chore: checkpoint before Python removal

vendor/idna/tests/tests.rs

@@ -0,0 +1,27 @@
+use tester as test;
+
+mod deprecated;
+mod punycode;
+mod uts46;
+
+fn main() {
+    let mut tests = Vec::new();
+    {
+        let mut add_test = |name, run| {
+            tests.push(test::TestDescAndFn {
+                desc: test::TestDesc {
+                    name: test::DynTestName(name),
+                    ignore: false,
+                    should_panic: test::ShouldPanic::No,
+                    allow_fail: false,
+                    test_type: test::TestType::Unknown,
+                },
+                testfn: run,
+            })
+        };
+        punycode::collect_tests(&mut add_test);
+        deprecated::collect_tests(&mut add_test);
+        uts46::collect_tests(&mut add_test);
+    }
+    test::test_main(&std::env::args().collect::<Vec<_>>(), tests, None)
+}