Function update_test

cranelift/filetests/src/subtest.rs:199–234

(output: &[&str], context: &Context)

}

fn update_test(output: &[&str], context: &Context) -> Result<()> {
    context
        .file_update
        .update_at(&context.details.location, |new_test, old_test| {
            // blank newline after the function
            new_test.push_str("\n");

            // Splice in the test output
            for output in output {
                new_test.push(';');
                if !output.is_empty() {
                    new_test.push(' ');
                    new_test.push_str(output);
                }
                new_test.push_str("\n");
            }

            // blank newline after test assertion
            new_test.push_str("\n");

            // Drop all remaining commented lines (presumably the old test expectation),
            // but after we hit a real line then we push all remaining lines.
            let mut in_next_function = false;
            for line in old_test {
                if !in_next_function
                    && (line.trim().is_empty()
                        || (line.starts_with(";") && !line.starts_with(";;")))
                {
                    continue;
                }
                in_next_function = true;
                new_test.push_str(line);
                new_test.push_str("\n");
            }
        })
}