Payments.

Co-authored-by: Alan Evans <alan@signal.org>
Co-authored-by: Alex Hart <alex@signal.org>
Co-authored-by: Cody Henthorne <cody@signal.org>

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

@@ -0,0 +1,50 @@
+package org.thoughtcrime.securesms.testutil;
+
+import org.signal.core.util.logging.Log;
+
+public final class SystemOutLogger extends Log.Logger {
+  @Override
+  public void v(String tag, String message, Throwable t) {
+    printlnFormatted('v', tag, message, t);
+  }
+
+  @Override
+  public void d(String tag, String message, Throwable t) {
+    printlnFormatted('d', tag, message, t);
+  }
+
+  @Override
+  public void i(String tag, String message, Throwable t) {
+    printlnFormatted('i', tag, message, t);
+  }
+
+  @Override
+  public void w(String tag, String message, Throwable t) {
+    printlnFormatted('w', tag, message, t);
+  }
+
+  @Override
+  public void e(String tag, String message, Throwable t) {
+    printlnFormatted('e', tag, message, t);
+  }
+
+  @Override
+  public void wtf(String tag, String message, Throwable t) {
+    printlnFormatted('x', tag, message, t);
+  }
+
+  @Override
+  public void blockUntilAllWritesFinished() { }
+
+  private void printlnFormatted(char level, String tag, String message, Throwable t) {
+    System.out.println(format(level, tag, message, t));
+  }
+
+  private String format(char level, String tag, String message, Throwable t) {
+    if (t != null) {
+      return String.format("%c[%s] %s %s:%s", level, tag, message, t.getClass().getSimpleName(), t.getMessage());
+    } else {
+      return String.format("%c[%s] %s", level, tag, message);
+    }
+  }
+}