Add PySR integration test

.github/workflows/tests.yml

@@ -66,7 +66,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install flake8 pytest pytest-cov
+          pip install flake8 pytest pytest-cov virtualenv
           cp pysrc/juliacall/juliapkg-dev.json pysrc/juliacall/juliapkg.json
           pip install -e .
       - name: Lint with flake8

pytest/test_all.py

@@ -17,3 +17,52 @@ def test_issue_394():
     assert jl.f is f
     assert jl.y is y
     assert jl.seval("f(x)") == 4
+
+
+def test_integration_pysr():
+    "Integration tests for PySR"
+    import os
+    import platform
+    import subprocess
+    import sys
+    import tempfile
+
+    with tempfile.TemporaryDirectory() as tempdir:
+        subprocess.run([sys.executable, "-m", "virtualenv", tempdir], check=True)
+
+        virtualenv_path = os.path.join(
+            tempdir, "Scripts" if platform.system() == "Windows" else "bin"
+        )
+        virtualenv_executable = os.path.join(virtualenv_path, "python")
+
+        assert os.path.exists(virtualenv_executable)
+
+        # Install this package
+        subprocess.run([virtualenv_executable, "-m", "pip", "install", "."], check=True)
+        # Install PySR with no requirement on JuliaCall
+        subprocess.run(
+            [virtualenv_executable, "-m", "pip", "install", "--no-deps", "pysr"],
+            check=True,
+        )
+        # Install PySR test requirements
+        subprocess.run(
+            [
+                virtualenv_executable,
+                "-m",
+                "pip",
+                "install",
+                "sympy",
+                "pandas",
+                "scikit_learn",
+                "click",
+                "setuptools",
+                "typing_extensions",
+                "pytest",
+                "nbval",
+            ],
+            check=True,
+        )
+        # Run PySR main test suite
+        subprocess.run(
+            [virtualenv_executable, "-m", "pysr", "test", "main"], check=True
+        )