1 files changed, 43 insertions, 0 deletions
diff --git a/basic/qa/basic_coverage/test_option_base.bas b/basic/qa/basic_coverage/test_option_base.bas
new file mode 100644
index 000000000..11afea50d
--- /dev/null
+++ b/basic/qa/basic_coverage/test_option_base.bas
@@ -0,0 +1,43 @@
+Option Base 1
+Option Explicit
+
+Function doUnitTest() As String
+    TestUtil.TestInit
+    verify_optionBase
+    doUnitTest = TestUtil.GetResult()
+End Function
+
+Sub verify_optionBase() As String
+    On Error GoTo errorHandler
+
+    ' tdf#54912 - with option base arrays should start at index 1.
+    ' Without option compatible the upper bound is changed as well (#109275).
+    Dim strArray(2) As String
+    TestUtil.AssertEqual(LBound(strArray), 1, "Lower bound of a string array (before assignment): " & LBound(strArray))
+    TestUtil.AssertEqual(UBound(strArray), 3, "Upper bound of a string array (before assignment): " & UBound(strArray))
+    strArray = Array("a", "b")
+    TestUtil.AssertEqual(LBound(strArray), 1, "Lower bound of a string array (after assignment): " & LBound(strArray))
+    TestUtil.AssertEqual(UBound(strArray), 2, "Upper bound of a string array (after assignment): " & UBound(strArray))
+
+    Dim intArray(2) As Integer
+    TestUtil.AssertEqual(LBound(intArray), 1, "Lower bound of an integer array (before assignment): " & LBound(intArray))
+    TestUtil.AssertEqual(UBound(intArray), 3, "Upper bound of an integer array (before assignment): " & UBound(intArray))
+    intArray = Array(1, 2)
+    TestUtil.AssertEqual(LBound(intArray), 1, "Lower bound of an integer array (after assignment): " & LBound(intArray))
+    TestUtil.AssertEqual(UBound(intArray), 2, "Upper bound of an integer array (after assignment): " & UBound(intArray))
+
+    Dim byteArray(2) As Byte
+    TestUtil.AssertEqual(LBound(byteArray), 1, "Lower bound of a byte array (before assignment): " & LBound(byteArray))
+    TestUtil.AssertEqual(UBound(byteArray), 3, "Upper bound of a byte array (before assignment): " & UBound(byteArray))
+    byteArray = StrConv("ab", 128)
+    TestUtil.AssertEqual(LBound(byteArray), 1, "Lower bound of a byte array (StrConv): " & LBound(byteArray))
+    TestUtil.AssertEqual(UBound(byteArray), 2, "Upper bound of a byte array (StrConv): " & UBound(byteArray))
+
+    ReDim byteArray(3)
+    TestUtil.AssertEqual(LBound(byteArray), 1, "Lower bound of a byte array (ReDim): " & LBound(byteArray))
+    TestUtil.AssertEqual(UBound(byteArray), 4, "Upper bound of a byte array (ReDim): " & UBound(byteArray))
+
+    Exit Sub
+errorHandler:
+    TestUtil.ReportErrorHandler("verify_optionBase", Err, Error$, Erl)
+End Sub