Add cross tests

.github/actions/cross-tests/action.yml

@@ -0,0 +1,32 @@
+name: "cross-tests"
+description: "tests for aarch64 & mips"
+
+inputs:
+  rust:
+    required: true
+  package:
+    required: true
+  target:
+    required: true
+  features:
+    required: true
+
+runs:
+  using: "composite"
+  steps:
+      - uses: actions/checkout@v1
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: ${{ inputs.rust }}
+          target: ${{ inputs.target }}
+          override: true
+      - name: Install precompiled cross
+        run: |
+          export URL=$(curl -s https://api.github.com/repos/rust-embedded/cross/releases/latest | jq -r '.assets[] | select(.name | contains("x86_64-unknown-linux-gnu.tar.gz")) | .browser_download_url')
+          wget -O /tmp/binaries.tar.gz $URL
+          tar -C /tmp -xzf /tmp/binaries.tar.gz
+          mv /tmp/cross ~/.cargo/bin
+        shell: bash
+      - run: cross test --no-default-features --package ${{ inputs.package }} --target ${{ inputs.target }} --features ${{ inputs.features }}
+        shell: bash

.github/workflows/sha3.yml

@@ -3,6 +3,7 @@ name: sha3
 on:
   pull_request:
     paths:
+      - ".github/workflows/sha3.yml"
       - "sha3/**"
       - "Cargo.*"
   push:
@@ -55,3 +56,30 @@ jobs:
       - run: cargo test --no-default-features
       - run: cargo test
       - run: cargo test --all-features
+
+  # Cross-compiled tests
+  cross:
+    strategy:
+      matrix:
+        rust:
+          - 1.41.0 # MSRV
+          - stable
+        target:
+          - aarch64-unknown-linux-gnu
+          - mips-unknown-linux-gnu
+        features:
+          - default
+
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+      # Cross mounts only current package, i.e. by default it ignores workspace's Cargo.toml
+        working-directory: .
+    steps:
+      - uses: actions/checkout@v1
+      - uses: ./.github/actions/cross-tests
+        with:
+          rust: ${{ matrix.rust }}
+          package: sha3
+          target: ${{ matrix.target }}
+          features: ${{ matrix.features }}