Live group update messages on conversation list and conversation.

app/src/test/java/org/thoughtcrime/securesms/testutil/MainThreadUtil.java

@@ -0,0 +1,30 @@
+package org.thoughtcrime.securesms.testutil;
+
+import org.thoughtcrime.securesms.util.Util;
+
+import static org.mockito.Mockito.when;
+import static org.powermock.api.mockito.PowerMockito.doCallRealMethod;
+import static org.powermock.api.mockito.PowerMockito.mockStatic;
+
+public final class MainThreadUtil {
+
+  private MainThreadUtil() {
+  }
+
+  /**
+   * Makes {@link Util}'s Main thread assertions pass or fail during tests.
+   * <p>
+   * Use with {@link org.powermock.modules.junit4.PowerMockRunner} or robolectric with powermock
+   * rule and {@code @PrepareForTest(Util.class)}
+   */
+  public static void setMainThread(boolean isMainThread) {
+    mockStatic(Util.class);
+    when(Util.isMainThread()).thenReturn(isMainThread);
+    try {
+      doCallRealMethod().when(Util.class, "assertMainThread");
+      doCallRealMethod().when(Util.class, "assertNotMainThread");
+    } catch (Exception e) {
+      throw new AssertionError();
+    }
+  }
+}