public void Interpret_ThrowError_WhenCalledNullOrEmpty(string input)
{
// Arrange
var engine = new CalculateEngine();
// Act
Assert.Catch <ArgumentNullException>(() => engine.Interpret(input));
}
public void Interpret_ThrowError_WhenCalledNullOrEmpty(string input)
{
// Arrange
var engine = new CalculateEngine();
// Act
Assert.ThrowsException <ArgumentNullException>(() => engine.Interpret(input, CultureInfo.CurrentCulture, out _));
}
[TestCase("pi(2)")] // Incorrect input, constant is being treated as a function.
public void Interpret_NoResult_WhenCalled(string input)
{
// Arrange
var engine = new CalculateEngine();
// Act
var result = engine.Interpret(input);
// Assert
Assert.AreEqual(default(CalculateResult), result);
}
[TestCase("123 456", 56088D)] // BUG: Framework accepts ' ' as multiplication
public void Interpret_QuirkOutput_WhenCalled(string input, decimal expectedResult)
{
// Arrange
var engine = new CalculateEngine();
// Act
var result = engine.Interpret(input, CultureInfo.InvariantCulture);
// Assert
Assert.IsNotNull(result);
Assert.AreEqual(expectedResult, result.Result);
}
public void Interpret_NoErrors_WhenCalledWithRounding(string input, decimal expectedResult)
{
// Arrange
var engine = new CalculateEngine();
// Act
var result = engine.Interpret(input, CultureInfo.InvariantCulture);
// Assert
Assert.IsNotNull(result);
Assert.AreEqual(CalculateEngine.Round(expectedResult), result.RoundedResult);
}
public void Interpret_MustReturnResult_WhenResultIsZero(string input)
{
// Arrange
var engine = new CalculateEngine();
// Act
var result = engine.Interpret(input, CultureInfo.InvariantCulture);
// Assert
Assert.IsNotNull(result);
Assert.AreEqual(0.0, result.Result);
}
public void Interpret_DifferentCulture_WhenCalled(string input, decimal expectedResult, string cultureName)
{
// Arrange
var cultureInfo = CultureInfo.GetCultureInfo(cultureName);
var engine = new CalculateEngine();
// Act
var result = engine.Interpret(input, cultureInfo);
// Assert
Assert.IsNotNull(result);
Assert.AreEqual(CalculateEngine.Round(expectedResult), result.RoundedResult);
}
public void Interpret_MustReturnExpectedResult_WhenCalled(string input, decimal expectedResult)
{
// Arrange
var engine = new CalculateEngine();
// Act
// Using InvariantCulture since this is internal
var result = engine.Interpret(input, CultureInfo.InvariantCulture);
// Assert
Assert.IsNotNull(result);
Assert.AreEqual(expectedResult, result.Result);
}
