static void Main(string[] args)
{
var ep = new ExpressionProcessor();
ep.Variables.Add('x', 3);
Console.WriteLine($"1+2+3={ep.Calculate("1+2+3")}");
Console.WriteLine($"1+2+xy={ep.Calculate("1+2+xy")}");
Console.WriteLine($"10-2-x={ep.Calculate("10-2-x")}");
}
public void TestOneValue()
{
ep.Variables.Add('y', 7);
var result = ep.Calculate("y");
Assert.That(result, Is.EqualTo(7));
result = ep.Calculate("8");
Assert.That(result, Is.EqualTo(8));
}
public void Test()
{
var ep = new ExpressionProcessor();
ep.Variables.Add('x', 5);
Assert.That(ep.Calculate("1"), Is.EqualTo(1));
Assert.That(ep.Calculate("1+2"), Is.EqualTo(3));
Assert.That(ep.Calculate("1+x"), Is.EqualTo(6));
Assert.That(ep.Calculate("1+xy"), Is.EqualTo(0));
}
public void Run()
{
//this.SimpleInterpreter();
var processor = new ExpressionProcessor();
processor.Variables.Add('x', 123);
Console.WriteLine($"{"1+2+x"} {processor.Calculate("1+2+x")}");
Console.WriteLine($"{"1+2+xx"} {processor.Calculate("1+2+xx")}");
Console.WriteLine($"{"1+2+3+4"} {processor.Calculate("1+2+3+4")}");
Console.WriteLine($"{"1"} {processor.Calculate("1")}");
}
public void Calculate_ValidInputOfNumbers_CheckResult()
{
var ep = new ExpressionProcessor();
var result = ep.Calculate("1+2+3");
Assert.That(result, Is.EqualTo(6));
}
public void Calculate_InvalidInputOfNumbersAndVariables_CheckResult()
{
var ep = new ExpressionProcessor();
ep.Variables['x'] = 10;
var result = ep.Calculate("1+3+xy");
Assert.That(result, Is.EqualTo(0));
}
public void Calculate_1_plus_2_plus_xy_should_be_0_cause_xy_not_legal()
{
// Arrange
var target = new ExpressionProcessor();
// Act
var result = target.Calculate("1+2+xy");
// Assert
result.Should().Be(0);
}
public void Calculate_123_plus_456_plus_789_should_be_1368()
{
// Arrange
var target = new ExpressionProcessor();
// Act
var result = target.Calculate("123+456+789");
// Assert
result.Should().Be(1368);
}
public void Calculate_1_plus_2_plus_3_should_be_6()
{
// Arrange
var target = new ExpressionProcessor();
// Act
var result = target.Calculate("1+2+3");
// Assert
result.Should().Be(6);
}
public void Calculate_10_minus_2_minus_x_variable_should_be_0_when_x_not_exist_in_variables()
{
// Arrange
var target = new ExpressionProcessor();
// Act
var result = target.Calculate("10-2-x");
// Assert
result.Should().Be(0);
}
public void Calculate_10_minus_2_minus_x_variable_should_be_5_when_x_equals_to_3()
{
// Arrange
var target = new ExpressionProcessor();
target.Variables.Add('x', 3);
// Act
var result = target.Calculate("10-2-x");
// Assert
result.Should().Be(5);
}