com.sandornemeth.metrics.spring.autoconfigure.ReporterTestCaseBase.java Source code

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Here is the source code for com.sandornemeth.metrics.spring.autoconfigure.ReporterTestCaseBase.java

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/**
 * Copyright (C) 2015 Sandor Nemeth (sandor.nemeth.1986@gmail.com)
 *
 * 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
 *
 *         http://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 com.sandornemeth.metrics.spring.autoconfigure;

import com.sandornemeth.metrics.spring.autoconfigure.outputcaptor.OutputCaptor;

import com.codahale.metrics.jvm.MemoryUsageGaugeSet;

import org.junit.After;
import org.springframework.boot.test.EnvironmentTestUtils;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.Configuration;

import java.util.Set;

import static org.hamcrest.CoreMatchers.containsString;
import static org.junit.Assert.assertThat;

public abstract class ReporterTestCaseBase {

    protected AnnotationConfigApplicationContext context;

    abstract OutputCaptor getOutputCaptor();

    @After
    public void cleanUp() throws Exception {
        if (null != context) {
            context.close();
        }
    }

    protected void executeReporterTest(int waitInMillis, String... environment) throws Exception {
        OutputCaptor outputCaptor = getOutputCaptor();
        outputCaptor.start();
        load(TestConf.class, environment);
        Thread.sleep(waitInMillis);
        outputCaptor.close();
        String output = outputCaptor.get();
        verifyRegisteredJvmMetrics(output);
    }

    protected void verifyRegisteredJvmMetrics(String output) {
        Set<String> registeredMemoryUsageGaugeKeys = new MemoryUsageGaugeSet().getMetrics().keySet();
        registeredMemoryUsageGaugeKeys.forEach(k -> assertThat(output, containsString(k)));
    }

    protected void load(Class<?> config, String... environment) {
        this.context = doLoad(new Class<?>[] { config }, environment);
    }

    private AnnotationConfigApplicationContext doLoad(Class<?>[] configs, String... environment) {
        AnnotationConfigApplicationContext applicationContext = new AnnotationConfigApplicationContext();
        applicationContext.register(configs);
        applicationContext.register(MetricsAutoConfiguration.class);
        EnvironmentTestUtils.addEnvironment(applicationContext, environment);
        applicationContext.refresh();
        return applicationContext;
    }

    @Configuration
    protected static class TestConf {

    }
}