test/java/time/tck/java/time/format/TCKDateTimeFormatterBuilder.java

@@ -791,11 +791,47 @@
     public void test_modJulianFieldValues(int y, int m, int d, String expected) throws Exception {
         DateTimeFormatter df = new DateTimeFormatterBuilder().appendPattern("g").toFormatter();
          assertEquals(LocalDate.of(y, m, d).format(df), expected);
     }
 
+    //-----------------------------------------------------------------------
+    @DataProvider(name="dayOfYearFieldPattern")
+    Object[][] data_dayOfYearFieldPattern() {
+        return new Object[][] {
+                {"D", "1"},
+                {"D", "123"},
+                {"DD", "12"},
+                {"DD", "123"},
+                {"DDD", "123"},
+                {"DDD", "12345"},
+        };
+    }
+
+    @Test(dataProvider="dayOfYearFieldPattern")
+    public void test_dayOfYearFieldPattern(String pattern, String input) throws Exception {
+        DateTimeFormatter.ofPattern(pattern).parse(input);
+    }
 
+    @DataProvider(name="dayOfYearFieldValues")
+    Object[][] data_dayOfYearFieldValues() {
+        return new Object[][] {
+                {2016, 1, 1, "D", "1"},
+                {2016, 1, 31, "D", "31"},
+                {2016, 1, 1, "DD", "01"},
+                {2016, 1, 31, "DD", "31"},
+                {2016, 4, 9, "DD", "100"},
+                {2016, 1, 1, "DDD", "001"},
+                {2016, 1, 31, "DDD", "031"},
+                {2016, 4, 9, "DDD", "100"},
+        };
+    }
+
+    @Test(dataProvider="dayOfYearFieldValues")
+    public void test_dayOfYearFieldValues(int y, int m, int d, String pattern, String expected) throws Exception {
+        DateTimeFormatter df = new DateTimeFormatterBuilder().appendPattern(pattern).toFormatter();
+        assertEquals(LocalDate.of(y, m, d).format(df), expected);
+    }
     //-----------------------------------------------------------------------
     @Test
     public void test_adjacent_strict_firstFixedWidth() throws Exception {
         // succeeds because both number elements are fixed width
         DateTimeFormatter f = builder.appendValue(HOUR_OF_DAY, 2).appendValue(MINUTE_OF_HOUR, 2).appendLiteral('9').toFormatter(Locale.UK);