Runs mix test --cover with Six as the coverage tool.
mix six [options] [-- test_args]Options
--threshold N- Report threshold for formatter output (default: 90)--minimum-coverage N- Fail if total coverage drops below N--output-dir DIR- Output directory (default: .six/)--skip FILE- Additional file pattern to skip (repeatable)--track-ignores- Write a.sixignorefile at the project root tracking all explicit coverage exclusions. Commit this file to review ignore changes in PRs.--import-cover DIR- Import .coverdata files from DIR and generate a report without running tests. Used to merge coverage from partitioned CI runs.
Any arguments after -- are passed through to mix test.