public void CharacterStreamConsumeAndLocationTest()
{
char EOF = new CharacterScanner("").EOF;
// A three line input containing embedded "EOF" characters (which should be skipped over)
string testInput = "A test\nof the " + EOF + EOF + " character stream.\nThree lines of stuff.";
ExpectedOutcome[] expected = { new ExpectedOutcome() {ch= 'A', loc= new StreamLocation( 0, 1, 1)},
new ExpectedOutcome() {ch= ' ', loc= new StreamLocation( 1, 1, 2)},
new ExpectedOutcome() {ch= 't', loc= new StreamLocation( 2, 1, 3)},
new ExpectedOutcome() {ch= 'e', loc= new StreamLocation( 3, 1, 4)},
new ExpectedOutcome() {ch= 's', loc= new StreamLocation( 4, 1, 5)},
new ExpectedOutcome() {ch= 't', loc= new StreamLocation( 5, 1, 6)},
new ExpectedOutcome() {ch= '\n', loc= new StreamLocation( 6, 1, 7)},
new ExpectedOutcome() {ch= 'o', loc= new StreamLocation( 7, 2, 1)},
new ExpectedOutcome() {ch= 'f', loc= new StreamLocation( 8, 2, 2)},
new ExpectedOutcome() {ch= ' ', loc= new StreamLocation( 9, 2, 3)},
new ExpectedOutcome() {ch= 't', loc= new StreamLocation(10, 2, 4)},
new ExpectedOutcome() {ch= 'h', loc= new StreamLocation(11, 2, 5)},
new ExpectedOutcome() {ch= 'e', loc= new StreamLocation(12, 2, 6)},
new ExpectedOutcome() {ch= ' ', loc= new StreamLocation(13, 2, 7)},
new ExpectedOutcome() {ch= ' ', loc= new StreamLocation(16, 2, 10)},
new ExpectedOutcome() {ch= 'c', loc= new StreamLocation(17, 2, 11)},
new ExpectedOutcome() {ch= 'h', loc= new StreamLocation(18, 2, 12)},
new ExpectedOutcome() {ch= 'a', loc= new StreamLocation(19, 2, 13)},
new ExpectedOutcome() {ch= 'r', loc= new StreamLocation(20, 2, 14)},
new ExpectedOutcome() {ch= 'a', loc= new StreamLocation(21, 2, 15)},
new ExpectedOutcome() {ch= 'c', loc= new StreamLocation(22, 2, 16)},
new ExpectedOutcome() {ch= 't', loc= new StreamLocation(23, 2, 17)},
new ExpectedOutcome() {ch= 'e', loc= new StreamLocation(24, 2, 18)},
new ExpectedOutcome() {ch= 'r', loc= new StreamLocation(25, 2, 19)},
new ExpectedOutcome() {ch= ' ', loc= new StreamLocation(26, 2, 20)},
new ExpectedOutcome() {ch= 's', loc= new StreamLocation(27, 2, 21)},
new ExpectedOutcome() {ch= 't', loc= new StreamLocation(28, 2, 22)},
new ExpectedOutcome() {ch= 'r', loc= new StreamLocation(29, 2, 23)},
new ExpectedOutcome() {ch= 'e', loc= new StreamLocation(30, 2, 24)},
new ExpectedOutcome() {ch= 'a', loc= new StreamLocation(31, 2, 25)},
new ExpectedOutcome() {ch= 'm', loc= new StreamLocation(32, 2, 26)},
new ExpectedOutcome() {ch= '.', loc= new StreamLocation(33, 2, 27)},
new ExpectedOutcome() {ch= '\n', loc= new StreamLocation(34, 2, 28)},
new ExpectedOutcome() {ch= 'T', loc= new StreamLocation(35, 3, 1)},
new ExpectedOutcome() {ch= 'h', loc= new StreamLocation(36, 3, 2)},
new ExpectedOutcome() {ch= 'r', loc= new StreamLocation(37, 3, 3)},
new ExpectedOutcome() {ch= 'e', loc= new StreamLocation(38, 3, 4)},
new ExpectedOutcome() {ch= 'e', loc= new StreamLocation(39, 3, 5)},
new ExpectedOutcome() {ch= ' ', loc= new StreamLocation(40, 3, 6)},
new ExpectedOutcome() {ch= 'l', loc= new StreamLocation(41, 3, 7)},
new ExpectedOutcome() {ch= 'i', loc= new StreamLocation(42, 3, 8)},
