add unused fixtures count

Author: Ivan-Feofanov

pytest_deadfixtures.py

@@ -13,7 +13,7 @@
 
 DUPLICATE_FIXTURES_HEADLINE = "\n\nYou may have some duplicate fixtures:"
 UNUSED_FIXTURES_FOUND_HEADLINE = (
-    "Hey there, I believe the following fixture(s) are not being used:"
+    "Hey there, I believe the following {count} fixture(s) are not being used:"
 )
 UNUSED_FIXTURES_NOT_FOUND_HEADLINE = "Cool, every declared fixture is being used."
 
@@ -228,7 +228,7 @@ def show_dead_fixtures(config, session):
 
     tw.line()
     if unused_fixtures:
-        tw.line(UNUSED_FIXTURES_FOUND_HEADLINE, red=True)
+        tw.line(UNUSED_FIXTURES_FOUND_HEADLINE.format(count=len(unused_fixtures)), red=True)
         write_fixtures(tw, unused_fixtures, show_fixture_doc)
     else:
         tw.line(UNUSED_FIXTURES_NOT_FOUND_HEADLINE, green=True)

tests/test_deadfixtures.py

@@ -3,7 +3,7 @@
 from pytest_deadfixtures import (
     DUPLICATE_FIXTURES_HEADLINE,
     EXIT_CODE_ERROR,
-    EXIT_CODE_SUCCESS,
+    EXIT_CODE_SUCCESS, UNUSED_FIXTURES_FOUND_HEADLINE,
 )
 
 
@@ -141,8 +141,10 @@ def test_simple():
     message = message_template.format(
         "same_file_fixture", "test_list_same_file_unused_fixture"
     )
+    output = result.stdout.str()
 
-    assert message in result.stdout.str()
+    assert message in output
+    assert UNUSED_FIXTURES_FOUND_HEADLINE.format(count=1) in output
 
 
 def test_list_same_file_multiple_unused_fixture(pytester, message_template):
@@ -177,6 +179,7 @@ def test_simple():
     assert first in output
     assert second in output
     assert output.index(first) < output.index(second)
+    assert UNUSED_FIXTURES_FOUND_HEADLINE.format(count=2) in output
 
 
 def test_dont_list_conftest_fixture(pytester, message_template):