fix(android): cast from the Wi-Fi the phone is on, not its hotspotHEADmain

Android 17 lists the phone's own hotspot as a Wi-Fi network; taken first,
the television was handed an address it cannot reach.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

1 files changed, 29 insertions, 0 deletions

diff --git a/packages/meshbay-android/app/src/test/kotlin/org/meshbay/client/CastLanTest.kt b/packages/meshbay-android/app/src/test/kotlin/org/meshbay/client/CastLanTest.kt
new file mode 100644
index 00000000..8bdeed15
--- /dev/null
+++ b/packages/meshbay-android/app/src/test/kotlin/org/meshbay/client/CastLanTest.kt
@@ -0,0 +1,29 @@
+package org.meshbay.client
+
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertNull
+import org.junit.Test
+import org.meshbay.client.cast.CastChannels.Companion.pickLan
+import org.meshbay.client.cast.CastChannels.Lan
+import java.net.InetAddress
+
+/** Which address the relay is offered on, when the phone has more than one Wi-Fi. */
+class CastLanTest {
+    private val hotspot = Lan(InetAddress.getByName("10.105.183.74"), active = false, internet = false)
+    private val home = Lan(InetAddress.getByName("192.168.1.13"), active = true, internet = true)
+
+    @Test fun theWifiThePhoneIsOnWinsOverItsOwnHotspotListedFirst() =
+        assertEquals(home.address, pickLan(listOf(hotspot, home)))
+
+    @Test fun onMobileDataAWifiWithInternetWins() {
+        val wifi = Lan(InetAddress.getByName("192.168.1.13"), active = false, internet = true)
+        assertEquals(wifi.address, pickLan(listOf(hotspot, wifi)))
+    }
+
+    @Test fun aWifiWithoutInternetStillCasts() {
+        val offline = Lan(InetAddress.getByName("192.168.50.2"), active = false, internet = false)
+        assertEquals(offline.address, pickLan(listOf(offline)))
+    }
+
+    @Test fun noWifiNoRelay() = assertNull(pickLan(emptyList()))
+}