io.ingenieux.lambada.invoker.InvokerTestBase.java Source code

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Here is the source code for io.ingenieux.lambada.invoker.InvokerTestBase.java

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/*
 * Copyright (c) 2016 ingenieux Labs
 *
 * 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 io.ingenieux.lambada.invoker;

import com.amazonaws.services.lambda.runtime.Context;

import org.apache.commons.io.IOUtils;
import org.hamcrest.CoreMatchers;
import org.hamcrest.MatcherAssert;
import org.junit.After;
import org.junit.Before;
import org.mockito.Mockito;

import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.lang.reflect.Method;

import io.ingenieux.lambada.invoker.fixtures.Fixture;
import io.ingenieux.lambada.invoker.fixtures.LoggerFixture;
import io.ingenieux.lambada.invoker.fixtures.Notifier;

import static org.hamcrest.core.Is.is;
import static org.hamcrest.core.IsEqual.equalTo;
import static org.junit.Assert.assertThat;

public class InvokerTestBase {

    Object instance;

    Invoker invoker;

    Context context;

    InputStream inputStream;

    ByteArrayOutputStream outputStream;

    LoggerFixture lambdaLogger;

    Method m;

    @Before
    public void setUp() {
        this.instance = new Fixture();
        this.invoker = new Invoker();
        this.inputStream = Mockito.mock(InputStream.class);
        this.outputStream = new ByteArrayOutputStream();
        this.context = Mockito.mock(Context.class);

        this.lambdaLogger = new LoggerFixture();

        Mockito.when(this.context.getLogger()).thenReturn(this.lambdaLogger);
    }

    @After
    public void tearDown() {
        Notifier.clear();
    }

    public void givenMethod(String methodName) {
        m = getMethod(methodName);

        invoker.setUserHandler(UserHandlerFactory.findUserFactory(instance, m));
    }

    public void whenInvoked() throws Exception {
        invoker.invoke(inputStream, outputStream, context);
    }

    public void thenMustSilentlyContain(String message) {
        MatcherAssert.assertThat("Must contain '" + message + "'", Notifier.getMessages(),
                CoreMatchers.hasItem(message));
    }

    public void thenMustContain(String message) {
        MatcherAssert.assertThat("Must have called log with '" + message + "'", lambdaLogger.getMessageList(),
                CoreMatchers.hasItem(message));
    }

    public Method getMethod(String methodName) {
        for (Method m : this.instance.getClass().getDeclaredMethods()) {
            if (m.getName().equals(methodName)) {
                return m;
            }
        }

        throw new IllegalStateException("Method not found: " + methodName);
    }

    public void withInput(String string) throws Exception {
        this.inputStream = IOUtils.toInputStream(string);
    }

    public void thenMustHaveWrittenOnOutputStream(String str) throws Exception {
        assertThat(outputStream.toString("utf-8"), is(equalTo(str)));
    }
}