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import unittest
from StringIO import StringIO

from modules.commands.queries import *
from modules.mock_bugzillatool import *

class QueryCommandsTest(unittest.TestCase):
    def _capture_output_with_name(output_name):
        self.saved_outputs[output_name] = getattr(sys, output_name)
        setattr(sys, output_name, StringIO.StringIO())

    def _release_output_with_name(output_name):
        captured_output = getattr(sys, output_name).getvalue()
        setattr(sys, output_name, self.saved_outputs[output_name])
        del self.saved_outputs[output_name]
        return captured_output

    def _capture_output(self):
        self._capture_output_with_name("stdout")
        self._capture_output_with_name("stderr")

    def _restore_output(self):
        return (self._release_output_with_name("stdout"), self._release_output_with_name("stderr"))

    def _assert_execute_outputs(self, command, command_args, expected_stdout, expected_stderr = ""):
        self._capture_output()
        command.execute(None, command_args, MockBugzillaTool())
        (stdout_string, stderr_string) = self._restore_output()
        self.assertEqual(stdout_string, expected_stdout)
        self.assertEqual(expected_stderr, expected_stderr)

    def test_bugs_to_commit(self):
        self._assert_execute_outputs(BugsToCommit(), None, "42\n75\n")

    def test_patches_to_commit(self):
        expected_stdout = "http://example.com/197\nhttp://example.com/128\n"
        expected_stderr = "Patches in commit queue:\n"
        self._assert_execute_outputs(PatchesToCommit(), None, expected_stdout, expected_stderr)

    def test_reviewed_patches(self):
        expected_stdout = "http://example.com/197\nhttp://example.com/128\n"
        self._assert_execute_outputs(ReviewedPatches(), [42], expected_stdout)

    def test_tree_status(self):
        expected_stdout = "ok   : Builder1\nok   : Builder2\n"
        self._assert_execute_outputs(TreeStatus(), None, expected_stdout)