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HmHeader.java
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HmHeader.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.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import org.hamcrest.Description;
import org.hamcrest.Matcher;
import org.hamcrest.Matchers;
import org.hamcrest.TypeSafeMatcher;
import org.takes.Head;
/**
* Header Matcher.
*
* <p>This "matcher" tests given item headers.
* <p>The class is immutable and thread-safe.
*
* @param <T> Item type. Should be able to return own headers
* @since 0.31.2
*/
public final class HmHeader<T extends Head> extends TypeSafeMatcher<T> {
/**
* Values string used in description of mismatches.
*/
private static final String VALUES_STR = " -> values: ";
/**
* Header matcher.
*/
private final Matcher<String> header;
/**
* Value matcher.
*/
private final Matcher<Iterable<String>> value;
/**
* Mismatched header values.
*/
private Collection<String> failed;
/**
* Ctor.
* @param hdrm Header matcher
* @param vlm Value matcher
*/
public HmHeader(final Matcher<String> hdrm,
final Matcher<Iterable<String>> vlm) {
super();
this.header = hdrm;
this.value = vlm;
}
/**
* Ctor.
* @param hdr Header name
* @param vlm Value matcher
*/
public HmHeader(final String hdr,
final Matcher<Iterable<String>> vlm) {
this(Matchers.equalToIgnoringCase(hdr), vlm);
}
/**
* Ctor.
* @param hdr Header name
* @param val Header value
*/
public HmHeader(final String hdr, final String val) {
this(
Matchers.equalToIgnoringCase(hdr),
Matchers.hasItems(val)
);
}
@Override
public void describeTo(final Description description) {
description.appendText("header: ")
.appendDescriptionOf(this.header)
.appendText(HmHeader.VALUES_STR)
.appendDescriptionOf(this.value);
}
@Override
public boolean matchesSafely(final T item) {
try {
final Iterator<String> headers = HmHeader.headers(item).iterator();
final Collection<String> values = new ArrayList<>(0);
while (headers.hasNext()) {
final String[] parts = HmHeader.split(headers.next());
if (this.header.matches(parts[0].trim())) {
values.add(parts[1].trim());
}
}
final boolean result = this.value.matches(values);
if (!result) {
this.failed = values;
}
return result;
} catch (final IOException ex) {
throw new IllegalStateException(ex);
}
}
@Override
public void describeMismatchSafely(final T item,
final Description description) {
description.appendText("header was: ")
.appendDescriptionOf(this.header)
.appendText(HmHeader.VALUES_STR)
.appendValue(this.failed);
}
/**
* Returns item's headers.
* @param item To extract headers from
* @return Header lines
* @throws IOException If something goes wrong
* @checkstyle NonStaticMethodCheck (2 lines)
*/
private static Iterable<String> headers(final Head item) throws
IOException {
return item.head();
}
/**
* Splits the given header to [name, value] array.
* @param header Header
* @return Array in which the first element is header name,
* the second is header value
*/
private static String[] split(final String header) {
return header.split(":", 2);
}
}