1 files changed, 75 insertions, 0 deletions
diff --git a/toolkit/components/osfile/tests/xpcshell/test_open.js b/toolkit/components/osfile/tests/xpcshell/test_open.js
new file mode 100644
index 0000000000..6b0c6d8b90
--- /dev/null
+++ b/toolkit/components/osfile/tests/xpcshell/test_open.js
@@ -0,0 +1,75 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const { OS } = ChromeUtils.import("resource://gre/modules/osfile.jsm");
+
+/**
+ * Test OS.File.open for reading:
+ * - with an existing file (should succeed);
+ * - with a non-existing file (should fail);
+ * - with inconsistent arguments (should fail).
+ */
+add_task(async function() {
+  // Attempt to open a file that does not exist, ensure that it yields the
+  // appropriate error.
+  try {
+    await OS.File.open(OS.Path.join(".", "This file does not exist"));
+    Assert.ok(false, "File opening 1 succeeded (it should fail)");
+  } catch (err) {
+    if (err instanceof OS.File.Error && err.becauseNoSuchFile) {
+      info("File opening 1 failed " + err);
+    } else {
+      throw err;
+    }
+  }
+  // Attempt to open a file with the wrong args, so that it fails before
+  // serialization, ensure that it yields the appropriate error.
+  info("Attempting to open a file with wrong arguments");
+  try {
+    let fd = await OS.File.open(1, 2, 3);
+    Assert.ok(false, "File opening 2 succeeded (it should fail)" + fd);
+  } catch (err) {
+    info("File opening 2 failed " + err);
+    Assert.equal(
+      false,
+      err instanceof OS.File.Error,
+      "File opening 2 returned something that is not a file error"
+    );
+    Assert.ok(
+      err.constructor.name == "TypeError",
+      "File opening 2 returned a TypeError"
+    );
+  }
+
+  // Attempt to open a file correctly
+  info("Attempting to open a file correctly");
+  let openedFile = await OS.File.open(
+    OS.Path.join(do_get_cwd().path, "test_open.js")
+  );
+  info("File opened correctly");
+
+  info("Attempting to close a file correctly");
+  await openedFile.close();
+
+  info("Attempting to close a file again");
+  await openedFile.close();
+});
+
+/**
+ * Test the error thrown by OS.File.open when attempting to open a directory
+ * that does not exist.
+ */
+add_task(async function test_error_attributes() {
+  let dir = OS.Path.join(do_get_profile().path, "test_osfileErrorAttrs");
+  let fpath = OS.Path.join(dir, "test_error_attributes.txt");
+
+  try {
+    await OS.File.open(fpath, { truncate: true }, {});
+    Assert.ok(false, "Opening path suceeded (it should fail) " + fpath);
+  } catch (err) {
+    Assert.ok(err instanceof OS.File.Error);
+    Assert.ok(err.becauseNoSuchFile);
+  }
+});