move more android tests

src/test/java/cloud/eppo/UtilsTest.java

@@ -0,0 +1,27 @@
+package cloud.eppo;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.junit.jupiter.api.Test;
+
+import java.util.Date;
+
+import static cloud.eppo.Utils.parseUtcISODateElement;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNull;
+
+public class UtilsTest {
+  @Test
+  public void testParseUtcISODateElement() throws JsonProcessingException {
+    ObjectMapper mapper = new ObjectMapper();
+    JsonNode jsonNode = mapper.readTree("\"2024-05-01T16:13:26.651Z\"");
+    Date parsedDate = parseUtcISODateElement(jsonNode);
+    Date expectedDate = new Date(1714580006651L);
+    assertEquals(expectedDate, parsedDate);
+    jsonNode = mapper.readTree("null");
+    parsedDate = parseUtcISODateElement(jsonNode);
+    assertNull(parsedDate);
+    assertNull(parseUtcISODateElement(null));
+  }
+}