Migrated test block 27 to Dart 2.0.

tests/corelib/string_buffer_test.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.
-
-import "package:expect/expect.dart";
-
-// TODO(srdjan): Move StringBuffer to visible names.
-
-void testConstructor() {
-  StringBuffer bf = new StringBuffer("");
-  testBufferLength(0, bf);
-
-  bf = new StringBuffer("abc");
-  testBufferLength(3, bf);
-  Expect.equals("abc", bf.toString());
-
-  bf = new StringBuffer("\x00");
-}
-
-void testWrite() {
-  StringBuffer bf = new StringBuffer("");
-  Expect.equals(true, bf.isEmpty);
-
-  bf.write("a");
-  testBufferLength(1, bf);
-  Expect.equals("a", bf.toString());
-
-  bf = new StringBuffer("");
-  bf.write("a");
-  bf.write("b");
-  Expect.equals("ab", bf.toString());
-
-  bf = new StringBuffer("abc");
-  bf.write("d");
-  bf.write("e");
-  bf.write("f");
-  bf.write("g");
-  bf.write("h");
-  bf.write("i");
-  bf.write("j");
-  bf.write("k");
-  bf.write("l");
-  bf.write("m");
-  bf.write("n");
-  bf.write("o");
-  bf.write("p");
-  bf.write("q");
-  bf.write("r");
-  bf.write("s");
-  bf.write("t");
-  bf.write("u");
-  bf.write("v");
-  bf.write("w");
-  bf.write("x");
-  bf.write("y");
-  bf.write("z");
-  bf.write("\n");
-  bf.write("thequickbrownfoxjumpsoverthelazydog");
-  Expect.equals(
-      "abcdefghijklmnopqrstuvwxyz\n"
-      "thequickbrownfoxjumpsoverthelazydog",
-      bf.toString());
-
-  bf = new StringBuffer("");
-  for (int i = 0; i < 100000; i++) {
-    bf.write('');
-    bf.write("");
-  }
-  Expect.equals("", bf.toString());
-}
-
-void testLength() {
-  StringBuffer bf = new StringBuffer("");
-  testBufferLength(0, bf);
-  bf.write("foo");
-  testBufferLength(3, bf);
-  bf.write("bar");
-  testBufferLength(6, bf);
-  bf.write("");
-  testBufferLength(6, bf);
-}
-
-void testIsEmpty() {
-  StringBuffer bf = new StringBuffer("");
-  Expect.equals(true, bf.isEmpty);
-  bf.write("foo");
-  Expect.equals(false, bf.isEmpty);
-}
-
-void testWriteAll() {
-  StringBuffer bf = new StringBuffer("");
-  bf.writeAll(["foo", "bar", "a", "b", "c"]);
-  Expect.equals("foobarabc", bf.toString());
-
-  bf.writeAll([]);
-  Expect.equals("foobarabc", bf.toString());
-
-  bf.writeAll(["", "", ""]);
-  Expect.equals("foobarabc", bf.toString());
-
-  bf.writeAll(["", "", ""], "");
-  Expect.equals("foobarabc", bf.toString());
-
-  StringBuffer bf2 = new StringBuffer("");
-  bf2.writeAll([], "s");
-  Expect.equals("", bf2.toString());
-
-  StringBuffer bf3 = new StringBuffer("");
-  bf3.writeAll(["a"], "s");
-  Expect.equals("a", bf3.toString());
-
-  StringBuffer bf4 = new StringBuffer("");
-  bf4.writeAll(["a", "b"], "s");
-  Expect.equals("asb", bf4.toString());
-}
-
-void testWriteAll2() {
-  // Passing `null` for separator is an error that is checked when the iterable
-  // is not empty.  This is not specified in the documentation but we want
-  // implementations to be consistent.
