Four extraction cases and one pipeline case, each asserting a distinct claim so a
regression names what it broke:
nix_attrset_scope_disambiguates_leaf_names
two attrsets each holding `dup` produce two definitions with distinct QNs.
Unqualified they shared one QN and the second was discarded.
nix_dotted_attrpath_qualifies_like_nested
`wrap.deep.fn = …` and `wrap = { deep = { fn = …; }; }` produce the SAME
QN. This is the equality that makes attrpath qualification a correctness
fix rather than a preference — the two are the same expression.
nix_quoted_attr_name_strips_quotes
`"kebab-case"` is named kebab-case, and asserts the quoted form is absent
rather than merely that the bare form is present.
nix_interpolated_attr_mints_no_def
`"${dynamic}" = …` mints nothing, and the sibling binding still does — so
the test cannot pass by extracting nothing at all.
pipeline_nix_scoped_binding_calls_resolve (tests/test_pipeline.c)
a call inside a scoped binding reaches its target through the store, for
both routes into a qualified name: an enclosing attrset and a dotted
attrpath.
The pipeline case has to live at that level. Definition QNs and call-scope QNs
come from two separate functions, and if they disagree the edge is dropped at
write with no error — every extraction-level assertion still passes while the
graph quietly loses edges. Only the store shows it.
Adds has_def_qn alongside the existing has_def. find_def_by_name returns the
first match by NAME and so cannot tell two same-named definitions in different
scopes apart, which is exactly what these tests exist to separate.
Extraction and pipeline suites: 491 passed, 0 failed.
Signed-off-by: Jason Bowman <jason@json64.dev>