public void ValidateWithSeveralOperatorsTogether()
{
string expression = "+ + 7";
bool result = MathRegex.IsExpressionValid(expression);
Assert.IsFalse(result);
}
public void ValidateSimpleWrongExpression()
{
string expression = "2a7";
bool result = MathRegex.IsExpressionValid(expression);
Assert.IsFalse(result);
}
public void ValidateWrongExpressionWithValidSubexpression()
{
string expression = "2 + 7 - 2 a 3 b";
bool result = MathRegex.IsExpressionValid(expression);
Assert.IsFalse(result);
}
public void ValidateComplexExpression()
{
string expression = "2 + 7 - 2 * 4";
bool result = MathRegex.IsExpressionValid(expression);
Assert.IsTrue(result);
}
public void ValidateComplexWrongExpression()
{
string expression = "2 + 7 a 2 b 4";
bool result = MathRegex.IsExpressionValid(expression);
Assert.IsFalse(result);
}
public void ValidateFailsNoSpaces()
{
string expression = "2+7";
bool result = MathRegex.IsExpressionValid(expression);
Assert.IsFalse(result);
}
public void ValidateWithSpaces()
{
string expression = "2 + 287";
bool result = MathRegex.IsExpressionValid(expression);
Assert.IsTrue(result);
}
public void ValidateMoreThanOneDigitExpression()
{
string expression = "25 + 287";
bool result = MathRegex.IsExpressionValid(expression);
Assert.IsTrue(result);
}
public void ValidateSimpleExpressionWithAllOperations()
{
string operators = "+-*/";
string expression = String.Empty;
foreach (char operatorChar in operators)
{
expression = "2 " + operatorChar + " 2";
Assert.IsTrue(MathRegex.IsExpressionValid(expression), "Failure with operator: " + operatorChar);
}
}
public void ValidateWithNegativeNumbers()
{
Assert.IsTrue(MathRegex.IsExpressionValid("-7 + 1"));
}
public void ValidateWithNegativeNumbersAtTheEnd()
{
Assert.IsTrue(MathRegex.IsExpressionValid("7 - -1"));
}