public void EnsureICanExtractOperator()
{
// Arrange
Parse aParse = new Parse();
string anOperator = "*";
// Act
aParse.ParseInput("5 * 2");
// Assert
Assert.AreEqual(anOperator, aParse.Operator);
}
public void EnsureICanExtractInputTerms()
{
// Arrange
Parse aParse = new Parse();
string firstTerm = "1";
string secondTerm = "8";
// Act
aParse.ParseInput("1 + 8");
// Assert
Assert.AreEqual(firstTerm, aParse.Terms[0]);
Assert.AreEqual(secondTerm, aParse.Terms[1]);
}
public void EnsureICanParseInputWithSecondTermNegative()
{
// Arrange
Parse aParse = new Parse();
string anInput = "1 + -1";
int firstTermExpected = 1;
int secondTermExpected = -1;
string operatorExpected = "+";
int firstTermActual;
int secondTermActual;
// Act
aParse.ParseInput(anInput);
int.TryParse(aParse.Terms[0], out firstTermActual);
int.TryParse(aParse.Terms[1], out secondTermActual);
// Assert
Assert.AreEqual(firstTermExpected, firstTermActual);
Assert.AreEqual(secondTermExpected, secondTermActual);
Assert.AreEqual(operatorExpected, aParse.Operator);
}
public void EnsureICanRemoveInappropriateWhiteSpace()
{
Parse aParse = new Parse();
aParse.ParseInput("8 2 +23210 7 ");
string expected = "82 + 232107";
Assert.AreEqual(expected, aParse.Expression);
}
public void EnsureInvalidInputThrowsAnError()
{
// Arrange
Parse aParse = new Parse();
string anInput = "1 + - 1";
aParse.ParseInput(anInput);
}