Intent of cssHelpers.ts ×12

All 9 exact tests in this concept. Every test is marked by where it enters the hierarchy.

mocha:v1|namespace=vscode@05c208e9e28d8c1c723fa08f85e2b7a96092e8e5|file=vs/ 9 tests
- platform/ 9 tests
  - browserView/ 9 tests
    
    test/ 9 tests
    
    common/ 9 tests
    
    mocha:v1|namespace=vscode@05c208e9e28d8c1c723fa08f85e2b7a96092e8e5|file=vs/platform/browserView/test/common/cssHelpers.test|title=formatAuthorStyles collects var references from rules|occurrence=1 Inherited cssHelpers.ts ×1
    
    mocha:v1|namespace=vscode@05c208e9e28d8c1c723fa08f85e2b7a96092e8e5|file=vs/platform/browserView/test/common/cssHelpers.test|title=formatAuthorStyles filters inherited rules to inheritable properties only|occurrence=1 Inherited cssHelpers.ts ×5
    
    mocha:v1|namespace=vscode@05c208e9e28d8c1c723fa08f85e2b7a96092e8e5|file=vs/platform/browserView/test/common/cssHelpers.test|title=formatAuthorStyles includes direct author rules and skips user-agent|occurrence=1 Inherited cssHelpers.ts ×1
    
    mocha:v1|namespace=vscode@05c208e9e28d8c1c723fa08f85e2b7a96092e8e5|file=vs/platform/browserView/test/common/cssHelpers.test|title=formatAuthorStyles includes pseudo-element styles|occurrence=1 Inherited cssHelpers.ts ×2
    
    mocha:v1|namespace=vscode@05c208e9e28d8c1c723fa08f85e2b7a96092e8e5|file=vs/platform/browserView/test/common/cssHelpers.test|title=formatAuthorStyles skips user-agent pseudo-element rules|occurrence=1 Inherited cssHelpers.ts ×1
    
    mocha:v1|namespace=vscode@05c208e9e28d8c1c723fa08f85e2b7a96092e8e5|file=vs/platform/browserView/test/common/cssHelpers.test|title=formatAuthorStyles tracks author property names from cssProperties longhands|occurrence=1 Introduced here
    
    mocha:v1|namespace=vscode@05c208e9e28d8c1c723fa08f85e2b7a96092e8e5|file=vs/platform/browserView/test/common/cssHelpers.test|title=formatAuthorStyles tracks user-agent property names from direct rules|occurrence=1 Inherited cssHelpers.ts ×1
    
    mocha:v1|namespace=vscode@05c208e9e28d8c1c723fa08f85e2b7a96092e8e5|file=vs/platform/browserView/test/common/cssHelpers.test|title=formatAuthorStyles tracks user-agent property names from inherited rules (inheritable only)|occurrence=1 Inherited cssHelpers.ts ×1
    
    mocha:v1|namespace=vscode@05c208e9e28d8c1c723fa08f85e2b7a96092e8e5|file=vs/platform/browserView/test/common/cssHelpers.test|title=formatAuthorStyles tracks user-agent property names from pseudo-element rules|occurrence=1 Inherited cssHelpers.ts ×1