test(normalize-class): add tests and schema for class normalization

plugins/src/test/java/io/github/rawvoid/jaxb/plugin/NormalizeClassPluginTest.java

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+/*
+ * Copyright 2026 Rawvoid(https://github.com/rawvoid)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.github.rawvoid.jaxb.plugin;
+
+import io.github.rawvoid.jaxb.AbstractXJCMojoTestCase;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class NormalizeClassPluginTest extends AbstractXJCMojoTestCase {
+
+    @BeforeEach
+    void setSchema() {
+        schemaIncludes = List.of("normalize-class.xsd");
+    }
+
+    @Test
+    void testNormalizeDuplicateClasses() throws Exception {
+        var args = List.of(
+            "-Xnormalize-class"
+        );
+        var classes = testExecute(args, ".*", null);
+        var classBySimpleName = classes.stream()
+            .collect(Collectors.groupingBy(Class::getSimpleName));
+
+        assertThat(classBySimpleName).containsKeys("NormalizeRoot", "Group", "AnotherGroup", "Entry");
+        assertThat(classBySimpleName.get("Entry")).hasSize(1);
+
+        var groupClass = classBySimpleName.get("Group").getFirst();
+        var anotherGroupClass = classBySimpleName.get("AnotherGroup").getFirst();
+        var entryClass = classBySimpleName.get("Entry").getFirst();
+
+        assertThat(groupClass.getDeclaredField("entry").getType()).isEqualTo(entryClass);
+        assertThat(anotherGroupClass.getDeclaredField("entry").getType()).isEqualTo(entryClass);
+    }
+}

plugins/src/test/resources/schema/normalize-class.xsd

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+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ~ Copyright 2026 Rawvoid(https://github.com/rawvoid)
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
+<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
+           targetNamespace="https://www.github.com/rawvoid/xjc-plugins/normalize"
+           xmlns:tns="https://www.github.com/rawvoid/xjc-plugins/normalize"
+           elementFormDefault="qualified">
+
+    <xs:complexType name="NormalizeRoot">
+        <xs:sequence>
+            <xs:element name="group">
+                <xs:complexType>
+                    <xs:sequence>
+                        <xs:element name="entry">
+                            <xs:complexType>
+                                <xs:sequence>
+                                    <xs:element name="value" type="xs:string"/>
+                                </xs:sequence>
+                            </xs:complexType>
+                        </xs:element>
+                    </xs:sequence>
+                </xs:complexType>
+            </xs:element>
+            <xs:element name="anotherGroup">
+                <xs:complexType>
+                    <xs:sequence>
+                        <xs:element name="entry">
+                            <xs:complexType>
+                                <xs:sequence>
+                                    <xs:element name="value" type="xs:string"/>
+                                </xs:sequence>
+                            </xs:complexType>
+                        </xs:element>
+                    </xs:sequence>
+                </xs:complexType>
+            </xs:element>
+        </xs:sequence>
+    </xs:complexType>
+
+    <xs:element name="normalizeRoot" type="tns:NormalizeRoot"/>
+</xs:schema>