Macro insta::assert_json_snapshot

macro_rules! assert_json_snapshot {
    ($value:expr, @$snapshot:literal) => { ... };
    ($value:expr, {$($k:expr => $v:expr),*$(,)?}, @$snapshot:literal) => { ... };
    ($value:expr, {$($k:expr => $v:expr),*$(,)?}) => { ... };
    ($name:expr, $value:expr) => { ... };
    ($name:expr, $value:expr, {$($k:expr => $v:expr),*$(,)?}) => { ... };
    ($value:expr) => { ... };
}

Available on crate feature json only.

Asserts a Serialize snapshot in JSON format.

Feature: json

This works exactly like assert_yaml_snapshot! but serializes in JSON format. This is normally not recommended because it makes diffs less reliable, but it can be useful for certain specialized situations.

Example:

assert_json_snapshot!(vec![1, 2, 3]);

The third argument to the macro can be an object expression for redaction. It’s in the form { selector => replacement }. For more information about redactions refer to the redactions feature in the guide.

The snapshot name is optional but can be provided as first argument.