python mock input
from io import StringIO
def enter_name():
name = input('Please enter name: ')
return 'Hello ' + name
# Suppose we want to mock John as an input for a test
# All inputs end with a newline character
mock_input = StringIO('Johnn')
# monkeypatch is the parameter passed in test to mock certain values
def test_enter_name(monkeypatch):
# Here 'sys.stdin' is used to specifically mock the standard input
# The mock has to be set before the function being tested is run
monkeypatch.setattr('sys.stdin', mock_input)
assert enter_name() == 'Hello John'