Add Promise.race functions

1 files changed, 88 insertions, 2 deletions

diff --git a/test/gleam/javascript/promise_test.gleam b/test/gleam/javascript/promise_test.gleam
index f3133df..50edd8e 100644
--- a/test/gleam/javascript/promise_test.gleam
+++ b/test/gleam/javascript/promise_test.gleam
@@ -1,6 +1,7 @@
-import gleam/javascript/promise.{type Promise}
-import gleam/javascript/array
+import gleam/io
 import gleam/javascript.{ObjectType}
+import gleam/javascript/array
+import gleam/javascript/promise.{type Promise}
 
 pub fn new_promise_test() {
   promise.new(fn(resolve) { resolve(1) })
@@ -211,3 +212,88 @@ pub fn await_list_test() {
     let assert [1, 3, 4, 6, 10, 13] = x
   })
 }
+
+fn never_resolving_promise() {
+  promise.new(fn(_) { Nil })
+}
+
+pub fn race2_test() {
+  promise.race2(never_resolving_promise(), promise.resolve(1))
+  |> promise.tap(fn(x) {
+    let assert 1 = x
+  })
+}
+
+pub fn race3_test() {
+  promise.race3(
+    never_resolving_promise(),
+    promise.resolve(1),
+    never_resolving_promise(),
+  )
+  |> promise.tap(fn(x) {
+    let assert 1 = x
+  })
+}
+
+pub fn race4_test() {
+  promise.race4(
+    never_resolving_promise(),
+    never_resolving_promise(),
+    promise.resolve(1),
+    never_resolving_promise(),
+  )
+  |> promise.tap(fn(x) {
+    let assert 1 = x
+  })
+}
+
+pub fn race5_test() {
+  promise.race5(
+    never_resolving_promise(),
+    never_resolving_promise(),
+    promise.resolve(1),
+    never_resolving_promise(),
+    never_resolving_promise(),
+  )
+  |> promise.tap(fn(x) {
+    let assert 1 = x
+  })
+}
+
+pub fn race6_test() {
+  promise.race6(
+    never_resolving_promise(),
+    never_resolving_promise(),
+    promise.resolve(1),
+    never_resolving_promise(),
+    never_resolving_promise(),
+    never_resolving_promise(),
+  )
+  |> promise.tap(fn(x) {
+    let assert 1 = x
+  })
+}
+
+pub fn race_list_test() {
+  promise.race_list([
+    never_resolving_promise(),
+    promise.resolve(1),
+    never_resolving_promise(),
+  ])
+  |> promise.tap(fn(x) {
+    let assert 1 = x
+  })
+}
+
+pub fn race_array_test() {
+  promise.race_array(
+    array.from_list([
+      never_resolving_promise(),
+      promise.resolve(1),
+      never_resolving_promise(),
+    ]),
+  )
+  |> promise.tap(fn(x) {
+    let assert 1 = x
+  })
+}