AssertNoDiff

Asserts the equality of JavaScript strings and objects with human-friendly, Bash-colored diffs as error messages.

This library provides the JavaScript string and object diff methods of the popular diff library as assertions. The exceptions thrown by the assertions highlight the differences of the actual and expected values with human-friendly Bash-colored messages. This is useful for verifying the equality of larger strings or data structures in tests.

import * as assertNoDiff from "assert-no-diff"

// assert no differences between two JavaScript objects
assertNoDiff.json(actualJson, expectedJson)

// compare strings and highlight the differences character-by-character
assertNoDiff.chars(actualString, expectedString)

// compare strings and highlight the mismatching words, whitespace-sensitive
assertNoDiff.wordsWithSpace(actualString, expectedString)

// compare strings and highlight the mismatching lines, ignoring whitespace around them
assertNoDiff.trimmedLines(actualString, expectedString)

You can provide a custom error message as an optional third parameter.