Handling of wrong types of arguments in the File API.

tests/standalone/src/FileInvalidArgumentsTest.dart

+// Copyright (c) 2011, 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.
+
+class FileTest {
+  static void testOpenInvalidArgs(name, [writable = false]) {
+    var file = new File(name);
+    try {
+      file.openSync();
+      Expect.fail('exception expected');
+    } catch (var e) {
+      Expect.isTrue(e is FileIOException);
+      Expect.isTrue(e.toString().contains('open file'));
+    }
+
+    file.errorHandler = (s) {
+      Expect.isTrue(s.contains('open file'));
+    };
+    file.openHandler = () {
+      Expect.fail('non-string name open');
+    };
+    file.open();
+  }
+
+  static void testExistsInvalidArgs(name) {
+    var file = new File(name);
+    try {
+      file.existsSync();
+      Expect.fail('exception expected');
+    } catch (var e) {
+      Expect.isTrue(e is FileIOException);
+      Expect.isTrue(e.toString().contains('is not a string'));
+    }
+
+    file.errorHandler = (s) {
+      Expect.isTrue(s.contains('is not a string'));
+    };
+    file.existsHandler = (bool) {
+      Expect.fail('non-string name exists');
+    };
+    file.exists();
+  }
+
+  static void testCreateInvalidArgs(name) {
+    var file = new File(name);
+    try {
+      file.createSync();
+      Expect.fail('exception expected');
+    } catch (var e) {
+      Expect.isTrue(e is FileIOException);
+      Expect.isTrue(e.toString().contains('Cannot create file'));
+    }
+
+    file.errorHandler = (s) {
+      Expect.isTrue(s.contains('Cannot create file'));
+    };
+    file.createHandler = (created) {
+      Expect.fail('non-string name exists');
+    };
+    file.create();
+  }
+
+  static void testCloseNonOpened() {
+    var file = new File(0);
+    try {
+      file.closeSync();
+      Expect.fail('exception expected');
+    } catch (var e) {
+      Expect.isTrue(e is FileIOException);
+      Expect.isTrue(e.toString().contains('Cannot close file'));
+    }
+
+    file.errorHandler = (s) {
+      Expect.isTrue(s.contains('Cannot close file'));
+    };
+    file.closeHandler = () {
+      Expect.fail('close non-opened file');
+    };
+    file.close();
+  }
+
+  static void testReadListInvalidArgs(buffer, offset, length) {
+    String filename = getFilename("tests/vm/data/fixed_length_file");
+    var file = new File(filename);
+    file.openSync();
+    try {
+      file.readListSync(buffer, offset, length);
+      Expect.fail('exception expected');
+    } catch (var e) {
+      Expect.isTrue(e is FileIOException);
+      Expect.isTrue(e.toString().contains('Invalid arguments'));
+    }
+
+    var errors = 0;
+    file.errorHandler = (s) {
+      errors++;
+      Expect.isTrue(s.contains('Invalid arguments'));
+    };
+    file.readListHandler = (bytes) {
+      Expect.fail('read list invalid arguments');
+    };
+    file.readList(buffer, offset, length);
+    file.closeHandler = () {
+      Expect.equals(1, errors);
+    };
+    file.close();
+  }
+
+  static void testWriteByteInvalidArgs(value) {
+    String filename = getFilename("tests/vm/data/fixed_length_file");
+    var file = new File(filename + "_out");
+    file.openSync(true);
+    try {
+      file.writeByteSync(value);
+      Expect.fail('exception expected');
+    } catch (var e) {
+      Expect.isTrue(e is FileIOException);
+      Expect.isTrue(e.toString().contains('Invalid argument'));
+    }
+
+    var errors = 0;
+    file.errorHandler = (s) {
+      errors++;
+      Expect.isTrue(s.contains('Invalid argument'));
+    };
+    file.noPendingWriteHandler = (bytes) {
+      Expect.fail('write list invalid argument');
+    };
+    file.writeByte(value);
+    file.closeHandler = () {
+      Expect.equals(1, errors);
+    };
+    file.close();
+  }
+
+  static void testWriteListInvalidArgs(buffer, offset, bytes) {
+    String filename = getFilename("tests/vm/data/fixed_length_file");
+    var file = new File(filename + "_out");
+    file.openSync(true);
+    try {
+      file.writeListSync(buffer, offset, bytes);
+      Expect.fail('exception expected');
+    } catch (var e) {
+      Expect.isTrue(e is FileIOException);
+      Expect.isTrue(e.toString().contains('Invalid arguments'));
+    }
+
+    var errors = 0;
+    file.errorHandler = (s) {
+      errors++;
+      Expect.isTrue(s.contains('Invalid arguments'));
+    };
+    file.noPendingWriteHandler = (bytes) {
+      Expect.fail('write list invalid argument');
+    };
+    file.writeList(buffer, offset, bytes);
+    file.closeHandler = () {
+      Expect.equals(1, errors);
+    };
+    file.close();
+  }
+
+  static void testWriteStringInvalidArgs(string) {
+    String filename = getFilename("tests/vm/data/fixed_length_file");
+    var file = new File(filename + "_out");
+    file.openSync(true);
+    try {
+      file.writeString(string);
+      Expect.fail('exception expected');
+    } catch (var e) {
+      Expect.isTrue(e is FileIOException);
+      Expect.isTrue(e.toString().contains('writeString failed'));
+    }
+
+    var errors = 0;
+    file.errorHandler = (s) {
+      errors++;
+      Expect.isTrue(s.contains('writeString failed'));
+    };
+    file.noPendingWriteHandler = (bytes) {
+      Expect.fail('write string invalid argument');
+    };
+    file.writeString(string);
+    file.closeHandler = () {
+      Expect.equals(1, errors);
+    };
+    file.close();
+  }
+
+  static void testFullPathInvalidArgs(name) {
+    var file = new File(name);
+    try {
+      file.fullPathSync();
+      Expect.fail('exception expected');
+    } catch (var e) {
+      Expect.isTrue(e is FileIOException);
+      Expect.isTrue(e.toString().contains('fullPath failed'));
+    }
+
+    file.errorHandler = (s) {
+      Expect.isTrue(s.contains('fullPath failed'));
+    };
+    file.fullPathHandler = (path) {
+      Expect.fail('full path invalid argument');
+    };
+    file.fullPath();
+  }
+
+  static String getFilename(String path) =>
+      new File(path).existsSync() ? path : 'runtime/' + path;
+}
+
+main() {
+  FileTest.testOpenInvalidArgs(0);
+  FileTest.testOpenInvalidArgs('name', 0);
+  FileTest.testExistsInvalidArgs(0);
+  FileTest.testCreateInvalidArgs(0);
+  FileTest.testCloseNonOpened();
+  FileTest.testReadListInvalidArgs(12, 0, 1);
+  FileTest.testReadListInvalidArgs(new List(10), '0', 1);
+  FileTest.testReadListInvalidArgs(new List(10), 0, '1');
+  FileTest.testWriteByteInvalidArgs('asdf');
+  FileTest.testWriteListInvalidArgs(12, 0, 1);
+  FileTest.testWriteListInvalidArgs(new List(10), '0', 1);
+  FileTest.testWriteListInvalidArgs(new List(10), 0, '1');
+  FileTest.testFullPathInvalidArgs(12);
+}