feat(std/fs/node): adding some functions (#7921)

1 files changed, 32 insertions, 0 deletions

diff --git a/std/node/_fs/_fs_watch_test.ts b/std/node/_fs/_fs_watch_test.ts
new file mode 100644
index 000000000..e85b4c9bc
--- /dev/null
+++ b/std/node/_fs/_fs_watch_test.ts
@@ -0,0 +1,32 @@
+import { watch } from "./_fs_watch.ts";
+import { assertEquals, fail } from "../../testing/asserts.ts";
+
+function wait(time: number) {
+  return new Promise((resolve) => {
+    setTimeout(resolve, time);
+  });
+}
+
+Deno.test({
+  name: "watching a file",
+  async fn() {
+    const file = Deno.makeTempFileSync();
+    const result: Array<[string, string]> = [];
+    await new Promise((resolve) => {
+      const watcher = watch(
+        file,
+        (eventType, filename) => result.push([eventType, filename]),
+      );
+      wait(100)
+        .then(() => Deno.writeTextFileSync(file, "something"))
+        .then(() => wait(100))
+        .then(() => watcher.close())
+        .then(() => wait(100))
+        .then(resolve);
+    })
+      .then(() => {
+        assertEquals(result.length >= 1, true);
+      })
+      .catch(() => fail());
+  },
+});