public void Constructor_WhenGivenANullExpression_ThrowsException()
{
var start = new Cursor("OK");
var end = start.Advance(2);
var codeSpan = new CodeSpan("OK", start, end);
Assert.That(() => new TypedExpression(codeSpan, null), Throws.InstanceOf<ArgumentNullException>());
}
public void ToString_WhenConstructedWithANullValue_ReturnsTheCodeVerbatim()
{
var start = new Cursor("OK");
var end = start.Advance(2);
var codeSpan = new CodeSpan("OK", start, end);
Assert.That(codeSpan.ToString(), Is.EqualTo("OK"));
}
protected override IEnumerable<Token> Tokenize(string source)
{
Cursor c = new Cursor(source);
while (c.Offset < source.Length)
{
var currentChar = source[c.Offset];
if (operators.Contains(currentChar))
{
yield return new Token(c.Offset, c.Offset + 1, "Operator.Symbol");
c.Advance(1);
continue;
}
if (grouping.Contains(currentChar))
{
yield return new Token(c.Offset, c.Offset + 1, "Grouping.Statements");
c.Advance(1);
continue;
}
var match = whitespace.Match(source, c.Offset);
if (match.Success && match.Index == c.Offset)
{
yield return new Token(c.Offset, c.Offset + match.Length, "Whitespace.Insignificant");
c.Advance(match.Length);
continue;
}
match = nonOperator.Match(source, c.Offset);
yield return new Token(c.Offset, c.Offset + match.Length, "Comment.Block");
c.Advance(match.Length);
}
}
public void Advance_WhenAdvancingPastTheEndOfTheText_ThrowsException()
{
var subject = "OK_OK_OK_OK_OK";
var cursor = new Cursor(subject);
cursor.Advance(subject.Length);
Assert.That(() => cursor.Advance(1), Throws.InstanceOf<InvalidOperationException>());
}
public void Constructor_WhenGivenANullSettingsCollection_DoesNotThrow()
{
var start = new Cursor("OK");
var end = start.Advance(2);
Assert.That(() => new Grammar(new Rule[0], null, end), Throws.Nothing);
}
public void Constructor_WhenGivenANullCollectionOfRules_ThrowsException()
{
var start = new Cursor("OK");
var end = start.Advance(2);
Assert.That(() => new Grammar(null, new Dictionary<Identifier, object>(), end), Throws.InstanceOf<ArgumentNullException>());
}
public void Constructor_WhenGivenANullValue_ThrowsException(bool ignoreCase, bool fromResource)
{
var start = new Cursor("OK");
var end = start.Advance(2);
Assert.That(() => new LiteralExpression(start, end, null, ignoreCase, fromResource), Throws.InstanceOf<ArgumentNullException>());
}
public void GetHashCode_WithEqualSubjectsAndIndexesAndStateKey_ReturnsSameValue([Values(0, 1, 2)] int index)
{
var subjectA = new Cursor("OK", index);
var subjectB = subjectA.Advance(0);
Assert.That(subjectB.GetHashCode(), Is.EqualTo(subjectA.GetHashCode()));
}
public void OpEquality_WithEqualSubjectAndIndex_ReturnsTrue()
{
var subjectA = new Cursor("OK");
var subjectB = subjectA.Advance(0);
Assert.That(subjectA == subjectB, Is.True);
}
public void OpInequality_WithEqualSubjectAndIndex_ReturnsFalse()
{
var subjectA = new Cursor("OK");
var subjectB = subjectA.Advance(0);
Assert.That(subjectA != subjectB, Is.False);
}
public void Constructor_WhenGivenANullFlagsCollection_DoesNotThrow()
{
var start = new Cursor("OK");
var end = start.Advance(2);
Assert.That(() => new Rule(new Identifier("OK", start, end), new WildcardExpression(), null), Throws.Nothing);
}
public void GetHashCode_WithEqualSubjectsAndIndexesAndStateKey_ReturnsSameValue([Values(0, 1, 2)] int index)
{
var subjectA = new Cursor("OK", index);
var subjectB = subjectA.Advance(0);
Assert.That(subjectB.GetHashCode(), Is.EqualTo(subjectA.GetHashCode()));
}
public void Constructor_WhenGivenANullCollectionOfRules_ThrowsException()
{
var start = new Cursor("OK");
var end = start.Advance(2);
