basic/qa/vba_tests/isnull.vb

   1 Option VBASupport 1
   2 Option Explicit
   3 Dim passCount As Integer
   4 Dim failCount As Integer
   5 Dim result As String
   6
   7 Function doUnitTest() As String
   8 result = verify_testIsNull()
   9 If failCount <> 0 Or passCount = 0 Then
  10     doUnitTest = result
  11 Else
  12     doUnitTest = "OK"
  13 End If
  14 End Function
  15
  16
  17
  18 Function verify_testIsNull() As String
  19
  20     passCount = 0
  21     failCount = 0
  22
  23     result = "Test Results" & Chr$(10) & "============" & Chr$(10)
  24
  25     Dim testName As String
  26     Dim date1, date2
  27     testName = "Test IsNull function"
  28     On Error GoTo errorHandler
  29
  30     date2 = True
  31     date1 = IsNull(Null)
  32     TestLog_ASSERT date1 = date2, "the return IsNull is: " & date1
  33
  34     date2 = False
  35     date1 = IsNull("")
  36     TestLog_ASSERT date1 = date2, "the return IsNull is: " & date1
  37
  38     result = result & Chr$(10) & "Tests passed: " & passCount & Chr$(10) & "Tests failed: " & failCount & Chr$(10)
  39     verify_testIsNull = result
  40
  41     Exit Function
  42 errorHandler:
  43         TestLog_ASSERT (False), testName & ": hit error handler"
  44 End Function
  45
  46 Sub TestLog_ASSERT(assertion As Boolean, Optional testId As String, Optional testComment As String)
  47
  48     If assertion = True Then
  49         passCount = passCount + 1
  50     Else
  51         Dim testMsg As String
  52         If Not IsMissing(testId) Then
  53             testMsg = testMsg + " : " + testId
  54         End If
  55         If Not IsMissing(testComment) And Not (testComment = "") Then
  56             testMsg = testMsg + " (" + testComment + ")"
  57         End If
  58
  59         result = result & Chr$(10) & " Failed: " & testMsg
  60         failCount = failCount + 1
  61     End If
  62
  63 End Sub
  64