Merge pull request RustPython#2357 from hyperbora/fix-memoryview-compare

coolreader18 · web-flow · commit 9b76dc38d800 · 2020-12-13T19:32:14.000-06:00
fix memoryview compare
diff --git a/Lib/test/test_memoryview.py b/Lib/test/test_memoryview.py
@@ -150,8 +150,6 @@ def test_tolist(self):
             l = m.tolist()
             self.assertEqual(l, list(b"abcdef"))
 
-    # TODO: RUSTPYTHON
-    @unittest.expectedFailure
     def test_compare(self):
         # memoryviews can compare for equality with other objects
         # having the buffer interface.
diff --git a/vm/src/builtins/bytes.rs b/vm/src/builtins/bytes.rs
@@ -531,6 +531,16 @@ impl Comparable for PyBytes {
     ) -> PyResult<PyComparisonValue> {
         Ok(if let Some(res) = op.identical_optimization(zelf, other) {
             res.into()
+        } else if other.isinstance(&vm.ctx.types.memoryview_type)
+            && op != PyComparisonOp::Eq
+            && op != PyComparisonOp::Ne
+        {
+            return Err(vm.new_type_error(format!(
+                "'{}' not supported between instances of '{}' and '{}'",
+                op.operator_token(),
+                zelf.class().name,
+                other.class().name
+            )));
         } else {
             zelf.inner.cmp(other, op, vm)
         })
diff --git a/vm/src/builtins/memory.rs b/vm/src/builtins/memory.rs
@@ -711,7 +711,10 @@ impl PyMemoryView {
             return Ok(false);
         }
 
-        let other = try_buffer_from_object(vm, other)?;
+        let other = match try_buffer_from_object(vm, other) {
+            Ok(buf) => buf,
+            Err(_) => return Ok(false),
+        };
 
         let a_options = &zelf.options;
         let b_options = other.get_options();
