public void TextNavigator_Move_1()
{
const string text = "ABC";
TextNavigator navigator = new TextNavigator(text);
Assert.AreSame(navigator, navigator.Move(2));
Assert.AreEqual(2, navigator.Position);
Assert.AreSame(navigator, navigator.Move(-2));
Assert.AreEqual(0, navigator.Position);
}
public void TextNavigator_ReadWord_1()
{
TextNavigator navigator = new TextNavigator("Hello, world!");
Assert.AreEqual("Hello", navigator.ReadWord());
Assert.AreEqual(string.Empty, navigator.ReadWord());
navigator.Move(2);
Assert.AreEqual("world", navigator.ReadWord());
Assert.AreEqual(string.Empty, navigator.ReadWord());
navigator.Move(2);
Assert.IsNull(navigator.ReadWord());
}
public void TextNavigator_ReadWord_2()
{
char[] additional = { '<', '>' };
TextNavigator navigator = new TextNavigator("<Hello>, world!");
Assert.AreEqual("<Hello>", navigator.ReadWord(additional));
Assert.AreEqual(string.Empty, navigator.ReadWord(additional));
navigator.Move(2);
Assert.AreEqual("world", navigator.ReadWord(additional));
Assert.AreEqual(string.Empty, navigator.ReadWord(additional));
navigator.Move(2);
Assert.IsNull(navigator.ReadWord(additional));
}
public void TextNavigator_RecentText_1()
{
TextNavigator navigator = new TextNavigator("Hello, world!");
Assert.AreEqual(string.Empty, navigator.RecentText(4));
navigator.Move(4);
Assert.AreEqual(string.Empty, navigator.RecentText(-1));
Assert.AreEqual("Hell", navigator.RecentText(4));
navigator.Move(9);
Assert.AreEqual("rld!", navigator.RecentText(4));
Assert.AreEqual("Hello, world!", navigator.RecentText(20));
navigator.Move(9);
Assert.AreEqual(string.Empty, navigator.RecentText(1));
}
public void TextNavigator_SkipWhile_1()
{
TextNavigator navigator = new TextNavigator("111ABC");
Assert.IsTrue(navigator.SkipWhile('1'));
Assert.AreEqual('A', navigator.ReadChar());
navigator.Move(2);
Assert.IsFalse(navigator.SkipWhile('1'));
}
public void TextNavigator_SkipRange_1()
{
TextNavigator navigator = new TextNavigator("123ABC");
Assert.IsTrue(navigator.SkipRange('0', '9'));
Assert.AreEqual('A', navigator.ReadChar());
navigator.Move(2);
Assert.IsFalse(navigator.SkipRange('0', '9'));
}
public void TextNavigator_SkipPunctuation_1()
{
TextNavigator navigator = new TextNavigator(".,ABC");
Assert.IsTrue(navigator.SkipPunctuation());
Assert.AreEqual('A', navigator.ReadChar());
navigator.Move(2);
Assert.IsFalse(navigator.SkipPunctuation());
}
public void TextNavigator_SkipControl_1()
{
TextNavigator navigator = new TextNavigator("\t\tABC");
Assert.IsTrue(navigator.SkipControl());
Assert.AreEqual('A', navigator.ReadChar());
navigator.Move(2);
Assert.IsFalse(navigator.SkipControl());
}
public void TextNavigator_ReadWhile_1()
{
TextNavigator navigator = new TextNavigator("111234");
Assert.AreEqual("111", navigator.ReadWhile('1'));
Assert.AreEqual(string.Empty, navigator.ReadWhile('1'));
navigator.Move(3);
Assert.IsNull(navigator.ReadWhile('1'));
}
public void TextNavigator_SkipWhile_2()
{
char[] digits = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9' };
TextNavigator navigator = new TextNavigator("314ABC");
Assert.IsTrue(navigator.SkipWhile(digits));
Assert.AreEqual('A', navigator.ReadChar());
navigator.Move(2);
Assert.IsFalse(navigator.SkipWhile(digits));
}
public void TextNavigator_ReadWhile_2()
{
const string text1 = "314abc";
char[] good = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9' };
TextNavigator navigator = new TextNavigator(text1);
Assert.AreEqual("314", navigator.ReadWhile(good));
Assert.AreEqual(string.Empty, navigator.ReadWhile(good));
navigator.Move(3);
Assert.IsNull(navigator.ReadWhile(good));
}
public void TextNavigator_PeekUntil_1()
{
const string text = "ABC]DEF";
TextNavigator navigator = new TextNavigator(text);
Assert.AreEqual("ABC", navigator.PeekUntil(']'));
navigator.ReadChar();
Assert.AreEqual("BC", navigator.PeekUntil(']'));
navigator.ReadChar();
navigator.ReadChar();
Assert.AreEqual(string.Empty, navigator.PeekUntil(']'));
navigator.ReadChar();
Assert.AreEqual("DEF", navigator.PeekUntil(']'));
navigator.Move(3);
Assert.IsNull(navigator.PeekUntil(']'));
}
public void TextNavigator_PeekUntil_2()
{
const string text = "ABC]DE+F";
char[] stop = { ']', '+' };
TextNavigator navigator = new TextNavigator(text);
Assert.AreEqual("ABC", navigator.PeekUntil(stop));
navigator.ReadChar();
Assert.AreEqual("BC", navigator.PeekUntil(stop));
navigator.ReadChar();
navigator.ReadChar();
Assert.AreEqual(string.Empty, navigator.PeekUntil(stop));
navigator.ReadChar();
Assert.AreEqual("DE", navigator.PeekUntil(stop));
navigator.Move(3);
Assert.AreEqual("F", navigator.PeekUntil(stop));
navigator.ReadChar();
Assert.IsNull(navigator.PeekUntil(stop));
}
