Avoid summary duplication UnitTestBot#985 (UnitTestBot#1015)

* Avoid summary duplication UnitTestBot#985

* Fix rendering for 2022.1.4

Author: onewhl

utbot-intellij/src/main/kotlin/org/utbot/intellij/plugin/javadoc/UtDocumentationProvider.kt

@@ -5,6 +5,7 @@ import com.intellij.codeInsight.javadoc.JavaDocInfoGenerator
 import com.intellij.lang.java.JavaDocumentationProvider
 import com.intellij.psi.PsiDocCommentBase
 import com.intellij.psi.PsiJavaDocumentedElement
+import com.intellij.psi.javadoc.PsiDocComment
 
 /**
  * To render UtBot custom JavaDoc tags messages, we need to override basic behaviour of [JavaDocumentationProvider].
@@ -25,12 +26,27 @@ class UtDocumentationProvider : JavaDocumentationProvider() {
         // get JavaDoc comment rendered by the platform.
         val baseJavaDocInfo = baseJavaDocInfoGenerator.generateRenderedDocInfo()
 
+        return getRenderedDoc(baseJavaDocInfo, docComment, comment)
+    }
+
+    /**
+     * Processes JavaDoc generated by IJ platform to render plugin's custom tags correctly.
+     */
+    private fun getRenderedDoc(
+        baseJavaDocInfo: String?,
+        docComment: PsiDocComment,
+        comment: PsiDocCommentBase
+    ): String? {
         // add UTBot sections with custom tags.
         val utJavaDocInfoGenerator = UtJavaDocInfoGenerator()
-        val javaDocInfoWithUtSections =
-            utJavaDocInfoGenerator.addUtBotSpecificSectionsToJavaDoc(baseJavaDocInfo, docComment)
-
-        return JavaDocExternalFilter.filterInternalDocInfo(javaDocInfoWithUtSections)
+        return if (baseJavaDocInfo != null && baseJavaDocInfo.contains("utbot")) {
+            val javaDocInfoWithUtSections =
+                utJavaDocInfoGenerator.addUtBotSpecificSectionsToJavaDoc(docComment)
+            val finalJavaDoc = replaceTagNamesWithMessages(javaDocInfoWithUtSections)
+            JavaDocExternalFilter.filterInternalDocInfo(finalJavaDoc)
+        } else {
+            super.generateRenderedDoc(comment)
+        }
     }
 
     /**

utbot-intellij/src/main/kotlin/org/utbot/intellij/plugin/javadoc/UtJavaDocInfoGenerator.kt

@@ -41,17 +41,14 @@ private val logger = KotlinLogging.logger {}
  * so delete it after updating and use basic [com.intellij.codeInsight.javadoc.JavaDocInfoGenerator].
  */
 class UtJavaDocInfoGenerator {
-    fun addUtBotSpecificSectionsToJavaDoc(javadoc: String?, comment: PsiDocComment): String {
-        val builder = if (javadoc == null) {
-            StringBuilder()
-        } else {
-            StringBuilder(javadoc)
-        }
+    fun addUtBotSpecificSectionsToJavaDoc(comment: PsiDocComment): String {
+        val builder = StringBuilder()
 
         val docTagProvider = UtCustomJavaDocTagProvider()
         docTagProvider.supportedTags.forEach {
             generateUtTagSection(builder, comment, it)
         }
+
         return builder.toString()
     }