DecodeReferenceOrigins collects reference origins, using previously parsed AST (via [ParseModuleConfiguration]), core schema of appropriate version (as obtained via [GetTerraformVersion]) and provider schemas ([PreloadEmbeddedSchema] or [ObtainSchema]).

DecodeReferenceTargets collects reference targets, using previously parsed AST (via [ParseModuleConfiguration]), core schema of appropriate version (as obtained via [GetTerraformVersion]) and provider schemas ([PreloadEmbeddedSchema] or [ObtainSchema]).

LoadTestMetadata loads data about the test in a version-independent way that enables us to decode the rest of the configuration, e.g.

ParseTestConfiguration parses the whole test configuration, i.e.

SchemaTestValidation does schema-based validation of test files (*.tftest.hcl), mock files (*.tfmock.hcl) and produces diagnostics associated with any "invalid" parts of code.