add few StartsWith edge case test cases (dotnet/corefx#41016)

adamsitnik · web-flow · commit cbf2f0ccf154 · 2019-09-11T21:57:23.000+02:00
* add Hungarian edge case for IsPrefix * add InvariantCulture.CompareInfo.IsPrefix("o\u0308", "o") edge case Commit migrated from dotnet/corefx@e32d9a2
diff --git a/src/libraries/System.Globalization/tests/CompareInfo/CompareInfoTests.IsPrefix.cs b/src/libraries/System.Globalization/tests/CompareInfo/CompareInfoTests.IsPrefix.cs
@@ -29,6 +29,9 @@ public static IEnumerable<object[]> IsPrefix_TestData()
             yield return new object[] { s_invariantCompare, "dzsdzsfoobar", "ddzsf", CompareOptions.None, false };
             yield return new object[] { s_invariantCompare, "dzsdzsfoobar", "ddzsf", CompareOptions.Ordinal, false };
             yield return new object[] { s_hungarianCompare, "dzsdzsfoobar", "ddzsf", CompareOptions.Ordinal, false };
+            yield return new object[] { s_invariantCompare, "dz", "d", CompareOptions.None, true };
+            yield return new object[] { s_hungarianCompare, "dz", "d", CompareOptions.None, false };
+            yield return new object[] { s_hungarianCompare, "dz", "d", CompareOptions.Ordinal, true };
 
             // Turkish
             yield return new object[] { s_turkishCompare, "interesting", "I", CompareOptions.None, false };
@@ -49,6 +52,7 @@ public static IEnumerable<object[]> IsPrefix_TestData()
             yield return new object[] { s_invariantCompare, "\u00C0nimal", "a\u0300", CompareOptions.OrdinalIgnoreCase, false };
             yield return new object[] { s_invariantCompare, "FooBar", "Foo\u0400Bar", CompareOptions.Ordinal, false };
             yield return new object[] { s_invariantCompare, "FooBA\u0300R", "FooB\u00C0R", CompareOptions.IgnoreNonSpace, true };
+            yield return new object[] { s_invariantCompare, "o\u0308", "o", CompareOptions.None, false };
 
             // Ignore symbols
             yield return new object[] { s_invariantCompare, "Test's can be interesting", "Tests", CompareOptions.IgnoreSymbols, true };
