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AbstractHmTextBody.java
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AbstractHmTextBody.java
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/**
* The MIT License (MIT)
*
* Copyright (c) 2014-2018 Yegor Bugayenko
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package org.takes.facets.hamcrest;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.charset.Charset;
import org.hamcrest.Description;
import org.hamcrest.Matcher;
import org.hamcrest.TypeSafeMatcher;
/**
* Text body matcher.
*
* <p>This "matcher" tests given item body, assuming that it has text content.
* <p>The class is immutable and thread-safe.
*
* @author Izbassar Tolegen (t.izbassar@gmail.com)
* @version $Id$
* @param <T> Item type. Should be able to return own body
* @since 2.0
*/
public abstract class AbstractHmTextBody<T> extends TypeSafeMatcher<T> {
/**
* Body matcher.
*/
private final Matcher<String> body;
/**
* Charset of the text.
*/
private final Charset charset;
/**
* Ctor.
* @param body Body matcher.
* @param charset Charset of the text.
*/
public AbstractHmTextBody(final Matcher<String> body,
final Charset charset) {
super();
this.body = body;
this.charset = charset;
}
@Override
public final void describeTo(final Description description) {
description.appendText("body: ").appendDescriptionOf(this.body);
}
@Override
protected final boolean matchesSafely(final T item) {
try {
return this.body.matches(this.text(item));
} catch (final IOException ex) {
throw new IllegalStateException(ex);
}
}
@Override
protected final void describeMismatchSafely(final T item, final
Description description) {
try {
description.appendText("body was: ").appendText(this.text(item));
} catch (final IOException ex) {
throw new IllegalStateException(ex);
}
}
/**
* Item's body.
* @param item Item to retrieve body from
* @return InputStream of body
* @throws IOException If some problem inside
*/
protected abstract InputStream itemBody(final T item) throws IOException;
/**
* Text from item.
* @param item Item
* @return Text contents of item
* @throws IOException If some problem inside
*/
@SuppressWarnings("PMD.AssignmentInOperand")
private String text(final T item) throws IOException {
final String text;
try (
final InputStream input = this.itemBody(item);
final ByteArrayOutputStream output = new ByteArrayOutputStream()
) {
// @checkstyle MagicNumberCheck (1 line)
final byte[] buffer = new byte[1024];
int len;
while ((len = input.read(buffer, 0, buffer.length)) != -1) {
output.write(buffer, 0, len);
}
output.flush();
text = new String(output.toByteArray(), this.charset);
}
return text;
}
}