com.facebook.buck.testutil.integration.ZipInspector.java Source code

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Here is the source code for com.facebook.buck.testutil.integration.ZipInspector.java

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/*
 * Copyright 2014-present Facebook, Inc.
 *
 * 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 com.facebook.buck.testutil.integration;

import static org.hamcrest.Matchers.hasItem;
import static org.hamcrest.Matchers.not;
import static org.junit.Assert.assertThat;

import com.facebook.buck.io.MorePaths;
import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableSet;
import com.google.common.io.CharStreams;

import org.hamcrest.Matchers;

import java.io.IOException;
import java.io.InputStreamReader;
import java.nio.file.Path;
import java.util.Enumeration;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;

public class ZipInspector {

    private final Path zipFile;
    private final ImmutableSet<String> zipFileEntries;

    public ZipInspector(Path zip) throws IOException {
        this.zipFile = Preconditions.checkNotNull(zip);

        final ImmutableSet.Builder<String> builder = ImmutableSet.builder();
        try (ZipFile zipFile = new ZipFile(zip.toFile())) {
            Enumeration<? extends ZipEntry> entries = zipFile.entries();
            while (entries.hasMoreElements()) {
                builder.add(entries.nextElement().getName());
            }
        }
        this.zipFileEntries = builder.build();
    }

    public void assertFileExists(String pathRelativeToRoot) {
        assertThat(zipFileEntries, hasItem(pathRelativeToRoot));
    }

    public void assertFileDoesNotExist(String pathRelativeToRoot) {
        assertThat(zipFileEntries, not(hasItem((pathRelativeToRoot))));
    }

    public void assertFilesDoNotExist(String... pathsRelativeToRoot) {
        for (String path : pathsRelativeToRoot) {
            assertFileDoesNotExist(path);
        }
    }

    public void assertFileContents(String pathRelativeToRoot, String expected) throws IOException {
        try (ZipFile zipFile = new ZipFile(this.zipFile.toFile())) {
            ZipEntry entry = zipFile.getEntry(pathRelativeToRoot);
            assertThat(CharStreams.toString(new InputStreamReader(zipFile.getInputStream(entry))),
                    Matchers.equalTo(expected));
        }
    }

    public void assertFileContents(Path pathRelativeToRoot, String expected) throws IOException {
        assertFileContents(MorePaths.pathWithUnixSeparators(pathRelativeToRoot), expected);
    }

    public ImmutableSet<String> getZipFileEntries() {
        return zipFileEntries;
    }

    public long getCrc(String pathRelativeToRoot) throws IOException {
        try (ZipFile zipFile = new ZipFile(this.zipFile.toFile())) {
            ZipEntry entry = zipFile.getEntry(pathRelativeToRoot);
            long crc = entry.getCrc();
            Preconditions.checkState(crc != -1, "Error accessing crc for entry: %s", pathRelativeToRoot);
            return crc;
        }
    }

    public long getSize(String pathRelativeToRoot) throws IOException {
        try (ZipFile zipFile = new ZipFile(this.zipFile.toFile())) {
            ZipEntry entry = zipFile.getEntry(pathRelativeToRoot);
            long size = entry.getSize();
            Preconditions.checkState(size != -1, "Error accessing size for entry: %s", pathRelativeToRoot);
            return size;
        }
    }
}