Struct CapturingBackend 

pub struct CapturingBackend { /* private fields */ }

Backend that records every operation as a Token without writing anywhere.

Useful for verifying crate::JsonEmitter behavior without depending on a real JSON serializer.

Implementations

impl CapturingBackend

pub fn new() -> Self

Create a new empty CapturingBackend.

pub fn tokens(&self) -> &[Token]

Borrow the recorded tokens without consuming the backend.

Trait Implementations

impl Debug for CapturingBackend

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for CapturingBackend

fn default() -> CapturingBackend

Returns the “default value” for a type.

impl JsonBackend for CapturingBackend

type Output = Vec<Token>

Type returned by JsonBackend::finish.

fn begin_array(&mut self) -> Result<()>

Begin a JSON array (writes [).

fn begin_object(&mut self) -> Result<()>

Begin a JSON object (writes {).

fn end_array(&mut self) -> Result<()>

End the current JSON array (writes ]).

fn end_object(&mut self) -> Result<()>

End the current JSON object (writes }).

fn finish(self) -> Result<Vec<Token>>

Finish writing and return the backend’s output.

fn write_bool(&mut self, b: bool) -> Result<()>

Write a boolean value.

fn write_name(&mut self, name: &str) -> Result<()>

Write an object key.

fn write_null(&mut self) -> Result<()>

Write a null value.

fn write_number(&mut self, n: u32) -> Result<()>

Write a u32 numeric value.

fn write_string(&mut self, s: &str) -> Result<()>

Write a string value.