36 lines
1.3 KiB
Rust
36 lines
1.3 KiB
Rust
// Copyright 2019 The Chromium OS Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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use protobuf::Message;
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/// Asserts that a given protobuf message object can be serialized to bytes and
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/// read back into a value of the same type, preserving equality between the
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/// original object and the one read back.
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///
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/// This is helpful for confirming that proto files have been compiled
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/// successfully and are exposed as intended by the public API of the parent
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/// crate. It also lets us exercise the full set of methods we intend to use for
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/// building particular proto objects so that we notice breakage early in the
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/// event that a proto external to this repository would make a breaking change.
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///
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/// Note: assumes that the given `message` is not just `T::new` so that we can
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/// tell that deserialization has happened successfully.
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///
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/// # Example
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///
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/// ```ignore
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/// let mut request = SendCommandRequest::new();
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/// request.set_command(b"...".to_vec());
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/// test_round_trip(request);
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/// ```
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pub fn test_round_trip<T: Message + PartialEq>(message: T) {
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let serialized = message.write_to_bytes().unwrap();
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let mut back = T::new();
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assert_ne!(message, back);
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back.merge_from_bytes(&serialized).unwrap();
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assert_eq!(message, back);
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}
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