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Option VBASupport 1
Option Explicit
Dim passCount As Integer
Dim failCount As Integer
Dim result As String
Function doUnitTest() As String
result = verify_testIsMissing()
If failCount <> 0 Or passCount = 0 Then
doUnitTest = result
Else
doUnitTest = "OK"
End If
End Function
Function verify_testIsMissing() As String
passCount = 0
failCount = 0
result = "Test Results" & Chr$(10) & "============" & Chr$(10)
Dim testName As String
Dim num1, num2 As Integer
testName = "Test IsMissing function"
On Error GoTo errorHandler
num1 = ReturnTwice()
TestLog_ASSERT IsNull(num1)
num2 = 4
num1 = ReturnTwice(2)
TestLog_ASSERT num1 = num2, "the return IsMissing is: " & num1
result = result & Chr$(10) & "Tests passed: " & passCount & Chr$(10) & "Tests failed: " & failCount & Chr$(10)
verify_testIsMissing = result
Exit Function
errorHandler:
TestLog_ASSERT (False), testName & ": hit error handler"
End Function
Sub TestLog_ASSERT(assertion As Boolean, Optional testId As String, Optional testComment As String)
If assertion = True Then
passCount = passCount + 1
Else
Dim testMsg As String
If Not IsMissing(testId) Then
testMsg = testMsg + " : " + testId
End If
If Not IsMissing(testComment) And Not (testComment = "") Then
testMsg = testMsg + " (" + testComment + ")"
End If
result = result & Chr$(10) & " Failed: " & testMsg
failCount = failCount + 1
End If
End Sub
' Function procedure definition.
Function ReturnTwice(Optional A)
If IsMissing(A) Then
' If argument is missing, return a Null.
ReturnTwice = Null
Else
' If argument is present, return twice the value.
ReturnTwice = A * 2
End If
End Function
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