import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

toolkit/components/osfile/tests/xpcshell/test_open.js

@@ -0,0 +1,70 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+Components.utils.import("resource://gre/modules/osfile.jsm");
+
+function run_test() {
+  run_next_test();
+}
+
+/**
+ * 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(function() {
+  // Attempt to open a file that does not exist, ensure that it yields the
+  // appropriate error.
+  try {
+    let fd = yield OS.File.open(OS.Path.join(".", "This file does not exist"));
+    do_check_true(false, "File opening 1 succeeded (it should fail)");
+  } catch (err if err instanceof OS.File.Error && err.becauseNoSuchFile) {
+    do_print("File opening 1 failed " + err);
+  }
+
+  // Attempt to open a file with the wrong args, so that it fails before
+  // serialization, ensure that it yields the appropriate error.
+  do_print("Attempting to open a file with wrong arguments");
+  try {
+    let fd = yield OS.File.open(1, 2, 3);
+    do_check_true(false, "File opening 2 succeeded (it should fail)" + fd);
+  } catch (err) {
+    do_print("File opening 2 failed " + err);
+    do_check_false(err instanceof OS.File.Error,
+                   "File opening 2 returned something that is not a file error");
+    do_check_true(err.constructor.name == "TypeError",
+                  "File opening 2 returned a TypeError");
+  }
+
+  // Attempt to open a file correctly
+  do_print("Attempting to open a file correctly");
+  let openedFile = yield OS.File.open(OS.Path.join(do_get_cwd().path, "test_open.js"));
+  do_print("File opened correctly");
+
+  do_print("Attempting to close a file correctly");
+  yield openedFile.close();
+
+  do_print("Attempting to close a file again");
+  yield openedFile.close();
+});
+
+/**
+ * Test the error thrown by OS.File.open when attempting to open a directory
+ * that does not exist.
+ */
+add_task(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 {
+    yield OS.File.open(fpath, {truncate: true}, {});
+    do_check_true(false, "Opening path suceeded (it should fail) " + fpath);
+  } catch (err) {
+    do_check_true(err instanceof OS.File.Error);
+    do_check_true(err.becauseNoSuchFile);
+  }
+});