Added test for 令和元年(Japanese reiwa era 1) (=2019)

test/ja/ja_standard.test.js

@@ -99,7 +99,24 @@ test("Test - Single Expression", function() {
         expect(expectDate.getTime()).toBeCloseTo(resultDate.getTime())
     } 
 
-
+    var text = "主な株主（令和元年5月1日）";
+    var results = chrono.parse(text, new Date(2012,8-1,10));
+    expect(results.length).toBe(1)
+
+    var result = results[0];
+    if (result) {
+        expect(result.index).toBe(5)
+        expect(result.text).toBe('令和元年5月1日')
+
+        expect(result.start).not.toBeNull()
+        expect(result.start.get('year')).toBe(2019)
+        expect(result.start.get('month')).toBe(5)
+        expect(result.start.get('day')).toBe(1)
+
+        var resultDate = result.start.date();
+        var expectDate = new Date(2019, 5-1, 1, 12);
+        expect(expectDate.getTime()).toBeCloseTo(resultDate.getTime())
+    }
 });