test(js) New WebAssembly.validate_with_invalid_input test case.

tests/all/js_globals/WebAssembly.rs

@@ -31,3 +31,38 @@ fn validate() {
         "#)
         .test()
 }
+
+#[test]
+fn validate_with_invalid_input() {
+    project()
+        .file("src/lib.rs", r#"
+            #![feature(proc_macro, wasm_custom_section)]
+
+            extern crate wasm_bindgen;
+            use JsValue;
+            use wasm_bindgen::prelude::*;
+            use wasm_bindgen::js::WebAssembly;
+
+            #[wasm_bindgen]
+            pub fn validate_wasm(wasm: JsValue) -> JsValue {
+                match WebAssembly::validate(wasm) {
+                    Ok(value) => value.into(),
+                    Err(err) => err
+                }
+            }
+        "#)
+        .file("test.js", r#"
+            import * as assert from "assert";
+            import * as wasm from "./out";
+
+            export function test() {
+                try {
+                    wasm.validate_wasm(42);
+                    assert.ok(false);
+                } catch (e) {
+                    assert.ok(true);
+                }
+            }
+        "#)
+        .test()
+}