Function compare_or_save_testdata 

pub fn compare_or_save_testdata<T>(filename: &str, output: &T)
where
    T: Serialize + for<'a> Deserialize<'a> + PartialEq + Debug,

Compares or saves the execution output to a testdata file.

This utility helps maintain consistent test behavior by comparing execution results against known-good outputs stored in JSON files.

Arguments

• filename - The name of the testdata file, relative to tests/testdata/
• output - The execution output to compare or save

Panics

This function panics if:

• The output doesn’t match the expected testdata (when testdata file exists)
• There’s an error reading/writing files
• JSON serialization/deserialization fails

Note

Tests using this function require the serde feature to be enabled:

cargo test --features serde