Handle empty test cases list - improved (#1098)

Author: denis-fokin

utbot-framework/src/main/kotlin/org/utbot/framework/codegen/model/constructor/tree/TestsGenerationReport.kt

@@ -19,17 +19,16 @@ data class TestsGenerationReport(
     var crashExecutions: MethodGeneratedTests = mutableMapOf(),
     var errors: MutableMap<ExecutableId, ErrorsCount> = mutableMapOf()
 ) {
-    val classUnderTest: KClass<*>
+    val classUnderTest: KClass<*>?
         get() = executables.firstOrNull()?.classId?.kClass
-            ?: error("No executables found in test report")
 
     val initialWarnings: MutableList<() -> String> = mutableListOf()
     val hasWarnings: Boolean
         get() = initialWarnings.isNotEmpty()
 
     val detailedStatistics: String
         get() = buildString {
-            appendHtmlLine("Class: ${classUnderTest.qualifiedName}")
+            classUnderTest?.let { appendHtmlLine("Class: ${it.qualifiedName}") }
             val testMethodsStatistic = executables.map { it.countTestMethods() }
             val errors = executables.map { it.countErrors() }
             val overallErrors = errors.sum()
@@ -71,7 +70,7 @@ data class TestsGenerationReport(
     }
 
     fun toString(isShort: Boolean): String = buildString {
-        appendHtmlLine("Target: ${classUnderTest.qualifiedName}")
+        classUnderTest?.let { appendHtmlLine("Target: ${it.qualifiedName}") }
         if (initialWarnings.isNotEmpty()) {
             initialWarnings.forEach { appendHtmlLine(it()) }
             appendHtmlLine()

utbot-framework/src/main/kotlin/org/utbot/framework/process/EngineMain.kt

@@ -197,7 +197,7 @@ private fun EngineProcessModel.setup(
                 appendHtmlLine(report.toString(isShort = true))
 
                 val classUnderTestPackageName =
-                    report.classUnderTest.java.nameOfPackage
+                    report.classUnderTest?.java?.nameOfPackage ?: ""
 
                 destinationWarningMessage(testPackageName, classUnderTestPackageName)
                     ?.let {
@@ -227,7 +227,7 @@ private fun EngineProcessModel.setup(
 
                 for (report in reports) {
                     val classUnderTestPackageName =
-                        report.classUnderTest.java.nameOfPackage
+                        report.classUnderTest?.java?.nameOfPackage ?: ""
 
                     hasWarnings = hasWarnings || report.hasWarnings
                     if (!isMultiPackage) {