Add Emscripten build in Travis

.travis.yml

@@ -18,5 +18,7 @@ matrix:
   include:
     - rust: nightly
       env: CLIPPY=true
+    - rust: nightly
+      env: EMSCRIPTEN=true
 
 script: ./travis.sh

test_suite/tests/test_de.rs

@@ -156,8 +156,12 @@ macro_rules! declare_tests {
         )+
     };
 
-    ($($name:ident { $($value:expr => $tokens:expr,)+ })+) => {
+    ($(
+        $(#[$cfg:meta])*
+        $name:ident { $($value:expr => $tokens:expr,)+ }
+    )+) => {
         $(
+            $(#[$cfg])*
             #[test]
             fn $name() {
                 $(
@@ -260,6 +264,7 @@ declare_tests! {
         0f32 => &[Token::F32(0.)],
         0f64 => &[Token::F64(0.)],
     }
+    #[cfg(not(target_arch = "wasm32"))]
     test_small_int_to_128 {
         1i128 => &[Token::I8(1)],
         1i128 => &[Token::I16(1)],

test_suite/tests/test_ser.rs

@@ -618,6 +618,7 @@ fn test_enum_skipped() {
     );
 }
 
+#[cfg(not(target_arch = "wasm32"))]
 #[test]
 fn test_integer128() {
     assert_ser_tokens_error(&1i128, &[], "i128 is not supported");

test_suite/tests/test_value.rs

@@ -26,6 +26,7 @@ fn test_u32_to_enum() {
     assert_eq!(E::B, e);
 }
 
+#[cfg(not(target_arch = "wasm32"))]
 #[test]
 fn test_integer128() {
     let de_u128 = IntoDeserializer::<value::Error>::into_deserializer(1u128);

travis.sh

@@ -42,6 +42,22 @@ if [ -n "${CLIPPY}" ]; then
 
     cd "$DIR/test_suite/no_std"
     cargo clippy -- -Dclippy
+elif [ -n "${EMSCRIPTEN}" ]; then
+    CARGO_WEB_RELEASE=$(curl -L -s -H 'Accept: application/json' https://github.com/koute/cargo-web/releases/latest)
+    CARGO_WEB_VERSION=$(echo "${CARGO_WEB_RELEASE}" | sed -e 's/.*"tag_name":"\([^"]*\)".*/\1/')
+    CARGO_WEB_URL="https://github.com/koute/cargo-web/releases/download/${CARGO_WEB_VERSION}/cargo-web-x86_64-unknown-linux-gnu.gz"
+
+    mkdir -p ~/.cargo/bin
+    echo "Downloading cargo-web from: ${CARGO_WEB_URL}"
+    curl -L "${CARGO_WEB_URL}" | gzip -d > ~/.cargo/bin/cargo-web
+    chmod +x ~/.cargo/bin/cargo-web
+
+    # Install Node.js
+    nvm install 9
+
+    cd "$DIR/test_suite"
+    cargo web test --target=asmjs-unknown-emscripten --nodejs
+    cargo web test --target=wasm32-unknown-emscripten --nodejs
 else
     CHANNEL=nightly
     cd "$DIR"