Implement bytes.__mul__ and __rmul__

Author: sapir

tests/snippets/bytes.py

@@ -588,3 +588,12 @@
     b"they're bill's friends from the UK".title()
     == b"They'Re Bill'S Friends From The Uk"
 )
+
+
+# repeat by multiply
+a = b'abcd'
+assert a * 0 == b''
+assert a * -1 == b''
+assert a * 1 == b'abcd'
+assert a * 3 == b'abcdabcdabcd'
+assert 3 * a == b'abcdabcdabcd'

vm/src/obj/objbytes.rs

@@ -403,6 +403,16 @@ impl PyBytesRef {
     fn title(self, vm: &VirtualMachine) -> PyResult {
         Ok(vm.ctx.new_bytes(self.inner.title()))
     }
+
+    #[pymethod(name = "__mul__")]
+    fn repeat(self, n: PyIntRef, vm: &VirtualMachine) -> PyResult {
+        Ok(vm.ctx.new_bytes(self.inner.repeat(n, vm)?))
+    }
+
+    #[pymethod(name = "__rmul__")]
+    fn rmul(self, n: PyIntRef, vm: &VirtualMachine) -> PyResult {
+        self.repeat(n, vm)
+    }
 }
 
 #[pyclass]