Remember Test Sources root choice and suggest as default #1010

utbot-intellij/src/main/kotlin/org/utbot/intellij/plugin/models/GenerateTestsModel.kt

@@ -37,7 +37,7 @@ class GenerateTestsModel(
     potentialTestModules,
     srcClasses
 ) {
-
+    override var sourceRootHistory = project.service<Settings>().sourceRootHistory
     override var codegenLanguage = project.service<Settings>().codegenLanguage
 
     lateinit var testFramework: TestFramework

utbot-intellij/src/main/kotlin/org/utbot/intellij/plugin/settings/Settings.kt

@@ -44,6 +44,7 @@ import org.utbot.framework.plugin.api.isSummarizationCompatible
 )
 class Settings(val project: Project) : PersistentStateComponent<Settings.State> {
     data class State(
+        var sourceRootHistory: MutableList<String> = mutableListOf(),
         var codegenLanguage: CodegenLanguage = CodegenLanguage.defaultItem,
         @OptionTag(converter = TestFrameworkConverter::class)
         var testFramework: TestFramework = TestFramework.defaultItem,
@@ -65,6 +66,7 @@ class Settings(val project: Project) : PersistentStateComponent<Settings.State>
         var enableSummariesGeneration: Boolean = UtSettings.enableSummariesGeneration
     ) {
         constructor(model: GenerateTestsModel) : this(
+            sourceRootHistory = model.sourceRootHistory,
             codegenLanguage = model.codegenLanguage,
             testFramework = model.testFramework,
             mockStrategy = model.mockStrategy,
@@ -88,6 +90,7 @@ class Settings(val project: Project) : PersistentStateComponent<Settings.State>
 
             other as State
 
+            if (sourceRootHistory != other.sourceRootHistory) return false
             if (codegenLanguage != other.codegenLanguage) return false
             if (testFramework != other.testFramework) return false
             if (mockStrategy != other.mockStrategy) return false
@@ -108,7 +111,8 @@ class Settings(val project: Project) : PersistentStateComponent<Settings.State>
             return true
         }
         override fun hashCode(): Int {
-            var result = codegenLanguage.hashCode()
+            var result = sourceRootHistory.hashCode()
+            result = 31 * result + codegenLanguage.hashCode()
             result = 31 * result + testFramework.hashCode()
             result = 31 * result + mockStrategy.hashCode()
             result = 31 * result + mockFramework.hashCode()
@@ -129,6 +133,7 @@ class Settings(val project: Project) : PersistentStateComponent<Settings.State>
     }
 
     private var state = State()
+    val sourceRootHistory: MutableList<String> get() = state.sourceRootHistory
 
     val codegenLanguage: CodegenLanguage get() = state.codegenLanguage
 

utbot-intellij/src/main/kotlin/org/utbot/intellij/plugin/ui/GenerateTestsDialogWindow.kt

@@ -519,6 +519,7 @@ class GenerateTestsDialogWindow(val model: GenerateTestsModel) : DialogWrapper(m
         } catch (ignored: ParseException) {
         }
         model.timeout = TimeUnit.SECONDS.toMillis(timeoutSpinner.number.toLong())
+        model.testSourceRoot?.apply { model.updateSourceRootHistory(this.toNioPath().toString()) }
 
         val settings = model.project.service<Settings>()
         with(settings) {

utbot-ui-commons/src/main/kotlin/org/utbot/intellij/plugin/models/BaseTestModel.kt

@@ -14,6 +14,7 @@ import org.utbot.intellij.plugin.ui.utils.isBuildWithGradle
 import org.utbot.intellij.plugin.ui.utils.suitableTestSourceRoots
 
 val PsiClass.packageName: String get() = this.containingFile.containingDirectory.getPackage()?.qualifiedName ?: ""
+const val HISTORY_LIMIT = 10
 
 open class BaseTestsModel(
     val project: Project,
@@ -27,6 +28,7 @@ open class BaseTestsModel(
 
     var testSourceRoot: VirtualFile? = null
     var testPackageName: String? = null
+    open var sourceRootHistory : MutableList<String> = mutableListOf()
     open lateinit var codegenLanguage: CodegenLanguage
 
     fun setSourceRootAndFindTestModule(newTestSourceRoot: VirtualFile?) {
@@ -50,8 +52,15 @@ open class BaseTestsModel(
 
     fun getAllTestSourceRoots() : MutableList<out ITestSourceRoot> {
         with(if (project.isBuildWithGradle) project.allModules() else potentialTestModules) {
-            return this.flatMap { it.suitableTestSourceRoots().toList() }.toMutableList()
+            return this.flatMap { it.suitableTestSourceRoots().toList() }.toMutableList().distinct().toMutableList()
         }
     }
 
+    fun updateSourceRootHistory(path: String) {
+        sourceRootHistory.apply {
+            remove(path)//Remove existing entry if any
+            add(path)//Add the most recent entry to the end to be brought first at sorting, see org.utbot.intellij.plugin.ui.utils.RootUtilsKt.getSortedTestRoots
+            while (size > HISTORY_LIMIT) removeFirst()
+        }
+    }
 }

utbot-ui-commons/src/main/kotlin/org/utbot/intellij/plugin/ui/components/TestFolderComboWithBrowseButton.kt

@@ -60,6 +60,7 @@ class TestFolderComboWithBrowseButton(private val model: BaseTestsModel) :
 
         val testRoots = getSortedTestRoots(
             model.getAllTestSourceRoots(),
+            model.sourceRootHistory,
             model.srcModule.rootManager.sourceRoots.map { file: VirtualFile -> file.toNioPath().toString() },
             model.codegenLanguage
         )

utbot-ui-commons/src/main/kotlin/org/utbot/intellij/plugin/ui/utils/RootUtils.kt

@@ -71,6 +71,7 @@ const val SRC_MAIN = "src/main/"
  */
 fun getSortedTestRoots(
     allTestRoots: MutableList<out ITestSourceRoot>,
+    sourceRootHistory: List<String>,
     moduleSourcePaths: List<String>,
     codegenLanguage: CodegenLanguage
 ): MutableList<ITestSourceRoot> {
@@ -88,6 +89,9 @@ fun getSortedTestRoots(
         }.thenByDescending {
             // Heuristics: dedicated test source root named 'utbot_tests' should go first
             it.dirName == dedicatedTestSourceRootName
+        }.thenByDescending {
+            // Recent used root should be handy too
+            sourceRootHistory.indexOf(it.dirPath)
         }.thenBy {
             // ABC-sorting
             it.dirPath

utbot-ui-commons/src/test/kotlin/org/utbot/intellij/plugin/ui/utils/RootUtilsTest.kt

@@ -56,7 +56,13 @@ internal class RootUtilsTest {
             "/UTBotJavaTest/utbot-framework/src/main/kotlin",
             "/UTBotJavaTest/utbot-framework/src/main/resources",
         )
-        val sortedTestRoots = getSortedTestRoots(allTestRoots, moduleSourcePaths, CodegenLanguage.JAVA)
+        val sortedTestRoots = getSortedTestRoots(
+            allTestRoots,
+            listOf("/UTBotJavaTest/utbot-core/src/test/java"),
+            moduleSourcePaths,
+            CodegenLanguage.JAVA
+        )
         Assertions.assertEquals("/UTBotJavaTest/utbot-framework/src/test/java", sortedTestRoots.first().toString())
+        Assertions.assertEquals("/UTBotJavaTest/utbot-core/src/test/java", sortedTestRoots[1].toString())
     }
 }