Date utils test (#380)

* Add test for date parsing

* Add test for the older api

* Correct milliseconds format

app/src/androidTest/java/apps/amine/bou/readerforselfoss/DateUtilsTest.kt

@@ -0,0 +1,31 @@
+package apps.amine.bou.readerforselfoss
+
+import apps.amine.bou.readerforselfoss.utils.Config
+import apps.amine.bou.readerforselfoss.utils.parseDate
+import org.junit.Test
+
+class DateUtilsTest {
+
+    @Test
+    fun parseDateV4() {
+
+        Config.apiVersion = 4
+        val dateString = "2013-04-07T13:43:00+01:00"
+
+        val milliseconds = parseDate(dateString).toEpochMilli()
+        val correctMilliseconds : Long = 1365338580000
+
+        assert(milliseconds == correctMilliseconds)
+    }
+
+    @Test
+    fun parseDateV1() {
+        Config.apiVersion = 0
+        val dateString = "2013-04-07 13:43:00"
+
+        val milliseconds = parseDate(dateString).toEpochMilli()
+        val correctMilliseconds = 1365342180000
+
+        assert(milliseconds == correctMilliseconds)
+    }
+}