/*
 * Copyright 2012-2015 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.boot.env;

import java.util.ArrayList;
import java.util.List;

import org.junit.Test;
import org.springframework.core.env.EnumerablePropertySource;
import org.springframework.core.env.PropertySource;
import org.springframework.core.io.ByteArrayResource;

import static org.hamcrest.Matchers.equalTo;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertThat;

/**
 * Tests for {@link YamlPropertySourceLoader}.
 *
 * @author Dave Syer
 * @author Phillip Webb
 * @author Andy Wilkinson
 */
public class YamlPropertySourceLoaderTests {

	private YamlPropertySourceLoader loader = new YamlPropertySourceLoader();

	@Test
	public void load() throws Exception {
		ByteArrayResource resource = new ByteArrayResource(
				"foo:\n  bar: spam".getBytes());
		PropertySource<?> source = this.loader.load("resource", resource, null);
		assertNotNull(source);
		assertEquals("spam", source.getProperty("foo.bar"));
	}

	@Test
	public void orderedItems() throws Exception {
		StringBuilder yaml = new StringBuilder();
		List<String> expected = new ArrayList<String>();
		for (char c = 'a'; c <= 'z'; c++) {
			yaml.append(c + ": value" + c + "\n");
			expected.add(String.valueOf(c));
		}
		ByteArrayResource resource = new ByteArrayResource(yaml.toString().getBytes());
		EnumerablePropertySource<?> source = (EnumerablePropertySource<?>) this.loader
				.load("resource", resource, null);
		assertNotNull(source);
		assertThat(source.getPropertyNames(), equalTo(expected.toArray(new String[] {})));
	}

	@Test
	public void mergeItems() throws Exception {
		StringBuilder yaml = new StringBuilder();
		yaml.append("foo:\n  bar: spam\n");
		yaml.append("---\n");
		yaml.append("foo:\n  baz: wham\n");
		ByteArrayResource resource = new ByteArrayResource(yaml.toString().getBytes());
		PropertySource<?> source = this.loader.load("resource", resource, null);
		assertNotNull(source);
		assertEquals("spam", source.getProperty("foo.bar"));
		assertEquals("wham", source.getProperty("foo.baz"));
	}

	@Test
	public void timestampLikeItemsDoNotBecomeDates() throws Exception {
		ByteArrayResource resource = new ByteArrayResource("foo: 2015-01-28".getBytes());
		PropertySource<?> source = this.loader.load("resource", resource, null);
		assertNotNull(source);
		assertEquals("2015-01-28", source.getProperty("foo"));
	}

}
