basic: Add CDec unit test

Change-Id: I9152f00239e5d407f9b33016caadb6a01770fed3

basic/qa/cppunit/test_vba.cxx

@@ -39,6 +39,7 @@ void VBATest::testMiscVBAFunctions()
 {
     const char* macroSource[] = {
         "bytearraystring.vb",
+        "cdec.vb",
 // datevalue test seems to depend on both locale and language
 // settings, should try and rewrite the test to deal with that
 // for some reason tinderboxes don't seem to complain leaving enabled

basic/qa/vba_tests/cdec.vb

+Option VBASupport 1
+Option Explicit
+Dim passCount As Integer
+Dim failCount As Integer
+Dim result As String
+
+Function doUnitTest() As String
+result = verify_testCDec()
+If failCount <> 0 And passCount > 0 Then
+    doUnitTest = result
+Else
+    doUnitTest = "OK"
+End If
+End Function
+
+Function verify_testCDec() as String
+    passCount = 0
+    failCount = 0
+
+    result = "Test Results" & Chr$(10) & "============" & Chr$(10)
+
+    Dim testName As String
+    Dim ret As Double
+    testName = "Test CDec function"
+    On Error GoTo errorHandler
+    
+    ret = CDec("")
+    TestLog_ASSERT ret = 0, "Converts the string to uppercase characters:" & ret
+
+    ret = CDec("1234")
+    TestLog_ASSERT ret = "1234", "Converts the string to uppercase characters:" & ret
+
+    ret = CDec("  1234  ")
+    TestLog_ASSERT ret = 1234, "Converts the string to uppercase characters:" & ret
+
+    '''''''''''''''
+    ' Those are erroneous, see i#64348
+    ret = CDec("1234-")
+    TestLog_ASSERT ret = -1234, "Converts the string to uppercase characters:" & ret
+
+    ret = CDec("  1234  -")
+    TestLog_ASSERT ret = -1234, "Converts the string to uppercase characters:" & ret
+
+    ret = CDec("79228162514264400000000000000")
+    TestLog_ASSERT ret = 62406456049664, "Converts the string to uppercase characters:" & ret
+
+    result = result & Chr$(10) & "Tests passed: " & passCount & Chr$(10) & "Tests failed: " & failCount & Chr$(10)
+    verify_testCDec = result
+
+    Exit Function
+errorHandler:
+        TestLog_ASSERT (False), testName & ": hit error handler"
+End Function
+
+Sub TestLog_ASSERT(assertion As Boolean, Optional testId As String, Optional testComment As String)
+
+    If assertion = True Then
+        passCount = passCount + 1
+    Else
+        Dim testMsg As String
+        If Not IsMissing(testId) Then
+            testMsg = testMsg + " : " + testId
+        End If
+        If Not IsMissing(testComment) And Not (testComment = "") Then
+            testMsg = testMsg + " (" + testComment + ")"
+        End If
+
+        result = result & Chr$(10) & " Failed: " & testMsg
+        failCount = failCount + 1
+    End If
+    
+End Sub