introduce reading of setup.cfg / ini-style configuration files

rename internal config.Error to pytest.UsageError

--HG--
branch : trunk

testing/acceptance_test.py

@@ -4,7 +4,8 @@ class TestGeneralUsage:
     def test_config_error(self, testdir):
         testdir.makeconftest("""
             def pytest_configure(config):
-                raise config.Error("hello")
+                import pytest
+                raise pytest.UsageError("hello")
         """)
         result = testdir.runpytest(testdir.tmpdir)
         assert result.ret != 0

testing/conftest.py

@@ -41,6 +41,12 @@ def pytest_unconfigure(config, __multicall__):
     assert len2 < config._numfiles + 7, out2
 
 
+def pytest_runtest_setup(item):
+    item._oldir = py.path.local()
+
+def pytest_runtest_teardown(item):
+    item._oldir.chdir()
+
 def pytest_generate_tests(metafunc):
     multi = getattr(metafunc.function, 'multi', None)
     if multi is not None:

testing/test_config.py

@@ -1,9 +1,55 @@
 import py
 
+from pytest.plugin.config import getcfg, Config
+
+class TestParseIni:
+    def test_getcfg_and_config(self, tmpdir):
+        sub = tmpdir.mkdir("sub")
+        sub.chdir()
+        tmpdir.join("setup.cfg").write(py.code.Source("""
+            [pytest]
+            name = value
+        """))
+        cfg = getcfg([sub], ["setup.cfg"])
+        assert cfg['name'] == "value"
+        config = Config()
+        config._preparse([sub])
+        assert config.inicfg['name'] == 'value'
+
+    def test_getvalue(self, tmpdir):
+        tmpdir.join("setup.cfg").write(py.code.Source("""
+            [pytest]
+            verbose = True
+        """))
+        config = Config()
+        config._preparse([tmpdir])
+        assert config.option.verbose
+
+    def test_append_parse_args(self, tmpdir):
+        tmpdir.join("setup.cfg").write(py.code.Source("""
+            [pytest]
+            appendargs = --verbose
+        """))
+        config = Config()
+        config.parse([tmpdir])
+        assert config.option.verbose
+
+    def test_tox_ini_wrong_version(self, testdir):
+        p = testdir.makefile('.ini', tox="""
+            [pytest]
+            minversion=9.0
+        """)
+        result = testdir.runpytest()
+        assert result.ret != 0
+        result.stderr.fnmatch_lines([
+            "*tox.ini:2*requires*9.0*actual*"
+        ])
+
 class TestConfigCmdlineParsing:
     def test_parser_addoption_default_env(self, testdir, monkeypatch):
         import os
         config = testdir.Config()
+        config._preparse([testdir.tmpdir])
         group = config._parser.getgroup("hello")
 
         monkeypatch.setitem(os.environ, 'PYTEST_OPTION_OPTION1', 'True')