br.com.objectos.testing.MatcherToStringEqualToResource.java Source code

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Here is the source code for br.com.objectos.testing.MatcherToStringEqualToResource.java

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/*
 * Copyright 2014 Objectos, Fbrica de Software LTDA.
 *
 * 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 br.com.objectos.testing;

import java.net.URL;
import java.util.List;

import com.google.common.base.Charsets;
import com.google.common.base.Splitter;
import com.google.common.base.StandardSystemProperty;
import com.google.common.base.Throwables;
import com.google.common.io.Resources;

import org.hamcrest.Description;
import org.hamcrest.TypeSafeMatcher;

/**
 * @author marcio.endo@objectos.com.br (Marcio Endo)
 */
class MatcherToStringEqualToResource<T> extends TypeSafeMatcher<T> {

    private final String resourceName;

    private LineAssert lineAssert;

    public MatcherToStringEqualToResource(String resourceName) {
        this.resourceName = resourceName;
    }

    @Override
    public void describeTo(Description description) {
        String msg = String.format("contents equalTo resource at '%s'", resourceName);
        description.appendText(msg);
    }

    @Override
    protected void describeMismatchSafely(T item, Description mismatchDescription) {
        mismatchDescription.appendDescriptionOf(lineAssert);
    }

    @Override
    protected boolean matchesSafely(T item) {
        try {
            List<String> actualLines = readLines(item);
            URL resource = Resources.getResource(item.getClass(), resourceName);
            List<String> expectedLines = Resources.readLines(resource, Charsets.UTF_8);
            lineAssert = LineAssert.get(actualLines, expectedLines);
            return lineAssert.valid();
        } catch (Exception e) {
            throw Throwables.propagate(e);
        }
    }

    List<String> readLines(T object) throws Exception {
        String string = object != null ? object.toString() : "";
        return Splitter.on(StandardSystemProperty.LINE_SEPARATOR.value()).splitToList(string);
    }

}