Function test_extract_js_this_assigned_methods

tests/test_extract.py:751–780

`this.X = () => {}` / `this.X = function(){}` in a constructor-style function body must be captured as methods owned by that function. This is the dominant pattern in pre-class JS (DAOs, route handlers): the methods live in the function body, which is otherwise only walked for calls

(tmp_path)

def test_extract_js_this_assigned_methods(tmp_path):
    """`this.X = () => {}` / `this.X = function(){}` in a constructor-style
    function body must be captured as methods owned by that function.

    This is the dominant pattern in pre-class JS (DAOs, route handlers): the
    methods live in the function body, which is otherwise only walked for
    calls, so before this they were entirely invisible as symbols.
    """
    from graphify.extract import extract_js
    f = tmp_path / "dao.js"
    f.write_text(
        "function UserDAO(db) {\n"
        "  this.addUser = (name) => { return name; };\n"
        "  this.getUser = function(id) { return id; };\n"
        "}\n"
    )
    result = extract_js(f)
    by_label = {n["label"]: n for n in result["nodes"]}
    assert "UserDAO()" in by_label
    assert ".addUser()" in by_label
    assert ".getUser()" in by_label
    # The methods are owned by UserDAO via a `method` edge.
    owner = by_label["UserDAO()"]["id"]
    method_edges = {
        (e["source"], by_label_by_id(result, e["target"]))
        for e in result["edges"]
        if e["relation"] == "method"
    }
    assert (owner, ".addUser()") in method_edges
    assert (owner, ".getUser()") in method_edges


def test_extract_js_commonjs_exports_assignment(tmp_path):