CucumberTestRunner.java

package com.neoranga55.cleanguitestarchitecture.cucumber.runner;

import android.os.Bundle;

import com.neoranga55.cleanguitestarchitecture.BuildConfig;

import cucumber.api.android.CucumberInstrumentationCore;

/**
 * Used in build.gradle/testInstrumentationRunner to run Cucumber tests
 * 'testInstrumentationRunner' variable in build.gradle has to point to this package
 * This class must be in a different package than the glue code
 * (this class is in '...cucumber.runner' and glue is in '...cucumber.steps')
 */
public class CucumberTestRunner extends android.support.test.runner.AndroidJUnitRunner {

    public static final String TAG = CucumberTestRunner.class.getSimpleName();
    /**
     * This is the item Cucumber uses to identify the tags parameter, see method
     * cucumber-android-1.2.2.jar\cucumber\runtime\android\Arguments.class @ getCucumberOptionsString()
     */
    private static final String CUCUMBER_TAGS_KEY = "tags";
    private final CucumberInstrumentationCore instrumentationCore = new CucumberInstrumentationCore(this);

    @Override
    public void onCreate(final Bundle bundle) {
        super.onCreate(bundle);
        // Read tags passed as parameters and overwrite @CucumberOptions tags inside CucumberTestCase.java
        final String tags = BuildConfig.TEST_TAGS;
        if (!tags.isEmpty()) {
            // Reformat tags list to separate items with '--' as expected by Cucumber library, see method
            // cucumber-android-1.2.2.jar\cucumber\runtime\android\Arguments.class @ appendOption()
            bundle.putString(CUCUMBER_TAGS_KEY, tags.replaceAll(",", "--").replaceAll("\\s",""));
        }
        instrumentationCore.create(bundle);
    }

    @Override
    public void onStart() {
        waitForIdleSync();
        instrumentationCore.start();
    }
}