/*
 * Copyright 2012-2018 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 org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;

import org.springframework.boot.json.JsonParseException;
import org.springframework.boot.origin.PropertySourceOrigin;
import org.springframework.core.env.ConfigurableEnvironment;
import org.springframework.core.env.PropertySource;
import org.springframework.core.env.StandardEnvironment;
import org.springframework.test.context.support.TestPropertySourceUtils;

import static org.assertj.core.api.Assertions.assertThat;

/**
 * Tests for {@link SpringApplicationJsonEnvironmentPostProcessor}.
 *
 * @author Dave Syer
 * @author Madhura Bhave
 * @author Phillip Webb
 * @author Artsiom Yudovin
 */
public class SpringApplicationJsonEnvironmentPostProcessorTests {

	@Rule
	public ExpectedException expected = ExpectedException.none();

	private SpringApplicationJsonEnvironmentPostProcessor processor = new SpringApplicationJsonEnvironmentPostProcessor();

	private ConfigurableEnvironment environment = new StandardEnvironment();

	@Test
	public void error() {
		this.expected.expect(JsonParseException.class);
		this.expected.expectMessage("Cannot parse JSON");
		assertThat(this.environment.resolvePlaceholders("${foo:}")).isEmpty();
		TestPropertySourceUtils.addInlinedPropertiesToEnvironment(this.environment,
				"spring.application.json=foo:bar");
		this.processor.postProcessEnvironment(this.environment, null);
		assertThat(this.environment.resolvePlaceholders("${foo:}")).isEmpty();
	}

	@Test
	public void missing() {
		assertThat(this.environment.resolvePlaceholders("${foo:}")).isEmpty();
		this.processor.postProcessEnvironment(this.environment, null);
		assertThat(this.environment.resolvePlaceholders("${foo:}")).isEmpty();
	}

	@Test
	public void empty() {
		assertThat(this.environment.resolvePlaceholders("${foo:}")).isEmpty();
		TestPropertySourceUtils.addInlinedPropertiesToEnvironment(this.environment,
				"spring.application.json={}");
		this.processor.postProcessEnvironment(this.environment, null);
		assertThat(this.environment.resolvePlaceholders("${foo:}")).isEmpty();
	}

	@Test
	public void periodSeparated() {
		assertThat(this.environment.resolvePlaceholders("${foo:}")).isEmpty();
		TestPropertySourceUtils.addInlinedPropertiesToEnvironment(this.environment,
				"spring.application.json={\"foo\":\"bar\"}");
		this.processor.postProcessEnvironment(this.environment, null);
		assertThat(this.environment.resolvePlaceholders("${foo:}")).isEqualTo("bar");
	}

	@Test
	public void envVar() {
		assertThat(this.environment.resolvePlaceholders("${foo:}")).isEmpty();
		TestPropertySourceUtils.addInlinedPropertiesToEnvironment(this.environment,
				"SPRING_APPLICATION_JSON={\"foo\":\"bar\"}");
		this.processor.postProcessEnvironment(this.environment, null);
		assertThat(this.environment.resolvePlaceholders("${foo:}")).isEqualTo("bar");
	}

	@Test
	public void nested() {
		assertThat(this.environment.resolvePlaceholders("${foo:}")).isEmpty();
		TestPropertySourceUtils.addInlinedPropertiesToEnvironment(this.environment,
				"SPRING_APPLICATION_JSON={\"foo\":{\"bar\":\"spam\",\"rab\":\"maps\"}}");
		this.processor.postProcessEnvironment(this.environment, null);
		assertThat(this.environment.resolvePlaceholders("${foo.bar:}")).isEqualTo("spam");
		assertThat(this.environment.resolvePlaceholders("${foo.rab:}")).isEqualTo("maps");
	}

	@Test
	public void prefixed() {
		assertThat(this.environment.resolvePlaceholders("${foo:}")).isEmpty();
		TestPropertySourceUtils.addInlinedPropertiesToEnvironment(this.environment,
				"SPRING_APPLICATION_JSON={\"foo.bar\":\"spam\"}");
		this.processor.postProcessEnvironment(this.environment, null);
		assertThat(this.environment.resolvePlaceholders("${foo.bar:}")).isEqualTo("spam");
	}

	@Test
	public void list() {
		assertThat(this.environment.resolvePlaceholders("${foo[1]:}")).isEmpty();
		TestPropertySourceUtils.addInlinedPropertiesToEnvironment(this.environment,
				"SPRING_APPLICATION_JSON={\"foo\":[\"bar\",\"spam\"]}");
		this.processor.postProcessEnvironment(this.environment, null);
		assertThat(this.environment.resolvePlaceholders("${foo[1]:}")).isEqualTo("spam");
	}

	@Test
	public void listOfObject() {
		assertThat(this.environment.resolvePlaceholders("${foo[0].bar:}")).isEmpty();
		TestPropertySourceUtils.addInlinedPropertiesToEnvironment(this.environment,
				"SPRING_APPLICATION_JSON={\"foo\":[{\"bar\":\"spam\"}]}");
		this.processor.postProcessEnvironment(this.environment, null);
		assertThat(this.environment.resolvePlaceholders("${foo[0].bar:}"))
				.isEqualTo("spam");
	}

	@Test
	public void propertySourceShouldTrackOrigin() {
		assertThat(this.environment.resolvePlaceholders("${foo:}")).isEmpty();
		TestPropertySourceUtils.addInlinedPropertiesToEnvironment(this.environment,
				"spring.application.json={\"foo\":\"bar\"}");
		this.processor.postProcessEnvironment(this.environment, null);
		PropertySource<?> propertySource = this.environment.getPropertySources()
				.get("spring.application.json");
		PropertySourceOrigin origin = (PropertySourceOrigin) PropertySourceOrigin
				.get(propertySource, "foo");
		assertThat(origin.getPropertySource().getName())
				.isEqualTo("Inlined Test Properties");
		assertThat(origin.getPropertyName()).isEqualTo("spring.application.json");
		assertThat(this.environment.resolvePlaceholders("${foo:}")).isEqualTo("bar");
	}

}
