added test and readme

README.md

@@ -209,6 +209,7 @@ following rules are enabled by default:
 * `git_fix_stash` – fixes `git stash` commands (misspelled subcommand and missing `save`);
 * `git_flag_after_filename` – fixes `fatal: bad flag '...' after filename`
 * `git_help_aliased` &ndash; fixes `git help <alias>` commands replacing <alias> with the aliased command;
+* `git_log` &ndash; replaces `git lock` command with `git log`;
 * `git_merge` &ndash; adds remote to branch names;
 * `git_merge_unrelated` &ndash; adds `--allow-unrelated-histories` when required
 * `git_not_command` &ndash; fixes wrong git commands like `git brnch`;

tests/rules/test_git_log.py

@@ -0,0 +1,25 @@
+import pytest
+from thefuck.rules.git_log import match, get_new_command
+from thefuck.types import Command
+
+
+@pytest.mark.parametrize('script, output', [
+    ('git lock', 'git: \'lock\' is not a git command.'),
+    ('git lock --help', 'git: \'lock\' is not a git command.')])
+def test_match(output, script):
+    assert match(Command(script, output))
+
+
+@pytest.mark.parametrize('script', [
+    'git branch foo',
+    'git checkout feature/test_commit',
+    'git push'])
+def test_not_match(script):
+    assert not match(Command(script, ''))
+
+
+@pytest.mark.parametrize('script, output', [
+    ('git lock', 'git log'),
+    ('git lock --help', 'git log --help')])
+def test_get_new_command(script, output):
+    assert get_new_command(Command(script, '')) == output