/*
 * Copyright 2016-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.jvm.java.autodeps;

import static org.junit.Assert.assertEquals;

import com.facebook.buck.util.ObjectMappers;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSet;
import java.io.IOException;
import java.io.StringWriter;
import org.junit.Test;

public class SymbolsTest {

  @Test
  public void jsonSerializatonAndDeserialization() throws IOException {
    // Symbols takes Iterables as parameters, so we make one a Set and two as Lists.
    // Note that because these are immutable collections from Guava, iteration order is guaranteed.
    ImmutableSet<String> providedSymbols =
        ImmutableSet.of("com.example.Example1", "com.example.Example2", "com.example.Example3");
    Symbols symbols = new Symbols(providedSymbols);

    StringWriter writer = new StringWriter();
    ObjectMappers.WRITER.writeValue(writer, symbols);

    assertEquals(
        "{\"provided\":"
            + "[\"com.example.Example1\",\"com.example.Example2\",\"com.example.Example3\"]}",
        writer.toString());

    Symbols restoredSymbols = ObjectMappers.readValue(writer.toString(), Symbols.class);
    // We compare using lists to ensure order was preserved.
    assertEquals(
        ImmutableList.copyOf(providedSymbols), ImmutableList.copyOf(restoredSymbols.provided));
  }
}