package com.sptmobile.endpoint

import org.junit.Assert.assertEquals
import org.junit.Assert.assertNull
import org.junit.Test

/** Parity twin of `rust/link-proto/src/event.rs` tests. */
class EventFrameTest {
    @Test
    fun ampLastDecodeOrder() {
        // `&amp;lt;` must decode to the literal text `&lt;`, NOT to `<`.
        assertEquals("&lt;", EventFrame.decodeBody("&amp;lt;"))
        assertEquals(
            "a\nb <x> \"q\" & done",
            EventFrame.decodeBody("a<br>b &lt;x&gt; &quot;q&quot; &amp; done"),
        )
    }

    @Test
    fun eventRoundTripWithJsonAttr() {
        // The composed user-msg envelope: json attr rides attr-escaped and
        // must come back verbatim — the msg-id dedup seam (KNOWN-HAZARDS 3.1).
        val frame =
            """<EVENT type="user-msg" from="mobile-gw" json="{&quot;origin&quot;:&quot;voice&quot;,&quot;msg-id&quot;:&quot;u-1&quot;}">hello<br>world</EVENT>"""
        val ev = EventFrame.parse(frame)!!
        assertEquals("user-msg", ev.attr("type"))
        assertEquals("mobile-gw", ev.attr("from"))
        assertEquals("""{"origin":"voice","msg-id":"u-1"}""", ev.attr("json"))
        assertEquals("hello\nworld", ev.body)
    }

    @Test
    fun malformedFramesAreNullNotFatal() {
        assertNull(EventFrame.parse("<EVENT no-close"))
        assertNull(EventFrame.parse("garbage with no events"))
        assertNull(EventFrame.parse("<EVENT key=unquoted>body</EVENT>"))
    }
}