diff options
| -rw-r--r-- | src/gleam/os.gleam | 13 | ||||
| -rw-r--r-- | test/gleam/os_test.gleam | 13 |
2 files changed, 26 insertions, 0 deletions
diff --git a/src/gleam/os.gleam b/src/gleam/os.gleam index 8ae522d..0c3f38a 100644 --- a/src/gleam/os.gleam +++ b/src/gleam/os.gleam @@ -45,3 +45,16 @@ pub fn delete_env(key: String) -> Nil { os_unsetenv(string_to_char_list(key)) Nil } + +pub type TimeUnit { + Second + Millisecond + Microsecond + Nanosecond +} + +/// Return the current OS system time. +/// +/// https://erlang.org/doc/apps/erts/time_correction.html#OS_System_Time +pub external fn system_time(TimeUnit) -> Int = + "os" "system_time" diff --git a/test/gleam/os_test.gleam b/test/gleam/os_test.gleam index f248d2b..8a0b5f1 100644 --- a/test/gleam/os_test.gleam +++ b/test/gleam/os_test.gleam @@ -1,5 +1,6 @@ import gleam/map import gleam/os +import gleam/io import gleam/should pub fn env_test() { @@ -13,3 +14,15 @@ pub fn env_test() { |> map.get("GLEAM_TEST") |> should.equal(Error(Nil)) } + +pub fn system_time_test() { + let june_12_2020 = 1591966971 + os.system_time(os.Second) > june_12_2020 + |> should.equal(True) + os.system_time(os.Second) < june_12_2020 * 1000 + |> should.equal(True) + os.system_time(os.Millisecond) > june_12_2020 * 1000 + |> should.equal(True) + os.system_time(os.Millisecond) < june_12_2020 * 1000000 + |> should.equal(True) +} |