improve(tests): add test for --ignore option

tests/_data_ignore/.ignore_second/ignored.py

@@ -0,0 +1,2 @@
+# Everything in here should be ignored
+from getpass import getpass

tests/_data_ignore/.ignored_dir/ignored.py

@@ -0,0 +1,2 @@
+# Everything in here should be ignored
+import click

tests/_data_ignore/test.py

@@ -0,0 +1,61 @@
+"""unused import"""
+# pylint: disable=undefined-all-variable, import-error, no-absolute-import, too-few-public-methods, missing-docstring
+import xml.etree  # [unused-import]
+import xml.sax  # [unused-import]
+import os.path as test  # [unused-import]
+from sys import argv as test2  # [unused-import]
+from sys import flags  # [unused-import]
+# +1:[unused-import,unused-import]
+from collections import deque, OrderedDict, Counter
+# All imports above should be ignored
+import requests  # [unused-import]
+
+# setuptools
+import zipimport  # command/easy_install.py
+
+# twisted
+from importlib import invalidate_caches  # python/test/test_deprecate.py
+
+# astroid
+import zipimport  # manager.py
+# IPython
+from importlib.machinery import all_suffixes  # core/completerlib.py
+import importlib  # html/notebookapp.py
+
+from IPython.utils.importstring import import_item  # Many files
+
+# pyflakes
+# test/test_doctests.py
+from pyflakes.test.test_imports import Test as TestImports
+
+# Nose
+from nose.importer import Importer, add_path, remove_path  # loader.py
+
+import atexit
+from __future__ import print_function
+from docopt import docopt
+import curses, logging, sqlite3
+import logging
+import os
+import sqlite3
+import time
+import sys
+import signal
+import bs4
+import nonexistendmodule
+import boto as b, peewee as p
+# import django
+import flask.ext.somext  # # #
+from sqlalchemy import model
+try:
+    import ujson as json
+except ImportError:
+    import json
+
+import models
+
+
+def main():
+    pass
+
+import after_method_is_valid_even_if_not_pep8

tests/test_pipreqs.py

@@ -25,6 +25,7 @@ class TestPipreqs(unittest.TestCase):
         self.local = ["docopt", "requests", "nose", 'pyflakes']
         self.project = os.path.join(os.path.dirname(__file__), "_data")
         self.project_invalid = os.path.join(os.path.dirname(__file__), "_invalid_data")
+        self.project_with_ignore_directory = os.path.join(os.path.dirname(__file__), "_data_ignore")
         self.requirements_path = os.path.join(self.project, "requirements.txt")
         self.alt_requirement_path = os.path.join(
             self.project, "requirements2.txt")
@@ -144,6 +145,24 @@ class TestPipreqs(unittest.TestCase):
         self.assertRaises(requests.exceptions.MissingSchema, pipreqs.init, {'<path>': self.project, '--savepath': None,
                           '--use-local': None, '--force': True, '--proxy': None, '--pypi-server': 'nonexistent'})
 
+    def test_ignored_directory(self):
+        """
+        Test --ignore parameter
+        """
+        pipreqs.init(
+            {'<path>': self.project_with_ignore_directory, '--savepath': None,
+                      '--use-local': None, '--force': True,
+                      '--proxy':None,
+                      '--pypi-server':None,
+                      '--ignore':['.ignored_dir', '.ignore_second']
+            }
+        )
+        with open(os.path.join(self.project_with_ignore_directory, "requirements.txt"), "r") as f:
+            data = f.read().lower()
+            for item in ['click', 'getpass']:
+                self.assertFalse(item.lower() in data)
+
+
     def tearDown(self):
         """
         Remove requiremnts.txt files that were written