Added unit test

Author: intellinside

spring-cache-tags/pom.xml

@@ -13,6 +13,8 @@
     <artifactId>spring-cache-tags</artifactId>
 
     <properties>
+        <maven-compiler-plugin.version>3.14.1</maven-compiler-plugin.version>
+        <maven-surefire-plugin.version>3.5.4</maven-surefire-plugin.version>
     </properties>
 
     <dependencies>
@@ -36,5 +38,34 @@
             <groupId>jakarta.annotation</groupId>
             <artifactId>jakarta.annotation-api</artifactId>
         </dependency>
+        <!-- Test dependencies -->
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter</artifactId>
+            <scope>test</scope>
+        </dependency>
     </dependencies>
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>${maven-compiler-plugin.version}</version>
+                <configuration>
+                    <compilerArgs>
+                        <arg>-parameters</arg>
+                    </compilerArgs>
+                    <release>${java.version}</release>
+                </configuration>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-surefire-plugin</artifactId>
+                <version>${maven-surefire-plugin.version}</version>
+                <configuration>
+                    <useModulePath>false</useModulePath>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
 </project>

spring-cache-tags/src/test/java/io/github/intellinside/cache/tags/annotation/SpelExpressionEvaluatorTest.java

@@ -0,0 +1,71 @@
+package io.github.intellinside.cache.tags.annotation;
+
+import org.junit.jupiter.api.Test;
+
+import java.lang.reflect.Method;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class SpelExpressionEvaluatorTest {
+    private final SpelExpressionEvaluator evaluator = new SpelExpressionEvaluator();
+
+    static class Sample {
+        public void foo(String userId, int count) {
+        }
+    }
+
+    static class Result {
+        private final int id;
+
+        Result(int id) {
+            this.id = id;
+        }
+
+        public int getId() {
+            return id;
+        }
+    }
+
+    @Test
+    void evaluateWithArgsIndex() throws Exception {
+        Method method = Sample.class.getMethod("foo", String.class, int.class);
+        String out = evaluator.evaluate("'cache:' + #args[0]", method, null, "123", 5);
+        assertEquals("cache:123", out);
+    }
+
+    @Test
+    void evaluateWithResultProperty() throws Exception {
+        Method method = Sample.class.getMethod("foo", String.class, int.class);
+        Result result = new Result(42);
+        String out = evaluator.evaluate("'result:' + #result.id", method, result, "x", 1);
+        assertEquals("result:42", out);
+    }
+
+    @Test
+    void evaluateWithTemplateParserContext() throws Exception {
+        Method method = Sample.class.getMethod("foo", String.class, int.class);
+        String out = evaluator.evaluate("User: #{#args[0]}", method, null, "7", 2);
+        assertEquals("User: 7", out);
+    }
+
+    @Test
+    void evaluateWithParamName() throws Exception {
+        Method method = Sample.class.getMethod("foo", String.class, int.class);
+        String out = evaluator.evaluate("'cache:' + #userId", method, null, "abc", 3);
+        assertEquals("cache:abc", out);
+    }
+
+    @Test
+    void evaluateWithParamNameTemplate() throws Exception {
+        Method method = Sample.class.getMethod("foo", String.class, int.class);
+        String out = evaluator.evaluate("User: #{#userId}", method, null, "xyz", 4);
+        assertEquals("User: xyz", out);
+    }
+
+    @Test
+    void evaluateMethodVariable() throws Exception {
+        Method method = Sample.class.getMethod("foo", String.class, int.class);
+        String out = evaluator.evaluate("#method.name", method, null, "a", 0);
+        assertEquals(method.getName(), out);
+    }
+}