Add spec for rb_timespec_now

* See #175.

Author: eregon

optional/capi/ext/rubyspec.h

@@ -602,6 +602,7 @@
 #define HAVE_RB_TIME_TIMEVAL               1
 #define HAVE_RB_TIME_TIMESPEC              1
 #ifdef RUBY_VERSION_IS_2_3
+#define HAVE_RB_TIMESPEC_NOW               1
 #define HAVE_RB_TIME_TIMESPEC_NEW          1
 #endif
 

optional/capi/ext/time_spec.c

@@ -65,6 +65,15 @@ static VALUE time_spec_rb_time_timespec_new(VALUE self, VALUE sec, VALUE nsec, V
 }
 #endif
 
+#ifdef HAVE_RB_TIMESPEC_NOW
+static VALUE time_spec_rb_time_from_timspec_now(VALUE self, VALUE offset) {
+  struct timespec ts;
+  rb_timespec_now(&ts);
+
+  return rb_time_timespec_new(&ts, NUM2INT(offset));
+}
+#endif
+
 #ifdef HAVE_TIMET2NUM
 static VALUE time_spec_TIMET2NUM(VALUE self) {
   time_t t = 10;
@@ -107,6 +116,10 @@ void Init_time_spec(void) {
 #ifdef HAVE_RB_TIME_TIMESPEC_NEW
   rb_define_method(cls, "rb_time_timespec_new", time_spec_rb_time_timespec_new, 3);
 #endif
+
+#ifdef HAVE_RB_TIMESPEC_NOW
+  rb_define_method(cls, "rb_time_from_timespec", time_spec_rb_time_from_timspec_now, 1);
+#endif
 }
 
 #ifdef __cplusplus

optional/capi/time_spec.rb

@@ -283,5 +283,14 @@
         lambda { @s.rb_time_timespec_new(1447087832, 476451125, -86400) }.should raise_error(ArgumentError)
       end
     end
+
+    describe "rb_timespec_now" do
+      it "fills a struct timespec with the current time" do
+        now = Time.now
+        time = @s.rb_time_from_timespec(now.utc_offset)
+        time.should be_an_instance_of(Time)
+        (time - now).should be_close(0, 10)
+      end
+    end
   end
 end