Packaging improvements (#34)

* Use maturin for PEP 517 compliancy

* Removing relative import in __init__.py

* Bump version to 0.4.2

1 files changed, 61 insertions, 0 deletions

diff --git a/tests/test_metadata.py b/tests/test_metadata.py
new file mode 100644
index 0000000..1a0e6d8
--- /dev/null
+++ b/tests/test_metadata.py
@@ -0,0 +1,61 @@
+import re
+import sys
+
+import toml
+import adblock
+
+
+def get_version_value_cargo():
+    with open("Cargo.toml", encoding="utf-8") as f:
+        cargo_toml = toml.loads(f.read())
+    return cargo_toml["package"]["version"]
+
+
+def get_version_value_changelog():
+    """
+    Try to get the names of all classes that we added to the Python module
+    from Rust. As always, we unfortunately don't have access to the Rust AST
+    so we have to make do with regular expressions.
+    """
+    versions = []
+    with open("CHANGELOG.md", "r", encoding="utf-8") as f:
+        for line in f:
+            match = re.match(
+                r"## ([0-9]+\.[0-9]+\.[0-9]+) - \(20[0-9]+-[0-1][0-9]-[0-3][0-9]\)",
+                line.strip(),
+            )
+            if match is not None:
+                versions.append(match.group(1))
+    assert versions == sorted(versions, reverse=True)
+    return versions[0]
+
+
+def test_version_numbers_all_same():
+    """
+    Makes sure that `Cargo.toml` and `CHANGELOG.md` contain the same version
+    number as the one attached to the `adblock` module.
+    """
+    cargo_version = get_version_value_cargo()
+    changelog_version = get_version_value_changelog()
+    module_version = adblock.__version__
+
+    assert cargo_version == module_version
+    assert module_version == changelog_version
+
+
+def get_current_python_version():
+    return f"{sys.version_info.major}.{sys.version_info.minor}.{sys.version_info.micro}"
+
+
+def test_required_python_version():
+    """
+    Make sure that the Python interpreter we're running this test suite on
+    falls into the required Python range.
+    """
+    with open("Cargo.toml", encoding="utf-8") as f:
+        cargo_toml = toml.loads(f.read())
+
+    required_python = cargo_toml["package"]["metadata"]["maturin"]["requires-python"]
+    assert required_python.startswith(">=")
+    required_python = required_python[2:]
+    assert get_current_python_version() >= required_python