1 files changed, 97 insertions, 0 deletions
diff --git a/third_party/rust/rkv/tests/multi-integer-store.rs b/third_party/rust/rkv/tests/multi-integer-store.rs
new file mode 100644
index 0000000000..204d52f93d
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+++ b/third_party/rust/rkv/tests/multi-integer-store.rs
@@ -0,0 +1,97 @@
+// Copyright 2018 Mozilla
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+// this file except in compliance with the License. You may obtain a copy of the
+// License at http://www.apache.org/licenses/LICENSE-2.0
+// Unless required by applicable law or agreed to in writing, software distributed
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+// CONDITIONS OF ANY KIND, either express or implied. See the License for the
+// specific language governing permissions and limitations under the License.
+#![cfg(all(feature = "db-dup-sort", feature = "db-int-key"))]
+#![allow(clippy::many_single_char_names)]
+
+use std::fs;
+
+use serde_derive::Serialize;
+use tempfile::Builder;
+
+use rkv::{
+    backend::Lmdb,
+    PrimitiveInt,
+    Rkv,
+    StoreOptions,
+    Value,
+};
+
+#[test]
+fn test_multi_integer_keys() {
+    let root = Builder::new().prefix("test_integer_keys").tempdir().expect("tempdir");
+    fs::create_dir_all(root.path()).expect("dir created");
+
+    let k = Rkv::new::<Lmdb>(root.path()).expect("new succeeded");
+    let s = k.open_multi_integer("s", StoreOptions::create()).expect("open");
+
+    macro_rules! test_integer_keys {
+        ($store:expr, $key:expr) => {{
+            let mut writer = k.write().expect("writer");
+
+            $store.put(&mut writer, $key, &Value::Str("hello1")).expect("write");
+            $store.put(&mut writer, $key, &Value::Str("hello2")).expect("write");
+            $store.put(&mut writer, $key, &Value::Str("hello3")).expect("write");
+            let vals = $store
+                .get(&writer, $key)
+                .expect("read")
+                .map(|result| result.expect("ok"))
+                .map(|(_, v)| v)
+                .collect::<Vec<Value>>();
+            assert_eq!(vals, vec![Value::Str("hello1"), Value::Str("hello2"), Value::Str("hello3")]);
+            writer.commit().expect("committed");
+
+            let reader = k.read().expect("reader");
+            let vals = $store
+                .get(&reader, $key)
+                .expect("read")
+                .map(|result| result.expect("ok"))
+                .map(|(_, v)| v)
+                .collect::<Vec<Value>>();
+            assert_eq!(vals, vec![Value::Str("hello1"), Value::Str("hello2"), Value::Str("hello3")]);
+        }};
+    }
+
+    // The integer module provides only the u32 integer key variant
+    // of IntegerStore, so we can use it without further ado.
+    test_integer_keys!(s, std::u32::MIN);
+    test_integer_keys!(s, std::u32::MAX);
+
+    // If you want to use another integer key variant, you need to implement
+    // a newtype, implement PrimitiveInt, and implement or derive Serialize
+    // for it.  Here we do so for the i32 type.
+
+    // DANGER!  Doing this enables you to open a store with multiple,
+    // different integer key types, which may result in unexpected behavior.
+    // Make sure you know what you're doing!
+
+    let t = k.open_multi_integer("s", StoreOptions::create()).expect("open");
+
+    #[derive(Serialize)]
+    struct I32(i32);
+    impl PrimitiveInt for I32 {}
+    test_integer_keys!(t, I32(std::i32::MIN));
+    test_integer_keys!(t, I32(std::i32::MAX));
+
+    let u = k.open_multi_integer("s", StoreOptions::create()).expect("open");
+
+    #[derive(Serialize)]
+    struct U16(u16);
+    impl PrimitiveInt for U16 {}
+    test_integer_keys!(u, U16(std::u16::MIN));
+    test_integer_keys!(u, U16(std::u16::MAX));
+
+    let v = k.open_multi_integer("s", StoreOptions::create()).expect("open");
+
+    #[derive(Serialize)]
+    struct U64(u64);
+    impl PrimitiveInt for U64 {}
+    test_integer_keys!(v, U64(std::u64::MIN));
+    test_integer_keys!(v, U64(std::u64::MAX));
+}