Add basic pycman configuration test

test/test_pycman.py

+import pytest
+
+from pycman.config import init_with_config, init_with_config_and_options, InvalidSyntax
+from pycman.pkginfo import format_attr
+
+
+BAD_CONFIG = """
+Invalid
+NonExistant = /
+"""
+
+CONFIG = """
+[options]
+RootDir = {rootdir}
+DBPath = {dbpath}
+"""
+
+
+def test_init_with_config_invalid(tmpdir):
+    configfile = tmpdir.join("bad.cfg")
+    configfile.write(BAD_CONFIG)
+
+    with pytest.raises(InvalidSyntax) as exc_info:
+        init_with_config(str(configfile))
+    assert "statement outside of a section: 'Invalid'" in str(exc_info.value)
+
+
+def test_init_with_config(tmpdir):
+    rootdir = "/"
+    dbpath = str(tmpdir)
+
+    configfile = tmpdir.join("good.cfg")
+    configfile.write(CONFIG.format(rootdir=rootdir, dbpath=dbpath))
+    handle = init_with_config(str(configfile))
+
+    assert handle.dbpath == dbpath + '/'
+    assert handle.root == rootdir
+
+
+class MockConfig:
+    config = None
+    root = "/"
+    dbpath = "/tmp"
+    gpgdir = "/"
+    arch = "x86_64"
+    logfile = "/var/log/pacman.log"
+    cachedir = "/"
+    debug = False
+
+
+def test_init_with_options():
+    options = MockConfig()
+    handle = init_with_config_and_options(options)
+
+    assert handle.dbpath == options.dbpath + '/'
+    assert handle.root == options.root