Assert.That(() => new Grammar(null, new Dictionary <Identifier, object>(), end), Throws.InstanceOf <ArgumentNullException>());
}
public void Constructor_WhenGivenANullExpression_ThrowsException()
{
var start = new Cursor("OK");
var end = start.Advance(2);
Assert.That(() => new Identifier(null, start, end), Throws.InstanceOf<ArgumentNullException>());
}
public void Constructor_WhenGivenANullFlagsCollection_DoesNotThrow()
{
var start = new Cursor("OK");
var end = start.Advance(2);
Assert.That(() => new Rule(new Identifier("OK", start, end), new WildcardExpression(), null), Throws.Nothing);
}
public void Constructor_WhenGivenNullStartCursor_ThrowsException()
{
var start = new Cursor("OK");
var end = start.Advance(2);
Assert.That(() => new CodeSpan("OK", null, end), Throws.InstanceOf <ArgumentNullException>());
}
public void Constructor_WhenGivenNullStartCursor_ThrowsException()
{
var start = new Cursor("OK");
var end = start.Advance(2);
Assert.That(() => new CodeSpan("OK", null, end), Throws.InstanceOf<ArgumentNullException>());
}
public void Constructor_WhenGivenANullValue_ThrowsException(bool ignoreCase, bool fromResource)
{
var start = new Cursor("OK");
var end = start.Advance(2);
Assert.That(() => new LiteralExpression(start, end, null, ignoreCase, fromResource), Throws.InstanceOf <ArgumentNullException>());
}
public void Constructor_WhenGivenANullSettingsCollection_DoesNotThrow()
{
var start = new Cursor("OK");
var end = start.Advance(2);
Assert.That(() => new Grammar(new Rule[0], null, end), Throws.Nothing);
}
private IParseResult <string> ParseClass(ref Cursor cursor, string characterRanges, bool negated = false, bool ignoreCase = false)
{
if (cursor.Location + 1 <= cursor.Subject.Length)
{
var c = cursor.Subject[cursor.Location];
bool match = false;
for (int i = 0; !match && i < characterRanges.Length; i += 2)
{
match = c >= characterRanges[i] && c <= characterRanges[i + 1];
}
if (!match && ignoreCase && (char.IsUpper(c) || char.IsLower(c)))
{
var cs = c.ToString();
for (int i = 0; !match && i < characterRanges.Length; i += 2)
{
var min = characterRanges[i];
var max = characterRanges[i + 1];
for (char o = min; !match && o <= max; o++)
{
match = (char.IsUpper(o) || char.IsLower(o)) && cs.Equals(o.ToString(), StringComparison.CurrentCultureIgnoreCase);
}
}
}
if (match ^ negated)
{
var endCursor = cursor.Advance(1);
var substr = cursor.Subject.Substring(cursor.Location, 1);
var result = this.ReturnHelper <string>(cursor, ref endCursor, state => substr);
cursor = endCursor;
return(result);
}
}
return(null);
}
public void Constructor_WhenGivenANullExpression_ThrowsException()
{
var start = new Cursor("OK");
var end = start.Advance(2);
Assert.That(() => new Rule(new Identifier("OK", start, end), null, new Identifier[0]), Throws.InstanceOf <ArgumentNullException>());
}
public void Constructor_WhenGivenANullExpression_ThrowsException()
{
var start = new Cursor("OK");
var end = start.Advance(2);
var quantifier = new Quantifier(start, end, 0);
Assert.That(() => new RepetitionExpression(null, quantifier), Throws.InstanceOf <ArgumentNullException>());
}
public void Constructor_WhenGivenANullStartCursor_ThrowsException(int min, int? max, bool nullDelimiter)
{
var start = new Cursor("OK");
var end = start.Advance(2);
var delimiter = nullDelimiter ? null : new WildcardExpression();
Assert.That(() => new Quantifier(null, end, min, max, delimiter), Throws.InstanceOf<ArgumentNullException>());
}
public void Constructor_WhenGivenANullStartCursor_ThrowsException(int min, int?max, bool nullDelimiter)
{
var start = new Cursor("OK");
var end = start.Advance(2);
var delimiter = nullDelimiter ? null : new WildcardExpression();
