Renamed to unknown command to better match current functionality

tests/rules/test_unknown_command.py

@@ -0,0 +1,35 @@
+import pytest
+from thefuck.rules.unknown_command import match, get_new_command
+from tests.utils import Command
+
+
+@pytest.mark.parametrize('command', [
+    Command(script='./bin/hdfs dfs ls', stderr='ls: Unknown command\nDid you mean -ls?  This command begins with a dash.'),
+    Command(script='hdfs dfs ls',
+            stderr='ls: Unknown command\nDid you mean -ls?  This command begins with a dash.'),
+    Command(script='hdfs dfs ls /foo/bar', stderr='ls: Unknown command\nDid you mean -ls?  This command begins with a dash.')])
+def test_match(command):
+    assert match(command, None)
+
+
+@pytest.mark.parametrize('command', [
+    Command(script='./bin/hdfs dfs -ls', stderr=''),
+    Command(script='./bin/hdfs dfs -ls /foo/bar', stderr=''),  
+    Command(script='hdfs dfs -ls -R /foo/bar', stderr=''),  
+    Command()])
+def test_not_match(command):
+    assert not match(command, None)
+
+
+@pytest.mark.parametrize('command, new_command', [
+    (Command('hdfs dfs ls',
+        stderr='ls: Unknown command\nDid you mean -ls?  This command begins with a dash.'), ['hdfs dfs -ls']),
+    (Command('hdfs dfs rm /foo/bar',
+        stderr='rm: Unknown command\nDid you mean -rm?  This command begins with a dash.'), ['hdfs dfs -rm /foo/bar']),
+    (Command('./bin/hdfs dfs ls -R /foo/bar',
+        stderr='ls: Unknown command\nDid you mean -ls?  This command begins with a dash.'), ['./bin/hdfs dfs -ls -R /foo/bar']),
+    (Command('./bin/hdfs dfs -Dtest=fred ls -R /foo/bar',
+        stderr='ls: Unknown command\nDid you mean -ls?  This command begins with a dash.'), ['./bin/hdfs dfs -Dtest=fred -ls -R /foo/bar'])])
+def test_get_new_command(command, new_command):
+    assert get_new_command(command, None) == new_command
+