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gradle-scalatest

A plugin to enable the use of scalatest in a gradle Scala project.

Getting started

http://plugins.gradle.org/plugin/com.github.maiflai.scalatest

This replaces the existing test task actions with a scalatest implementation (see Other Frameworks below).

In addition to your testCompile dependency on scalatest, you also require a testRuntime dependency on pegdown in order to create the HTML report.

dependencies {
  testCompile 'org.scalatest:scalatest_2.13:3.2.0'
  testRuntime 'com.vladsch.flexmark:flexmark-all:0.35.10'
  // note that older versions of scalatest have a testRuntime dependency on pegdown to produce HTML reports.
}

Compatibility

This plugin aims to be compatible with the current version of Gradle. The table below indicates the minimum required version.

Parallel Testing

The default behaviour is to use as many parallel threads as you have available processors.

Test tasks are modified at the time that you apply the plugin (as otherwise they would default to single-threaded).

To disable this, you should configure your test tasks accordingly.

test {
    maxParallelForks = 1
}

Tags

Scalatest provides support for filtering tests by tagging. We cannot use the PatternSet provided by the Test task because it applies this filter to test files internally.

We therefore provide an extension named tags to Test tasks.

test {
    tags {
        exclude 'org.scalatest.tags.Slow'
    }
}

task slowTest(type: Test) {
    tags {
        include 'org.scalatest.tags.Slow'
    }
}

Suites

Suites are supported with another extension to the Test task.

task userStories(type: Test) {
    suite 'com.example.UserStories'
    // suites 'a.Spec', 'b.Spec', 'etc'
}

Filtering

Scalatest provides a simplified wildcard syntax for selecting tests. We directly map Gradle test filters to this form.

test {
    filter {
        includeTestsMatching 'MyTest'
    }
}

This can also be supplied on the command line:

./gradlew test --tests MyTest

ConfigMap

Additional configuration can be passed to Scalatest using the config map

test {
    config 'db.name', 'testdb'
}

test {
    configMap([
        'db.name': 'testdb'
        'server': '192.168.1.188'
        ])
}

Custom Reporters

test {
    reporter 'my.Reporter'
}

Other Frameworks

The default behaviour is to replace all Test tasks with a scalatest implementation.

This may not be appropriate if you are migrating an existing project to scalatest.

The com.github.maiflai.gradle-scalatest.mode property may be configured to support the following behaviour:

It's probably easiest to set this in a gradle.properties file at the root of your project.

com.github.maiflai.gradle-scalatest.mode = append

If you then want to use scalatest to run other Test tasks, you can instruct this plugin to configure those tasks.

task myTest(dependsOn: testClasses, type: Test, group: 'verification') {
    com.github.maiflai.ScalaTestPlugin.configure(it)
    tags {
        include 'com.example.tags.MyTag'
    }
}