Fix README and add a test so it won't happen again

README.md

@@ -163,7 +163,7 @@ using the matched rule and runs it. Rules enabled by default are as follows:
 * `grep_recursive` – adds `-r` when you trying to `grep` directory;
 * `gulp_not_task` – fixes misspelled gulp tasks;
 * `has_exists_script` – prepends `./` when script/binary exists;
-* `heroku_no_command` – fixes wrong `heroku` commands like `heroku log`;
+* `heroku_not_command` – fixes wrong `heroku` commands like `heroku log`;
 * `history` – tries to replace command with most similar command from history;
 * `java` – removes `.java` extension when running Java programs;
 * `javac` – appends missing `.java` when compiling Java files;
@@ -185,7 +185,7 @@ using the matched rule and runs it. Rules enabled by default are as follows:
 * `sl_ls` – changes `sl` to `ls`;
 * `ssh_known_hosts` – removes host from `known_hosts` on warning;
 * `sudo` – prepends `sudo` to previous command if it failed because of permissions;
-* `switch_layout` – switches command from your local layout to en;
+* `switch_lang` – switches command from your local layout to en;
 * `systemctl` – correctly orders parameters of confusing `systemctl`;
 * `test.py` – runs `py.test` instead of `test.py`;
 * `tsuru_login` – runs `tsuru login` if not authenticated or session expired;
@@ -200,6 +200,7 @@ Enabled by default only on specific platforms:
 * `brew_unknown_command` – fixes wrong brew commands, for example `brew docto/brew doctor`;
 * `brew_upgrade` – appends `--all` to `brew upgrade` as per Homebrew's new behaviour;
 * `pacman` – installs app with `pacman` if it is not installed (uses `yaourt` if available).
+* `pacman_not_found` – fix package name with `pacman` or `yaourt`;
 
 Bundled, but not enabled by default:
 

tests/test_readme.py

@@ -0,0 +1,19 @@
+from pathlib import Path
+
+
+def test_readme():
+    with open('README.md') as f:
+        readme = f.read()
+
+        bundled = Path(__file__).parent.parent \
+            .joinpath('thefuck') \
+            .joinpath('rules') \
+            .glob('*.py')
+
+        for rule in bundled:
+            if rule.stem != '__init__' and rule.stem not in readme:
+                raise Exception('Missing rule "{}" in README.md'.format(rule.stem))
+
+
+if __name__ == '__main__':
+    test_readme()