fix #88 fix #90 plugin with autocompletion

lynglib/src/jvmTest/kotlin/net/sergeych/lyng/miniast/CompletionEngineLightTest.kt

@@ -79,6 +79,51 @@ class CompletionEngineLightTest {
         assertFalse(ns.contains("Path"))
     }
 
+    @Test
+    fun stringLiteral_re_hasReturnTypeRegex() = runBlocking {
+        TestDocsBootstrap.ensure("lyng.stdlib")
+        val code = """
+            import lyng.stdlib
+
+            val s = "abc".<caret>
+        """.trimIndent()
+        val items = CompletionEngineLight.completeAtMarkerSuspend(code)
+        val reItem = items.firstOrNull { it.name == "re" }
+        assertTrue(reItem != null, "Expected to find 're' in String members, got: ${items.map { it.name }}")
+        // Type text should contain ": Regex"
+        assertTrue(reItem!!.typeText?.contains("Regex") == true, "Expected type text to contain 'Regex', was: ${reItem.typeText}")
+    }
+
+    @Test
+    fun stringLiteral_parenthesized_re_hasReturnTypeRegex() = runBlocking {
+        TestDocsBootstrap.ensure("lyng.stdlib")
+        val code = """
+            // No imports on purpose; stdlib must still be available
+
+            val s = ("abc").<caret>
+        """.trimIndent()
+        val items = CompletionEngineLight.completeAtMarkerSuspend(code)
+        val names = items.map { it.name }
+        assertTrue(names.isNotEmpty(), "Expected String members for parenthesized literal, got empty list")
+        val reItem = items.firstOrNull { it.name == "re" }
+        assertTrue(reItem != null, "Expected to find 're' for parenthesized String literal, got: $names")
+        assertTrue(reItem!!.typeText?.contains("Regex") == true, "Expected ': Regex' for re(), was: ${reItem.typeText}")
+    }
+
+    @Test
+    fun stringLiteral_noImports_stillHasStringMembers() = runBlocking {
+        TestDocsBootstrap.ensure("lyng.stdlib")
+        val code = """
+            val s = "super".<caret>
+        """.trimIndent()
+        val items = CompletionEngineLight.completeAtMarkerSuspend(code)
+        val names = items.map { it.name }
+        assertTrue(names.isNotEmpty(), "Expected String members without explicit imports, got empty list")
+        val reItem = items.firstOrNull { it.name == "re" }
+        assertTrue(reItem != null, "Expected to find 're' without explicit imports, got: $names")
+        assertTrue(reItem!!.typeText?.contains("Regex") == true, "Expected ': Regex' for re() without imports, was: ${reItem.typeText}")
+    }
+
     @Test
     fun shebang_and_fs_import_iterator_after_lines() = runBlocking {
         TestDocsBootstrap.ensure("lyng.stdlib", "lyng.io.fs")