1 files changed, 41 insertions, 0 deletions
diff --git a/vendor/derivative/tests/rustc-zero-sized-btreemap-insert.rs b/vendor/derivative/tests/rustc-zero-sized-btreemap-insert.rs
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+++ b/vendor/derivative/tests/rustc-zero-sized-btreemap-insert.rs
@@ -0,0 +1,41 @@
+// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#[cfg(feature = "use_core")]
+extern crate core;
+
+#[macro_use]
+extern crate derivative;
+
+use std::collections::BTreeMap;
+use std::iter::Iterator;
+
+#[derive(Derivative)]
+#[derive(Ord, PartialOrd)]
+#[derivative(Eq, Hash, Debug, PartialEq)]
+// TODO: Ord, PartialOrd
+struct Zst;
+
+#[test]
+fn main() {
+    const N: usize = 8;
+
+    for len in 0..N {
+        let mut tester = BTreeMap::new();
+        assert_eq!(tester.len(), 0);
+        for _ in 0..len {
+            tester.insert(Zst, ());
+        }
+        assert_eq!(tester.len(), if len == 0 { 0 } else { 1 });
+        assert_eq!(tester.iter().count(), if len == 0 { 0 } else { 1 });
+        assert_eq!(tester.get(&Zst).is_some(), len > 0);
+        tester.clear();
+    }
+}