public Calculator(IPostfixBuilder postfixBuilder,
IPostfixCalculator postfixCalculator, IEquationParser equationParser)
{
_postfixBuilder = postfixBuilder;
_postfixCalculator = postfixCalculator;
_equationParser = equationParser;
}
public void EvaluateExpression_Should_ThrowArgumentNullException_When_PassedNull()
{
this.postfixCalculator =
new PostfixCalculator(this.operationTableMock.Object, this.opeartionFacotryMock.Object);
Assert.ThrowsException <ArgumentNullException>(() => this.postfixCalculator.EvaluateExpression(null));
}
public void EvaluateExpression_Should_ThrowInvalidMathematicalExpressionException_When_PassedEmptyCollection()
{
this.postfixCalculator =
new PostfixCalculator(this.operationTableMock.Object, this.opeartionFacotryMock.Object);
Assert.ThrowsException <InvalidMathematicalExpressionException>(
() => this.postfixCalculator.EvaluateExpression(new List <string>()));
}
public void EvaluateExpression_Should_ThrowInvalidMathematicaExpressionException_When_Passed_StringEnumerableWhitInvalidElement()
{
const string token = "Pesho";
var args = new List <string> {
token
};
this.operationTableMock.Setup(x => x.Contains(token)).Returns(false);
this.postfixCalculator = new PostfixCalculator(this.operationTableMock.Object, this.opeartionFacotryMock.Object);
Assert.ThrowsException <InvalidMathematicalExpressionException>(() => this.postfixCalculator
.EvaluateExpression(args));
}
public void EvaluateExpression_Should_ThrowInvalidOperationException_When_OperationCannotBeExecuted()
{
const string operation = "+";
var args = new List <string> {
operation
};
var operationStub = new Mock <IOperation>();
this.operationTableMock.Setup(x => x.Contains(operation)).Returns(true);
this.opeartionFacotryMock.Setup(x => x.CreateOperation(operation)).Returns(operationStub.Object);
this.postfixCalculator = new PostfixCalculator(this.operationTableMock.Object, this.opeartionFacotryMock.Object);
Assert.ThrowsException <InvalidOperationException>(() => this.postfixCalculator
.EvaluateExpression(args));
}
public void EvaluateExpression_Should_InvokeCreateOperation_When_Passed_StringEnumerableContainigOperation()
{
const string operation = "+";
this.operationTableMock.Setup(x => x.Contains(operation)).Returns(true);
this.opeartionFacotryMock.Setup(x => x.CreateOperation(operation)).Throws <NotImplementedException>();
this.postfixCalculator =
new PostfixCalculator(this.operationTableMock.Object, this.opeartionFacotryMock.Object);
try
{
this.postfixCalculator.EvaluateExpression(new List <string> {
"2", "2", operation
});
}
catch (NotImplementedException) { }
this.opeartionFacotryMock.Verify(x => x.CreateOperation(operation), Times.Once);
}
public Expression(IExpressionParser parser, IInfixToPostfixConverter postfixConverter, IPostfixCalculator postfixCalculator)
{
this.parser = parser;
this.postfixConverter = postfixConverter;
this.postfixCalculator = postfixCalculator;
}
