alef 0.84.2

//! Regression coverage for the element accessor a wildcard (`container[].field`) fixture path
//! expands to in the Elixir e2e generator.
//!
//! Split into its own file rather than added to `elixir/assertions.rs`: that file sits at its
//! recorded ceiling in `tests/file_size_baseline.txt`, so new coverage goes into a fresh module
//! instead of growing it (see `file-modularization` in CLAUDE.md). ~keep
//!
//! The defect: the wildcard branch splits `records[].kind` into the container `records` and the
//! element half `kind`, then built the `Enum.any?/2` closure body with `FieldResolver::accessor`,
//! which anchors a path against the call's RESULT type. `kind` is not declared on the root, so the
//! envelope rescue prefixed it back to `records[0].kind` and the closure body came out as
//! `Enum.at(e.records, 0).kind` — the container path applied a second time against a binding that
//! is already an element.

use std::collections::{HashMap, HashSet};

use super::assertions::render_assertion;
use crate::e2e::codegen::wildcard_element_fixture::{
    WILDCARD_FIELD, assert_container_accessor_appears_once, assert_element_relative, contains_assertion,
    envelope_resolver, report_resolver,
};
use crate::e2e::field_access::FieldResolver;

const CONTAINER_ACCESSOR: &str = ".records";

fn render(resolver: &FieldResolver) -> String {
    let mut out = String::new();
    render_assertion(
        &mut out,
        &contains_assertion(WILDCARD_FIELD),
        "result",
        resolver,
        "Sample",
        &HashSet::new(),
        &HashMap::new(),
        false,
        false,
        false,
        false,
        false,
    );
    out
}

#[test]
fn wildcard_closure_body_is_relative_to_the_element_binding() {
    let rendered = render(&report_resolver("elixir"));

    assert_element_relative(&rendered, "to_string(e.kind)", "Enum.at(e.records, 0)");
    assert_container_accessor_appears_once(&rendered, CONTAINER_ACCESSOR);
}

/// The container half must keep resolving against the result variable — the fix must not turn
/// into "never anchor", which would still satisfy the assertion above.
#[test]
fn wildcard_container_stays_anchored_to_the_result_variable() {
    let rendered = render(&report_resolver("elixir"));

    assert!(
        rendered.contains("Enum.any?((result.records || []), fn e ->"),
        "container half must quantify over the result variable's own field, got: {rendered}"
    );
}

/// The stronger container control: on an envelope root the container is reachable only THROUGH
/// the `result_fields` projection, so dropping the anchoring from `accessor` — rather than only
/// from the element half — renders `result.records`, a member the envelope does not declare.
#[test]
fn wildcard_container_keeps_its_envelope_projection() {
    let rendered = render(&envelope_resolver("elixir"));

    assert!(
        rendered.contains("Enum.any?((Enum.at(result.results, 0).records || []), fn e ->"),
        "container half must keep the result-anchored envelope projection, got: {rendered}"
    );
    assert_container_accessor_appears_once(&rendered, CONTAINER_ACCESSOR);
}