/*
 * Copyright 2020-2024 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
 *
 *      https://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.cloud.fn.supplier.file;

import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.file.Files;
import java.nio.file.Path;
import java.time.Duration;

import org.junit.jupiter.api.Test;
import reactor.core.publisher.Flux;
import reactor.test.StepVerifier;

import org.springframework.messaging.Message;
import org.springframework.test.context.TestPropertySource;

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

/**
 * @author Gary Russell
 * @author Artem Bilan
 * @author Soby Chacko
 */
@TestPropertySource(properties = { "file.consumer.mode=ref", "file.supplier.filenameRegex = t.*.txt" })
public class FilePayloadWithRegexTests extends AbstractFileSupplierTests {

	@Test
	public void testRegexPattern() throws IOException {
		Path txtFile1 = tempDir.resolve("test1.txt");
		Files.write(txtFile1, "one".getBytes());
		Path nonTxtExtension = tempDir.resolve("hello.bin");
		Files.write(nonTxtExtension, ByteBuffer.allocate(4).putInt(1).array());
		Path txtFile2 = tempDir.resolve("abc.txt");
		Files.write(txtFile2, "two".getBytes());

		Flux<Message<?>> messageFlux = fileSupplier.get();

		StepVerifier stepVerifier = StepVerifier.create(messageFlux)
			.assertNext((message) -> assertThat(message.getPayload()).isEqualTo(txtFile1.toAbsolutePath().toFile()))
			.expectNoEvent(Duration.ofSeconds(1))
			.expectNoEvent(Duration.ofSeconds(1))
			.thenCancel()
			.verifyLater();

		stepVerifier.verify();
	}

}
