Error reporting on File in dart:io

tests/standalone/src/io/FileErrorTest.dart

+// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+//
+// Dart test program for testing error handling in file I/O.
+
+#import("dart:io");
+#import("dart:isolate");
+
+String tempDir() {
+  var d = new Directory('');
+  d.createTempSync();
+  return d.path;
+}
+
+
+bool checkOpenNonExistentFileException(e) {
+  Expect.isTrue(e is FileIOException);
+  Expect.isTrue(e.osError != null);
+  Expect.isTrue(e.toString().indexOf("Cannot open file") != -1);
+  Platform platform = new Platform();
+  if (platform.operatingSystem() == "linux") {
+    Expect.isTrue(e.toString().indexOf("No such file or directory") != -1);
+  } else if (platform.operatingSystem() == "macos") {
+    Expect.isTrue(e.toString().indexOf("No such file or directory") != -1);
+  } else if (platform.operatingSystem() == "windows") {
+    Expect.isTrue(
+        e.toString().indexOf(
+            "The system cannot find the file specified") != -1);
+  }
+  // File not not found has error code 2 on all supported platforms.
+  Expect.equals(2, e.osError.errorCode);
+
+  return true;
+}
+
+void testOpenNonExistent() {
+  var file = new File("${tempDir()}/nonExistentFile");
+
+  // Non-existing file should throw exception.
+  Expect.throws(() => file.openSync(),
+                (e) => checkOpenNonExistentFileException(e));
+
+  file.open(FileMode.READ, (raf) => Expect.fail("Unreachable code"));
+  file.onError = (e) => checkOpenNonExistentFileException(e);
+}
+
+bool checkDeleteNonExistentFileException(e) {
+  Expect.isTrue(e is FileIOException);
+  Expect.isTrue(e.osError != null);
+  Expect.isTrue(e.toString().indexOf("Cannot delete file") != -1);
+  Platform platform = new Platform();
+  if (platform.operatingSystem() == "linux") {
+    Expect.isTrue(e.toString().indexOf("No such file or directory") != -1);
+  } else if (platform.operatingSystem() == "macos") {
+    Expect.isTrue(e.toString().indexOf("No such file or directory") != -1);
+  } else if (platform.operatingSystem() == "windows") {
+    Expect.isTrue(
+        e.toString().indexOf(
+            "The system cannot find the file specified") != -1);
+  }
+  // File not not found has error code 2 on all supported platforms.
+  Expect.equals(2, e.osError.errorCode);
+
+  return true;
+}
+
+void testDeleteNonExistent() {
+  var file = new File("${tempDir()}/nonExistentFile");
+
+  // Non-existing file should throw exception.
+  Expect.throws(() => file.deleteSync(),
+                (e) => checkDeleteNonExistentFileException(e));
+
+  file.delete(() => Expect.fail("Unreachable code"));
+  file.onError = (e) => checkDeleteNonExistentFileException(e);
+}
+
+bool checkCreateInNonExistentDirectoryException(e) {
+  Expect.isTrue(e is FileIOException);
+  Expect.isTrue(e.osError != null);
+  Expect.isTrue(e.toString().indexOf("Cannot create file") != -1);
+  Platform platform = new Platform();
+  if (platform.operatingSystem() == "linux") {
+    Expect.isTrue(e.toString().indexOf("No such file or directory") != -1);
+    Expect.equals(2, e.osError.errorCode);
+  } else if (platform.operatingSystem() == "macos") {
+    Expect.isTrue(e.toString().indexOf("No such file or directory") != -1);
+    Expect.equals(2, e.osError.errorCode);
+  } else if (platform.operatingSystem() == "windows") {
+    Expect.isTrue(
+        e.toString().indexOf(
+            "The system cannot find the path specified") != -1);
+    Expect.equals(3, e.osError.errorCode);
+  }
+
+  return true;
+}
+
+void testCreateInNonExistentDirectory() {
+  var file = new File("${tempDir()}/nonExistentDirectory/newFile");
+
+  // Create in non-existent directory should throw exception.