Assert.That(() => new Quantifier(null, end, min, max, delimiter), Throws.InstanceOf <ArgumentNullException>());
}
public void ToString_WhenConstructedWithANullValue_ReturnsTheCodeVerbatim()
{
var start = new Cursor("OK");
var end = start.Advance(2);
var codeSpan = new CodeSpan("OK", start, end);
Assert.That(codeSpan.ToString(), Is.EqualTo("OK"));
}
public void Constructor_WhenGivenANullExpression_ThrowsException()
{
var start = new Cursor("OK");
var end = start.Advance(2);
var codeSpan = new CodeSpan("OK", start, end);
Assert.That(() => new TypedExpression(codeSpan, null), Throws.InstanceOf <ArgumentNullException>());
}
public void OpEquality_WithEqualValuesAndCursors_ReturnsTrue()
{
var start = new Cursor("OK", 0);
var end = start.Advance(1);
var subjectA = new ParseResult<int>(start, end, 0);
var subjectB = new ParseResult<int>(start, end, 0);
Assert.That(subjectA == subjectB, Is.True);
}
public void Equals_WithOtherObject_ReturnsFalse()
{
var start = new Cursor("OK", 0);
var end = start.Advance(1);
var subjectA = new ParseResult<int>(start, end, 0);
var subjectB = new object();
Assert.That(subjectA.Equals(subjectB), Is.False);
}
public void OpEquality_WithNullReferenceOnRight_ReturnsFalse()
{
var start = new Cursor("OK", 0);
var end = start.Advance(1);
var subjectA = new ParseResult<int>(start, end, 0);
var subjectB = (ParseResult<int>)null;
Assert.That(subjectA == subjectB, Is.False);
}
public void OpEquality_WithUnequalValues_ReturnsFalse()
{
var start = new Cursor("OK");
var end = start.Advance(1);
var subjectA = new ParseResult <int>(start, end, 1);
var subjectB = new ParseResult <int>(end, end, 0);
Assert.That(subjectA == subjectB, Is.False);
}
public void OpEquality_WithEqualValuesAndCursors_ReturnsTrue()
{
var start = new Cursor("OK");
var end = start.Advance(1);
var subjectA = new ParseResult <int>(start, end, 0);
var subjectB = new ParseResult <int>(start, end, 0);
Assert.That(subjectA == subjectB, Is.True);
}
public void OpInequality_WithNullReferenceOnLeft_ReturnsTrue()
{
var start = new Cursor("OK");
var end = start.Advance(1);
var subjectA = (ParseResult <int>)null;
var subjectB = new ParseResult <int>(start, end, 0);
Assert.That(subjectA != subjectB, Is.True);
}
public void GetHashCode_WithEqualValuesAndCursors_ReturnsSameValue([Values(0, 1, 2)] int index)
{
var start = new Cursor("OK");
var end = start.Advance(index);
var subjectA = new ParseResult <int>(start, end, 0);
var subjectB = new ParseResult <int>(start, end, 0);
Assert.That(subjectB.GetHashCode(), Is.EqualTo(subjectA.GetHashCode()));
}
public void OpEquality_WithNullReferenceOnRight_ReturnsFalse()
{
var start = new Cursor("OK");
var end = start.Advance(1);
var subjectA = new ParseResult <int>(start, end, 0);
var subjectB = (ParseResult <int>)null;
Assert.That(subjectA == subjectB, Is.False);
}
public void Equals_WithOtherObject_ReturnsFalse()
{
var start = new Cursor("OK");
var end = start.Advance(1);
var subjectA = new ParseResult <int>(start, end, 0);
var subjectB = new object();
Assert.That(subjectA.Equals(subjectB), Is.False);
}
public void GetHashCode_WithEqualValuesAndCursors_ReturnsSameValue([Values(0, 1, 2)] int index)
{
var start = new Cursor("OK");
var end = start.Advance(index);
var subjectA = new ParseResult<int>(start, end, 0);
var subjectB = new ParseResult<int>(start, end, 0);
Assert.That(subjectB.GetHashCode(), Is.EqualTo(subjectA.GetHashCode()));
}
public void OpInequality_WithUnequalEndCursors_ReturnsTrue()
{
var start = new Cursor("OK");
var one = start.Advance(1);
var two = one.Advance(1);
var subjectA = new ParseResult <int>(start, one, 0);
var subjectB = new ParseResult <int>(start, two, 0);
Assert.That(subjectA != subjectB, Is.True);
