deno coverage umbrella issue

[bartlomieju]

Umbrella issue for all the reported quirks and suggestions to deno coverage:

• Add a default and configured threshold for deno coverage #9669
• Deno coverage panic with import-maps #9747
• deno test --coverage doesn't seem accurate #9754
• 🐛 deno coverage line and branch counts are incorrect #9865
• deno coverage doesn't use import maps and is unable to retrieve files #10395
• deno coverage lack for constructor returns #10531
• A final blankline in a file prevents 100% code coverage #11327
• Make DENO_COVERAGE_DIR public #11560
• deno test --coverage generates invalid JSON in certain conditions that breaks deno coverage #12112
• Missing coverage #11875
• Coverage only works when individual test files are run #12751
• Coverage will be inaccurate if multiple test files import module #10944
• Coverage Lcov Output Wrong? #12126
• deno coverage --unstable --lcov causes panic in ubuntu runner in deno_std ci #10420
• Inaccurate test coverage might be caused by emojis #10936
• Coverage is broken in deno_std #13111
• Test coverage report incorrectly shows error thrown as not covered #13323
• deno coverage outputs incorrect output from typescript files #13310
• deno coverage errors with type error if the source code uses custom "lib" configuration #13326
• deno coverage shouldn't run type checks #13161

[zandaqo]

Also these two likely related issues with accuracy where testing individual files shows different coverage to testing multiple files:

• Missing coverage #11875
• Coverage only works when individual test files are run #12751

[bartlomieju]

Thanks @zandaqo I added them to the list.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed in 7 days if no further activity occurs. Thank you for your contributions.

[rivy]

Not stale.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed in 7 days if no further activity occurs. Thank you for your contributions.

[rivy]

Not stale.

[rivy]

Just FYI, line counts and branch detection are still broken today with the most recent Deno (v1.30.0); see #9865.

[lowlighter]

Adding

• Code coverage is not collected from Worker context(s) #13206