Added support for summaries on the nested classes (#1452)

Author: amandelpie

utbot-sample/src/main/java/org/utbot/examples/nested/DeepNested.java

@@ -0,0 +1,14 @@
+package org.utbot.examples.nested;
+
+public class DeepNested {
+    public class Nested1 {
+        public class Nested2 {
+            public int f(int i) {
+                if (i > 0) {
+                    return 10;
+                }
+                return 0;
+            }
+        }
+    }
+}

utbot-summary-tests/src/test/kotlin/examples/nested/SummaryNestedTest.kt

@@ -0,0 +1,55 @@
+package examples.nested
+
+import examples.CustomJavaDocTagsEnabler
+import examples.SummaryTestCaseGeneratorTest
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.extension.ExtendWith
+import org.utbot.examples.nested.DeepNested
+import org.utbot.examples.recursion.Recursion
+import org.utbot.framework.plugin.api.MockStrategyApi
+import org.utbot.testing.DoNotCalculate
+
+@ExtendWith(CustomJavaDocTagsEnabler::class)
+class SummaryNestedTest : SummaryTestCaseGeneratorTest(
+    DeepNested.Nested1.Nested2::class
+) {
+    @Test
+    fun testNested() {
+        val summary1 = "@utbot.classUnderTest {@link DeepNested.Nested1.Nested2}\n" +
+                "@utbot.methodUnderTest {@link org.utbot.examples.nested.DeepNested.Nested1.Nested2#f(int)}\n" +
+                "@utbot.executesCondition {@code (i > 0): False}\n" +
+                "@utbot.returnsFrom {@code return 0;}\n"
+
+        val summary2 = "@utbot.classUnderTest {@link DeepNested.Nested1.Nested2}\n" +
+                "@utbot.methodUnderTest {@link org.utbot.examples.nested.DeepNested.Nested1.Nested2#f(int)}\n" +
+                "@utbot.executesCondition {@code (i > 0): True}\n" +
+                "@utbot.returnsFrom {@code return 10;}"
+
+        val methodName1 = "testF_ILessOrEqualZero"
+        val methodName2 = "testF_IGreaterThanZero"
+
+        val displayName1 = "i > 0 : False -> return 0"
+        val displayName2 = "i > 0 : True -> return 10"
+
+        val summaryKeys = listOf(
+            summary1,
+            summary2
+        )
+
+        val displayNames = listOf(
+            displayName1,
+            displayName2
+        )
+
+        val methodNames = listOf(
+            methodName1,
+            methodName2
+        )
+
+        val method = DeepNested.Nested1.Nested2::f
+        val mockStrategy = MockStrategyApi.NO_MOCKS
+        val coverage = DoNotCalculate
+
+        summaryCheck(method, mockStrategy, coverage, summaryKeys, methodNames, displayNames)
+    }
+}

utbot-summary/src/main/kotlin/org/utbot/summary/ast/SourceCodeParser.kt

@@ -55,7 +55,7 @@ class SourceCodeParser {
             val clazz = it.types.firstOrNull { clazz ->
                 clazz.name.identifier == className
             } ?: traverseInnerClassDeclarations(
-                it.types.flatMap { declaration -> declaration.childNodes },
+                it.types.flatMap { declaration -> declaration.childNodes }.filterIsInstance<ClassOrInterfaceDeclaration>(),
                 className
             )
 
@@ -84,9 +84,23 @@ class SourceCodeParser {
      * Identifier is ClassOrInterfaceDeclaration
      */
     private fun traverseInnerClassDeclarations(
-        nodes: List<Node>, className: String
-    ): TypeDeclaration<*>? = nodes.filterIsInstance<ClassOrInterfaceDeclaration>()
-        .firstOrNull { it.name.identifier == className }
+        nodes: List<ClassOrInterfaceDeclaration>, className: String
+    ): TypeDeclaration<*>? {
+        var result = nodes.firstOrNull { it.name.identifier == className }
+
+        if (result != null) return result
+
+        run childrenSearch@ {
+            nodes.forEach {
+                val childNodes = it.childNodes.filterIsInstance<ClassOrInterfaceDeclaration>()
+                if (childNodes.isNotEmpty()) {
+                    result = traverseInnerClassDeclarations(childNodes, className) as ClassOrInterfaceDeclaration?
+                    if (result!= null) return@childrenSearch
+                }
+            }
+        }
+        return result
+    }
 }
 
 /**