Android Studio 0.9.1 with Robolectric

README.md

README

Allows running Robolectric tests directly from the Android Studio.

Supported versions

This script works with com.android.tools.build:gradle:0.14.0 and Android Studio v0.9.1

Instructions

Robolectric setup

Add robolectric to your project as described here:
https://github.com/robolectric/deckard-gradle.
Complete all steps before "IntelliJ / Android Studio Support".

build.gradle

1. Place robolectric-iml.gradle near the build.gradle file.
2. Apply it after android plugin

Android Studio

Setup your default JUnit configuration:

EditConfigurations ... -> Defaults -> JUnit

1. Remove Make from Before launch section
2. Add new Before launch entry, Run external tool
3. Give it any name
4. Program: ./gradlew
5. Parameters: --daemon --offline testDebugClasses
6. Working directory: full-path-to-directory-of-gradlew-file
7. Apply everything
8. Restart Android Studio

Now you can run your robolectric tests from the IDE.

FAQ

Q: Could we launch gradle task, not external tool?
A: Yes, but in this case gradle task is run simultaneously with the tests (for some strange reason), which can cause some race conditions.

Q: Could we use macros instead of hardcoded project path?
A: Yes, but for me it broke after first build.

Credits

The script is based on this script. Many thanks, Nico!

build.gradle

// Place robolectric-iml.gradle near build.gradle

apply plugin: 'com.android.library'

apply from: 'robolectric-iml.gradle'

robolectric-iml.gradle

task prepareImlForTests() {
    def imlFile = file(project.name + ".iml")
    def TEST_CLASSES_PATH = 'file://$MODULE_DIR$/build/test-classes'

    // Will work on 3rd invocation only, but it's "beta than nothing"
    inputs.file(imlFile)
    outputs.file(imlFile)

    doLast {
        project.logger.info "Updating ${imlFile} for robolectric tests"

        try {
            Node parsedXml = new XmlParser().parse(imlFile)
            Node componentNode = parsedXml.component[1]
            Node outputTestNode = componentNode.'output-test'[0]
            def rewrite = false

            // Move SDK entry to the end of the node
            Node androidSdkEntry = componentNode.orderEntry.find { it.@type == "jdk" }
            if (androidSdkEntry != null) {
                componentNode.remove(androidSdkEntry)
                componentNode.append(androidSdkEntry)
                rewrite = true
            }

            // add 'output-test' property if not present
            if (outputTestNode == null) {
                new Node(componentNode, 'output-test', ['url': TEST_CLASSES_PATH])
            } else {
                if (outputTestNode.attributes['url'] != TEST_CLASSES_PATH) {
                    outputTestNode.attributes = ['url': TEST_CLASSES_PATH]
                    rewrite = true
                }
            }

            if (rewrite) {
                def writer = new StringWriter()
                new XmlNodePrinter(new PrintWriter(writer)).print(parsedXml)
                imlFile.text = writer.toString()
            }
        } catch (FileNotFoundException e) {
            // iml not found, common on command line only builds
        }
    }
}

// always do the addtest on prebuild
project.afterEvaluate {
    preBuild.dependsOn prepareImlForTests
}