[fix] double calculating (fract. day) div rest hour on Date civil/jd

kares · kares · commit 69364e22cab6 · 2018-03-19T15:35:24.000+01:00
resolves GH-5092
diff --git a/core/src/main/java/org/jruby/ext/date/RubyDate.java b/core/src/main/java/org/jruby/ext/date/RubyDate.java
@@ -545,21 +545,18 @@ private static RubyDate jdImpl(ThreadContext context, IRubyObject self, IRubyObj
 
     static DateTime adjustWithDayFraction(ThreadContext context, DateTime dt, final long[] rest) {
         final RubyFixnum zero = RubyFixnum.zero(context.runtime);
-        int ival = getHour(context, zero, rest);
+        int ival;
+
+        ival = getHour(context, zero, rest);
         dt = dt.plusHours(ival);
 
         if (rest[0] != 0) {
-            ival = getHour(context, zero, rest);
-            dt = dt.plusHours(ival);
+            ival = getMinute(context, zero, rest);
+            dt = dt.plusMinutes(ival);
 
             if (rest[0] != 0) {
-                ival = getMinute(context, zero, rest);
-                dt = dt.plusMinutes(ival);
-
-                if (rest[0] != 0) {
-                    ival = getSecond(context, zero, rest);
-                    dt = dt.plusSeconds(ival);
-                }
+                ival = getSecond(context, zero, rest);
+                dt = dt.plusSeconds(ival);
             }
         }
         return dt;
diff --git a/test/jruby/test_date.rb b/test/jruby/test_date.rb
@@ -744,4 +744,12 @@ def test_strftime__offset
     end
   end
 
+  def test_jd_day_fraction
+    t = 86400 * DateTime.new(1970, 1, 1).jd + Time.utc(2018, 3, 18, 23).to_i
+    dt = DateTime.jd((t + 0)/86400r)
+    assert_equal '2018-03-18T23:00:00+00:00', dt.to_s
+    dt = DateTime.jd((t + 1)/86400r)
+    assert_equal '2018-03-18T23:00:01+00:00', dt.to_s
+  end
+
 end
