[K/JS] Exclude kotlinx.serialization synthetic declarations from JsExport

^KT-57024 Fixed

plugins/kotlinx-serialization/testData/boxIr/excludedFromExport.kt

@@ -0,0 +1,47 @@
+// WITH_STDLIB
+// TARGET_BACKEND: JS_IR
+// TARGET_BACKEND: JS_IR_ES6
+// RUN_PLAIN_BOX_FUNCTION
+// INFER_MAIN_MODULE
+
+// MODULE: lib
+// FILE: lib.kt
+
+import kotlinx.serialization.*
+import kotlinx.serialization.json.*
+import kotlinx.serialization.descriptors.*
+
+@JsExport
+@Serializable
+class Basic(val name: String, val age: UInt)
+
+@JsExport
+@Serializable
+class WithCompanion(val name: String, val age: UInt) {
+    companion object {
+        fun foo() = "Test"
+    }
+}
+
+// FILE: test.js
+function box() {
+    const { Basic, WithCompanion } = this.lib;
+
+    if (Basic.Companion === undefined) return "fail: Unfortunatly we can't exclude the companion from export because it would break logic of other plugins";
+
+    const basic = new Basic("Test", 44);
+
+    if (basic.name !== "Test") return "fail: something wrong with a simple string field access";
+    if (basic.age !== 44) return "fail: something wrong with a simple uint field access";
+
+    if (WithCompanion.Companion === undefined) return "fail: User defined companion should be exported";
+    if (WithCompanion.Companion.serializer !== undefined) return "fail: serializer fabric should not be exported";
+
+    const withCompanion = new WithCompanion("Test", 44);
+
+    if (withCompanion.name !== "Test") return "fail: something wrong with a simple string field access";
+    if (withCompanion.age !== 44) return "fail: something wrong with a simple uint field access";
+    if (WithCompanion.Companion.foo() !== "Test") return "fail: something wrong with user defined function inside companion"
+
+    return "OK"
+}

plugins/kotlinx-serialization/testData/boxIr/excludedFromFileExport.kt

@@ -0,0 +1,51 @@
+// WITH_STDLIB
+// TARGET_BACKEND: JS_IR
+// TARGET_BACKEND: JS_IR_ES6
+// RUN_PLAIN_BOX_FUNCTION
+// INFER_MAIN_MODULE
+
+// MODULE: lib
+// FILE: lib.kt
+@file:JsExport
+
+import kotlinx.serialization.*
+import kotlinx.serialization.json.*
+import kotlinx.serialization.descriptors.*
+
+@Serializable
+class Basic(val name: String, val age: UInt)
+
+@Serializable
+class WithCompanion(val name: String, val age: UInt) {
+    companion object {
+        fun foo() = "Test"
+    }
+}
+
+// FILE: test.js
+function box() {
+    const pkg = this.lib;
+    const exportedDeclarationNames = Object.keys(pkg);
+
+    if (exportedDeclarationNames.length != 2) return "fail: expect to have only 'Basic' and 'WithComapnion' names, but got: " + exportedDeclarationNames.join(", ")
+
+    const { Basic, WithCompanion } = pkg;
+
+    if (Basic.Companion === undefined) return "fail: Unfortunatly we can't exclude the companion from export because it would break logic of other plugins";
+
+    const basic = new Basic("Test", 44);
+
+    if (basic.name !== "Test") return "fail: something wrong with a simple string field access";
+    if (basic.age !== 44) return "fail: something wrong with a simple uint field access";
+
+    if (WithCompanion.Companion === undefined) return "fail: User defined companion should be exported";
+    if (WithCompanion.Companion.serializer !== undefined) return "fail: serializer fabric should not be exported";
+
+    const withCompanion = new WithCompanion("Test", 44);
+
+    if (withCompanion.name !== "Test") return "fail: something wrong with a simple string field access";
+    if (withCompanion.age !== 44) return "fail: something wrong with a simple uint field access";
+    if (WithCompanion.Companion.foo() !== "Test") return "fail: something wrong with user defined function inside companion"
+
+    return "OK"
+}

plugins/kotlinx-serialization/testData/boxIr/serialInfo.kt

@@ -1,3 +1,4 @@
+// TARGET_BACKEND: JVM_IR
 // WITH_STDLIB
 
 import kotlinx.serialization.*

plugins/kotlinx-serialization/testData/diagnostics/Transients.txt

@@ -33,3 +33,4 @@ package
         public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
     }
 }
+