+  Expect.throws(() => file.createSync(),
+                (e) => checkCreateInNonExistentDirectoryException(e));
+
+  file.create(() => Expect.fail("Unreachable code"));
+  file.onError = (e) => checkCreateInNonExistentDirectoryException(e);
+}
+
+bool checkFullPathOnNonExistentDirectoryException(e) {
+  Expect.isTrue(e is FileIOException);
+  Expect.isTrue(e.osError != null);
+  Expect.isTrue(e.toString().indexOf("Cannot retrieve full path") != -1);
+  Platform platform = new Platform();
+  if (platform.operatingSystem() == "linux") {
+    Expect.isTrue(e.toString().indexOf("No such file or directory") != -1);
+  } else if (platform.operatingSystem() == "macos") {
+    Expect.isTrue(e.toString().indexOf("No such file or directory") != -1);
+  } else if (platform.operatingSystem() == "windows") {
+    Expect.isTrue(
+        e.toString().indexOf(
+            "The system cannot find the file specified") != -1);
+  }
+  // File not not found has error code 2 on all supported platforms.
+  Expect.equals(2, e.osError.errorCode);
+
+  return true;
+}
+
+void testFullPathOnNonExistentDirectory() {
+  var file = new File("${tempDir()}/nonExistentDirectory");
+
+  // Full path non-existent directory should throw exception.
+  Expect.throws(() => file.fullPathSync(),
+                (e) => checkFullPathOnNonExistentDirectoryException(e));
+
+  file.fullPath((path) => Expect.fail("Unreachable code $path"));
+  file.onError = (e) => checkFullPathOnNonExistentDirectoryException(e);
+}
+
+bool checkDirectoryInNonExistentDirectoryException(e) {
+  Expect.isTrue(e is FileIOException);
+  Expect.isTrue(e.osError != null);
+  Expect.isTrue(
+      e.toString().indexOf("Cannot retrieve directory for file") != -1);
+  Platform platform = new Platform();
+  if (platform.operatingSystem() == "linux") {
+    Expect.isTrue(e.toString().indexOf("No such file or directory") != -1);
+  } else if (platform.operatingSystem() == "macos") {
+    Expect.isTrue(e.toString().indexOf("No such file or directory") != -1);
+  } else if (platform.operatingSystem() == "windows") {
+    Expect.isTrue(
+        e.toString().indexOf(
+            "The system cannot find the file specified") != -1);
+  }
+  // File not not found has error code 2 on all supported platforms.
+  Expect.equals(2, e.osError.errorCode);
+
+  return true;
+}
+
+void testDirectoryInNonExistentDirectory() {
+  var file = new File("${tempDir()}/nonExistentDirectory/newFile");
+
+  // Create in non-existent directory should throw exception.
+  Expect.throws(() => file.directorySync(),
+                (e) => checkDirectoryInNonExistentDirectoryException(e));
+
+  file.directory((directory) => Expect.fail("Unreachable code"));
+  file.onError = (e) => checkDirectoryInNonExistentDirectoryException(e);
+}
+
+void testReadAsBytesNonExistent() {
+  var file = new File("${tempDir()}/nonExistentFile3");
+
+  // Non-existing file should throw exception.
+  Expect.throws(() => file.readAsBytesSync(),
+                (e) => checkOpenNonExistentFileException(e));
+
+  // TODO(sgjesse): Handle error for file.readAsBytes as well.
+}
+
+void testReadAsTextNonExistent() {
+  var file = new File("${tempDir()}/nonExistentFile4");
+
+  // Non-existing file should throw exception.
+  Expect.throws(() => file.readAsTextSync(),
+                (e) => checkOpenNonExistentFileException(e));
+
+  // TODO(sgjesse): Handle error for file.readAsText as well.
+}
+
+void testReadAsLinesNonExistent() {
+  var file = new File("${tempDir()}/nonExistentFile5");
+
+  // Non-existing file should throw exception.
+  Expect.throws(() => file.readAsLinesSync(),
+                (e) => checkOpenNonExistentFileException(e));
+
+  // TODO(sgjesse): Handle error for file.readAsLines as well.
+}
+
+main() {
+  testOpenNonExistent();
+  testDeleteNonExistent();
+  testCreateInNonExistentDirectory();
+  testFullPathOnNonExistentDirectory();
+  testDirectoryInNonExistentDirectory();
+  testReadAsBytesNonExistent();
+  testReadAsTextNonExistent();
+  testReadAsLinesNonExistent();
+}