mincode: add a basic test

Summary: Add a basic test to ensure mincode is somehow working.

Reviewed By: kulshrax

Differential Revision: D17087350

fbshipit-source-id: efa5d18e579688521e91fe28ee67f1d7f7c15558

lib/mincode/Cargo.toml

@@ -13,4 +13,5 @@ serde = "1.0"
 vlqencoding = { path = "../vlqencoding" }
 
 [dev-dependencies]
+quickcheck = "0.6"
 serde = { version = "1.0", features = ["derive"] }

lib/mincode/src/lib.rs

@@ -8,6 +8,9 @@ mod de;
 mod error;
 mod ser;
 
+#[cfg(test)]
+mod tests;
+
 use self::de::Deserializer;
 use self::ser::Serializer;
 use serde::{Deserialize, Serialize};

lib/mincode/src/tests.rs

@@ -0,0 +1,25 @@
+// Copyright (c) Facebook, Inc. and its affiliates.
+//
+// This software may be used and distributed according to the terms of the
+// GNU General Public License version 2.
+
+use quickcheck::quickcheck;
+use serde::{Deserialize, Serialize};
+
+#[derive(Serialize, Deserialize, PartialEq, Debug)]
+struct Foo {
+    bar: String,
+    baz: Option<(f64, i32, u8)>,
+    derp: bool,
+    list: Vec<u32>,
+}
+
+quickcheck! {
+    fn test_roundtrip(bar: String, baz: Option<(f64, i32, u8)>, derp: bool, list: Vec<u32>) -> bool {
+        let foo = Foo { bar, baz, derp, list };
+        let mut bytes = Vec::new();
+        crate::serialize(&mut bytes, &foo).unwrap();
+        let foo_deserialized: Foo = crate::deserialize(&bytes).unwrap();
+        foo == foo_deserialized
+    }
+}