Fix: --fixtures only shows fixtures from first file

CHANGELOG

@@ -4,6 +4,11 @@
 - preserve warning functions after call to pytest.deprecated_call. Thanks
   Pieter Mulder for PR.
 
+- fix issue833: --fixtures now shows all fixtures of collected test files, instead of just the
+  fixtures declared on the first one.
+  Thanks Florian Bruhin for reporting and Bruno Oliveira for the PR.
+
+
 2.7.2 (compared to 2.7.1)
 -----------------------------
 
@@ -27,7 +32,7 @@
   Thanks Thomas De Schampheleire for reporting and Bruno Oliveira for the PR.
 
 - fix issue718: failed to create representation of sets containing unsortable
-  elements in python 2. Thanks Edison Gustavo Muenz
+  elements in python 2. Thanks Edison Gustavo Muenz.
 
 - fix issue756, fix issue752 (and similar issues): depend on py-1.4.29
   which has a refined algorithm for traceback generation.

_pytest/python.py

@@ -939,21 +939,13 @@ def showfixtures(config):
 def _showfixtures_main(config, session):
     session.perform_collect()
     curdir = py.path.local()
-    if session.items:
-        nodeid = session.items[0].nodeid
-    else:
-        part = session._initialparts[0]
-        nodeid = "::".join(map(str, [curdir.bestrelpath(part[0])] + part[1:]))
-        nodeid.replace(session.fspath.sep, "/")
-
     tw = py.io.TerminalWriter()
     verbose = config.getvalue("verbose")
 
     fm = session._fixturemanager
 
     available = []
-    for argname in fm._arg2fixturedefs:
-        fixturedefs = fm.getfixturedefs(argname, nodeid)
+    for argname, fixturedefs in fm._arg2fixturedefs.items():
         assert fixturedefs is not None
         if not fixturedefs:
             continue

testing/python/fixture.py

@@ -2483,6 +2483,44 @@ def arg2():
         """)
 
 
+    def test_show_fixtures_different_files(self, testdir):
+        """
+        #833: --fixtures only shows fixtures from first file
+        """
+        testdir.makepyfile(test_a='''
+            import pytest
+
+            @pytest.fixture
+            def fix_a():
+                """Fixture A"""
+                pass
+
+            def test_a(fix_a):
+                pass
+        ''')
+        testdir.makepyfile(test_b='''
+            import pytest
+
+            @pytest.fixture
+            def fix_b():
+                """Fixture B"""
+                pass
+
+            def test_b(fix_b):
+                pass
+        ''')
+        result = testdir.runpytest("--fixtures")
+        result.stdout.fnmatch_lines("""
+            * fixtures defined from test_a *
+            fix_a
+                Fixture A
+
+            * fixtures defined from test_b *
+            fix_b
+                Fixture B
+        """)
+
+
 class TestContextManagerFixtureFuncs:
     def test_simple(self, testdir):
         testdir.makepyfile("""