1 files changed, 137 insertions, 0 deletions
diff --git a/basic/qa/vba_tests/datediff.vb b/basic/qa/vba_tests/datediff.vb
new file mode 100644
index 000000000..1b5e7ebf4
--- /dev/null
+++ b/basic/qa/vba_tests/datediff.vb
@@ -0,0 +1,137 @@
+Option VBASupport 1
+Option Explicit
+Dim passCount As Integer
+Dim failCount As Integer
+Dim result As String
+
+Function doUnitTest() As String
+result = verify_testDateDiff()
+If failCount <> 0 Or passCount = 0 Then
+    doUnitTest = result
+Else
+    doUnitTest = "OK"
+End If
+End Function
+
+
+
+Function verify_testDateDiff() As String
+
+    passCount = 0
+    failCount = 0
+
+    result = "Test Results" & Chr$(10) & "============" & Chr$(10)
+
+    Dim testName As String
+    Dim date1
+    Dim date2
+    testName = "Test DateDiff function"
+    On Error GoTo errorHandler
+
+    date2 = 10
+    date1 = DateDiff("yyyy", "22/11/2003", "22/11/2013")
+    TestLog_ASSERT date1 = date2, "the return DateDiff is: " & date1
+
+    date2 = 40
+    date1 = DateDiff("q", "22/11/2003", "22/11/2013")
+    TestLog_ASSERT date1 = date2, "the return DateDiff is: " & date1
+
+    date2 = 120
+    date1 = DateDiff("m", "22/11/2003", "22/11/2013")
+    TestLog_ASSERT date1 = date2, "the return DateDiff is: " & date1
+
+    date2 = 3653
+    date1 = DateDiff("y", "22/11/2003", "22/11/2013")
+    TestLog_ASSERT date1 = date2, "the return DateDiff is: " & date1
+
+    date2 = 3653
+    date1 = DateDiff("d", "22/11/2003", "22/11/2013")
+    TestLog_ASSERT date1 = date2, "the return DateDiff is: " & date1
+
+    date2 = 521
+    date1 = DateDiff("w", "22/11/2003", "22/11/2013")
+    TestLog_ASSERT date1 = date2, "the return DateDiff is: " & date1
+
+    date2 = 522
+    date1 = DateDiff("ww", "22/11/2003", "22/11/2013")
+    TestLog_ASSERT date1 = date2, "the return DateDiff is: " & date1
+
+    date2 = 87672
+    date1 = DateDiff("h", "22/11/2003", "22/11/2013")
+    TestLog_ASSERT date1 = date2, "the return DateDiff is: " & date1
+
+    date2 = 525600
+    date1 = DateDiff("n", "22/11/2012", "22/11/2013")
+    TestLog_ASSERT date1 = date2, "the return DateDiff is: " & date1
+
+    date2 = 2678400
+    date1 = DateDiff("s", "22/10/2013", "22/11/2013")
+    TestLog_ASSERT date1 = date2, "the return DateDiff is: " & date1
+
+    date2 = 3653
+    date1 = DateDiff("d", "22/11/2003", "22/11/2013", vbFriday)
+    TestLog_ASSERT date1 = date2, "the return DateDiff is: " & date1
+
+    date2 = 3653
+    date1 = DateDiff("d", "22/11/2003", "22/11/2013", vbMonday)
+    TestLog_ASSERT date1 = date2, "the return DateDiff is: " & date1
+
+    date2 = 3623
+    date1 = DateDiff("d", "22/12/2003", "22/11/2013", vbSaturday)
+    TestLog_ASSERT date1 = date2, "the return DateDiff is: " & date1
+
+    date2 = 3684
+    date1 = DateDiff("d", "22/10/2003", "22/11/2013", vbSunday)
+    TestLog_ASSERT date1 = date2, "the return DateDiff is: " & date1
+
+    date2 = 3653
+    date1 = DateDiff("d", "22/11/2003", "22/11/2013", vbThursday)
+    TestLog_ASSERT date1 = date2, "the return DateDiff is: " & date1
+
+    date2 = 3653
+    date1 = DateDiff("d", "22/11/2003", "22/11/2013", vbTuesday)
+    TestLog_ASSERT date1 = date2, "the return DateDiff is: " & date1
+
+    date2 = 3653
+    date1 = DateDiff("d", "22/11/2003", "22/11/2013", vbFriday, vbFirstJan1)
+    TestLog_ASSERT date1 = date2, "the return DateDiff is: " & date1
+
+    date2 = 3653
+    date1 = DateDiff("d", "22/11/2003", "22/11/2013", vbThursday, vbFirstFourDays)
+    TestLog_ASSERT date1 = date2, "the return DateDiff is: " & date1
+
+    date2 = 3653
+    date1 = DateDiff("d", "22/11/2003", "22/11/2013", vbSunday, vbFirstFullWeek)
+    TestLog_ASSERT date1 = date2, "the return DateDiff is: " & date1
+
+    date2 = 3653
+    date1 = DateDiff("d", "22/11/2003", "22/11/2013", vbSaturday, vbFirstFullWeek)
+    TestLog_ASSERT date1 = date2, "the return DateDiff is: " & date1
+
+    result = result & Chr$(10) & "Tests passed: " & passCount & Chr$(10) & "Tests failed: " & failCount & Chr$(10)
+    verify_testDateDiff = result
+
+    Exit Function
+errorHandler:
+        TestLog_ASSERT (False), testName & ": hit error handler"
+End Function
+
+Sub TestLog_ASSERT(assertion As Boolean, Optional testId As String, Optional testComment As String)
+
+    If assertion = True Then
+        passCount = passCount + 1
+    Else
+        Dim testMsg As String
+        If Not IsMissing(testId) Then
+            testMsg = testMsg + " : " + testId
+        End If
+        If Not IsMissing(testComment) And Not (testComment = "") Then
+            testMsg = testMsg + " (" + testComment + ")"
+        End If
+
+        result = result & Chr$(10) & " Failed: " & testMsg
+        failCount = failCount + 1
+    End If
+
+End Sub
+