I'm a little confused about the location of the test files, `FirLightTreeDiagnosticsTestGenerated` i...

# compiler

[Icyrockton]

I'm a little confused about the location of the test files, FirLightTreeDiagnosticsTestGenerated is generated from compiler/fir/analysis-tests/testData , while FirLightTreeOldFrontendDiagnosticsTestGenerated is generated from compiler/testData/diagnostics/.
Is the former(i.e. FirLightTreeDiagnosticsTestGenerated ) specifically for K2 frontend and the latter for old frontend test files? If I want to learn the type inference processing, should I focus on the test files under compiler/testData/diagnostics/, which contains more kinds of test files?

[dmitriy.novozhilov]

Tests in compiler/testData/diagnostics/ run both for K1 and K2
Tests in compiler/fir/analysis-tests/testData run only for K2

Is the former(i.e. FirLightTreeDiagnosticsTestGenerated) specifically for K2 frontend and the latter for old frontend test files?

Yes
FirLightTreeOldFrontendDiagnosticsTestGenerated is just a name for K2 tests over testdata which was originally used for K1
Semantically FirLightTreeOldFrontendDiagnosticsTestGenerated and FirLightTreeDiagnosticsTestGenerated do the same thing