-  StringBuffer bf1 = new StringBuffer("");
-  bf1.writeAll([], null);
-  Expect.equals("", bf1.toString());
-
-  StringBuffer bf2 = new StringBuffer("");
-  Expect.throws(() {
-    bf2.writeAll([1], null);
-  });
-}
-
-void testWriteln() {
-  StringBuffer bf1 = new StringBuffer("");
-  bf1.writeln("Hello");
-  Expect.equals("Hello\n", bf1.toString());
-
-  StringBuffer bf2 = new StringBuffer("");
-  bf2.writeln();
-  Expect.equals("\n", bf2.toString());
-
-  StringBuffer bf3 = new StringBuffer("");
-  bf3.writeln("\n");
-  bf3.writeln(null);
-  bf3.writeln(1);
-  Expect.equals("\n\nnull\n1\n", bf3.toString());
-}
-
-void testClear() {
-  StringBuffer bf = new StringBuffer("");
-  bf.write("foo");
-  bf.clear();
-  Expect.equals("", bf.toString());
-  testBufferLength(0, bf);
-
-  bf.write("bar");
-  Expect.equals("bar", bf.toString());
-  testBufferLength(3, bf);
-  bf.clear();
-  Expect.equals("", bf.toString());
-  testBufferLength(0, bf);
-}
-
-void testToString() {
-  StringBuffer bf = new StringBuffer("");
-  Expect.equals("", bf.toString());
-
-  bf = new StringBuffer("foo");
-  Expect.equals("foo", bf.toString());
-
-  bf = new StringBuffer("foo");
-  bf.write("bar");
-  Expect.equals("foobar", bf.toString());
-}
-
-void testChaining() {
-  StringBuffer bf = new StringBuffer("");
-  StringBuffer bf2 = new StringBuffer("");
-  bf2.write("bf2");
-  bf..write("foo")..write("bar")..write(bf2)..write(bf2)..write("toto");
-  Expect.equals("foobarbf2bf2toto", bf.toString());
-}
-
-void testWriteCharCode() {
-  StringBuffer bf1 = new StringBuffer();
-  StringBuffer bf2 = new StringBuffer();
-  bf1.write("a");
-  bf2.writeCharCode(0x61); // a
-  bf1.write("b");
-  bf2.writeCharCode(0x62); // b
-  bf1.write("c");
-  bf2.writeCharCode(0x63); // c
-  bf1.write(new String.fromCharCode(0xD823));
-  bf2.writeCharCode(0xD823);
-  bf1.write(new String.fromCharCode(0xDC23));
-  bf2.writeCharCode(0xDC23);
-  bf1.write("\u{1d49e}");
-  bf2.writeCharCode(0x1d49e);
-  bf1.write("\x00");
-  bf2.writeCharCode(0);
-  Expect.equals(bf1.toString(), bf2.toString());
-  Expect.equals("abc\u{18c23}\u{1d49e}\x00", bf2.toString());
-
-  // Mixing strings and char-codes.
-  bf1.clear();
-  bf1.write("abcde");
-  bf1.writeCharCode(0x61);
-  bf1.writeCharCode(0x62);
-  bf1.writeCharCode(0x63);
-  bf1.write("d");
-  bf1.writeCharCode(0x65);
-  Expect.equals("abcdeabcde", bf1.toString());
-
-  // Out-of-range character codes are not allowed.
-  Expect.throws(() {
-    bf2.writeCharCode(-1);
-  });
-  Expect.throws(() {
-    bf2.writeCharCode(0x110000);
-  });
-}
-
-void testBufferLength(int length, StringBuffer bf) {
-  Expect.equals(length, bf.length);
-  (length == 0 ? Expect.isTrue : Expect.isFalse)(bf.isEmpty);
-  (length != 0 ? Expect.isTrue : Expect.isFalse)(bf.isNotEmpty);
-}
-
-void main() {
-  testToString();
-  testConstructor();
-  testLength();
-  testIsEmpty();
-  testWrite();
-  testWriteCharCode();
-  testWriteAll();
-  testWriteAll2();
-  testWriteln();
-  testClear();
-  testChaining();
-}