/**
 * Copyright (c) 2008, SnakeYAML
 *
 * 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 org.pyyaml;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.io.StringWriter;
import java.io.Writer;
import java.util.ArrayList;
import java.util.List;
import org.yaml.snakeyaml.DumperOptions;
import org.yaml.snakeyaml.emitter.Emitter;
import org.yaml.snakeyaml.emitter.EventConstructor;
import org.yaml.snakeyaml.error.YAMLException;
import org.yaml.snakeyaml.events.Event;

/**
 * imported from PyYAML
 */
public class PyErrorsTest extends PyImportTest {

  private boolean skip(String filename) {
    List<String> failures = new ArrayList<String>();
    // in python list cannot be a key in a dictionary.
    failures.add("unacceptable-key.loader-error");
    for (String name : failures) {
      if (name.equals(filename)) {
        return true;
      }
    }
    return false;
  }

  public void testLoaderErrors() throws FileNotFoundException {
    File[] files = getStreamsByExtension(".loader-error");
    assertTrue("No test files found.", files.length > 0);
    for (int i = 0; i < files.length; i++) {
      if (skip(files[i].getName())) {
        continue;
      }
      try {
        InputStream input = new FileInputStream(files[i]);
        for (Object document : loadAll(input)) {
          assertNotNull("File " + files[i], document);
        }
        input.close();
        fail("Loading must fail for " + files[i].getAbsolutePath());
        // System.err.println("Loading must fail for " +
        // files[i].getAbsolutePath());
      } catch (Exception e) {
        assertTrue(true);
      }
    }
  }

  public void testLoaderStringErrors() throws FileNotFoundException {
    File[] files = getStreamsByExtension(".loader-error");
    assertTrue("No test files found.", files.length > 0);
    for (int i = 0; i < files.length; i++) {
      if (skip(files[i].getName())) {
        continue;
      }
      try {
        String content = getResource(files[i].getName());
        for (Object document : loadAll(content.trim())) {
          assertNotNull(document);
        }
        fail("Loading must fail for " + files[i].getAbsolutePath());
        // System.err.println("Loading must fail for " +
        // files[i].getAbsolutePath());
      } catch (Exception e) {
        assertTrue(true);
      }
    }
  }

  public void testLoaderSingleErrors() throws FileNotFoundException {
    File[] files = getStreamsByExtension(".single-loader-error");
    assertTrue("No test files found.", files.length > 0);
    for (int i = 0; i < files.length; i++) {
      try {
        String content = getResource(files[i].getName());
        load(content.trim());
        fail("Loading must fail for " + files[i].getAbsolutePath());
        // multiple documents must not be accepted
        System.err.println("Loading must fail for " + files[i].getAbsolutePath());
      } catch (YAMLException e) {
        assertTrue(true);
      }
    }
  }

  @SuppressWarnings("unchecked")
  public void testEmitterErrors() {
    File[] files = getStreamsByExtension(".emitter-error");
    assertTrue("No test files found.", files.length > 0);
    for (int i = 0; i < files.length; i++) {
      String content = getResource(files[i].getName());
      List<Event> document = (List<Event>) load(new EventConstructor(), content.trim());
      Writer writer = new StringWriter();
      Emitter emitter = new Emitter(writer, new DumperOptions());
      try {
        for (Event event : document) {
          emitter.emit(event);
        }
        fail("Loading must fail for " + files[i].getAbsolutePath());
        // System.err.println("Loading must fail for " +
        // files[i].getAbsolutePath());
      } catch (Exception e) {
        assertTrue(true);
      }
    }
  }

  // testDumperErrors() is implemented in SerializerTest.java
}