Attempt to fix test expectation.

I'm pretty sure this will fix it, but I've never been able to
build the tests on my Mac so I'm not sure.

Fixes https://gitlab.com/kicad/code/kicad/issues/3928

qa/eeschema/test_sch_sheet_path.cpp

@@ -112,9 +112,9 @@ BOOST_AUTO_TEST_CASE( NonEmpty )
     BOOST_CHECK_EQUAL( m_linear.Last(), &m_sheets[2] );
     BOOST_CHECK_EQUAL( m_linear.LastScreen(), nullptr );
 
-    // don't know what the timestamps will be, but we know the format: /<8 chars>/<8 chars>/
+    // don't know what the uuids will be, but we know the format: /<8-4-4-4-12>/<8-4-4-4-12>/
     BOOST_CHECK_PREDICATE(
-            KI_TEST::IsTimestampStringWithLevels, ( m_linear.PathAsString().ToStdString() )( 2 ) );
+            KI_TEST::IsUUIDPathWithLevels, ( m_linear.PathAsString().ToStdString() )( 2 ) );
 
     // Sheet0 is the root sheet and isn't in the path
     BOOST_CHECK_EQUAL( m_linear.PathHumanReadable(), "/Sheet1/Sheet2/" );

qa/eeschema/timestamp_test_utils.cpp

@@ -39,9 +39,10 @@ bool EndsInTimestamp( const std::string& aStr )
     return IsTimeStampish( aStr.end() - 8, aStr.end() );
 }
 
-bool IsTimestampStringWithLevels( const std::string& aStr, unsigned aLevels )
+bool IsUUIDPathWithLevels( const std::string& aStr, unsigned aLevels )
 {
-    const unsigned tsLen = 8;
+    // A UUID is formated as 8-4-4-4-12
+    const unsigned tsLen = 36;
     const unsigned levelLen = tsLen + 1; // add the /
 
     if( aStr.size() != aLevels * levelLen + 1 )

qa/eeschema/timestamp_test_utils.h

@@ -75,7 +75,7 @@ bool EndsInTimestamp( const std::string& aStr );
  * @param  levels expected levels
  * @return        true if format matches
  */
-bool IsTimestampStringWithLevels( const std::string& aStr, unsigned aLevels );
+bool IsUUIDPathWithLevels( const std::string& aStr, unsigned aLevels );
 
 } // namespace KI_TEST