Test Android frame pacing and extend hardware diagnostics to 60 fps

tools/chatgui-android/app/src/test/java/com/utun/chat/data/CallVideoCadenceTest.kt

@@ -0,0 +1,31 @@
+package com.utun.chat.data
+
+import org.junit.Assert.*
+import org.junit.Test
+
+class CallVideoCadenceTest {
+    @Test fun fasterCameraPreservesSelectedOutputRate() {
+        for (source in listOf(50, 60, 100, 330)) for (fps in listOf(30, 50, 60).filter { it <= source }) {
+            val cadence = CallVideoCadence(fps)
+            val accepted = (0 until source * 10).count { cadence.accept(1_000_000L + it * 1_000_000L / source) }
+            assertTrue("source=$source output=$fps accepted=$accepted", kotlin.math.abs(accepted - fps * 10) <= 1)
+        }
+    }
+    @Test fun jitterAndPauseDoNotCauseHalvingOrBurst() {
+        for (fps in listOf(30, 50, 60)) {
+            val cadence = CallVideoCadence(fps)
+            repeat(300) { assertTrue(cadence.accept(1_000_000L + it * 1_000_000L / fps + if (it % 2 == 0) 700 else -700)) }
+            assertTrue(cadence.accept(20_000_000)); assertFalse(cadence.accept(20_000_001))
+            assertFalse(cadence.accept(20_000_000)); assertFalse(cadence.accept(Long.MAX_VALUE))
+        }
+    }
+    @Test fun advertisedModesKeepSizeAndRateTogether() {
+        val low = CallVideoMode(1280, 720, 60); val high = CallVideoMode(1920, 1080, 30)
+        val state = CallVideoState(cameras = listOf(CallVideoCamera("c", "camera", listOf(low, high), 90, false)),
+            codecModes = mapOf(1 to listOf(high), 2 to listOf(low)))
+        assertEquals(listOf(low, high), state.modes("c", 0))
+        assertEquals(listOf(high), state.modes("c", 1))
+        assertEquals(listOf(low), state.modes("c", 2))
+        assertFalse(CallVideoMode(1920, 1080, 60) in state.modes("c", 0))
+    }
+}