+
+unitTest({ perms: { read: true } }, async function realpathSuccess(): Promise<
+  void
+> {
+  const incompletePath = "cli/tests/fixture.json";
+  const realPath = await Deno.realpath(incompletePath);
+  if (Deno.build.os !== "win") {
+    assert(realPath.startsWith("/"));
+  } else {
+    assert(/^[A-Z]/.test(realPath));
+  }
+  assert(realPath.endsWith(incompletePath));
+});
+
+unitTest(
+  {
+    skip: Deno.build.os === "win",
+    perms: { read: true, write: true }
+  },
+  async function realpathSymlink(): Promise<void> {
+    const testDir = Deno.makeTempDirSync();
+    const target = testDir + "/target";
+    const symlink = testDir + "/symln";
+    Deno.mkdirSync(target);
+    Deno.symlinkSync(target, symlink);
+    const targetPath = await Deno.realpath(symlink);
+    assert(targetPath.startsWith("/"));
+    assert(targetPath.endsWith("/target"));
+  }
+);
+
+unitTest({ perms: { read: false } }, async function realpathPerm(): Promise<
+  void
+> {
+  let caughtError = false;
+  try {
+    await Deno.realpath("some_file");
+  } catch (e) {
+    caughtError = true;
+    assert(e instanceof Deno.errors.PermissionDenied);
+  }
+  assert(caughtError);
+});
+
+unitTest({ perms: { read: true } }, async function realpathNotFound(): Promise<
+  void
+> {
+  let caughtError = false;
+  try {
+    await Deno.realpath("bad_filename");
+  } catch (e) {
+    caughtError = true;
+    assert(e instanceof Deno.errors.NotFound);
+  }
+  assert(caughtError);
+});