wasm-bindgen 0.1.0

Easy support for interacting between JS and Rust.
Documentation 
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extern crate test_support;

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

            extern crate wasm_bindgen;

            use wasm_bindgen::prelude::*;

            #[wasm_bindgen]
            pub fn add(a: u32, b: u32) -> u32 {
                a + b
            }

            #[wasm_bindgen]
            pub fn add3(a: u32) -> u32 {
                a + 3
            }

            #[wasm_bindgen]
            pub fn get2(_b: bool) -> u32 {
                2
            }

            #[wasm_bindgen]
            pub fn return_and_take_bool(a: bool, b: bool) -> bool {
                a && b
            }

            #[wasm_bindgen]
            pub fn raw_pointers_work(a: *mut u32, b: *const u8) -> *const u32 {
                unsafe {
                    (*a) = (*b) as u32;
                    return a
                }
            }
        "#)
        .file("test.ts", r#"
            import * as assert from "assert";
            import * as wasm from "./out";

            export function test() {
                assert.strictEqual(wasm.add(1, 2), 3);
                assert.strictEqual(wasm.add(2, 3), 5);
                assert.strictEqual(wasm.add3(2), 5);
                assert.strictEqual(wasm.get2(true), 2);
                assert.strictEqual(wasm.return_and_take_bool(true, false), false);
            }
        "#)
        .test();
}

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

            extern crate wasm_bindgen;

            use wasm_bindgen::prelude::*;

            #[wasm_bindgen]
            pub fn assert_foo_and_bar(a: &str, b: &str) {
                assert_eq!(a, "foo2");
                assert_eq!(b, "bar");
            }

            #[wasm_bindgen]
            pub fn assert_foo(a: &str) {
                assert_eq!(a, "foo");
            }
        "#)
        .file("test.ts", r#"
            import * as wasm from "./out";

            export function test() {
                wasm.assert_foo("foo");
                wasm.assert_foo_and_bar("foo2", "bar");
            }
        "#)
        .test();
}

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

            extern crate wasm_bindgen;

            use wasm_bindgen::prelude::*;

            #[wasm_bindgen]
            pub fn clone(a: &str) -> String {
                a.to_string()
            }

            #[wasm_bindgen]
            pub fn concat(a: &str, b: &str, c: i8) -> String {
                format!("{} {} {}", a, b, c)
            }
        "#)
        .file("test.ts", r#"
            import * as assert from "assert";
            import * as wasm from "./out";

            export function test() {
                assert.strictEqual(wasm.clone("foo"), "foo");
                assert.strictEqual(wasm.clone("another"), "another");
                assert.strictEqual(wasm.concat("a", "b", 3), "a b 3");
                assert.strictEqual(wasm.concat("c", "d", -2), "c d -2");
            }
        "#)
        .test();
}

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

            extern crate wasm_bindgen;

            use wasm_bindgen::prelude::*;

            #[wasm_bindgen]
            pub fn foo(_a: u32) {}

            #[wasm_bindgen]
            pub fn bar(_a: &str) {}
        "#)
        .file("test.js", r#"
            import * as assert from "assert";
            import * as wasm from "./out";

            export function test() {
                assert.throws(() => wasm.foo('a'), /expected a number argument/);
                assert.throws(() => wasm.bar(3), /expected a string argument/);
            }
        "#)
        .file("test.d.ts", r#"
            export function test(): void;
        "#)
        .test();
}

// #[test]
// fn other_imports() {
//     test_support::project()
//         .file("src/lib.rs", r#"
//             #![feature(proc_macro)]
//
//             extern crate wasm_bindgen;
//
//             use wasm_bindgen::prelude::*;
//
//             extern {
//                 fn another_import(a: u32);
//             }
//
//             wasm_bindgen! {
//                 pub fn foo(a: u32) {
//                     unsafe { another_import(a); }
//                 }
//             }
//         "#)
//         .file("test.ts", r#"
//             import * as assert from "assert";
//             import * as wasm from "./out";
//
//             let ARG: number | null = null;
//
//             export function test() {
//                 wasm.foo(2);
//                 assert.strictEqual(ARG, 2);
//             }
//         "#)
//         .test();
// }

#[test]
fn other_exports() {
    test_support::project()
        .file("src/lib.rs", r#"
            #[no_mangle]
            pub extern fn foo(_a: u32) {
            }
        "#)
        .file("test.ts", r#"
            import * as wasm from "./out_bg";

            export function test() {
                wasm.foo(2);
            }
        "#)
        .test();
}