Null and case coverage fixes

[elsaperelli]

Summary

A @hossenlopp and @elsaperelli collab.

This PR addresses https://oncprojectracking.healthit.gov/support/browse/BONNIEMAT-1479. The measure and test cases provided in this ticket can now reach 100% clause coverage. The case in which CQL case statements were not properly being included in the clause coverage calculation and the clause coverage highlighting was discovered as a result of #262.

New behavior

In the above ticket, the else null clause in the SDE Sex definition could never be highlighted. We now have a way to identify Null literals (and Literal types with value false) and make sure they are highlighted based on whether or not they were executed rather than their value (which is null or false).

In addition, we noticed that the when and then parts of the case statements were not getting highlighted even though they were included in the clause coverage calculation. This also required an update in findAllLocalIdsInStatement in ClauseResultsHelpers.ts so that when pieces of CaseItems get results from the expression that defines them (use of sourceLocalId).

Code changes

• .gitignore - Update paths.
• ClauseResultsBuilder.ts - Update setFinalResults() to set the result of a Null or Literal false to true if its localId exists in rawClauseResults.
• ClauseResultsHelpers.ts - Update findAllLocalIdsInStatement() to handle when pieces of CaseItems, nulls, and false literals.
• ClauseResultsHelper.test.ts - Add unit tests for the new cases.
• CaseStatement.cql - simple CQL of a case statement for unit testing.
• CaseStatement.json - generated ELM json (generated using the Makefile in this directory) from CaseStatement.cql for unit tests.

Testing guidance

• npm run test:plus
• npm run check
• Run detailed on the measure and test cases provided in the above onc ticket. The clause coverage should be 98.9%. However, if you add a test case where the patient's gender is unknown and change "ombCategory" in SDE Race and SDE Ethnicity to be "detailed", then you should get 100%.
• Test out other measure and test cases and see if you get the results that you expect.

[github-actions[bot]]

Coverage report

St.:grey_question:	Category	Percentage	Covered / Total
🟢	Statements	86.49% (+0.34% 🔼)	2350/2717
🟡	Branches	73.69% (+0.56% 🔼)	2171/2946
🟢	Functions	89.08%	424/476
🟢	Lines	86.85% (+0.35% 🔼)	2271/2615

Test suite run success

444 tests passing in 31 suites.

Report generated by 🧪jest coverage report action from 6dd24534cc73bec036bfc3f1569d54630cedfa77