Testing for X != 1

Reproducer

$ pip install nose
$ pip install https://github.com/sixty-north/cosmic-ray/zipball/master

$ cosmic-ray run --test-runner nose --baseline=10 example.json hello.py -- test_hello.py:TestHello
$ cosmic-ray report example.json

job ID 1:Outcome.SURVIVED:hello
command: cosmic-ray worker hello replace_NotEq_with_Gt 0 nose -- -v test_hello.py:TestHello
--- mutation diff ---
--- a/example_04/hello.py
+++ b/example_04/hello.py
@@ -3,7 +3,7 @@

 def sayHello(name):
     names = myparser.parseArgs(name)
-    if (len(names) != 1):
+    if (len(names) > 1):
         raise Exception('You can say hello to only one person at a time!')
     return ('Hello, ' + name)

job ID 3:Outcome.SURVIVED:hello
command: cosmic-ray worker hello replace_NotEq_with_Lt 0 nose -- -v test_hello.py:TestHello
--- mutation diff ---
--- a/example_04/hello.py
+++ b/example_04/hello.py
@@ -3,7 +3,7 @@

 def sayHello(name):
     names = myparser.parseArgs(name)
-    if (len(names) != 1):
+    if (len(names) < 1):
         raise Exception('You can say hello to only one person at a time!')
     return ('Hello, ' + name)

total jobs: 9
complete: 9 (100.00%)
survival rate: 22.22%

Now compare the results from TestHelloProperly

$ cosmic-ray run --test-runner nose --baseline=10 example.json hello.py -- test_hello.py:TestHelloProperly
$ cosmic-ray report example.json --full-report
total jobs: 9
complete: 9 (100.00%)
survival rate: 0%

Source code

hello.py

import myparser

def sayHello(name):
    names = myparser.parseArgs(name)

    if len(names) != 1:
        raise Exception("You can say hello to only one person at a time!")

    return "Hello, " + name

myparser.py

def parseArgs(args):
    if not args:
        return []

    return args.split(',')

test_hello.py

import hello
import unittest

class TestHello(unittest.TestCase):
    def test_sayHello_to_one_person(self):
        result = hello.sayHello("Alex")
        self.assertEqual(result, "Hello, Alex")

class TestHelloProperly(TestHello):
    def test_sayHello_to_nobody(self):
        with self.assertRaises(Exception):
            hello.sayHello("")

    def test_sayHello_to_many_people(self):
        with self.assertRaises(Exception):
            hello.sayHello("Alex,Krasi")

if __name__ == "__main__":
    unittest.main()