test(Sharing): Integration test for no expiration set date for share

- Verify that explicitly sending empty `expireDate` param to server overwrite default
and sets not expiry date, if non is enforced.

- Update tests to avoid converting empty string to date.

Signed-off-by: fenn-cs <fenn25.fn@gmail.com>

build/integration/features/bootstrap/Sharing.php

@@ -54,7 +54,9 @@ public function asCreatingAShareWith($user, $body) {
 			$fd = $body->getRowsHash();
 			if (array_key_exists('expireDate', $fd)) {
 				$dateModification = $fd['expireDate'];
-				$fd['expireDate'] = date('Y-m-d', strtotime($dateModification));
+				if (!empty($dateModification)) {
+					$fd['expireDate'] = date('Y-m-d', strtotime($dateModification));
+				}
 			}
 			$options['form_params'] = $fd;
 		}
@@ -301,7 +303,9 @@ public function createShare($user,
 	public function isFieldInResponse($field, $contentExpected) {
 		$data = simplexml_load_string($this->response->getBody())->data[0];
 		if ((string)$field == 'expiration') {
-			$contentExpected = date('Y-m-d', strtotime($contentExpected)) . " 00:00:00";
+			if(!empty($contentExpected)) {
+				$contentExpected = date('Y-m-d', strtotime($contentExpected)) . " 00:00:00";
+			}
 		}
 		if (count($data->element) > 0) {
 			foreach ($data as $element) {

build/integration/sharing_features/sharing-v1.feature

@@ -229,6 +229,24 @@ Feature: sharing
       | url | AN_URL |
       | mimetype | httpd/unix-directory |
 
+  Scenario: Creating a new share with expiration date removed, when default expiration is set
+    Given user "user0" exists
+    And user "user1" exists
+    And parameter "shareapi_default_expire_date" of app "core" is set to "yes"
+    And As an "user0"
+    When creating a share with
+      | path | welcome.txt |
+      | shareWith | user1 |
+      | shareType | 0 |
+      | expireDate | |
+    Then the OCS status code should be "100"
+    And the HTTP status code should be "200"
+    And Getting info of last share
+    Then the OCS status code should be "100"
+    And the HTTP status code should be "200"
+    And Share fields of last share match with
+      | expiration ||
+
   Scenario: Creating a new public share, updating its password and getting its info
     Given user "user0" exists
     And As an "user0"