Added brew_upgrade rule

tests/rules/test_brew_upgrade.py

@@ -0,0 +1,15 @@
+import pytest
+from thefuck.rules.brew_upgrade import match, get_new_command
+from tests.utils import Command
+
+
+@pytest.mark.parametrize('command', [
+	Command(script='brew upgrade')])
+def test_match(command):
+	assert match(command, None)
+
+
+@pytest.mark.parametrize('command, new_command', [
+	(Command('brew upgrade'), 'brew upgrade --all')])
+def test_get_new_command(command, new_command):
+	assert get_new_command(command, None) == new_command