old_contents: """
  The MIT License (MIT)
  
  Copyright (c) 2015-2017 Kim Blomqvist
  
  Permission is hereby granted, free of charge, to any person obtaining a copy
  of this software and associated documentation files (the "Software"), to deal
  in the Software without restriction, including without limitation the rights
  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  copies of the Software, and to permit persons to whom the Software is
  furnished to do so, subject to the following conditions:
  
  The above copyright notice and this permission notice shall be included in
  all copies or substantial portions of the Software.
  
  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  THE SOFTWARE.
  """
  
  import os
  import pytest
  from subprocess import call, check_output
  
  
  @pytest.fixture()
  def t(tmpdir):
      return tmpdir.join('template.j2')
  
  
  def test_simple_variable(t):
      t.write('{{ var is string }}, {{ var }}')
      out = check_output(['yasha', '--var', 'foo', '-o-', str(t)])
      assert out == b'True, foo'
  
  
  def test_boolean(t):
      t.write('{{ var is sameas false }}, {{ var }}')
      out = check_output(['yasha', '--var', 'False', '-o-', str(t)])
      assert out == b'True, False'
  
  
  def test_list(t):
      t.write('{{ var is sequence }}, {{ var | join }}')
      out = check_output(['yasha', '--var', "['foo', 'bar', 'baz']", '-o-', str(t)])
      assert out == b'True, foobarbaz'
  
  
  def test_tuple(t):
      t.write('{{ var is sequence }}, {{ var | join }}')
      out = check_output(['yasha', '--var', "('foo', 'bar', 'baz')", '-o-', str(t)])
      assert out == b'True, foobarbaz'
  
  
  def test_dictionary(t):
      t.write("{{ var is mapping }}, {% for k in 'abc' %}{{ var[k] }}{% endfor %}")
      out = check_output(['yasha', '--var', "{'a': 1, 'b': 2, 'c': 3}", '-o-', str(t)])
      assert out == b'True, 123'
  
  
  def test_number_type(t):
      t.write('{{ var is number }}, {{ var + 1 }}')
      out = check_output(['yasha', '--var', '1', '-o-', str(t)])
      assert out == b'True, 2'
  
  
  def test_comma_separated_list(t):
      t.write('{{ var is sequence }}, {{ var | join }}')
      out = check_output(['yasha', '--var', 'foo,bar,baz', '-o-', str(t)])
      assert out == b'True, foobarbaz'
  
new_contents: """
  The MIT License (MIT)
  
  Copyright (c) 2015-2017 Kim Blomqvist
  
  Permission is hereby granted, free of charge, to any person obtaining a copy
  of this software and associated documentation files (the "Software"), to deal
  in the Software without restriction, including without limitation the rights
  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  copies of the Software, and to permit persons to whom the Software is
  furnished to do so, subject to the following conditions:
  
  The above copyright notice and this permission notice shall be included in
  all copies or substantial portions of the Software.
  
  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  THE SOFTWARE.
  """
  
  import os
  import pytest
  from subprocess import call, check_output
  
  
  @pytest.fixture()
  def t(tmpdir):
      return tmpdir.join('template.j2')
  
  
  def test_simple_variable(t):
      t.write('{{ var is string }}, {{ var }}')
      out = check_output(['yasha', '--var', 'foo', '-o-', str(t)])
      assert out == b'True, foo'
  
  
  def test_boolean(t):
      t.write('{{ var is sameas false }}, {{ var }}')
      out = check_output(['yasha', '--var', 'False', '-o-', str(t)])
      assert out == b'True, False'
  
  
  def test_list(t):
      t.write('{{ var is sequence }}, {{ var | join }}')
      out = check_output(['yasha', '--var', "['foo', 'bar', 'baz']", '-o-', str(t)])
      assert out == b'True, foobarbaz'
  
  
  def test_tuple(t):
      t.write('{{ var is sequence }}, {{ var | join }}')
      out = check_output(['yasha', '--var', "('foo', 'bar', 'baz')", '-o-', str(t)])
      assert out == b'True, foobarbaz'
  
  
  def test_dictionary(t):
      t.write("{{ var is mapping }}, {% for k in 'abc' %}{{ var[k] }}{% endfor %}")
      out = check_output(['yasha', '--var', "{'a': 1, 'b': 2, 'c': 3}", '-o-', str(t)])
      assert out == b'True, 123'
  
  
  def test_number_type(t):
      t.write('{{ var is number }}, {{ var + 1 }}')
      out = check_output(['yasha', '--var', '1', '-o-', str(t)])
      assert out == b'True, 2'
  
  
  def test_comma_separated_list(t):
      t.write('{{ var is sequence }}, {{ var | join }}')
      out = check_output(['yasha', '--var', 'foo,bar,baz', '-o-', str(t)])
      assert out == b'True, foobarbaz'
  
subject: Remove some hidden non-ascii char from a file o.O