Imports System Imports Xunit Public Class WordyTests Public Sub Just_a_number() Assert.Equal(5, Answer("What is 5?")) End Sub Public Sub Addition() Assert.Equal(2, Answer("What is 1 plus 1?")) End Sub Public Sub More_addition() Assert.Equal(55, Answer("What is 53 plus 2?")) End Sub Public Sub Addition_with_negative_numbers() Assert.Equal(-11, Answer("What is -1 plus -10?")) End Sub Public Sub Large_addition() Assert.Equal(45801, Answer("What is 123 plus 45678?")) End Sub Public Sub Subtraction() Assert.Equal(16, Answer("What is 4 minus -12?")) End Sub Public Sub Multiplication() Assert.Equal(-75, Answer("What is -3 multiplied by 25?")) End Sub Public Sub Division() Assert.Equal(-11, Answer("What is 33 divided by -3?")) End Sub Public Sub Multiple_additions() Assert.Equal(3, Answer("What is 1 plus 1 plus 1?")) End Sub Public Sub Addition_and_subtraction() Assert.Equal(8, Answer("What is 1 plus 5 minus -2?")) End Sub Public Sub Multiple_subtraction() Assert.Equal(3, Answer("What is 20 minus 4 minus 13?")) End Sub Public Sub Subtraction_then_addition() Assert.Equal(14, Answer("What is 17 minus 6 plus 3?")) End Sub Public Sub Multiple_multiplication() Assert.Equal(-12, Answer("What is 2 multiplied by -2 multiplied by 3?")) End Sub Public Sub Addition_and_multiplication() Assert.Equal(-8, Answer("What is -3 plus 7 multiplied by -2?")) End Sub Public Sub Multiple_division() Assert.Equal(2, Answer("What is -12 divided by 2 divided by -3?")) End Sub Public Sub Unknown_operation() Assert.Throws(Of ArgumentException)(Function() Answer("What is 52 cubed?")) End Sub Public Sub Non_math_question() Assert.Throws(Of ArgumentException)(Function() Answer("Who is the President of the United States?")) End Sub Public Sub Reject_problem_missing_an_operand() Assert.Throws(Of ArgumentException)(Function() Answer("What is 1 plus?")) End Sub Public Sub Reject_problem_with_no_operands_or_operators() Assert.Throws(Of ArgumentException)(Function() Answer("What is?")) End Sub Public Sub Reject_two_operations_in_a_row() Assert.Throws(Of ArgumentException)(Function() Answer("What is 1 plus plus 2?")) End Sub Public Sub Reject_two_numbers_in_a_row() Assert.Throws(Of ArgumentException)(Function() Answer("What is 1 plus 2 1?")) End Sub Public Sub Reject_postfix_notation() Assert.Throws(Of ArgumentException)(Function() Answer("What is 1 2 plus?")) End Sub Public Sub Reject_prefix_notation() Assert.Throws(Of ArgumentException)(Function() Answer("What is plus 1 2?")) End Sub End Class