test coverage increased

.gitignore

 # general things to ignore
 .project
 .pydevproject
+.coverage
 build/
 dist/
 *.egg-info/

pytest.ini

 [pytest]
-addopts = --pep8 -v
+addopts = --pep8 --cov=./ -v
 pep8ignore = 
     *.py E501

tests/data/link_test

+read_test
\ No newline at end of file

tests/test_fail_safe_file_operations.py

@@ -30,6 +30,10 @@ class Test_FailSafeFileOperations(unittest.TestCase):
         none_existing_file_path = os.path.join(self.get_directory_of_current_file(), "data", "none_existing_file")
         file_binary = get_binary_from_file(none_existing_file_path)
         self.assertEqual(file_binary, b'', "content not correct")
+        # Test link
+        link_path = os.path.join(self.get_directory_of_current_file(), "data", "link_test")
+        file_binary = get_binary_from_file(link_path)
+        assert file_binary == 'symbolic link -> read_test'
 
     def test_fail_safe_read_file_string_list(self):
         test_file_path = os.path.join(self.get_directory_of_current_file(), "data", "multiline_test.txt")
@@ -94,7 +98,8 @@ class Test_FailSafeFileOperations(unittest.TestCase):
         result = get_files_in_dir(test_dir_path)
         self.assertIn(os.path.join(test_dir_path, "read_test"), result, "file in root folder not found")
         self.assertIn(os.path.join(test_dir_path, "test_folder/generic_test_file"), result, "file in sub folder not found")
-        self.assertEqual(len(result), 3, "number of found files not correct")
+        print(result)
+        self.assertEqual(len(result), 4, "number of found files not correct")
 
     def test_get_files_in_dir_error(self):
         result = get_files_in_dir("/none_existing/dir")

tests/test_file_functions.py

-import unittest
-from common_helper_files import human_readable_file_size
+import pytest
+import os
 
 
-class Test_file_functions(unittest.TestCase):
+from common_helper_files import human_readable_file_size, read_in_chunks, get_directory_for_filename
 
-    def test_human_readable_file_size(self):
-        self.assertEqual(human_readable_file_size(1024), '1.00 KiB')
-        self.assertEqual(human_readable_file_size(5000), '4.88 KiB')
+TEST_DATA_DIR = os.path.join(get_directory_for_filename(__file__), 'data')
+
+
+@pytest.mark.parametrize('input_data, expected', [
+    (1000, '1000.00 Byte'),
+    (1024, '1.00 KiB'),
+    (1024 * 1024, '1.00 MiB'),
+    (1234.1234, '1.21 KiB'),
+])
+def test_human_readable_file_size(input_data, expected):
+    assert human_readable_file_size(input_data) == expected
+
+
+def test_read_in_chunks():
+    fp = open(TEST_DATA_DIR + '/read_test', 'rb')
+    test_buffer = b''
+    for chunk in read_in_chunks(fp):
+        test_buffer += chunk
+    assert test_buffer == b'this is a test'

tests/test_git_functions.py

+from common_helper_files import get_version_string_from_git
+
+
+def test_get_version_string_from_git():
+    result = get_version_string_from_git('.')
+    assert type(result) == str