"""Test the config file handling for coverage.py"""

import os, sys
import coverage

sys.path.insert(0, os.path.split(__file__)[0]) # Force relative import for Py3k
from coveragetest import CoverageTest


class ConfigTest(CoverageTest):
    """Tests of the config file support."""

    def test_default_config(self):
        # Just constructing a coverage() object gets the right defaults.
        cov = coverage.coverage()
        self.assertFalse(cov.config.timid)
        self.assertFalse(cov.config.branch)
        self.assertEqual(cov.config.data_file, ".coverage")

    def test_arguments(self):
        # Arguments to the constructor are applied to the configuation.
        cov = coverage.coverage(timid=True, data_file="fooey.dat")
        self.assert_(cov.config.timid)
        self.assertFalse(cov.config.branch)
        self.assertEqual(cov.config.data_file, "fooey.dat")

    def test_config_file(self):
        # A .coveragerc file will be read into the configuration.
        self.make_file(".coveragerc", """\
            # This is just a bogus .rc file for testing.
            [run]
            timid =         True
            data_file =     .hello_kitty.data
            """)
        cov = coverage.coverage()
        self.assert_(cov.config.timid)
        self.assertFalse(cov.config.branch)
        self.assertEqual(cov.config.data_file, ".hello_kitty.data")

    def test_named_config_file(self):
        # You can name the config file what you like.
        self.make_file("my_cov.ini", """\
            [run]
            timid = True
            ; I wouldn't really use this as a data file...
            data_file = delete.me
            """)
        cov = coverage.coverage(config_file="my_cov.ini")
        self.assert_(cov.config.timid)
        self.assertFalse(cov.config.branch)
        self.assertEqual(cov.config.data_file, "delete.me")

    def test_ignored_config_file(self):
        # You can disable reading the .coveragerc file.
        self.make_file(".coveragerc", """\
            [run]
            timid = True
            data_file = delete.me
            """)
        cov = coverage.coverage(config_file=False)
        self.assertFalse(cov.config.timid)
        self.assertFalse(cov.config.branch)
        self.assertEqual(cov.config.data_file, ".coverage")

    def test_config_file_then_args(self):
        # The arguments override the .coveragerc file.
        self.make_file(".coveragerc", """\
            [run]
            timid = True
            data_file = weirdo.file
            """)
        cov = coverage.coverage(timid=False, data_file=".mycov")
        self.assertFalse(cov.config.timid)
        self.assertFalse(cov.config.branch)
        self.assertEqual(cov.config.data_file, ".mycov")

    def test_data_file_from_environment(self):
        # There's an environment variable for the data_file.
        self.make_file(".coveragerc", """\
            [run]
            timid = True
            data_file = weirdo.file
            """)
        self.set_environ("COVERAGE_FILE", "fromenv.dat")
        cov = coverage.coverage()
        self.assertEqual(cov.config.data_file, "fromenv.dat")
        # But the constructor args override the env var.
        cov = coverage.coverage(data_file="fromarg.dat")
        self.assertEqual(cov.config.data_file, "fromarg.dat")
