subplot.py: Add stderr functions like stdout ones

Signed-off-by: Daniel Silverstone <dsilvers@digital-scurf.org>

1 files changed, 16 insertions, 0 deletions

diff --git a/subplot.py b/subplot.py
index 2b91497..a64134a 100644
--- a/subplot.py
+++ b/subplot.py
@@ -119,6 +119,22 @@ def stdout_does_not_match(ctx, pattern=None):
         print('ctx:', ctx.as_dict())
     assert_eq(pattern not in stdout, True)
 
+def stderr_matches(ctx, pattern=None):
+    stderr = ctx.get('stderr', '')
+    if pattern not in stderr:
+        print('pattern:', repr(pattern))
+        print('stderr:', repr(stderr))
+        print('ctx:', ctx.as_dict())
+    assert_eq(pattern in stderr, True)
+
+def stderr_does_not_match(ctx, pattern=None):
+    stderr = ctx.get('stderr', '')
+    if pattern not in stderr:
+        print('pattern:', repr(pattern))
+        print('stderr:', repr(stderr))
+        print('ctx:', ctx.as_dict())
+    assert_eq(pattern not in stderr, True)
+
 def _get_metadata(filename):
     st = os.lstat(filename)
     keys = [