google.registry.testing.FakeServletInputStream.java Source code

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Here is the source code for google.registry.testing.FakeServletInputStream.java

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// Copyright 2016 The Nomulus Authors. All Rights Reserved.
//
// 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 google.registry.testing;

import com.google.common.io.ByteSource;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import javax.servlet.ServletInputStream;

/**
 * Used to mock the return value of {@link javax.servlet.ServletRequest#getInputStream}.
 *
 * <p>Most servlets will call {@link javax.servlet.ServletRequest#getReader}, in which case you
 * can simply return a {@link java.io.StringReader} instance. But the getInputStream method is
 * not as simple to mock and requires an implementing class.
 */
public final class FakeServletInputStream extends ServletInputStream {

    private final InputStream input;

    public FakeServletInputStream(byte[] buf) {
        this.input = new ByteArrayInputStream(buf);
    }

    /**
     * Use a {@link ByteSource} as input for the servlet. Be sure to call {@link #close} after
     * your servlet runs so the resource opened via {@code bytes} gets closed.
     * @throws IOException
     */
    public FakeServletInputStream(ByteSource bytes) throws IOException {
        this.input = bytes.openStream();
    }

    @Override
    public int read() throws IOException {
        return input.read();
    }

    @Override
    public void close() throws IOException {
        input.close();
    }
}