[Wasm] Add box and stdlib tests in wasi mode

wasm/wasm.tests/_commonFiles/asserts.kt

@@ -0,0 +1,45 @@
+package kotlin
+// This file should be excluded from tests using StdLib, as these methods conflict with corresponding methods from kotlin.test
+// see StdLibTestBase.removeAdHocAssertions
+
+fun <T> assertEquals(expected: T, actual: T, message: String? = null) {
+    if (expected != actual) {
+        val msg = if (message == null) "" else ", message = '$message'"
+        fail("Unexpected value: expected = '$expected', actual = '$actual'$msg")
+    }
+}
+
+fun <T> assertNotEquals(illegal: T, actual: T, message: String? = null) {
+    if (illegal == actual) {
+        val msg = if (message == null) "" else ", message = '$message'"
+        fail("Illegal value: illegal = '$illegal', actual = '$actual'$msg")
+    }
+}
+
+fun <T> assertSame(expected: T, actual: T, message: String? = null) {
+    if (expected !== actual) {
+        val msg = if (message == null) "" else ", message = '$message'"
+        fail("Expected same instances: expected = '$expected', actual = '$actual'$msg")
+    }
+}
+
+fun assertTrue(actual: Boolean, message: String? = null) = assertEquals(true, actual, message)
+
+fun assertFalse(actual: Boolean, message: String? = null) = assertEquals(false, actual, message)
+
+fun testTrue(f: () -> Boolean) {
+    assertTrue(f(), f.toString())
+}
+
+fun testFalse(f: () -> Boolean) {
+    assertFalse(f(), f.toString())
+}
+
+fun assertFails(block: () -> Unit): Throwable {
+    try {
+        block()
+    } catch (t: Throwable) {
+        return t
+    }
+    fail("Expected an exception to be thrown, but was completed successfully.")
+}