Macro assert_eq_selected

macro_rules! assert_eq_selected {
    ($actual:expr, $expect:expr, $($field:ident),+) => { ... };
}

Asserts that specific fields of two values are equal.

The fields listed in the macro are compared for equality.

This allows you to focus on comparing only the specified fields without needing to compare the entire struct or object.

Syntax

assert_eq_selected!(actual_value, expected_value, field1, field2, ...);

• actual_value: The actual value to compare.
• expected_value: The expected value to compare against.
• field1, field2, ...: The names of the fields to compare.

Example

If you want to compare two User instances only the id and name as follows:

assert_eq_selected!(user1, user2, name);

use derive_getters::Getters;
use selective_assertions::*;

#[derive(Debug, PartialEq, Getters)]
pub struct User {
    id: u32,
    name: String,
    age: u8,
}


let user1 = User { id: 1, name: String::from("Alice"), age: 7 };
let user2 = User { id: 1, name: String::from("Alice"), age: 8 };

// Compare user1 and user2, focusing only on the `id` and `name` fields
assert_eq_selected!(user1, user2, name); // This will pass

Panics

This macro will panic if the specified fields of the actual and expected values are not equal.

Note

The macro requires getter methods to set the fields to the expected values.

It is recommended to use derive_getters::Getters crate.