Function ranges_are_nested

src/selection_range.rs:1056–1083

()

    #[test]
    fn ranges_are_nested() {
        let content = r#"<?php
function test() {
    $x = [1, 2, 3];
}
"#;
        // Cursor on `2` in the array (line 2, char 13).
        let results = selection_ranges(content, &[Position::new(2, 13)]);
        assert_eq!(results.len(), 1);
        let ranges = flatten(&results[0]);

        // Verify that each range is contained within or equal to its parent.
        for window in ranges.windows(2) {
            let inner = &window[0];
            let outer = &window[1];
            assert!(
                (inner.start.line > outer.start.line
                    || (inner.start.line == outer.start.line
                        && inner.start.character >= outer.start.character))
                    && (inner.end.line < outer.end.line
                        || (inner.end.line == outer.end.line
                            && inner.end.character <= outer.end.character)),
                "Inner range {:?} should be contained within outer range {:?}",
                inner,
                outer,
            );
        }
    }

    /// Helper: assert every range in the chain is contained within its parent.
    fn assert_nested(ranges: &[Range]) {