ServerSentEventReaderTest.java

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 * to you under the Apache License, Version 2.0 (the
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package org.apache.hc.client5.http.sse;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertNull;

import org.apache.hc.client5.http.sse.impl.ServerSentEventReader;
import org.junit.jupiter.api.Test;

class ServerSentEventReaderTest {

    static final class Capt implements ServerSentEventReader.Callback {
        String id, type, data, comment;
        Long retry;

        @Override
        public void onEvent(final String id, final String type, final String data) {
            this.id = id;
            this.type = type;
            this.data = data;
        }

        @Override
        public void onComment(final String comment) {
            this.comment = comment;
        }

        @Override
        public void onRetryChange(final long retryMs) {
            this.retry = retryMs;
        }
    }

    @Test
    void parsesMultiLineEventWithDefaults() {
        final Capt c = new Capt();
        final ServerSentEventReader r = new ServerSentEventReader(c);

        r.line("id: 42");
        r.line("data: hello");
        r.line("data: world");
        r.line(""); // dispatch

        assertEquals("42", c.id);
        assertEquals("message", c.type);
        assertEquals("hello\nworld", c.data);
    }

    @Test
    void parsesEventTypeAndCommentAndRetry() {
        final Capt c = new Capt();
        final ServerSentEventReader r = new ServerSentEventReader(c);

        r.line(": this is a comment");
        assertEquals("this is a comment", c.comment);

        r.line("event: update");
        r.line("retry: 1500");
        r.line("data: x");
        r.line(""); // dispatch

        assertEquals("update", c.type);
        assertEquals("x", c.data);
        assertEquals(Long.valueOf(1500L), c.retry);
    }

    @Test
    void ignoresIdWithNul() {
        final Capt c = new Capt();
        final ServerSentEventReader r = new ServerSentEventReader(c);

        r.line("id: a\u0000b");
        r.line("data: d");
        r.line("");

        assertNull(c.id);
        assertEquals("d", c.data);
    }
}