This library provides AssertJ assertions for diffing files. If a test fails, it generates an HTML report.
It uses google-diff-match-patch to do the hard stuff.

The project requires at least JDK 7.

Usage

Adding assertj-diff to your project

<repositories>
    <repository>
        <snapshots>
            <enabled>false</enabled>
        </snapshots>
        <id>central</id>
        <name>bintray</name>
        <url>http://jcenter.bintray.com</url>
    </repository>
</repositories>

<dependency>
    <groupId>io.github.robwin</groupId>
    <artifactId>assertj-diff</artifactId>
    <version>0.1.1</version>
</dependency>

repositories {
    jcenter()
}

compile "io.github.robwin:assertj-diff:0.1.1"

Using assertj-diff

Path actualFile = Paths.get(DiffAssertTest.class.getResource("/actualFile.txt").toURI());
Path expectedFile = Paths.get(DiffAssertTest.class.getResource("/expectedFile.txt").toURI());
Path reportPath = Paths.get("build/diff-result.txt");

DiffAssertions.assertThat(actualFilePath).isEqualTo(expectedFilePath, reportPath)

Report Example

Copyright 2016 Robert Winkler

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.