Add shuttle-tokio (#238)

* Add shuttle-tokio

Co-authored-by: Rajeev Joshi <jorajeev@amazon.com>
Co-authored-by: Bernhard Kragl <kraglb@amazon.com>

* Comment cleanup

* Make blog and rate_limiter tests compile

* Remove blog and rate limiter tests

* Clippies

* Address comments

---------

Co-authored-by: Rajeev Joshi <jorajeev@amazon.com>
Co-authored-by: Bernhard Kragl <kraglb@amazon.com>

Author: 3 people

Cargo.toml

@@ -4,6 +4,13 @@ members = [
     "wrappers/shuttle_rand_0.8",
     "wrappers/shuttle_sync",
     "wrappers/lazy_static",
+    "wrappers/tokio/impls/tokio",
+    "wrappers/tokio/impls/tokio-macros",
+    "wrappers/tokio/impls/tokio-stream",
+    "wrappers/tokio/impls/tokio-test",
+    "wrappers/tokio/impls/tokio-util",
+    "wrappers/tokio/wrappers/shuttle-tokio",
+    "wrappers/tokio/wrappers/shuttle-tokio-stream",
 ]
 
 resolver = "2"

wrappers/tokio/README.md

@@ -0,0 +1,25 @@
+# Shuttle support for `tokio`
+
+This folder contains the implementation and wrapper that enables testing of [tokio](https://crates.io/crates/tokio) applications with Shuttle.
+
+## How to use
+
+To use it, add the following in your Cargo.toml:
+
+```
+[features]
+shuttle = [
+   "tokio/shuttle",
+]
+
+[dependencies]
+tokio = { package = "shuttle-tokio", version = "VERSION_NUMBER" }
+```
+
+The code will then behave as before when the `shuttle` feature flag is not provided, and will run with Shuttle-compatible primitives when the `shuttle` feature flag is provided.
+
+## Limitations
+
+Shuttle's tokio support does not currently model all tokio functionality. Some parts of tokio have not been implemented or may not be modeled faithfully. Keep this in mind when using Shuttle with tokio, as you may encounter missing functionality that needs to be added. If you encounter missing features, please file an issue or, better yet, open a PR to contribute the functionality.
+
+The list of constructs not supported by Shuttle are in [Issue 241](https://github.com/awslabs/shuttle/issues/241)

wrappers/tokio/impls/tokio-macros/Cargo.toml

@@ -0,0 +1,19 @@
+[package]
+name = "shuttle-tokio-macros-impl"
+version = "0.1.0" # Forked from "2.2.0"
+edition = "2021"
+
+[lib]
+proc-macro = true
+
+[features]
+
+[dependencies]
+proc-macro2 = "1.0.60"
+quote = "1"
+syn = { version = "2.0", features = ["full"] }
+shuttle = { path = "../../../../shuttle" }
+proc-macro-crate = "3.1.0"
+
+[dev-dependencies]
+shuttle-tokio = { package = "shuttle-tokio-impl", path = "../tokio", version = "*" }

wrappers/tokio/impls/tokio-macros/LICENSE

@@ -0,0 +1,47 @@
+Copyright (c) 2023 Tokio Contributors
+
+Permission is hereby granted, free of charge, to any
+person obtaining a copy of this software and associated
+documentation files (the "Software"), to deal in the
+Software without restriction, including without
+limitation the rights to use, copy, modify, merge,
+publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software
+is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice
+shall be included in all copies or substantial portions
+of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
+ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
+TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
+SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
+IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.
+
+The MIT License (MIT)
+
+Copyright (c) 2019 Yoshua Wuyts
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.