1 files changed, 164 insertions, 0 deletions
diff --git a/third_party/rust/lazy_static/tests/test.rs b/third_party/rust/lazy_static/tests/test.rs
new file mode 100644
index 0000000000..03d0ab683a
--- /dev/null
+++ b/third_party/rust/lazy_static/tests/test.rs
@@ -0,0 +1,164 @@
+#[macro_use]
+extern crate lazy_static;
+use std::collections::HashMap;
+
+lazy_static! {
+    /// Documentation!
+    pub static ref NUMBER: u32 = times_two(3);
+
+    static ref ARRAY_BOXES: [Box<u32>; 3] = [Box::new(1), Box::new(2), Box::new(3)];
+
+    /// More documentation!
+    #[allow(unused_variables)]
+    #[derive(Copy, Clone, Debug)]
+    pub static ref STRING: String = "hello".to_string();
+
+    static ref HASHMAP: HashMap<u32, &'static str> = {
+        let mut m = HashMap::new();
+        m.insert(0, "abc");
+        m.insert(1, "def");
+        m.insert(2, "ghi");
+        m
+    };
+
+    // This should not compile if the unsafe is removed.
+    static ref UNSAFE: u32 = unsafe {
+        std::mem::transmute::<i32, u32>(-1)
+    };
+}
+
+lazy_static! {
+    static ref S1: &'static str = "a";
+    static ref S2: &'static str = "b";
+}
+lazy_static! {
+    static ref S3: String = [*S1, *S2].join("");
+}
+
+#[test]
+fn s3() {
+    assert_eq!(&*S3, "ab");
+}
+
+fn times_two(n: u32) -> u32 {
+    n * 2
+}
+
+#[test]
+fn test_basic() {
+    assert_eq!(&**STRING, "hello");
+    assert_eq!(*NUMBER, 6);
+    assert!(HASHMAP.get(&1).is_some());
+    assert!(HASHMAP.get(&3).is_none());
+    assert_eq!(&*ARRAY_BOXES, &[Box::new(1), Box::new(2), Box::new(3)]);
+    assert_eq!(*UNSAFE, std::u32::MAX);
+}
+
+#[test]
+fn test_repeat() {
+    assert_eq!(*NUMBER, 6);
+    assert_eq!(*NUMBER, 6);
+    assert_eq!(*NUMBER, 6);
+}
+
+#[test]
+fn test_meta() {
+    // this would not compile if STRING were not marked #[derive(Copy, Clone)]
+    let copy_of_string = STRING;
+    // just to make sure it was copied
+    assert!(&STRING as *const _ != &copy_of_string as *const _);
+
+    // this would not compile if STRING were not marked #[derive(Debug)]
+    assert_eq!(format!("{:?}", STRING), "STRING { __private_field: () }".to_string());
+}
+
+mod visibility {
+    lazy_static! {
+        pub static ref FOO: Box<u32> = Box::new(0);
+        static ref BAR: Box<u32> = Box::new(98);
+    }
+
+    pub mod inner {
+        lazy_static! {
+            pub(in visibility) static ref BAZ: Box<u32> = Box::new(42);
+            pub(crate) static ref BAG: Box<u32> = Box::new(37);
+        }
+    }
+
+    #[test]
+    fn sub_test() {
+        assert_eq!(**FOO, 0);
+        assert_eq!(**BAR, 98);
+        assert_eq!(**inner::BAZ, 42);
+        assert_eq!(**inner::BAG, 37);
+    }
+}
+
+#[test]
+fn test_visibility() {
+    assert_eq!(*visibility::FOO, Box::new(0));
+    assert_eq!(*visibility::inner::BAG, Box::new(37));
+}
+
+// This should not cause a warning about a missing Copy implementation
+lazy_static! {
+    pub static ref VAR: i32 = { 0 };
+}
+
+#[derive(Copy, Clone, Debug, PartialEq)]
+struct X;
+struct Once(X);
+const ONCE_INIT: Once = Once(X);
+static DATA: X = X;
+static ONCE: X = X;
+fn require_sync() -> X { X }
+fn transmute() -> X { X }
+fn __static_ref_initialize() -> X { X }
+fn test(_: Vec<X>) -> X { X }
+
+// All these names should not be shadowed
+lazy_static! {
+    static ref ITEM_NAME_TEST: X = {
+        test(vec![X, Once(X).0, ONCE_INIT.0, DATA, ONCE,
+                  require_sync(), transmute(),
+                  // Except this, which will sadly be shadowed by internals:
+                  // __static_ref_initialize()
+                  ])
+    };
+}
+
+#[test]
+fn item_name_shadowing() {
+    assert_eq!(*ITEM_NAME_TEST, X);
+}
+
+use std::sync::atomic::AtomicBool;
+#[allow(deprecated)]
+use std::sync::atomic::ATOMIC_BOOL_INIT;
+use std::sync::atomic::Ordering::SeqCst;
+
+#[allow(deprecated)]
+static PRE_INIT_FLAG: AtomicBool = ATOMIC_BOOL_INIT;
+
+lazy_static! {
+    static ref PRE_INIT: () = {
+        PRE_INIT_FLAG.store(true, SeqCst);
+        ()
+    };
+}
+
+#[test]
+fn pre_init() {
+    assert_eq!(PRE_INIT_FLAG.load(SeqCst), false);
+    lazy_static::initialize(&PRE_INIT);
+    assert_eq!(PRE_INIT_FLAG.load(SeqCst), true);
+}
+
+lazy_static! {
+    static ref LIFETIME_NAME: for<'a> fn(&'a u8) = { fn f(_: &u8) {} f };
+}
+
+#[test]
+fn lifetime_name() {
+    let _ = LIFETIME_NAME;
+}