singleton java 8 date formatters

1 files changed, 45 insertions, 0 deletions

diff --git a/juick-core/src/test/java/com/juick/FormatterTest.java b/juick-core/src/test/java/com/juick/FormatterTest.java
new file mode 100644
index 00000000..d246c369
--- /dev/null
+++ b/juick-core/src/test/java/com/juick/FormatterTest.java
@@ -0,0 +1,45 @@
+package com.juick;
+
+import com.juick.util.DateFormattersHolder;
+import org.apache.commons.lang3.RandomUtils;
+import org.junit.Test;
+
+import java.util.Calendar;
+import java.util.Date;
+import java.util.GregorianCalendar;
+import java.util.TimeZone;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.*;
+
+/**
+ * Created by aalexeev on 12/7/16.
+ */
+public class FormatterTest {
+
+    @Test
+    public void forAnyDateFormatterShouldReturnNotEmptyString() throws Exception {
+        Date date = new Date();
+
+        assertThat(DateFormattersHolder.getMessageFormatterInstance().format(date), not(isEmptyOrNullString()));
+        assertThat(DateFormattersHolder.getRssFormatterInstance().format(date), not(isEmptyOrNullString()));
+
+        date = new Date(RandomUtils.nextLong(1, Long.MAX_VALUE / 10000));
+
+        assertThat(DateFormattersHolder.getMessageFormatterInstance().format(date), not(isEmptyOrNullString()));
+        assertThat(DateFormattersHolder.getRssFormatterInstance().format(date), not(isEmptyOrNullString()));
+    }
+
+    @Test
+    public void forConcreteDateShouldReturnCorrectString() throws Exception {
+        Calendar calendar = GregorianCalendar.getInstance();
+
+        calendar.set(2012, 0, 1, 0, 0, 0);
+        calendar.setTimeZone(TimeZone.getTimeZone("UTC"));
+
+        Date date = calendar.getTime();
+
+        assertThat(DateFormattersHolder.getMessageFormatterInstance().format(date), equalTo("2012-01-01 00:00:00"));
+        assertThat(DateFormattersHolder.getRssFormatterInstance().format(date), equalTo("Sun, 1 Jan 2012 00:00:00"));
+    }
+}