重载 equalsCode 方法；添加单元测试

src/test/java/xyz/zhouxy/plusone/commons/base/IWithCodeTests.java

@@ -0,0 +1,57 @@
+package xyz.zhouxy.plusone.commons.base;
+
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import javax.annotation.Nonnull;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import xyz.zhouxy.plusone.commons.util.AssertTools;
+
+class IWithCodeTests {
+
+    private static class WithCodeImpl implements IWithCode<String> {
+        @Nonnull
+        private final String code;
+
+        WithCodeImpl(String code) {
+            AssertTools.checkNotNull(code);
+            this.code = code;
+        }
+
+        @Override
+        @Nonnull
+        public String getCode() {
+            return code;
+        }
+    }
+
+    private WithCodeImpl instance;
+
+    @BeforeEach
+    void setUp() {
+        instance = new WithCodeImpl("testCode");
+    }
+
+    @Test
+    void equalsCode_SameCode_ReturnsTrue() {
+        assertTrue(instance.equalsCode("testCode"));
+    }
+
+    @Test
+    void equalsCode_DifferentCode_ReturnsFalse() {
+        assertFalse(instance.equalsCode("wrongCode"));
+    }
+
+    @Test
+    void equalsCode_NullCode_ReturnsFalse() {
+        assertFalse(instance.equalsCode((String) null));
+    }
+
+    @Test
+    void equalsCode_NullObject_ReturnsFalse() {
+        assertFalse(instance.equalsCode((String) null));
+    }
+}