[0.12.x] fix #1486 and add Util unit tests

horreum-backend/src/main/java/io/hyperfoil/tools/horreum/svc/Util.java

@@ -653,7 +653,7 @@ public static Instant toInstant(Object time) {
          try {
             return ZonedDateTime.parse(str, DateTimeFormatter.ISO_DATE_TIME).toInstant();
          } catch (DateTimeParseException e) {
-            e.printStackTrace();
+            log.warn("failed to convert "+time+" to timestamp using "+str,e);
          }
       }
       return null;//nothing matched

horreum-backend/src/test/java/io/hyperfoil/tools/horreum/svc/UtilTest.java

@@ -0,0 +1,44 @@
+package io.hyperfoil.tools.horreum.svc;
+
+
+import com.fasterxml.jackson.databind.node.LongNode;
+import com.fasterxml.jackson.databind.node.TextNode;
+import io.hyperfoil.tools.horreum.test.HorreumTestProfile;
+import io.hyperfoil.tools.horreum.test.PostgresResource;
+import io.quarkus.test.common.QuarkusTestResource;
+import io.quarkus.test.junit.QuarkusTest;
+import io.quarkus.test.junit.TestProfile;
+import io.quarkus.test.oidc.server.OidcWiremockTestResource;
+import org.junit.jupiter.api.Test;
+import java.io.IOException;
+import java.time.Instant;
+
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+@QuarkusTest
+@QuarkusTestResource(PostgresResource.class)
+@QuarkusTestResource(OidcWiremockTestResource.class)
+@TestProfile(HorreumTestProfile.class)
+public class UtilTest {
+
+
+    @Test
+    public void toInstant_valid() throws IOException {
+        //already an instant
+        assertNotNull(Util.toInstant(Instant.now()),"failed to handle instant input");
+        //number
+        assertNotNull(Util.toInstant(System.currentTimeMillis()),"failed to parse current millis");
+        //strings
+        assertNotNull(Util.toInstant(""+System.currentTimeMillis()),"failed to parse millis as string");
+        assertNotNull(Util.toInstant("2020-01-01"),"failed to parse yyyy-mm-dd");
+        assertNotNull(Util.toInstant("2020-01-01T01:01:01"),"failed to parse YYYY-MM-DDTHH:mm:ss");
+        assertNotNull(Util.toInstant("2020-01-01T01:01:01Z"),"failed to parse YYYY-MM-DDThh:mm:ssZ");
+        assertNotNull(Util.toInstant("2020-01-01T01:01:01+00:00"),"failed to parse YYYY-MM-DDThh:mm:ss[+-]zz:zz");
+        assertNotNull(Util.toInstant("2024-03-11T22:16:24.302655-04:00"),"failed to parse ISO with microseconds and zzzz");
+        //json
+        assertNotNull(Util.toInstant(new TextNode("2020-01-01")),"failed to parse json text YYYY-MM-DD");
+        assertNotNull(Util.toInstant(new LongNode(System.currentTimeMillis())),"failed to parse current millis as json node");
+
+    }
+
+}