feat(unstable): Add "Deno.osUptime()" API (#17179)

This PR adds support for `Deno.osUptime` which reports number of seconds
since os was booted. It will allow us to be compatible with Node's `os.uptime` -
https://nodejs.org/api/os.html#osuptime

Partially based on
https://docs.rs/uptime_lib/latest/src/uptime_lib/lib.rs.html

1 files changed, 12 insertions, 0 deletions

diff --git a/cli/tests/unit/os_test.ts b/cli/tests/unit/os_test.ts
index 5e88f02c1..ae2bee72e 100644
--- a/cli/tests/unit/os_test.ts
+++ b/cli/tests/unit/os_test.ts
@@ -239,6 +239,18 @@ Deno.test({ permissions: { sys: false } }, function releasePerm() {
   }, Deno.errors.PermissionDenied);
 });
 
+Deno.test({ permissions: { sys: ["osUptime"] } }, function osUptime() {
+  const uptime = Deno.osUptime();
+  assert(typeof uptime === "number");
+  assert(uptime > 0);
+});
+
+Deno.test({ permissions: { sys: false } }, function osUptimePerm() {
+  assertThrows(() => {
+    Deno.osUptime();
+  }, Deno.errors.PermissionDenied);
+});
+
 Deno.test(
   { permissions: { sys: ["systemMemoryInfo"] } },
   function systemMemoryInfo() {