/*
 * Copyright 2002-2012 the original author or authors.
 *
 * 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.springframework.core.env;

import static org.hamcrest.CoreMatchers.equalTo;
import static org.hamcrest.CoreMatchers.is;
import static org.junit.Assert.assertThat;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Properties;

import org.apache.log4j.Level;
import org.apache.log4j.Logger;
import org.junit.Test;

/**
 * Unit tests for {@link AbstractPropertySource} implementations.
 *
 * @author Chris Beams
 * @since 3.1
 */
public class PropertySourceTests {
	@Test @SuppressWarnings("serial")
	public void equals() {
		Map<String, Object> map1 = new HashMap<String, Object>() {{ put("a", "b"); }};
		Map<String, Object> map2 = new HashMap<String, Object>() {{ put("c", "d"); }};
		Properties props1 = new Properties() {{ setProperty("a", "b"); }};
		Properties props2 = new Properties() {{ setProperty("c", "d"); }};

		MapPropertySource mps = new MapPropertySource("mps", map1);
		assertThat(mps, equalTo(mps));

		assertThat(new MapPropertySource("x", map1).equals(new MapPropertySource("x", map1)), is(true));
		assertThat(new MapPropertySource("x", map1).equals(new MapPropertySource("x", map2)), is(true));
		assertThat(new MapPropertySource("x", map1).equals(new PropertiesPropertySource("x", props1)), is(true));
		assertThat(new MapPropertySource("x", map1).equals(new PropertiesPropertySource("x", props2)), is(true));

		assertThat(new MapPropertySource("x", map1).equals(new Object()), is(false));
		assertThat(new MapPropertySource("x", map1).equals("x"), is(false));
		assertThat(new MapPropertySource("x", map1).equals(new MapPropertySource("y", map1)), is(false));
		assertThat(new MapPropertySource("x", map1).equals(new MapPropertySource("y", map2)), is(false));
		assertThat(new MapPropertySource("x", map1).equals(new PropertiesPropertySource("y", props1)), is(false));
		assertThat(new MapPropertySource("x", map1).equals(new PropertiesPropertySource("y", props2)), is(false));
	}

	@Test @SuppressWarnings("serial")
	public void collectionsOperations() {
		Map<String, Object> map1 = new HashMap<String, Object>() {{ put("a", "b"); }};
		Map<String, Object> map2 = new HashMap<String, Object>() {{ put("c", "d"); }};

		PropertySource<?> ps1 = new MapPropertySource("ps1", map1);
		ps1.getSource();
		List<PropertySource<?>> propertySources = new ArrayList<PropertySource<?>>();
		assertThat(propertySources.add(ps1), equalTo(true));
		assertThat(propertySources.contains(ps1), is(true));
		assertThat(propertySources.contains(PropertySource.named("ps1")), is(true));

		PropertySource<?> ps1replacement = new MapPropertySource("ps1", map2); // notice - different map
		assertThat(propertySources.add(ps1replacement), is(true)); // true because linkedlist allows duplicates
		assertThat(propertySources.size(), is(2));
		assertThat(propertySources.remove(PropertySource.named("ps1")), is(true));
		assertThat(propertySources.size(), is(1));
		assertThat(propertySources.remove(PropertySource.named("ps1")), is(true));
		assertThat(propertySources.size(), is(0));

		PropertySource<?> ps2 = new MapPropertySource("ps2", map2);
		propertySources.add(ps1);
		propertySources.add(ps2);
		assertThat(propertySources.indexOf(PropertySource.named("ps1")), is(0));
		assertThat(propertySources.indexOf(PropertySource.named("ps2")), is(1));
		propertySources.clear();
	}

	@Test @SuppressWarnings("serial")
	public void toString_verbosityVariesOnLogLevel() {
		String name = "props";
		Map<String, Object> map = new HashMap<String, Object>() {{ put("k1", "v1"); }};
		MapPropertySource ps = new MapPropertySource(name, map);
		Logger logger = Logger.getLogger(ps.getClass());
		Level original = logger.getLevel();

		try {
			logger.setLevel(Level.DEBUG);
			assertThat("PropertySource.toString() should render verbose output for log levels <= DEBUG",
					ps.toString(),
					equalTo(String.format("%s@%s [name='%s', properties=%s]",
							ps.getClass().getSimpleName(),
							System.identityHashCode(ps),
							name,
							map)));

			logger.setLevel(Level.INFO);
			assertThat("PropertySource.toString() should render concise output for log levels >= INFO",
					ps.toString(),
					equalTo(String.format("%s [name='%s']",
							ps.getClass().getSimpleName(),
							name,
							map.size())));
		} finally {
			logger.setLevel(original);
		}
	}
}
