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diff --git a/asm-commons/src/test/java/org/objectweb/asm/commons/SimpleRemapperTest.java b/asm-commons/src/test/java/org/objectweb/asm/commons/SimpleRemapperTest.java
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+// ASM: a very small and fast Java bytecode manipulation framework
+// Copyright (c) 2000-2011 INRIA, France Telecom
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1. Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in the
+//    documentation and/or other materials provided with the distribution.
+// 3. Neither the name of the copyright holders nor the names of its
+//    contributors may be used to endorse or promote products derived from
+//    this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+// THE POSSIBILITY OF SUCH DAMAGE.
+package org.objectweb.asm.commons;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+import org.junit.jupiter.api.Test;
+
+/**
+ * Unit tests for {@link SimpleRemapper}.
+ *
+ * @author Eric Bruneton
+ */
+class SimpleRemapperTest {
+
+  @Test
+  void testMapSignature_remapParentOnly_nestedClassExtends() {
+    String inputSignature = "LOuter<Ljava/lang/Object;>.Inner;";
+    Remapper remapper = new SimpleRemapper(Collections.singletonMap("Outer", "RenamedOuter"));
+
+    String remappedSignature = remapper.mapSignature(inputSignature, false);
+
+    assertEquals("LRenamedOuter<Ljava/lang/Object;>.Inner;", remappedSignature);
+  }
+
+  @Test
+  void testMapSignature_remapChildOnly_nestedClassExtends() {
+    String inputSignature = "LOuter<Ljava/lang/Object;>.Inner;";
+    Remapper remapper =
+        new SimpleRemapper(Collections.singletonMap("Outer$Inner", "Outer$RenamedInner"));
+
+    String remappedSignature = remapper.mapSignature(inputSignature, false);
+
+    assertEquals("LOuter<Ljava/lang/Object;>.RenamedInner;", remappedSignature);
+  }
+
+  @Test
+  void testMapSignature_remapChildOnly_nestedClassExtends_identifiersWithDollarSign() {
+    String inputSignature = "LOuter<Ljava/lang/Object;>.Inner$1;";
+    Remapper remapper =
+        new SimpleRemapper(Collections.singletonMap("Outer$Inner$1", "Outer$RenamedInner$1"));
+
+    String remappedSignature = remapper.mapSignature(inputSignature, false);
+
+    assertEquals("LOuter<Ljava/lang/Object;>.RenamedInner$1;", remappedSignature);
+  }
+
+  @Test
+  void testMapSignature_remapBothParentAndChild_nestedClassExtends() {
+    String inputSignature = "LOuter<Ljava/lang/Object;>.Inner;";
+    Map<String, String> mapping = new HashMap<>();
+    mapping.put("Outer", "RenamedOuter");
+    mapping.put("Outer$Inner", "RenamedOuter$RenamedInner");
+    Remapper remapper = new SimpleRemapper(mapping);
+
+    String remappedSignature = remapper.mapSignature(inputSignature, false);
+
+    assertEquals("LRenamedOuter<Ljava/lang/Object;>.RenamedInner;", remappedSignature);
+  }
+}