Add tests for dependency detection

tests/test_assets.py

@@ -1,4 +1,4 @@
-"""Tests for Shinlyive assets."""
+"""Tests for Shinylive assets."""
 
 import os
 

tests/test_deps.py

@@ -0,0 +1,75 @@
+"""Tests for Shinylive dependency detection."""
+
+import pytest
+
+import shinylive._deps
+
+
+def test_requirements_txt():
+    from shinylive._deps import _find_packages_in_requirements
+
+    requirements_txt = """
+    typing_extensions
+    jsonschema-specifications (<1.0)
+    # comment
+    """
+
+    # This should convert '_' to '-', and remove the version constraints.
+    assert _find_packages_in_requirements(requirements_txt) == [
+        "typing-extensions",
+        "jsonschema-specifications",
+    ]
+
+    # Should preserve case here (in other steps it will be lowercased).
+    assert _find_packages_in_requirements("Jinja2") == ["Jinja2"]
+    assert _find_packages_in_requirements("jinja2") == ["jinja2"]
+
+
+def test_module_to_package_key():
+    from shinylive._deps import module_to_package_key
+
+    assert module_to_package_key("cv2") == "opencv-python"
+    assert module_to_package_key("black") == "black"
+    assert module_to_package_key("foobar") == None
+
+
+def test_dep_name_to_dep_key():
+    from shinylive._deps import dep_name_to_dep_key
+
+    assert dep_name_to_dep_key("black") == "black"
+    assert dep_name_to_dep_key("typing-extensions") == "typing-extensions"
+    assert (
+        dep_name_to_dep_key("jsonschema_specifications-tests")
+        == "jsonschema-specifications-tests"
+    )
+
+    # Should not convert `_` to `-`
+    assert dep_name_to_dep_key("typing_extensions") == None
+
+    # Should be case insensitive to input.
+    assert dep_name_to_dep_key("Jinja2") == "jinja2"
+    assert dep_name_to_dep_key("JiNJa2") == "jinja2"
+
+    assert dep_name_to_dep_key("cv2") == None
+
+
+def test_find_recursive_deps():
+    from shinylive._deps import _find_recursive_deps
+
+    # It is possible that these dependencies will change in future versions of Pyodide,
+    # but the reason we're testing jsonschema specifically is because it includes
+    # jsonschema_specifications, which is the package name (and not the key).
+    assert sorted(_find_recursive_deps(["jsonschema"])) == [
+        "attrs",
+        "jsonschema",
+        "jsonschema_specifications",
+        "pyrsistent",
+        "referencing",
+        "rpds-py",
+        "six",
+    ]
+
+    assert sorted(_find_recursive_deps(["opencv-python"])) == [
+        "numpy",
+        "opencv-python",
+    ]