chore: checkpoint before Python removal

vendor/encode_unicode/tests/exhaustive.rs

@@ -0,0 +1,35 @@
+/* Copyright 2018-2022 Torbjørn Birch Moltu
+ *
+ * Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+ * http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+ * http://opensource.org/licenses/MIT>, at your option. This file may not be
+ * copied, modified, or distributed except according to those terms.
+ */
+
+//! Tests that try all possible values for at least one parameter / byte / unit
+//! of the tested function.
+
+use core::char;
+extern crate encode_unicode;
+use encode_unicode::*;
+
+#[test]
+fn from_ascii() {
+    for cp in 0u32..256 {
+        assert_eq!(Utf8Char::from_ascii(cp as u8).is_ok(), cp & 0x80 == 0);
+        if let Ok(u8c) = Utf8Char::from_ascii(cp as u8) {
+            assert_eq!(u8c, Utf8Char::from(cp as u8 as char));
+        }
+    }
+}
+
+#[test]
+#[cfg_attr(miri, ignore)]
+fn from_bmp() {
+    for cp in 0u32..0x1_00_00 {
+        assert_eq!(
+            Utf16Char::from_bmp(cp as u16).ok(),
+            char::from_u32(cp).map(Utf16Char::from)
+        );
+    }
+}