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package org.javacs.lsp;
import static org.hamcrest.Matchers.*;
import static org.junit.Assert.*;
import com.google.gson.JsonObject;
import java.io.IOException;
import java.io.PipedInputStream;
import java.io.PipedOutputStream;
import java.nio.charset.Charset;
import java.util.Optional;
import org.junit.Before;
import org.junit.Test;
public class LspTest {
PipedInputStream buffer = new PipedInputStream(10 * 1024 * 1024); // 10 MB buffer
PipedOutputStream writer = new PipedOutputStream();
@Before
public void connectBuffer() throws IOException {
writer.connect(buffer);
}
String bufferToString() {
try {
var available = buffer.available();
var bytes = new byte[available];
var read = buffer.read(bytes);
assert read == available;
return new String(bytes, Charset.forName("UTF-8"));
} catch (IOException e) {
throw new RuntimeException(e);
}
}
@Test
public void writeResponse() {
LSP.respond(writer, 1, 2);
var expected = "Content-Length: 35\r\n\r\n{\"jsonrpc\":\"2.0\",\"id\":1,\"result\":2}";
assertThat(bufferToString(), equalTo(expected));
}
@Test
public void writeMultibyteCharacters() {
LSP.respond(writer, 1, "🔥");
var expected = "Content-Length: 40\r\n\r\n{\"jsonrpc\":\"2.0\",\"id\":1,\"result\":\"🔥\"}";
assertThat(bufferToString(), equalTo(expected));
}
@Test
public void writeOptional() {
LSP.respond(writer, 1, Optional.of(1));
var expected = "Content-Length: 35\r\n\r\n{\"jsonrpc\":\"2.0\",\"id\":1,\"result\":1}";
assertThat(bufferToString(), equalTo(expected));
}
@Test
public void writeEmpty() {
LSP.respond(writer, 1, Optional.empty());
var expected = "Content-Length: 38\r\n\r\n{\"jsonrpc\":\"2.0\",\"id\":1,\"result\":null}";
assertThat(bufferToString(), equalTo(expected));
}
@Test
public void readMessage() throws IOException {
var message = "{\"jsonrpc\":\"2.0\",\"id\":1,\"method\":\"initialize\",\"params\":{}}";
var header = String.format("Content-Length: %d\r\n\r\n", message.getBytes().length);
writer.write(header.getBytes());
writer.write(message.getBytes());
var token = LSP.nextToken(buffer);
assertThat(token, equalTo(message));
var parse = LSP.parseMessage(token);
assertThat(parse.jsonrpc, equalTo("2.0"));
assertThat(parse.id, equalTo(1));
assertThat(parse.method, equalTo("initialize"));
assertThat(parse.params, equalTo(new JsonObject()));
}
}
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