Test date parsing/formatting

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

test/Dates.java

@@ -0,0 +1,25 @@
+import java.text.FieldPosition;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+
+public class Dates {
+  private final static long EPOCH = 1234567890;
+  private final static String TEXT = "2009-02-13T23:31:30";
+
+  private static void expect(boolean v) {
+    if (! v) throw new RuntimeException();
+  }
+
+  public static void main(String[] args) throws Exception {
+    SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss");
+    Date date = format.parse("1970-01-01T00:00:00");
+    expect(0 == date.getTime());
+
+    date = new Date(EPOCH * 1000l);
+    String actual = format.format(date, new StringBuffer(), new FieldPosition(0)).toString();
+    expect(TEXT.equals(actual));
+
+    date = format.parse(TEXT);
+    expect(EPOCH == date.getTime() / 1000l);
+  }
+}