test/py: highlight warnings in the log summary

Currently, if a test emits a warning message but otherwise passes, there's
no indication of this in the log summary, which can lead to warnings being
missed. Enhance the test logic to explicitly mention warnings in otherwise
passing tests, and not to collapse the log sections for tests with
warnings, so that they're more easily seen when scanning the log.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
diff --git a/test/py/multiplexed_log.py b/test/py/multiplexed_log.py
index 8ca5153..a2cfd71 100644
--- a/test/py/multiplexed_log.py
+++ b/test/py/multiplexed_log.py
@@ -224,6 +224,7 @@
         self.timestamp_start = self._get_time()
         self.timestamp_prev = self.timestamp_start
         self.timestamp_blocks = []
+        self.seen_warning = False
 
         shutil.copy(mod_dir + '/multiplexed_log.css', os.path.dirname(fn))
         self.f.write('''\
@@ -252,6 +253,7 @@
     passed_bcs = passed_bcs.not(":has(.status-xfail)");
     passed_bcs = passed_bcs.not(":has(.status-xpass)");
     passed_bcs = passed_bcs.not(":has(.status-skipped)");
+    passed_bcs = passed_bcs.not(":has(.status-warning)");
     // Hide the passed blocks
     passed_bcs.addClass("hidden");
     // Flip the expand/contract button hiding for those blocks.
@@ -478,8 +480,23 @@
             Nothing.
         """
 
+        self.seen_warning = True
         self._note("warning", msg)
 
+    def get_and_reset_warning(self):
+        """Get and reset the log warning flag.
+
+        Args:
+            None
+
+        Returns:
+            Whether a warning was seen since the last call.
+        """
+
+        ret = self.seen_warning
+        self.seen_warning = False
+        return ret
+
     def info(self, msg):
         """Write an informational note to the log file.
 
@@ -542,6 +559,19 @@
 
         self._note("status-pass", msg, anchor)
 
+    def status_warning(self, msg, anchor=None):
+        """Write a note to the log file describing test(s) which passed.
+
+        Args:
+            msg: A message describing the passed test(s).
+            anchor: Optional internal link target.
+
+        Returns:
+            Nothing.
+        """
+
+        self._note("status-warning", msg, anchor)
+
     def status_skipped(self, msg, anchor=None):
         """Write a note to the log file describing skipped test(s).