Enable entity_reference module
Add tests to verify default display plugin options
Add tests for display plugins to Filter tests
Add index param to assertLinkByHref()
Add negative test for Rendered Entity plugin
Fix docstrings
Capitalize contains in docblock
Rename name of test
Move tests for entity_reference plugins to separate file
Remove un-necessary assignment
Remove EntityEmbed from name of the test
Move all tests inside a single method
Merge remote-tracking branch 'upstream/8.x-1.x' into display-plugin-tests
Merge pull request #75 from cs-shadow/display-plugin-tests

Add tests for entity reference field formatter display