Add test for successful Ulimit Parse.

Signed-off-by: Allen Madsen <blatyo@gmail.com>

pkg/ulimit/ulimit_test.go

@@ -2,6 +2,13 @@ package ulimit
 
 import "testing"
 
+func TestParseValid(t *testing.T) {
+	u1 := &Ulimit{"nofile", 1024, 512}
+	if u2, _ := Parse("nofile=512:1024"); u1 == u2 {
+		t.Fatalf("expected %s, but got %s", u1.String(), u2.String())
+	}
+}
+
 func TestParseInvalidLimitType(t *testing.T) {
 	if _, err := Parse("notarealtype=1024:1024"); err == nil {
 		t.Fatalf("expected error on invalid ulimit type")