Vendor things

third-party/vendor/wasm-bindgen/tests/wasm/intrinsics.rs

@@ -0,0 +1,114 @@
+//! Tests that some of our more obscure intrinsics work properly.
+
+use std::convert::TryFrom;
+use std::fmt::Debug;
+
+use js_sys::{Array, Object, RangeError, Reflect};
+use wasm_bindgen::{JsCast, JsValue};
+use wasm_bindgen_test::wasm_bindgen_test;
+
+// Shorter `JsValue::from(i32)`.
+fn int(x: i32) -> JsValue {
+    JsValue::from(x)
+}
+
+#[wasm_bindgen_test]
+fn bitwise() {
+    assert_eq!(int(0b1110) & int(0b0111), 0b0110);
+    assert_eq!(int(0b1000) | int(0b0010), 0b1010);
+    assert_eq!(int(0b1110) ^ int(0b0100), 0b1010);
+    assert_eq!(int(0x00ffffff).bit_not(), 0xff000000u32 as i32);
+
+    assert_eq!(int(0b0001) << int(2), 0b0100);
+    assert_eq!(int(0b1000) >> int(2), 0b0010);
+    assert_eq!(int(-0b1000) >> int(2), -0b0010);
+    // Note that bit-wise, this is the same as the above `-0b1000`.
+    assert_eq!(
+        JsValue::from(0xfffffff8u32).unsigned_shr(&int(2)),
+        0x3ffffffe
+    );
+}
+
+#[wasm_bindgen_test]
+fn arithmetic() {
+    assert_eq!(-int(12), -12);
+    assert_eq!(int(1) + int(2), 3);
+    assert_eq!(int(1) - int(2), -1);
+    assert_eq!(int(10) / int(5), 2);
+    assert_eq!(int(42).checked_div(&int(6)), 7);
+    // Note that this doesn't throw for regular numbers, since they just give
+    // `NaN` for invalid results.
+    assert!(JsValue::bigint_from_str("0")
+        .checked_div(&JsValue::bigint_from_str("0"))
+        .dyn_into::<RangeError>()
+        .is_ok());
+    assert_eq!(int(12) * int(34), 408);
+    assert_eq!(int(17) % int(10), 7);
+    assert_eq!(int(2).pow(&int(8)), 256)
+}
+
+#[wasm_bindgen_test]
+fn cmp() {
+    assert!(int(2).lt(&int(3)));
+    assert!(!int(2).lt(&int(2)));
+
+    assert!(int(2).le(&int(3)));
+    assert!(int(2).le(&int(2)));
+
+    assert!(int(3).ge(&int(2)));
+    assert!(int(3).ge(&int(3)));
+
+    assert!(int(3).gt(&int(2)));
+    assert!(!int(3).gt(&int(3)));
+
+    assert!(int(2) == int(2));
+    assert!(int(2) != int(3));
+
+    assert!(int(2) != JsValue::from_str("2"));
+    assert!(int(2).loose_eq(&JsValue::from_str("2")));
+}
+
+#[wasm_bindgen_test]
+fn types() {
+    assert!(
+        Reflect::get(&js_sys::global(), &JsValue::from_str("Number"))
+            .unwrap()
+            .is_function()
+    );
+    assert!(JsValue::UNDEFINED.is_undefined());
+    assert!(JsValue::NULL.is_null());
+    assert!(Object::new().is_object());
+    assert!(Array::new().is_array());
+    assert!(JsValue::symbol(None).is_symbol());
+    assert!(JsValue::from_str("hi").is_string());
+    assert!(JsValue::bigint_from_str("5").is_bigint());
+    assert_eq!(int(5).js_typeof(), "number");
+    assert_eq!(JsValue::bigint_from_str("5").js_typeof(), "bigint");
+    assert_eq!(JsValue::NULL.js_typeof(), "object");
+}
+
+#[wasm_bindgen_test]
+fn misc() {
+    assert!(JsValue::from_str("Number").js_in(&js_sys::global()));
+    assert!(!JsValue::from_str("frob").js_in(&js_sys::global()));
+
+    assert_eq!(int(5).unchecked_into_f64(), 5.0);
+    assert_eq!(JsValue::from_str("5").unchecked_into_f64(), 5.0);
+
+    assert_eq!(f64::try_from(int(5)), Ok(5.0));
+    assert_eq!(f64::try_from(JsValue::from_str("5")), Ok(5.0));
+    assert!(f64::try_from(JsValue::from_str("hi")).unwrap().is_nan());
+    assert!(f64::try_from(JsValue::symbol(None)).is_err());
+}
+
+fn debug(x: impl Debug) -> String {
+    format!("{x:?}")
+}
+
+#[wasm_bindgen_test]
+fn debug_string() {
+    assert_eq!(debug(int(5)), "JsValue(5)");
+    assert_eq!(debug(JsValue::TRUE), "JsValue(true)");
+    assert_eq!(debug(JsValue::symbol(None)), "JsValue(Symbol)");
+    assert_eq!(debug(JsValue::from_str("hi")), "JsValue(\"hi\")");
+}