Add ulid package

ulid/ulid_test.go

@@ -0,0 +1,25 @@
+package ulid
+
+import (
+	"testing"
+	"time"
+)
+
+func TestULID(t *testing.T) {
+	tm := time.Now()
+	ul1, err := MakeULID(tm)
+	if err != nil {
+		t.Logf("makeULID failed: %s", err)
+		t.Fail()
+	}
+	ul2, err := MakeULID(tm)
+	if err != nil {
+		t.Logf("MakeULID failed: %s", err)
+		t.Fail()
+	}
+	if ul1.String() == ul2.String() {
+		t.Logf("ul1 and ul2 got the same string: %s", ul1.String())
+		t.Fail()
+	}
+	t.Logf("ulid string 1 and 2: %s | %s", ul1.String(), ul2.String())
+}