Add more tests to test_configuration

Dynamic configuration tests. Purpose: make sure that default configuration does 
not throw. Tests catch only very trivial problems (like missing imports after
refactoring)

tests/test_configuration.py

@@ -57,6 +57,35 @@ class TestConfig(TestCase):
 		from powerline.shell import ShellPowerline
 		with replace_module_attr(common, 'urllib_read', urllib_read):
 			ShellPowerline(Args(ext=['tmux'])).renderer.render()
+		reload(common)
+
+	def test_zsh(self):
+		from powerline.shell import ShellPowerline
+		ShellPowerline(Args(last_pipe_status=[1, 0], ext=['shell'], renderer_module='zsh_prompt')).renderer.render()
+
+	def test_bash(self):
+		from powerline.shell import ShellPowerline
+		ShellPowerline(Args(last_exit_code=1, ext=['shell'], renderer_module='bash_prompt', config=[('ext', {'shell': {'theme': 'default_leftonly'}})])).renderer.render()
+
+	def test_ipython(self):
+		from powerline.ipython import IpythonPowerline
+
+		class IpyPowerline(IpythonPowerline):
+			path = None
+			config_overrides = None
+			theme_overrides = {}
+
+		IpyPowerline().renderer.render()
+
+	def test_wm(self):
+		from powerline.segments import common
+		from imp import reload
+		reload(common)
+		from powerline.shell import ShellPowerline
+		with replace_module_attr(common, 'urllib_read', urllib_read):
+			from powerline import Powerline
+			Powerline(ext='wm', renderer_module='pango_markup').renderer.render()
+		reload(common)
 
 
 old_cwd = None