[AA] implement KtFirSimpleNameReference.getImportAlias

^ KT-62980 fixed

Merge-request: KT-MR-12786
Merged-by: Anna Kozlova <Anna.Kozlova@jetbrains.com>

analysis/analysis-api-impl-base/tests/org/jetbrains/kotlin/analysis/api/impl/base/test/cases/references/AbstractReferenceImportAliasTest.kt

@@ -0,0 +1,39 @@
+/*
+ * Copyright 2010-2023 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.analysis.api.impl.base.test.cases.references
+
+import org.jetbrains.kotlin.analysis.test.framework.base.AbstractAnalysisApiBasedSingleModuleTest
+import org.jetbrains.kotlin.analysis.test.framework.services.expressionMarkerProvider
+import org.jetbrains.kotlin.idea.references.mainReference
+import org.jetbrains.kotlin.psi.KtFile
+import org.jetbrains.kotlin.psi.KtSimpleNameExpression
+import org.jetbrains.kotlin.test.builders.TestConfigurationBuilder
+import org.jetbrains.kotlin.test.directives.model.SimpleDirectivesContainer
+import org.jetbrains.kotlin.test.model.TestModule
+import org.jetbrains.kotlin.test.services.TestServices
+import org.jetbrains.kotlin.test.services.assertions
+
+abstract class AbstractReferenceImportAliasTest : AbstractAnalysisApiBasedSingleModuleTest() {
+    override fun configureTest(builder: TestConfigurationBuilder) {
+        super.configureTest(builder)
+        with(builder) {
+            useDirectives(Directives)
+        }
+    }
+
+    override fun doTestByFileStructure(ktFiles: List<KtFile>, module: TestModule, testServices: TestServices) {
+        val element = testServices.expressionMarkerProvider.getElementOfTypeAtCaret<KtSimpleNameExpression>(ktFiles.first())
+        val alias = element.mainReference.getImportAlias()
+        val expectedAlias = module.directives[Directives.TYPE_ALIAS].joinToString(" ")
+        testServices.assertions.assertEquals(expectedAlias, alias?.text)
+    }
+
+    private object Directives : SimpleDirectivesContainer() {
+        val TYPE_ALIAS by stringDirective(
+            description = "Type alias for selected reference"
+        )
+    }
+}