}
public void OpEquality_WithUnequalStartCursors_ReturnsFalse()
{
var start = new Cursor("OK", 0);
var one = start.Advance(1);
var two = one.Advance(1);
var subjectA = new ParseResult<int>(start, two, 0);
var subjectB = new ParseResult<int>(one, two, 0);
Assert.That(subjectA == subjectB, Is.False);
}
public void OpEquality_WithUnequalStartCursors_ReturnsFalse()
{
var start = new Cursor("OK");
var one = start.Advance(1);
var two = one.Advance(1);
var subjectA = new ParseResult <int>(start, two, 0);
var subjectB = new ParseResult <int>(one, two, 0);
Assert.That(subjectA == subjectB, Is.False);
}
public void AdvanceShouldReturnOnEof()
{
var c = new Cursor("Lorem ipsum");
for (var i = 0; i < c.Buffer.Length - 1; i++)
{
c.Advance();
Assert.False(c.Eof);
}
Assert.Equal('m', c.Current);
c.Advance();
Assert.True(c.Eof);
Assert.Equal(Cursor.NullChar, c.Current);
c.Advance();
Assert.True(c.Eof);
Assert.Equal(Cursor.NullChar, c.Current);
}
public void Advance_IncrementsTheOffset()
{
var subject = "OK_OK_OK_OK_OK";
var cursor = new Cursor(subject);
for (int i = 1; i <= subject.Length; i++)
{
cursor.Advance(1);
Assert.That(cursor.Offset, Is.EqualTo(i));
}
}
public void Advance_WhenOnASingleLine_IncrementsTheColumnNumber()
{
var subject = "OK_OK_OK_OK_OK";
var cursor = new Cursor(subject);
for (int i = 1; i <= subject.Length; i++)
{
cursor.Advance(1);
Assert.That(cursor.Column, Is.EqualTo(i + 1));
}
}
private IParseResult <string> ParseAny(ref Cursor cursor)
{
if (cursor.Location + 1 <= cursor.Subject.Length)
{
var substr = cursor.Subject.Substring(cursor.Location, 1);
var endCursor = cursor.Advance(1);
var result = this.ReturnHelper <string>(cursor, ref endCursor, state => substr);
cursor = endCursor;
return(result);
}
return(null);
}
private IParseResult <string> ParseLiteral(ref Cursor cursor, string literal, bool ignoreCase = false)
{
if (cursor.Location + literal.Length <= cursor.Subject.Length)
{
var substr = cursor.Subject.Substring(cursor.Location, literal.Length);
if (ignoreCase ? substr.Equals(literal, StringComparison.OrdinalIgnoreCase) : substr == literal)
{
var endCursor = cursor.Advance(substr.Length);
var result = this.ReturnHelper <string>(cursor, ref endCursor, state => substr);
cursor = endCursor;
return(result);
}
}
return(null);
}
public override void HandleMessage(object message)
{
if (message is KeyPressedMessage msg)
{
char c = msg.Key.KeyChar;
if (c == BackspaceChar)
{
cursor.Retract();
}
var drawMsg = new DrawMessage((cursor.Pos.X, cursor.Pos.Y), new DrawInfo(c));
MessageBus.PostMessage(drawMsg);
//matrix[cursor.Pos.X, cursor.Pos.Y] = c;
if (c != BackspaceChar)
{
cursor.Advance();
}
}
}
public void OpInequality_WithUnequalEndCursors_ReturnsTrue()
{
var start = new Cursor("OK", 0);
var one = start.Advance(1);
var two = one.Advance(1);
var subjectA = new ParseResult<int>(start, one, 0);
var subjectB = new ParseResult<int>(start, two, 0);
Assert.That(subjectA != subjectB, Is.True);
}
public void Advance_WhenTheCursorIsMutable_ThrowsException()
{
var cursor = new Cursor("OK", 0).WithMutability(mutable: true);
Assert.That(() => cursor.Advance(0), Throws.InstanceOf<InvalidOperationException>());
}
public void OpInequality_WithEqualSubjectAndIndex_ReturnsFalse()
{
var subjectA = new Cursor("OK");
var subjectB = subjectA.Advance(0);
Assert.That(subjectA != subjectB, Is.False);
}
public void OpInequality_WithNullReferenceOnLeft_ReturnsTrue()
{
var start = new Cursor("OK", 0);
var end = start.Advance(1);
var subjectA = (ParseResult<int>)null;
var subjectB = new ParseResult<int>(start, end, 0);
Assert.That(subjectA != subjectB, Is.True);
}
public void OpEquality_WithEqualSubjectAndIndex_ReturnsTrue()
