java: include unexpected exception name in message

java/shared/java/org/signal/libsignal/internal/FilterExceptions.java

@@ -66,8 +66,9 @@ public class FilterExceptions {
   }
 
   private static AssertionError reportUnexpectedException(Exception e) {
-    Log.e("libsignal", "Unexpected checked exception " + e.getClass(), e);
+    String message = "Unexpected checked exception " + e.getClass();
-    return new AssertionError(e);
+    Log.e("libsignal", message, e);
+    return new AssertionError(message, e);
   }
 
   /**

java/shared/test/java/org/signal/libsignal/internal/FilterExceptionsTest.java

@@ -0,0 +1,39 @@
+//
+// Copyright 2024 Signal Messenger, LLC.
+// SPDX-License-Identifier: AGPL-3.0-only
+//
+
+package org.signal.libsignal.media;
+
+import static org.hamcrest.CoreMatchers.containsString;
+import static org.junit.Assert.assertThat;
+import static org.junit.Assert.assertThrows;
+import static org.signal.libsignal.internal.FilterExceptions.filterExceptions;
+
+import org.junit.Test;
+import org.signal.libsignal.internal.FilterExceptions.ThrowingNativeVoidOperation;
+
+public class FilterExceptionsTest {
+
+  private static class UnexpectedException extends Exception {
+    public UnexpectedException(String message) {
+      super(message);
+    }
+  }
+
+  @Test
+  public void exceptionTextIncludesClass() {
+    AssertionError error =
+        assertThrows(
+            AssertionError.class,
+            () -> {
+              filterExceptions(
+                  (ThrowingNativeVoidOperation)
+                      () -> {
+                        throw new UnexpectedException("not expected");
+                      });
+            });
+
+    assertThat(error.getMessage(), containsString("FilterExceptionsTest$UnexpectedException"));
+  }
+}