add tests

.github/workflows/tests.yml

@@ -0,0 +1,44 @@
+name: Tests
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  tests:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Probe runner package cache
+        uses: awalsh128/cache-apt-pkgs-action@latest
+        with:
+          packages: imagemagick cargo
+          version: 1.0
+
+      - name: Install oxipng from crates.io
+        uses: baptiste0928/[email protected]
+        with:
+          crate: oxipng
+
+      - name: Install just from crates.io
+        uses: baptiste0928/[email protected]
+        with:
+          crate: just
+
+      - name: Install typst-test from github
+        uses: baptiste0928/[email protected]
+        with:
+          crate: typst-test
+          git: https://github.com/tingerrr/typst-test.git
+          tag: ci-semi-stable
+
+      - name: Setup typst
+        uses: yusancky/setup-typst@v2
+        with:
+          version: 'v0.11.0'
+
+      - name: Run test suite
+        run: just ci