Add small amount of unit testing for MessageContentProcessor.

app/src/androidTest/java/org/thoughtcrime/securesms/testing/TestProtos.kt

@@ -0,0 +1,70 @@
+package org.thoughtcrime.securesms.testing
+
+import com.google.protobuf.ByteString
+import org.signal.libsignal.zkgroup.groups.GroupMasterKey
+import org.whispersystems.signalservice.api.push.ServiceId
+import org.whispersystems.signalservice.internal.push.SignalServiceProtos
+import org.whispersystems.signalservice.internal.push.SignalServiceProtos.DataMessage
+import org.whispersystems.signalservice.internal.push.SignalServiceProtos.GroupContextV2
+import org.whispersystems.signalservice.internal.serialize.protos.AddressProto
+import org.whispersystems.signalservice.internal.serialize.protos.MetadataProto
+import org.whispersystems.signalservice.internal.serialize.protos.SignalServiceContentProto
+import java.util.UUID
+import kotlin.random.Random
+
+class TestProtos private constructor() {
+  fun address(
+    uuid: UUID = UUID.randomUUID()
+  ): AddressProto.Builder {
+    return AddressProto.newBuilder()
+      .setUuid(ServiceId.from(uuid).toByteString())
+  }
+
+  fun metadata(
+    address: AddressProto = address().build(),
+  ): MetadataProto.Builder {
+    return MetadataProto.newBuilder()
+      .setAddress(address)
+  }
+
+  fun groupContextV2(
+    revision: Int = 0,
+    masterKeyBytes: ByteArray = Random.Default.nextBytes(GroupMasterKey.SIZE)
+  ): GroupContextV2.Builder {
+    return GroupContextV2.newBuilder()
+      .setRevision(revision)
+      .setMasterKey(ByteString.copyFrom(masterKeyBytes))
+  }
+
+  fun storyContext(
+    sentTimestamp: Long = Random.nextLong(),
+    authorUuid: String = UUID.randomUUID().toString()
+  ): DataMessage.StoryContext.Builder {
+    return DataMessage.StoryContext.newBuilder()
+      .setAuthorUuid(authorUuid)
+      .setSentTimestamp(sentTimestamp)
+  }
+
+  fun dataMessage(): DataMessage.Builder {
+    return DataMessage.newBuilder()
+  }
+
+  fun content(): SignalServiceProtos.Content.Builder {
+    return SignalServiceProtos.Content.newBuilder()
+  }
+
+  fun serviceContent(
+    localAddress: AddressProto = address().build(),
+    metadata: MetadataProto = metadata().build()
+  ): SignalServiceContentProto.Builder {
+    return SignalServiceContentProto.newBuilder()
+      .setLocalAddress(localAddress)
+      .setMetadata(metadata)
+  }
+
+  companion object {
+    fun <T> build(buildFn: TestProtos.() -> T): T {
+      return TestProtos().buildFn()
+    }
+  }
+}