io.spring.gradle.testkit.junit.rules.TestKit.java Source code

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Here is the source code for io.spring.gradle.testkit.junit.rules.TestKit.java

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/*
 * Copyright 2002-2017 the original author or authors.
 *
 * 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
 *
 * https://www.apache.org/licenses/LICENSE-2.0
 *
 * 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.
 */
package io.spring.gradle.testkit.junit.rules;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.net.URISyntaxException;
import java.net.URL;
import java.nio.file.Paths;
import java.util.Enumeration;

import org.apache.commons.io.FileUtils;
import org.gradle.testkit.runner.GradleRunner;
import org.junit.rules.TemporaryFolder;
import org.junit.rules.TestRule;
import org.junit.runner.Description;
import org.junit.runners.model.Statement;

public class TestKit implements TestRule {
    final TemporaryFolder testProjectDir = new TemporaryFolder();
    File buildDir;

    @Override
    public Statement apply(Statement base, Description description) {
        Statement wrapped = new Statement() {

            @Override
            public void evaluate() throws Throwable {
                try {
                    buildDir = testProjectDir.newFolder();
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
                base.evaluate();
            }
        };
        return testProjectDir.apply(wrapped, description);
    }

    public File getRootDir() {
        return buildDir;
    }

    public GradleRunner withProjectDir(File projectDir) throws IOException {
        FileUtils.copyDirectory(projectDir, buildDir);
        return GradleRunner.create().withProjectDir(buildDir).withPluginClasspath();
    }

    public GradleRunner withProjectResource(String projectResourceName) throws IOException, URISyntaxException {
        ClassLoader classLoader = getClass().getClassLoader();
        Enumeration<URL> resources = classLoader.getResources(projectResourceName);
        if (!resources.hasMoreElements()) {
            throw new IOException("Cannot find resource " + projectResourceName + " with " + classLoader);
        }
        URL resourceUrl = resources.nextElement();
        File projectDir = Paths.get(resourceUrl.toURI()).toFile();
        return withProjectDir(projectDir);
    }
}