Merge pull request #242 from image-rs/testing-in-wasm

Testing in wasm

Author: HeroicKatora

.github/workflows/rust.yml

@@ -70,3 +70,29 @@ jobs:
         env:
           FEATURES: ${{ matrix.features }}
           CARGO_TARGET_AARCH64_UNKNOWN_LINUX_MUSL_LINKER: aarch64-linux-gnu-gcc
+  cross_compile_wasm:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Install node
+        run: |
+          sudo apt-get update
+          sudo apt-get install nodejs
+          node -v
+      - name: Install wasm-bindgen
+        run: >
+          curl -L "$WASMBINDGEN_UPSTREAM"
+          | tar xzf - --strip-components=1 wasm-bindgen-0.2.80-x86_64-unknown-linux-musl/wasm-bindgen-test-runner
+          && sudo mv wasm-bindgen-test-runner /usr/bin/wasm-bindgen-test-runner
+        env:
+          WASMBINDGEN_UPSTREAM: https://github.com/rustwasm/wasm-bindgen/releases/download/0.2.80/wasm-bindgen-0.2.80-x86_64-unknown-linux-musl.tar.gz
+      - name: Installing Rust toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          override: true
+          toolchain: stable
+          target: wasm32-unknown-unknown
+      - uses: actions/checkout@v2
+      - name: Test
+        run: cargo test -vv --target wasm32-unknown-unknown
+        env:
+          CARGO_TARGET_WASM32_UNKNOWN_UNKNOWN_RUNNER: wasm-bindgen-test-runner

Cargo.toml

@@ -18,6 +18,7 @@ rayon = { version = "1.5.1", optional = true }
 png = "0.16"
 walkdir = "2.0"
 criterion = "0.3"
+wasm-bindgen-test = "0.3"
 
 [features]
 default = ["rayon"]

tests/lib.rs

@@ -9,6 +9,27 @@ mod common;
 mod crashtest;
 mod reftest;
 
+#[test]
+#[wasm_bindgen_test::wasm_bindgen_test]
+fn included_file() {
+    const FILE: &[u8] = include_bytes!(concat!(env!("CARGO_MANIFEST_DIR"), "/tests/reftest/images/mozilla/jpg-progressive.jpg"));
+
+    let mut data = FILE;
+    let mut decoder = jpeg::Decoder::new(&mut data);
+    let ref_data = decoder.decode().unwrap();
+    let ref_info = decoder.info().unwrap();
+
+    let mut data = FILE;
+    decoder = jpeg::Decoder::new(&mut data);
+    decoder.read_info().unwrap();
+    let info = decoder.info().unwrap();
+    let data = decoder.decode().unwrap();
+
+    assert_eq!(info, decoder.info().unwrap());
+    assert_eq!(info, ref_info);
+    assert_eq!(data, ref_data);
+}
+
 #[test]
 fn read_info() {
     let path = Path::new("tests").join("reftest").join("images").join("mozilla").join("jpg-progressive.jpg");