test: Emscripten build and test on GitHub Actions

.github/workflows/emscripten.yml

@@ -0,0 +1,68 @@
+name: Emscripten build and test
+
+on:
+  workflow_dispatch:
+  pull_request:
+  push:
+    branches: [main]
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: 3.11
+
+      - name: Install pyodide-build
+        run: |
+          pip install pyodide-build
+          echo EMSCRIPTEN_VERSION=$(pyodide config get emscripten_version) >> $GITHUB_ENV
+
+      - name: Setup Emscripten
+        uses: mymindstorm/setup-emsdk@v12
+        with:
+          version: ${{ env.EMSCRIPTEN_VERSION }}
+
+      - name: Build
+        run: pyodide build
+
+      - name: Setup node
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+
+      # clone awkward and build a wheel, copy the wheel
+      - name: Awkward wheel
+        run: |
+          git clone https://github.com/scikit-hep/awkward.git
+          cd awkward
+          git checkout main
+          git submodule update --init --recursive
+          pyodide build
+          mv dist/*.whl ../dist
+
+      - name: Set up Pyodide virtual environment
+        run: |
+          pyodide venv .venv-pyodide
+          source .venv-pyodide/bin/activate
+          # python -m pip install .[test]
+          python -m pip install pytest
+          ls -l dist
+          python -m pip install dist/*.whl
+          python -c "import sys; print(sys.platform)"
+
+      - name: Test
+        run: |
+          source .venv-pyodide/bin/activate
+          python -m pytest -vv tests -m emscripten --reruns 3 --reruns-delay 30 --only-rerun "(?i)http|timeout|connection"

pyproject.toml

@@ -33,7 +33,7 @@ classifiers = [
   "Topic :: Utilities"
 ]
 dependencies = [
-  "awkward>=2.4.6",
+  "awkward>=2.5.0",
   "importlib-metadata;python_version<\"3.8\"",
   "numpy",
   "packaging",
@@ -94,7 +94,8 @@ log_cli_level = "info"
 markers = [
   "slow",
   "network",
-  "xrootd"
+  "xrootd",
+  "emscripten"
 ]
 minversion = "6.0"
 testpaths = ["tests"]

tests/test_0014-all-ttree-versions.py

@@ -1,16 +1,14 @@
 # BSD 3-Clause License; see https://github.com/scikit-hep/uproot5/blob/main/LICENSE
 
-import json
-import sys
 from io import StringIO
 
-import numpy
 import pytest
 import skhep_testdata
 
 import uproot
 
 
+@pytest.mark.emscripten
 def test_streamerless_read():
     with uproot.open(
         skhep_testdata.data_path("uproot-sample-5.23.02-uncompressed.root")