1 files changed, 117 insertions, 0 deletions
diff --git a/third_party/rust/fastrand/tests/smoke.rs b/third_party/rust/fastrand/tests/smoke.rs
new file mode 100644
index 0000000000..07e5c8e23d
--- /dev/null
+++ b/third_party/rust/fastrand/tests/smoke.rs
@@ -0,0 +1,117 @@
+#[cfg(target_arch = "wasm32")]
+use wasm_bindgen_test::*;
+
+#[cfg(target_arch = "wasm32")]
+wasm_bindgen_test::wasm_bindgen_test_configure!(run_in_browser);
+
+#[test]
+#[cfg_attr(target_arch = "wasm32", wasm_bindgen_test)]
+fn bool() {
+    for x in &[false, true] {
+        while fastrand::bool() != *x {}
+    }
+}
+
+#[test]
+#[cfg_attr(target_arch = "wasm32", wasm_bindgen_test)]
+fn u8() {
+    for x in 0..10 {
+        while fastrand::u8(..10) != x {}
+    }
+
+    for x in 200..=u8::MAX {
+        while fastrand::u8(200..) != x {}
+    }
+}
+
+#[test]
+#[cfg_attr(target_arch = "wasm32", wasm_bindgen_test)]
+fn i8() {
+    for x in -128..-120 {
+        while fastrand::i8(..-120) != x {}
+    }
+
+    for x in 120..=127 {
+        while fastrand::i8(120..) != x {}
+    }
+}
+
+#[test]
+#[cfg_attr(target_arch = "wasm32", wasm_bindgen_test)]
+fn u32() {
+    for n in 1u32..10_000 {
+        let n = n.wrapping_mul(n);
+        let n = n.wrapping_mul(n);
+        if n != 0 {
+            for _ in 0..1000 {
+                assert!(fastrand::u32(..n) < n);
+            }
+        }
+    }
+}
+
+#[test]
+#[cfg_attr(target_arch = "wasm32", wasm_bindgen_test)]
+fn u64() {
+    for n in 1u64..10_000 {
+        let n = n.wrapping_mul(n);
+        let n = n.wrapping_mul(n);
+        let n = n.wrapping_mul(n);
+        if n != 0 {
+            for _ in 0..1000 {
+                assert!(fastrand::u64(..n) < n);
+            }
+        }
+    }
+}
+
+#[test]
+#[cfg_attr(target_arch = "wasm32", wasm_bindgen_test)]
+fn u128() {
+    for n in 1u128..10_000 {
+        let n = n.wrapping_mul(n);
+        let n = n.wrapping_mul(n);
+        let n = n.wrapping_mul(n);
+        let n = n.wrapping_mul(n);
+        if n != 0 {
+            for _ in 0..1000 {
+                assert!(fastrand::u128(..n) < n);
+            }
+        }
+    }
+}
+
+#[test]
+#[cfg_attr(target_arch = "wasm32", wasm_bindgen_test)]
+fn rng() {
+    let r = fastrand::Rng::new();
+
+    assert_ne!(r.u64(..), r.u64(..));
+
+    r.seed(7);
+    let a = r.u64(..);
+    r.seed(7);
+    let b = r.u64(..);
+    assert_eq!(a, b);
+}
+
+#[test]
+#[cfg_attr(target_arch = "wasm32", wasm_bindgen_test)]
+fn rng_init() {
+    let a = fastrand::Rng::new();
+    let b = fastrand::Rng::new();
+    assert_ne!(a.u64(..), b.u64(..));
+
+    a.seed(7);
+    b.seed(7);
+    assert_eq!(a.u64(..), b.u64(..));
+}
+
+#[test]
+#[cfg_attr(target_arch = "wasm32", wasm_bindgen_test)]
+fn with_seed() {
+    let a = fastrand::Rng::with_seed(7);
+    let b = fastrand::Rng::new();
+    b.seed(7);
+    assert_eq!(a.u64(..), b.u64(..));
+}