public void WhenWrongFunctionExpressionIsPassed_Then_ExceptionShouldBeThrown(string expression)
{
var sut = new FunctionOrConstTermParser();
Assert.Throws <InvalidOperationException>(() =>
{
var result = sut.Parse(expression, 0);
});
}
public void WhenExpressionConsistOnlyFromLetters_Then_ConstTermShouldBeReturned()
{
var sut = new FunctionOrConstTermParser();
var result = sut.Parse("pi", 0);
Assert.True(result.TermType == TermType.Const);
Assert.True(result.Term == "pi");
}
public void WhenExpressionConsistFromLettersAndParenthesis_Then_FunctionTermShouldBeReturned(
string expression, string expectedFunction, string expectedParameters, int numberOfParams)
{
var sut = new FunctionOrConstTermParser();
var result = sut.Parse(expression, 0) as ComplexMathParserResult;
Assert.True(result.TermType == TermType.Function);
Assert.True(result.Term == expectedFunction);
Assert.True(result.InternalTerm != null);
Assert.True(result.InternalTerm.Term == expectedParameters);
Assert.True(result.InternalTerm.TermType == TermType.Expression);
Assert.True(result.NumberOfParams == numberOfParams);
}