Adding `expect_json` library as a dependency

Run this command in a terminal, in your project's directory:

cargo add --dev expect-json

to add it a dev dependency (if it's used only in tests, not in the final product). To add it as a regular run-time dependency, run:

cargo add expect-json

To add it manually, edit your project's Cargo.toml file and add to the [dependencies] section:

expect-json = "1.9.0"

The expect_json library will be automatically available globally. Read the expect_json library documentation.

Back to the crate overview.

Readme

Expect Json

A testing library for comparing Json payloads,
and declaring you get what you expect

This is still a work in progress. Come back later when more is done!

Declare your expectations in your Json:

use expect_json::expect;

server
    .post(&"/user")
    .await
    .assert_json(&json!({
        "name": "Joe",
        "age": expect.in_range(20..=30),
        "timestamp": expect::iso_date_time(),
        "ids": expect.contains(&[1, 2, 3, 4]),
        "comments": [
            {
                "timestamp": expect::iso_date_time().greater_than("2025-01-01"),
                "content": "Hello!"
            }
        ]
    }));

Supports

expect.contains("a string")
expect.contains([1, "2", 3.3, true, false, {}])

Adding expect_json library as a dependency

Adding `expect_json` library as a dependency