chore: checkpoint before Python removal

vendor/sha1/tests/mod.rs

@@ -0,0 +1,15 @@
+use digest::dev::{feed_rand_16mib, fixed_reset_test};
+use hex_literal::hex;
+use sha1::{Digest, Sha1};
+
+digest::new_test!(sha1_main, "sha1", Sha1, fixed_reset_test);
+
+#[test]
+fn sha1_rand() {
+    let mut h = Sha1::new();
+    feed_rand_16mib(&mut h);
+    assert_eq!(
+        h.finalize()[..],
+        hex!("7e565a25a8b123e9881addbcedcd927b23377a78")[..]
+    );
+}