bdd: Add test for exception with :pyeval.

tests/integration/features/conftest.py

@@ -323,7 +323,7 @@ def check_contents(quteproc, filename):
 def check_contents(quteproc, text):
     """Check the current page's content."""
     content = quteproc.get_content().strip()
-    assert content == text
+    assert text in content
 
 
 @bdd.then(bdd.parsers.parse("the following tabs should be open:\n{tabs}"))

tests/integration/features/misc.feature

@@ -299,6 +299,11 @@ Feature: Various utility commands.
         And I wait until qute:pyeval is loaded
         Then the page should contain the plaintext "2"
 
+    Scenario: Causing exception in :pyeval
+        When I run :debug-pyeval 1/0
+        And I wait until qute:pyeval is loaded
+        Then the page should contain the plaintext "ZeroDivisionError"
+
     Scenario: Running :pyeval with --quiet
         When I run :debug-pyeval --quiet 1+1
         Then "pyeval output: 2" should be logged