Add a function to compare version number strings

Change-Id: I88d3d9040f70e84752ade19001a699f60e9e7636

1 files changed, 40 insertions, 0 deletions

diff --git a/comphelper/qa/string/test_string.cxx b/comphelper/qa/string/test_string.cxx
index 78137a1052fa..5e9f23ffb087 100644
--- a/comphelper/qa/string/test_string.cxx
+++ b/comphelper/qa/string/test_string.cxx
@@ -44,6 +44,7 @@ public:
     void testIsdigitAsciiString();
     void testReverseString();
     void testEqualsString();
+    void testCompareVersionStrings();
 
     CPPUNIT_TEST_SUITE(TestString);
     CPPUNIT_TEST(testNatural);
@@ -57,6 +58,7 @@ public:
     CPPUNIT_TEST(testIsdigitAsciiString);
     CPPUNIT_TEST(testReverseString);
     CPPUNIT_TEST(testEqualsString);
+    CPPUNIT_TEST(testCompareVersionStrings);
     CPPUNIT_TEST_SUITE_END();
 };
 
@@ -407,6 +409,44 @@ void TestString::testEqualsString()
     CPPUNIT_ASSERT(!::comphelper::string::equals(aIn, 'A'));
 }
 
+int sign(int n)
+{
+    if (n == 0)
+        return 0;
+    if (n < 0)
+        return -1;
+    else
+        return 1;
+}
+
+void TestString::testCompareVersionStrings()
+{
+#ifdef TEST
+#error TEST already defined
+#endif
+#define TEST(a,b,result) \
+    CPPUNIT_ASSERT(sign(::comphelper::string::compareVersionStrings(a, b)) == result); \
+    if ( result != 0 ) \
+        CPPUNIT_ASSERT(sign(::comphelper::string::compareVersionStrings(b, a)) == -(result))
+
+    TEST("", "", 0);
+    TEST("", "0", -1);
+    TEST("", "a", -1);
+    TEST("0", "1", -1);
+    TEST("1", "2", -1);
+    TEST("2", "10", -1);
+    TEST("01", "1", -1);
+    TEST("01", "001", 1);
+    TEST("1.00", "1", 1);
+    TEST("1.2", "1", 1);
+    TEST("1.01", "1.1", -1);
+    TEST("1.001", "1.1", -1);
+    TEST("1.001", "1.010", -1);
+    TEST("1.2.a", "1.2.b", -1);
+
+#undef TEST
+}
+
 CPPUNIT_TEST_SUITE_REGISTRATION(TestString);
 
 }