Crate similar_asserts

similar-asserts is a crate that enhances the default assertion experience by using similar for diffing. On failed assertions it renders out a colorized diff to the terminal.

It comes with a handful of macros to replace std::assert_eq! with:

• assert_eq!: diffs Debug on assertion failure.
• assert_serde_eq!: diffs Serialize on assertion failure.
• assert_str_eq!: compares both sides to strings and diffs those on failure.

Usage

use similar_asserts::assert_eq;
assert_eq!((1..3).collect::<Vec<_>>(), vec![1, 2]);

Optionally the assertion macros also let you “name” the left and right side which will produce slightly more explicit output:

use similar_asserts::assert_eq;
assert_eq!(expected: vec![1, 2], actual: (1..3).collect::<Vec<_>>());

Feature Flags

• unicode enable improved character matching (enabled by default)
• serde turns on support for serde.

Macros

assert_eq

Asserts that two expressions are equal to each other (using PartialEq).

assert_serde_eq

Asserts that two expressions are equal to each other (using PartialEq).

assert_str_eq

Asserts that two stringified expressions are equal to each other (using PartialEq).