public void ParsingSteps(
Syntan.SyntacticAnalysis.ExtendedGrammar grammar,
Syntan.SyntacticAnalysis.LR.ParserTable table,
IEnumerable<Syntan.SyntacticAnalysis.TerminalSymbol> input,
IEnumerable<Fixtures.ParsingStepData> expected_parsing_steps)
{
var p = new Parser();
p.Start(grammar, table, input);
foreach( var step in expected_parsing_steps )
{
Assert.Equal(step.Phase, p.Phase);
Assert.Equal(step.IsParsing, p.IsParsing);
Assert.Equal(step.IsFinished, p.IsFinished);
Assert.Equal(step.StepCount, p.StepCount);
Assert.Equal(step.CurrentState, p.CurrentState);
Assert.Equal(step.CurrentInputSymbol, p.CurrentInputSymbol);
Assert.Equal(step.ActionArgument, p.ActionArgument);
if( step.AreReductionPropertiesSet )
{
Assert.Equal(step.GotoState, p.GotoState);
Assert.Equal(step.GotoSymbol, p.GotoSymbol);
Assert.Equal(step.ReductionRule, p.ReductionRule);
}
p.StepPhase();
}
}
public void StartWhenParsing()
{
var p = new Parser();
p.Start(
Fixtures.EmptyGrammar.ExtendedGrammar,
Fixtures.EmptyGrammar.SLR1ParserTable,
new Syntan.SyntacticAnalysis.TerminalSymbol[] { Fixtures.EmptyGrammar.ExtendedGrammar.EndOfSourceSymbol });
Assert.Throws<InvalidOperationException>(
() => p.Start(
Fixtures.EmptyGrammar.ExtendedGrammar,
Fixtures.EmptyGrammar.SLR1ParserTable,
new Syntan.SyntacticAnalysis.TerminalSymbol[] { Fixtures.EmptyGrammar.ExtendedGrammar.EndOfSourceSymbol })
);
}
public void StartWithEmptyInput()
{
var p = new Parser();
Assert.Throws<UnexpectedEndOfSourceException>(
() => p.Start(
Fixtures.EmptyGrammar.ExtendedGrammar,
Fixtures.EmptyGrammar.SLR1ParserTable,
new Syntan.SyntacticAnalysis.TerminalSymbol[0])
);
}
public void StopAfterAccept()
{
var p = new Parser();
p.Start(
Fixtures.EmptyGrammar.ExtendedGrammar,
Fixtures.EmptyGrammar.SLR1ParserTable,
new Syntan.SyntacticAnalysis.TerminalSymbol[] { Fixtures.EmptyGrammar.ExtendedGrammar.EndOfSourceSymbol });
p.Stop();
Assert.Equal(ParsingPhase.NotParsing, p.Phase);
Assert.True(!p.IsParsing);
}
public void StopAfterError()
{
var p = new Parser();
p.Start(
Fixtures.Grammar2.ExtendedGrammar,
Fixtures.Grammar2.SLR1ParserTable,
new TerminalSymbol[] { Fixtures.Grammar2.ExtendedGrammar.EndOfSourceSymbol });
p.Stop();
Assert.Equal(ParsingPhase.NotParsing, p.Phase);
Assert.True(!p.IsParsing);
}
public void StepAfterError()
{
var p = new Parser();
p.Start(
Fixtures.Grammar2.ExtendedGrammar,
Fixtures.Grammar2.SLR1ParserTable,
new TerminalSymbol[] { Fixtures.Grammar2.ExtendedGrammar.EndOfSourceSymbol });
Assert.Throws<InvalidOperationException>(
() => p.StepPhase()
);
}
public void StartWithValidEmptyGrammar()
{
var p = new Parser();
p.Start(
Fixtures.EmptyGrammar.ExtendedGrammar,
Fixtures.EmptyGrammar.SLR1ParserTable,
new Syntan.SyntacticAnalysis.TerminalSymbol[] { Fixtures.EmptyGrammar.ExtendedGrammar.EndOfSourceSymbol });
Assert.Equal(ParsingPhase.Accept, p.Phase);
}
public void StartWithNullParserTable()
{
var p = new Parser();
var ex = Assert.Throws<ArgumentNullException>(
() => p.Start(
Fixtures.EmptyGrammar.ExtendedGrammar,
null,
new Syntan.SyntacticAnalysis.TerminalSymbol[0])
);
Assert.Equal("table", ex.ParamName);
}
public void StartWithNullInput()
{
var p = new Parser();
var ex = Assert.Throws<ArgumentNullException>(
() => p.Start(
Fixtures.EmptyGrammar.ExtendedGrammar,
Fixtures.EmptyGrammar.SLR1ParserTable,
null)
);
Assert.Equal("input", ex.ParamName);
}
public void StartWithNullGrammar()
{
var p = new Parser();
var ex = Assert.Throws<ArgumentNullException>(
() => p.Start(
null,
Fixtures.EmptyGrammar.SLR1ParserTable,
new Syntan.SyntacticAnalysis.TerminalSymbol[0])
);
Assert.Equal("grammar", ex.ParamName);
}