new ExpectedOutcome() {ch= 'n', loc= new StreamLocation(43, 3, 9)},
new ExpectedOutcome() {ch= 'e', loc= new StreamLocation(44, 3, 10)},
new ExpectedOutcome() {ch= 's', loc= new StreamLocation(45, 3, 11)},
new ExpectedOutcome() {ch= ' ', loc= new StreamLocation(46, 3, 12)},
new ExpectedOutcome() {ch= 'o', loc= new StreamLocation(47, 3, 13)},
new ExpectedOutcome() {ch= 'f', loc= new StreamLocation(48, 3, 14)},
new ExpectedOutcome() {ch= ' ', loc= new StreamLocation(49, 3, 15)},
new ExpectedOutcome() {ch= 's', loc= new StreamLocation(50, 3, 16)},
new ExpectedOutcome() {ch= 't', loc= new StreamLocation(51, 3, 17)},
new ExpectedOutcome() {ch= 'u', loc= new StreamLocation(52, 3, 18)},
new ExpectedOutcome() {ch= 'f', loc= new StreamLocation(53, 3, 19)},
new ExpectedOutcome() {ch= 'f', loc= new StreamLocation(54, 3, 20)},
new ExpectedOutcome() {ch= '.', loc= new StreamLocation(55, 3, 21)},
new ExpectedOutcome() {ch= EOF, loc= new StreamLocation(56, 3, 22)},
new ExpectedOutcome() {ch= EOF, loc= new StreamLocation(56, 3, 22)}
};
CharacterScanner sut = new CharacterScanner(testInput);
sut.Start();
int index = 0;
foreach (ExpectedOutcome it in expected)
{
StreamLocation loc = sut.Location;
char ch = sut.Consume();
Assert.AreEqual(it.ch, ch, String.Format("Unexpected character @ {0}", index));
Assert.AreEqual(it.loc, loc);
++index;
}
}
public void CharacterStreamResetTest()
{
string testInput = "abcdefghijklmnopqrstuvwxyz";
bool expectResp = false;
CharacterScanner sut = new CharacterScanner(testInput);
sut.Start();
for (int i = 0; i < 4; ++i) sut.Consume();
bool resp = sut.Reset();
Assert.AreEqual(expectResp, resp);
}
public void CharacterStreamPeekTest_ReadPastEnd()
{
// A three line input containing embedded "EOF" characters (which should be skipped over)
string testInput = "X";
CharacterScanner sut = new CharacterScanner(testInput);
sut.Start();
sut.Consume();
Assert.AreEqual(sut.EOF, sut.Peek());
}
public void CharacterStreamPeekTest()
{
string testInput = "abcdefghijklmnopqrstuvwxyz";
ExpectedOutcome expected = new ExpectedOutcome() { ch= 'e', loc= new StreamLocation(4, 1, 5) };
CharacterScanner sut = new CharacterScanner(testInput);
sut.Start();
for (int i = 0; i < 4; ++i) sut.Consume();
Assert.AreEqual(expected.ch, sut.Peek());
Assert.AreEqual(expected.loc, sut.Location);
Assert.AreEqual(expected.ch, sut.Peek(), "unexpected change!");
Assert.AreEqual(expected.loc, sut.Location, "unexpected change!");
}
public void CharacterStreamMatchTest_Success()
{
string testInput = "abcdefghijklmnopqrstuvwxyz";
char expected = 'e';
CharacterScanner sut = new CharacterScanner(testInput);
sut.Start();
for (int i = 0; i < 4; ++i) sut.Consume();
sut.Match(expected);
}
public void CharacterStreamIsEOFHasNextTest_AtEOF()
{
string testInput = "a";
bool expectEOF = true;
StreamLocation expectedLocation = new StreamLocation(1, 1, 2);
CharacterScanner sut = new CharacterScanner(testInput);
sut.Start();
sut.Consume();
Assert.AreEqual(expectEOF, sut.IsEOF(), "EOF expected");
Assert.AreEqual(!expectEOF, sut.HasNext(), "HasNext unexpected");
Assert.AreEqual(expectedLocation, sut.Location);
}
