Shard rust canister tests

.github/workflows/canister-tests.yml

@@ -195,19 +195,12 @@ jobs:
 
   # Run the tests, user the output of the docker build as Wasm module
   # (note: this runs _all_ cargo tests)
-  canister-tests:
+  canister-tests-build:
     runs-on: ${{ matrix.os }}
-    needs: [docker-build-ii, docker-build-archive]
     strategy:
       matrix:
         os: [ ubuntu-latest, macos-latest ]
     steps:
-      # Required by the ic-test-state-machine
-      - name: Install openssl (macos)
-        if: ${{ matrix.os == 'macos-latest' }}
-        run: |
-          brew install openssl@3
-
       - uses: actions/checkout@v3
         with:
           # Pull a deep copy so that we can set meaningful timestamps across builds, based on the commit history
@@ -237,6 +230,9 @@ jobs:
           echo "now: $commit_now"
 
       - uses: ./.github/actions/bootstrap
+      - name: Install nextest
+        run: |
+          curl -LsSf https://get.nexte.st/latest/${{ matrix.os == 'macos-latest' && 'mac' || 'linux' }}  | tar zxf - -C ${CARGO_HOME:-~/.cargo}/bin
 
       # Rustup only installs cargo on the first call, so we use a dedicated step to get a good idea of how
       # time is spent in each step separately
@@ -326,11 +322,45 @@ jobs:
         run: rsync -av --compare-dest="/tmp/target-deps/" "$PWD/target/" "/tmp/target-canister/"
 
       # Build the tests
-      - name: Build
+      - name: Build test archive
         run: |
           git checkout ${{ steps.git_info.outputs.commit_now }}
-          cargo build --tests --release --frozen
+          cargo nextest archive --archive-file canister-tests-${{ matrix.os }}.tar.zst --release
+
+      - name: 'Upload canister test archive'
+        uses: actions/upload-artifact@v3
+        with:
+          # name is the name used to display and retrieve the artifact
+          name: canister-tests-${{ matrix.os }}.tar.zst
+          # path is the name used as the file to upload and the name of the
+          # downloaded file
+          path: ./canister-tests-${{ matrix.os }}.tar.zst
+
+  canister-tests-run:
+    runs-on: ${{ matrix.os }}
+    needs: [canister-tests-build, docker-build-ii, docker-build-archive]
+    strategy:
+      matrix:
+        os: [ ubuntu-latest, macos-latest ]
+        partition: ['1/3', '2/3', '3/3']
+    steps:
+      - uses: actions/checkout@v3
+
+      # Required by the ic-test-state-machine
+      - name: Install openssl (macos)
+        if: ${{ matrix.os == 'macos-latest' }}
+        run: |
+          brew install openssl@3
+
+      - name: Download nextest
+        run: |
+          curl -LsSf https://get.nexte.st/latest/${{ matrix.os == 'macos-latest' && 'mac' || 'linux' }}  | tar zxf -
 
+      - name: 'Download nextest test archive'
+        uses: actions/download-artifact@v3
+        with:
+          name: canister-tests-${{ matrix.os }}.tar.zst
+          path: .
       - name: Download ic-test-state-machine binary
         run: |
           uname_sys=$(uname -s | tr '[:upper:]' '[:lower:]')
@@ -362,7 +392,7 @@ jobs:
           # a relatively small price to pay to make sure PRs are always tested against the latest release.
           curl -sSL https://github.com/dfinity/internet-identity/releases/latest/download/internet_identity_test.wasm.gz -o internet_identity_previous.wasm.gz
           curl -sSL https://github.com/dfinity/internet-identity/releases/latest/download/archive.wasm.gz -o archive_previous.wasm.gz
-          cargo test --release
+          ./cargo-nextest nextest run --archive-file canister-tests-${{ matrix.os }}.tar.zst --partition hash:${{ matrix.partition }}
         env:
           RUST_BACKTRACE: 1