[3.6] bpo-32356: idempotent pause_/resume_reading (GH-4914) (GH-7629)

Backport note: don't add new is_reading() method from master to 3.6.

(cherry picked from commit d757aaf9dd767d13205bf9917e520ebf43e7f6e5)

1 files changed, 12 insertions, 5 deletions

diff --git a/Lib/asyncio/test_utils.py b/Lib/asyncio/test_utils.py
index 8b8c22a..f417204 100644
--- a/Lib/asyncio/test_utils.py
+++ b/Lib/asyncio/test_utils.py
@@ -335,12 +335,19 @@ class TestLoop(base_events.BaseEventLoop):
             return False
 
     def assert_reader(self, fd, callback, *args):
-        assert fd in self.readers, 'fd {} is not registered'.format(fd)
+        if fd not in self.readers:
+            raise AssertionError(f'fd {fd} is not registered')
         handle = self.readers[fd]
-        assert handle._callback == callback, '{!r} != {!r}'.format(
-            handle._callback, callback)
-        assert handle._args == args, '{!r} != {!r}'.format(
-            handle._args, args)
+        if handle._callback != callback:
+            raise AssertionError(
+                f'unexpected callback: {handle._callback} != {callback}')
+        if handle._args != args:
+            raise AssertionError(
+                f'unexpected callback args: {handle._args} != {args}')
+
+    def assert_no_reader(self, fd):
+        if fd in self.readers:
+            raise AssertionError(f'fd {fd} is registered')
 
     def _add_writer(self, fd, callback, *args):
         self.writers[fd] = events.Handle(callback, args, self)