Add minimal wasm-bindgen test crate

.travis.yml

@@ -142,6 +142,9 @@ matrix:
         - ./utils/ci/install_cargo_web.sh
         - cargo web prepare-emscripten
         - cargo web -V
+        - cargo list | grep install-update || cargo install -f cargo-update
+        - cargo install-update -i cargo-update wasm-bindgen-cli
+        - cargo install-update -i cargo-update wasm-pack
       addons:
         chrome: stable
       script:
@@ -154,6 +157,10 @@ matrix:
         #- cargo build --target wasm32-unknown-unknown # without any features
         - cargo build --target wasm32-unknown-unknown --features=wasm-bindgen
         - cargo web test --target wasm32-unknown-unknown --features=stdweb
+        - cargo build --manifest-path tests/wasm_bindgen/Cargo.toml --target wasm32-unknown-unknown
+        - wasm-bindgen --nodejs target/wasm32-unknown-unknown/debug/rand_wasm_bindgen_test.wasm --out-dir tests/wasm_bindgen/js
+        - node tests/wasm_bindgen/js/index.js
+        - wasm-pack test --node tests/wasm_bindgen
 
     - rust: nightly
       env: DESCRIPTION="cross-platform builder (doesn't run tests)"

Cargo.toml

@@ -42,6 +42,7 @@ members = [
     "rand_pcg",
     "rand_xorshift",
     "rand_xoshiro",
+    "tests/wasm_bindgen",
 ]
 
 [dependencies]

tests/wasm_bindgen/Cargo.toml

@@ -0,0 +1,15 @@
+[package]
+name = "rand_wasm_bindgen_test"
+description = "Minimal crate to test that rand can be build for web assembly target"
+version = "0.1.0"
+authors = ["The Rand Project Developers"]
+publish = false
+license = "MIT/Apache-2.0"
+
+[lib]
+crate-type = ["cdylib"]
+
+[dependencies]
+rand = { path = "../..", features = ["wasm-bindgen"] }
+wasm-bindgen = "0.2"
+wasm-bindgen-test = "0.2"

tests/wasm_bindgen/js/index.js

@@ -0,0 +1,7 @@
+'use strict';
+
+const rand_wasm_bindgen_test = require('./rand_wasm_bindgen_test');
+
+console.log(rand_wasm_bindgen_test.generate_from_entropy());
+console.log(rand_wasm_bindgen_test.generate_from_os_rand());
+console.log(rand_wasm_bindgen_test.generate_from_seed());

tests/wasm_bindgen/src/lib.rs

@@ -0,0 +1,42 @@
+extern crate rand;
+extern crate wasm_bindgen;
+extern crate wasm_bindgen_test;
+
+use rand::rngs::{OsRng, StdRng};
+use rand::FromEntropy;
+use rand::{Rng, SeedableRng};
+use wasm_bindgen::prelude::*;
+
+#[wasm_bindgen]
+pub fn generate_from_seed(seed: u32) -> i32 {
+    StdRng::seed_from_u64(seed as u64).gen()
+}
+
+#[wasm_bindgen]
+pub fn generate_from_os_rand() -> i32 {
+    OsRng::new().unwrap().gen()
+}
+
+#[wasm_bindgen]
+pub fn generate_from_entropy() -> i32 {
+    StdRng::from_entropy().gen()
+}
+
+pub mod tests {
+    use wasm_bindgen_test::*;
+
+    #[wasm_bindgen_test]
+    fn generate_from_seed() {
+        let _ = super::generate_from_seed(42);
+    }
+
+    #[wasm_bindgen_test]
+    fn generate_from_os_rand() {
+        let _ = super::generate_from_os_rand();
+    }
+
+    #[wasm_bindgen_test]
+    fn generate_from_entropy() {
+        let _ = super::generate_from_entropy();
+    }
+}