add Validate ptr test

Author: Robert Masen

tests/all/main.rs

@@ -538,3 +538,4 @@ mod structural;
 mod u64;
 mod webidl;
 mod comments;
+mod validate_prt;

tests/all/validate_prt.rs

@@ -0,0 +1,69 @@
+use super::project;
+
+#[test]
+fn works() {
+    project()
+        .file("src/lib.rs", r#"
+            #![feature(proc_macro, wasm_custom_section, wasm_import_module)]
+            extern crate wasm_bindgen;
+            use wasm_bindgen::prelude::*;
+            #[wasm_bindgen]
+            pub struct Fruit {
+                name: String,
+            }
+            #[wasm_bindgen]
+            impl Fruit {
+                #[wasm_bindgen(method)]
+                pub fn name(&self) -> String {
+                    self.name.clone()
+                }
+                #[wasm_bindgen(constructor)]
+                pub fn new(name: String) -> Self {
+                    Fruit {
+                        name,
+                    }
+                }
+            }
+            #[wasm_bindgen]
+            pub fn eat(_fruit: Fruit) { }
+        "#)
+        .file("test.js", r#"
+            import * as wasm from './out';
+            const targetMessage = 'Attempt to use a moved value';
+            function assertEq(a, b) {
+                console.log(a, '?=', b);
+                if (a === b)
+                return;
+                throw new Error('not equal');
+            }
+            export function test() {
+                useMoved();
+                moveMoved();
+            }
+            export function useMoved() {
+                // create a new struct
+                let apple = new wasm.Fruit('apple');
+                // sanity check that this method works
+                let name = apple.name();
+                // consume the struct
+                wasm.eat(apple);
+                // try and use the moved apple again
+                try {
+                    let movedName = apple.name();
+                } catch (e) {
+                    assertEq(e.message, targetMessage);
+                }
+            }
+            export function moveMoved() {
+                let pear = new wasm.Fruit('pear');
+                let name = pear.name();
+                wasm.eat(pear);
+                try {
+                    wasm.eat(pear);
+                } catch (e) {
+                    assertEq(e.message, targetMessage);
+                }
+            }
+        "#)
+        .test();
+}