[Wasm] Add box and stdlib tests in wasi mode

libraries/stdlib/wasm/js/build.gradle.kts

@@ -18,7 +18,7 @@ configureWasmStdLib(
     wasmTargetParameter = "wasm-js",
     wasmTargetAttribute = KotlinWasmTargetAttribute.js,
     targetDependentSources = targetDependentSources,
-    targetDependentTestSources = listOf("$rootDir/libraries/stdlib/wasm/testJs/"),
+    targetDependentTestSources = listOf("$rootDir/libraries/stdlib/wasm/js/test/"),
     kotlinTestDependencyName = ":kotlin-test:kotlin-test-wasm-js"
 ) { extensionBody ->
     kotlin(extensionBody)

libraries/stdlib/wasm/js/test/js/AsyncTest.kt

@@ -0,0 +1,67 @@
+/*
+ * 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 test.js
+
+import kotlin.js.*
+import kotlin.test.*
+
+internal fun jsAsyncFoo(): Promise<JsAny?> =
+    js("(async () => 'foo')()")
+
+internal fun jsFoo(): JsAny =
+    js("'foo'")
+
+var state: JsAny? = null
+
+class MyThrowable : Throwable()
+
+class AsyncTest {
+    @Test
+    fun test1(): Promise<JsAny?> {
+        var thenExecuted = false
+        val p = jsAsyncFoo().then { value ->
+            state = value
+            thenExecuted = true
+            null
+        }
+        assertFalse(thenExecuted)
+        return p
+    }
+
+    @Test
+    fun test2(): Promise<JsAny?> {
+        assertEquals(state, jsFoo())
+        var thenExecuted = false
+        val p = jsAsyncFoo().then {
+            assertEquals(state, jsFoo())
+            thenExecuted = true
+            null
+        }.then {
+            assertEquals(state, jsFoo())
+            thenExecuted = true
+            null
+        }
+        assertFalse(thenExecuted)
+        return p
+    }
+
+    @Test
+    fun testJsValueToThrowableOrNull1(): Promise<JsAny?> {
+        val p = jsAsyncFoo().then {
+            throw MyThrowable()
+        }.catch { e ->
+            assert(e.toThrowableOrNull() is MyThrowable)
+            null
+        }
+        return p
+    }
+
+    @Test
+    fun testJsValueToThrowableOrNull2() {
+        val e = MyThrowable()
+        assertEquals((e.toJsReference()).toThrowableOrNull(), e)
+    }
+}

libraries/stdlib/wasm/js/test/testUtils.kt

@@ -0,0 +1,8 @@
+/*
+ * 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 test
+
+public actual val TestPlatform.Companion.current: TestPlatform get() = TestPlatform.WasmJs

libraries/stdlib/wasm/js/test/unsafe/MemoryAllocationJsTest.kt

@@ -0,0 +1,18 @@
+package test.wasm.unsafe
+
+import kotlin.wasm.unsafe.*
+import kotlin.test.*
+
+private fun jsConcatStrings(a: String, b: String): String =
+    js("a + b")
+
+@OptIn(UnsafeWasmMemoryApi::class)
+class MemoryAllocationJsTest {
+    @Test
+    fun testJsIntropInsideAllocations() {
+        withScopedMemoryAllocator { allocator ->
+            assertEquals(jsConcatStrings("str1", "str2"), "str1str2")
+            allocator.allocate(10)
+        }
+    }
+}