CSCI1010TDDExample.vb

'Copyright 2017 , Lucien Brule & RPI CSCI1010
'Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
'The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
'THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Public Class frmTestCaseExample
    Private Sub btnIsEven_Click(sender As Object, e As EventArgs) Handles btnIsEven.Click
        If (isEven(nudNumber.Value)) Then
            lblOutMessage.Text = "Yep, " + Convert.ToString(nudNumber.Value) + " is even"
        Else
            lblOutMessage.Text = "Nope, " + Convert.ToString(nudNumber.Value) + " isn't even"
        End If

    End Sub
    'Step 0: Write a function header and determine what it should do
    'protip: It should do the minimal work required to still provide value
    ' (ie this function only takes integers and determines if they are even on a true false 
    ' -- basis, nothing else)

    Private Function isEven(number As Integer)
        'Step 1: Do the minimal amount to make the tests pass
        ' Return True
        'Step 2: (write a test in range of possible function outputs that makes the tests fail)
        'Step 3: ammend your code so that the  passes
        If ((number Mod 2) = 0) Then
            Return True
        Else
            Return False
        End If
    End Function

    Private Function runTests()
        'Say that tests are running
        Console.WriteLine("Running tests...")

        'Test is Even given 0 should return True
        If (isEven(1)) Then
            Console.WriteLine("Should say that 0 is even")
            Return False
        End If

        'Test is Even given 1 should return False
        If (isEven(1)) Then
            Console.WriteLine("Should say that 1 Is Not even (return False)")
            Return False
        End If

        'Test is Even given 2 should return True
        If (Not isEven(2)) Then
            Console.WriteLine("Should say that 2 is even (return True)")
            Return False
        End If

        'If we got down past all of the tests, then all of them passed, ergo return True.
        Console.WriteLine("All Tests passed")
        Return True
    End Function

    Private Sub frmTestCaseExample_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        'Since we don't have an external module, let's run the tests at startup
        runTests()
    End Sub
End Class