old_contents: """Misc. tests that don't fit anywhere.
  
  XXX: Try our best to reduce tests in this file.
  """
  
  from pipenv.core import activate_virtualenv
  from pipenv.project import Project
  
  
  import pytest
  
  
  @pytest.mark.code
  @pytest.mark.install
  @pytest.mark.skip(reason='non deterministic')
  def test_code_import_manual(PipenvInstance):
      with PipenvInstance(chdir=True) as p:
          with open('t.py', 'w') as f:
              f.write('import requests')
          p.pipenv('install -c .')
          assert 'requests' in p.pipfile['packages']
  
  
  @pytest.mark.code
  @pytest.mark.virtualenv
  @pytest.mark.project
  def test_activate_virtualenv_no_source():
      command = activate_virtualenv(source=False)
      venv = Project().virtualenv_location
      assert command == '{0}/bin/activate'.format(venv)
  
  
  @pytest.mark.lock
  @pytest.mark.deploy
  @pytest.mark.cli
  def test_deploy_works(PipenvInstance, pypi):
  
      with PipenvInstance(pypi=pypi) as p:
          with open(p.pipfile_path, 'w') as f:
              contents = """
  [packages]
  requests = "==2.14.0"
  flask = "==0.12.2"
  [dev-packages]
  pytest = "==3.1.1"
              """.strip()
              f.write(contents)
          c = p.pipenv('install')
          assert c.return_code == 0
          c = p.pipenv('lock')
          assert c.return_code == 0
          with open(p.pipfile_path, 'w') as f:
              contents = """
  [packages]
  requests = "==2.14.0"
              """.strip()
              f.write(contents)
  
          c = p.pipenv('install --deploy')
          assert c.return_code > 0
  
new_contents: """Misc. tests that don't fit anywhere.
  
  XXX: Try our best to reduce tests in this file.
  """
  
  from pipenv.core import activate_virtualenv
  from pipenv.project import Project
  
  
  import pytest
  
  
  @pytest.mark.code
  @pytest.mark.install
  @pytest.mark.skip(reason='non deterministic')
  def test_code_import_manual(PipenvInstance):
      with PipenvInstance(chdir=True) as p:
          with open('t.py', 'w') as f:
              f.write('import requests')
          p.pipenv('install -c .')
          assert 'requests' in p.pipfile['packages']
  
  
  @pytest.mark.code
  @pytest.mark.virtualenv
  @pytest.mark.project
  def test_activate_virtualenv_no_source():
      command = activate_virtualenv(source=False)
      venv = Project().virtualenv_location
      assert command == '{0}/bin/activate'.format(venv)
  
  
  @pytest.mark.lock
  @pytest.mark.deploy
  @pytest.mark.cli
  def test_deploy_works(PipenvInstance, pypi):
  
      with PipenvInstance(pypi=pypi) as p:
          with open(p.pipfile_path, 'w') as f:
              contents = """
  [packages]
  requests = "==2.14.0"
  flask = "==0.12.2"
  [dev-packages]
  pytest = "==3.1.1"
              """.strip()
              f.write(contents)
          c = p.pipenv('install')
          assert c.return_code == 0
          c = p.pipenv('lock')
          assert c.return_code == 0
          with open(p.pipfile_path, 'w') as f:
              contents = """
  [packages]
  requests = "==2.14.0"
              """.strip()
              f.write(contents)
  
          c = p.pipenv('install --deploy')
          assert c.return_code > 0
  
  
  @pytest.mark.update
  @pytest.mark.lock
  def test_update_locks(PipenvInstance, pypi):
  
      with PipenvInstance(pypi=pypi) as p:
          c = p.pipenv('install requests==2.14.0')
          assert c.return_code == 0
          with open(p.pipfile_path, 'r') as fh:
              pipfile_contents = fh.read()
          pipfile_contents = pipfile_contents.replace('==2.14.0', '*')
          with open(p.pipfile_path, 'w') as fh:
              fh.write(pipfile_contents)
          c = p.pipenv('update requests')
          assert c.return_code == 0
          assert p.lockfile['default']['requests']['version'] == '==2.18.4'
          c = p.pipenv('run pip freeze')
          assert c.return_code == 0
          lines = c.out.splitlines()
          assert 'requests==2.18.4' in [l.strip() for l in lines]
  
subject: Add test to verify `pipenv update`