{
var subjectA = new Cursor("OK");
var subjectB = subjectA.Advance(0);
Assert.That(subjectA == subjectB, Is.True);
}
public void Advance_WhenPassingALineTerminator_ResetsTheColumnNumberToOne(string lineTerminator)
{
var subject = "OK" + lineTerminator + "OK";
var cursor = new Cursor(subject);
cursor.Advance("OK".Length + lineTerminator.Length);
Assert.That(cursor.Column, Is.EqualTo(1));
}
public void Advance_WhenTheCursorIsMutable_ThrowsException()
{
var cursor = new Cursor("OK", 0).WithMutability(mutable: true);
Assert.That(() => cursor.Advance(0), Throws.InstanceOf <InvalidOperationException>());
}
public void Advance_WhenPassingLFWhichIsFollowedByCRLF_IncrementsTheColumnNumber()
{
var subject = "OK\n\r\n";
var cursor = new Cursor(subject);
cursor.Advance("OK".Length + 1);
Assert.That(cursor.Line, Is.EqualTo(2));
}
public void OpEquality_WithUnequalValues_ReturnsFalse()
{
var start = new Cursor("OK", 0);
var end = start.Advance(1);
var subjectA = new ParseResult<int>(start, end, 1);
var subjectB = new ParseResult<int>(end, end, 0);
Assert.That(subjectA == subjectB, Is.False);
}
public void AdvanceShouldCountLinesAndColumns()
{
var c = new Cursor("123\n456\r\n789");
Assert.Equal('1', c.Current);
Assert.Equal(0, c.Position.Offset);
Assert.Equal(1, c.Position.Column);
Assert.Equal(1, c.Position.Line);
c.Advance();
Assert.Equal('2', c.Current);
Assert.Equal(1, c.Position.Offset);
Assert.Equal(2, c.Position.Column);
Assert.Equal(1, c.Position.Line);
c.Advance();
Assert.Equal('3', c.Current);
Assert.Equal(2, c.Position.Offset);
Assert.Equal(3, c.Position.Column);
Assert.Equal(1, c.Position.Line);
c.Advance();
Assert.Equal('\n', c.Current);
Assert.Equal(3, c.Position.Offset);
Assert.Equal(4, c.Position.Column);
Assert.Equal(1, c.Position.Line);
c.Advance();
Assert.Equal('4', c.Current);
Assert.Equal(4, c.Position.Offset);
Assert.Equal(1, c.Position.Column);
Assert.Equal(2, c.Position.Line);
c.Advance();
Assert.Equal('5', c.Current);
Assert.Equal(5, c.Position.Offset);
Assert.Equal(2, c.Position.Column);
Assert.Equal(2, c.Position.Line);
c.Advance();
Assert.Equal('6', c.Current);
Assert.Equal(6, c.Position.Offset);
Assert.Equal(3, c.Position.Column);
Assert.Equal(2, c.Position.Line);
c.Advance();
Assert.Equal('\n', c.Current);
Assert.Equal(8, c.Position.Offset);
Assert.Equal(3, c.Position.Column);
Assert.Equal(2, c.Position.Line);
c.Advance();
Assert.Equal('7', c.Current);
Assert.Equal(9, c.Position.Offset);
Assert.Equal(1, c.Position.Column);
Assert.Equal(3, c.Position.Line);
c.Advance();
Assert.Equal('8', c.Current);
Assert.Equal(10, c.Position.Offset);
Assert.Equal(2, c.Position.Column);
Assert.Equal(3, c.Position.Line);
c.Advance();
Assert.Equal('9', c.Current);
Assert.Equal(11, c.Position.Offset);
Assert.Equal(3, c.Position.Column);
Assert.Equal(3, c.Position.Line);
c.Advance();
Assert.Equal(Cursor.NullChar, c.Current);
Assert.Equal(12, c.Position.Offset);
Assert.Equal(4, c.Position.Column);
Assert.Equal(3, c.Position.Line);
}
public void Advance_WhenPassingTheTheFirstCharacterOfCRLF_DoesNotIncrementTheLineNumber()
{
var subject = "OK\r\n";
var cursor = new Cursor(subject);
cursor.Advance("OK".Length + 1);
Assert.That(cursor.Line, Is.EqualTo(1));
}
public void Advance_WhenPassingALineTerminator_IncrementsTheLineNumber(string lineTerminator)
{
int count = 10;
var subject = string.Join(string.Empty, from i in Enumerable.Range(0, count) select lineTerminator); // Create a subject containing 10 copies of the line terminator.
var cursor = new Cursor(subject);
for (int i = 1; i <= count; i++)
{
cursor.Advance(lineTerminator.Length);
Assert.That(cursor.Line, Is.EqualTo(i + 1));
}
}