1 files changed, 17 insertions, 0 deletions
diff --git a/Tests/CMakeLib/testSystemTools.cxx b/Tests/CMakeLib/testSystemTools.cxx
index 96a4819..121e639 100644
--- a/Tests/CMakeLib/testSystemTools.cxx
+++ b/Tests/CMakeLib/testSystemTools.cxx
@@ -93,5 +93,22 @@ int testSystemTools(int /*unused*/, char* /*unused*/ [])
   if (!failed) {
     cmPassed("cmSystemTools::strverscmp working");
   }
+
+  // ----------------------------------------------------------------------
+  // Test cmSystemTools::StringToULong
+  {
+    unsigned long value;
+    cmAssert(cmSystemTools::StringToULong("1", &value) && value == 1,
+             "StringToULong parses a decimal integer.");
+    cmAssert(cmSystemTools::StringToULong(" 1", &value) && value == 1,
+             "StringToULong parses a decimal integer after whitespace.");
+    cmAssert(!cmSystemTools::StringToULong("-1", &value),
+             "StringToULong rejects a negative number.");
+    cmAssert(!cmSystemTools::StringToULong(" -1", &value),
+             "StringToULong rejects a negative number after whitespace.");
+    cmAssert(!cmSystemTools::StringToULong("1x", &value),
+             "StringToULong rejects trailing content.");
+  }
+
   return failed;
 }