Add support for inline video playback of gifs in Conversation.

app/src/test/java/org/thoughtcrime/securesms/giph/mp4/GiphyMp4PlaybackControllerRangeComparatorTest.kt

@@ -0,0 +1,19 @@
+package org.thoughtcrime.securesms.giph.mp4
+
+import org.junit.Assert
+import org.junit.Test
+
+class GiphyMp4PlaybackControllerRangeComparatorTest {
+  @Test
+  fun `Given a range of numbers, when I sort with comparator, then I expect an array sorted from the center out`() {
+    val testSubject = createComparator(0, 10)
+
+    val sorted = (0..10).sortedWith(testSubject).toIntArray()
+    val expected = intArrayOf(5, 4, 6, 3, 7, 2, 8, 1, 9, 0, 10)
+
+    Assert.assertArrayEquals(expected, sorted)
+  }
+
+  private fun createComparator(start: Int, end: Int): GiphyMp4PlaybackController.RangeComparator =
+    GiphyMp4PlaybackController.RangeComparator(start, end)
+}

app/src/test/java/org/thoughtcrime/securesms/giph/mp4/GiphyMp4PlaybackPolicyEnforcerTest.kt

@@ -0,0 +1,54 @@
+package org.thoughtcrime.securesms.giph.mp4
+
+import org.junit.Assert
+import org.junit.Test
+import java.util.concurrent.TimeUnit
+
+class GiphyMp4PlaybackPolicyEnforcerTest {
+
+  @Test
+  fun `Given a 1s video, when I have a max time of 8s and max repeats of 4, then I expect 4 loops`() {
+    val mediaDuration = TimeUnit.SECONDS.toMillis(1)
+    val maxDuration = TimeUnit.SECONDS.toMillis(8)
+    val maxRepeats = 4L
+    var ended = false
+    val testSubject = GiphyMp4PlaybackPolicyEnforcer({ ended = true }, maxDuration, maxRepeats)
+
+    testSubject.setMediaDuration(mediaDuration)
+
+    Assert.assertTrue((0..2).map { testSubject.endPlayback() }.all { !it })
+    Assert.assertFalse(ended)
+    Assert.assertTrue(testSubject.endPlayback())
+    Assert.assertTrue(ended)
+  }
+
+  @Test
+  fun `Given a 3s video, when I have a max time of 8s and max repeats of 4, then I expect 2 loops`() {
+    val mediaDuration = TimeUnit.SECONDS.toMillis(3)
+    val maxDuration = TimeUnit.SECONDS.toMillis(8)
+    val maxRepeats = 4L
+    var ended = false
+    val testSubject = GiphyMp4PlaybackPolicyEnforcer({ ended = true }, maxDuration, maxRepeats)
+
+    testSubject.setMediaDuration(mediaDuration)
+
+    Assert.assertFalse(testSubject.endPlayback())
+    Assert.assertFalse(ended)
+    Assert.assertTrue(testSubject.endPlayback())
+    Assert.assertTrue(ended)
+  }
+
+  @Test
+  fun `Given a 10s video, when I have a max time of 8s and max repeats of 4, then I expect 1 loop`() {
+    val mediaDuration = TimeUnit.SECONDS.toMillis(10)
+    val maxDuration = TimeUnit.SECONDS.toMillis(8)
+    val maxRepeats = 4L
+    var ended = false
+    val testSubject = GiphyMp4PlaybackPolicyEnforcer({ ended = true }, maxDuration, maxRepeats)
+
+    testSubject.setMediaDuration(mediaDuration)
+
+    Assert.assertTrue(testSubject.endPlayback())
+    Assert.assertTrue(ended)
+  }
+}