refactor(templates): add templated test prompt for Java and Kotlin

This commit introduces a new templated test prompt feature for Java and Kotlin projects. The feature allows developers to automatically generate test code examples based on the structure of their controller, service, or other testable components. The example code is tailored to the specific language and project context, providing a useful starting point for writing tests.

Author: phodal

docs/patterns/by-example.md

@@ -37,6 +37,20 @@ private fun findExampleCommitMessages(project: Project): String? {
 }
 ```
 
+## 测试代码示例
+
+参考语言实现：`JavaTestContextProvider`、`KotlinTestContextProvider`。
+
+步骤：
+
+1. 获取当前项目的被测试代码。
+2. 根据被测试代码寻找模板：`Controller`、`Service`、默认测试等。
+    - Kotlin：`ControllerTest.kt`, `ServiceTest.kt`, `Test.kt`
+    - Java: `ControllerTest.java`, `ServiceTest.java`, `Test.java`
+3. 根据模板生成测试代码。
+
+
+
 ## 文档示例
 
 DOC TODO

java/src/main/kotlin/cc/unitmesh/idea/provider/JavaTestContextProvider.kt

@@ -39,13 +39,14 @@ open class JavaTestContextProvider : ChatContextProvider {
 
         val language = creationContext.sourceFile?.language?.displayName ?: "Java"
 
+        val testPrompt = project.service<TemplatedTestPrompt>()
         val finalPrompt = when {
             isController(fileName) && isSpringRelated -> {
                 var testControllerPrompt = prompt + """
                             |- Use appropriate Spring test annotations such as `@MockBean`, `@Autowired`, `@WebMvcTest`, `@DataJpaTest`, `@AutoConfigureTestDatabase`, `@AutoConfigureMockMvc`, `@SpringBootTest` etc.
                             |""".trimMargin()
 
-                val lookup = project.service<TemplatedTestPrompt>().lookup("ControllerTest.java")
+                val lookup = testPrompt.lookup("ControllerTest.java")
                 if (lookup != null) {
                     testControllerPrompt += "\nHere is the Test code template as example\n```$language\n$lookup\n```\n"
                 }
@@ -59,7 +60,7 @@ open class JavaTestContextProvider : ChatContextProvider {
                             |- Assume that the database is empty before each test and create valid entities with consideration for data constraints (jakarta.validation.constraints).
                             |""".trimMargin()
 
-                val lookup = project.service<TemplatedTestPrompt>().lookup("ServiceTest.java")
+                val lookup = testPrompt.lookup("ServiceTest.java")
                 if (lookup != null) {
                     testServicePrompt += "\nHere is the Test code template as example\n```$language\n$lookup\n```\n"
                 }
@@ -68,7 +69,7 @@ open class JavaTestContextProvider : ChatContextProvider {
             }
 
             else -> {
-                val lookup = project.service<TemplatedTestPrompt>().lookup("Test.java")
+                val lookup = testPrompt.lookup("Test.java")
                 if (lookup != null) {
                     prompt += "\nHere is the Test code template as example\n```$language\n$lookup\n```\n"
                 }
@@ -89,7 +90,7 @@ open class JavaTestContextProvider : ChatContextProvider {
         fileName?.let { MvcUtil.isController(it, langFileSuffix()) } ?: false
 
 
-    val projectJunitCache = mutableMapOf<Project, String>()
+    private val projectJunitCache = mutableMapOf<Project, String>()
 
     /**
      * Returns a string representing the JUnit rule for the given project.

kotlin/src/main/kotlin/cc/unitmesh/kotlin/provider/KotlinTestContextProvider.kt

@@ -31,13 +31,14 @@ class KotlinTestContextProvider : JavaTestContextProvider() {
 
         val language = creationContext.sourceFile?.language?.displayName ?: "Kotlin"
 
+        val testPrompt = project.service<TemplatedTestPrompt>()
         val finalPrompt = when {
             isController(fileName) && isSpringRelated -> {
                 var testControllerPrompt = prompt + "\n" + """
                             |- Use appropriate Spring test annotations such as `@MockBean`, `@Autowired`, `@WebMvcTest`, `@DataJpaTest`, `@AutoConfigureTestDatabase`, `@AutoConfigureMockMvc`, `@SpringBootTest` etc.
                             |""".trimMargin()
 
-                val lookup = project.service<TemplatedTestPrompt>().lookup("ControllerTest.kt")
+                val lookup = testPrompt.lookup("ControllerTest.kt")
                 if (lookup != null) {
                     testControllerPrompt += "\nHere is the Test code template as example\n```$language\n$lookup\n```\n"
                 }
@@ -52,7 +53,7 @@ class KotlinTestContextProvider : JavaTestContextProvider() {
                             |""".trimMargin()
 
 
-                val lookup = project.service<TemplatedTestPrompt>().lookup("ServiceTest.kt")
+                val lookup = testPrompt.lookup("ServiceTest.kt")
                 if (lookup != null) {
                     testServicePrompt += "\nHere is the Test code template as example\n```$language\n$lookup\n```\n"
                 }
@@ -61,7 +62,7 @@ class KotlinTestContextProvider : JavaTestContextProvider() {
             }
 
             else -> {
-                val lookup = project.service<TemplatedTestPrompt>().lookup("Test.kt")
+                val lookup = testPrompt.lookup("Test.kt")
                 if (lookup != null) {
                     prompt += "\n" +
                             "Here is the Test code template as example\n```$language\n$lookup\n```\n"