wasm-bindgen/tests/api.rs

extern crate test_support;

#[test]
fn works() {
    test_support::project()
        .file("src/lib.rs", r#"
            #![feature(proc_macro)]

            extern crate wasm_bindgen;

            use wasm_bindgen::prelude::*;

            #[wasm_bindgen]
            #[no_mangle]
            pub extern fn foo() -> JsValue {
                JsValue::from("foo")
            }

            #[wasm_bindgen]
            #[no_mangle]
            pub extern fn bar(s: &str) -> JsValue {
                JsValue::from(s)
            }

            #[wasm_bindgen]
            #[no_mangle]
            pub extern fn baz() -> JsValue {
                JsValue::from(1.0)
            }

            #[wasm_bindgen]
            #[no_mangle]
            pub extern fn baz2(a: &JsValue, b: &JsValue) {
                assert_eq!(a.as_f64(), Some(2.0));
                assert_eq!(b.as_f64(), None);
            }

            #[wasm_bindgen]
            #[no_mangle]
            pub extern fn js_null() -> JsValue {
                JsValue::null()
            }

            #[wasm_bindgen]
            #[no_mangle]
            pub extern fn js_undefined() -> JsValue {
                JsValue::undefined()
            }

            #[wasm_bindgen]
            #[no_mangle]
            pub extern fn test_is_null_undefined(
                a: &JsValue,
                b: &JsValue,
                c: &JsValue,
            ) {
                assert!(a.is_null());
                assert!(!a.is_undefined());

                assert!(!b.is_null());
                assert!(b.is_undefined());

                assert!(!c.is_null());
                assert!(!c.is_undefined());
            }

            #[wasm_bindgen]
            #[no_mangle]
            pub extern fn get_true() -> JsValue {
                JsValue::from(true)
            }

            #[wasm_bindgen]
            #[no_mangle]
            pub extern fn get_false() -> JsValue {
                JsValue::from(false)
            }

            #[wasm_bindgen]
            #[no_mangle]
            pub extern fn test_bool(
                a: &JsValue,
                b: &JsValue,
                c: &JsValue,
            ) {
                assert_eq!(a.as_bool(), Some(true));
                assert_eq!(b.as_bool(), Some(false));
                assert_eq!(c.as_bool(), None);
            }

            #[wasm_bindgen]
            #[no_mangle]
            pub extern fn mk_symbol() -> JsValue {
                let a = JsValue::symbol(None);
                assert!(a.is_symbol());
                return a
            }

            #[wasm_bindgen]
            #[no_mangle]
            pub extern fn mk_symbol2(s: &str) -> JsValue {
                let a = JsValue::symbol(Some(s));
                assert!(a.is_symbol());
                return a
            }

            #[wasm_bindgen]
            #[no_mangle]
            pub extern fn assert_symbols(a: &JsValue, b: &JsValue) {
                assert!(a.is_symbol());
                assert!(!b.is_symbol());
            }

            #[wasm_bindgen]
            #[no_mangle]
            pub extern fn acquire_string(a: &JsValue, b: &JsValue) {
                assert_eq!(a.as_string().unwrap(), "foo");
                assert_eq!(b.as_string(), None);
            }

            #[wasm_bindgen]
            #[no_mangle]
            pub extern fn acquire_string2(a: &JsValue) -> String {
                a.as_string().unwrap_or("wrong".to_string())
            }
        "#)
        .file("test.ts", r#"
            import * as assert from "assert";
            import * as wasm from "./out";

            export function test() {
                assert.strictEqual(wasm.foo(), 'foo');
                assert.strictEqual(wasm.bar('a'), 'a');
                assert.strictEqual(wasm.baz(), 1);
                wasm.baz2(2, 'a');

                assert.strictEqual(wasm.js_null(), null);
                assert.strictEqual(wasm.js_undefined(), undefined);

                wasm.test_is_null_undefined(null, undefined, 1.0);

                assert.strictEqual(wasm.get_true(), true);
                assert.strictEqual(wasm.get_false(), false);
                wasm.test_bool(true, false, 1.0);

                assert.strictEqual(typeof(wasm.mk_symbol()), 'symbol');
                assert.strictEqual(typeof(wasm.mk_symbol2('a')), 'symbol');
                assert.strictEqual((Symbol as any).keyFor(wasm.mk_symbol()), undefined);
                assert.strictEqual((Symbol as any).keyFor(wasm.mk_symbol2('b')), undefined);

                wasm.assert_symbols((Symbol as any)(), 'a');
                wasm.acquire_string('foo', null)
                assert.strictEqual(wasm.acquire_string2(''), '');
                assert.strictEqual(wasm.acquire_string2('a'), 'a');
            }
        "#)
        .test();
}