/// <summary>
/// Manually create math question
/// </summary>
/// <param name="op">Operator to use</param>
public MathQuestion(MathInterpreter interpreter)
{
if (Rand == null)
{
Rand = new Random(Environment.TickCount);
}
Interpreter = interpreter;
}
/// <summary>
/// Randomly generates a question
/// </summary>
public MathQuestion(DifficultyLevel level)
{
if (Rand == null)
{
Rand = new Random(Environment.TickCount);
}
Interpreter = MakeRandomInterpreter(level);
}
public void GetAnswer_ReturnsCorrectAnswer_WhenProvidedThreePartAdditionExpression()
{
const string testExpression = "4012 + 550992 + 6672";
const decimal expectedAnswer = 561676;
var sut = new MathInterpreter();
var result = sut.GetAnswer(testExpression);
Assert.Equal(expectedAnswer, result);
}
public void GetAnswer_ReturnsCorrectAnswer_WhenProvidedExpression8()
{
const string testExpression = "4 + 5 - 2 * (6 + 4)";
const decimal expectedAnswer = -11;
var sut = new MathInterpreter();
var result = sut.GetAnswer(testExpression);
Assert.Equal(expectedAnswer, result);
}
public void GetAnswer_ReturnsCorrectAnswer_WhenProvidedExpression4()
{
const string testExpression = "-6 - (-4 * 5) * -1";
const decimal expectedAnswer = -26;
var sut = new MathInterpreter();
var result = sut.GetAnswer(testExpression);
Assert.Equal(expectedAnswer, result);
}
public void GetAnswer_ReturnsCorrectAnswer_WhenProvidedTripleNegativeMultWithParen()
{
const string testExpression = "-6 - (-4 * 5)";
const decimal expectedAnswer = 14;
var sut = new MathInterpreter();
var result = sut.GetAnswer(testExpression);
Assert.Equal(expectedAnswer, result);
}
public void GetAnswer_ReturnsCorrectAnswer_WhenProvidedNegativeMult()
{
const string testExpression = "6 - 4 * 5";
const decimal expectedAnswer = -14;
var sut = new MathInterpreter();
var result = sut.GetAnswer(testExpression);
Assert.Equal(expectedAnswer, result);
}
public void GetAnswer_ReturnsCorrectAnswer_WhenProvidedThreePartSubtractionExpression()
{
const string testExpression = "8854201 - 33445 - 54";
const decimal expectedAnswer = 8820702;
var sut = new MathInterpreter();
var result = sut.GetAnswer(testExpression);
Assert.Equal(expectedAnswer, result);
}
public void GetAnswer_ReturnsCorrectAnswer_WhenProvidedDivisionWithDecimalResult()
{
const string testExpression = "10 / 4";
const decimal expectedAnswer = 2.5M;
var sut = new MathInterpreter();
var result = sut.GetAnswer(testExpression);
Assert.Equal(expectedAnswer, result);
}
public void GetAnswer_ReturnsCorrectAnswer_WhenProvidedMultiplicationWithAdditionFour()
{
const string testExpression = "3 + 5 * 6 + 3 * 10 + 5 + 5 * 1 + 8.5 - 2";
const decimal expectedAnswer = 79.5M;
var sut = new MathInterpreter();
var result = sut.GetAnswer(testExpression);
Assert.Equal(expectedAnswer, result);
}
public void GetAnswer_ReturnsCorrectAnswer_WhenProvidedComplexExpressionWithDecimal()
{
const string testExpression = "4012.43 + 550992.111 - .02 + 324 - 9999999 - 10.00 - 4323 + .009 + 39393";
const decimal expectedAnswer = -9409610.47M;
var sut = new MathInterpreter();
var result = sut.GetAnswer(testExpression);
Assert.Equal(expectedAnswer, result);
}
public void GetAnswer_ReturnsCorrectAnswer_WhenProvidedExpressionWithDecimal()
{
const string testExpression = "4012.43 + 550992.111";
const decimal expectedAnswer = 555004.541M;
var sut = new MathInterpreter();
var result = sut.GetAnswer(testExpression);
Assert.Equal(expectedAnswer, result);
}
public void GetAnswer_ReturnsCorrectAnswer_WhenProvidedComplexAdditionAndSubstrationExpression()
{
const string testExpression = "8854201 + 4435 - 690 - 77744655 + 1 + 1+234 + 656432 - 90 - 90-99+1 +590333";
const decimal expectedAnswer = -67639986;
var sut = new MathInterpreter();
var result = sut.GetAnswer(testExpression);
Assert.Equal(expectedAnswer, result);
}
public void GetAnswer_ReturnsCorrectAnswer_WhenProvidedExpressionWithAdditionAndSubtractionExpression()
{
const string testExpression = "8854201 + 4435 - 690";
const decimal expectedAnswer = 8857946;
var sut = new MathInterpreter();
var result = sut.GetAnswer(testExpression);
Assert.Equal(expectedAnswer, result);
}
public void GetAnswer_ReturnsCorrectAnswer_WhenProvidedNestedParenthetical3()
{
const string testExpression = "5 * (-1 * ((6 + 2) - (10 * (5 - 3))))";
const decimal expectedAnswer = 60;
var sut = new MathInterpreter();
var result = sut.GetAnswer(testExpression);
Assert.Equal(expectedAnswer, result);
}
public void GetAnswer_ReturnsCorrectAnswer_WhenProvidedSimpleAdditionExpression()
{
const string testExpression = "4 + 5";
const decimal expectedAnswer = 9;
var sut = new MathInterpreter();
var result = sut.GetAnswer(testExpression);
Assert.Equal(expectedAnswer, result);
}
public void GetAnswer_ReturnsCorrectAnswer_WhenProvidedDivisionAndMultiplication()
{
const string testExpression = "10 / 2 * 5";
const decimal expectedAnswer = 25;
var sut = new MathInterpreter();
var result = sut.GetAnswer(testExpression);
Assert.Equal(expectedAnswer, result);
}
public void GetAnswer_ReturnsCorrectAnswer_WhenProvidedNegativeResultSubtractionExpression()
{
const string testExpression = "33445 - 8854201";
const decimal expectedAnswer = -8820756;
var sut = new MathInterpreter();
var result = sut.GetAnswer(testExpression);
Assert.Equal(expectedAnswer, result);
}
public void GetAnswer_ReturnsCorrectAnswer_WhenProvidedMultiplicationWithAdditionAndParen()
{
const string testExpression = "(3 + 5) * 6";
const decimal expectedAnswer = 48;
var sut = new MathInterpreter();
var result = sut.GetAnswer(testExpression);
Assert.Equal(expectedAnswer, result);
}
