1 files changed, 83 insertions, 0 deletions
diff --git a/engine/tests/api/helpers.php b/engine/tests/api/helpers.php
index 77205138d..a615be0c0 100644
--- a/engine/tests/api/helpers.php
+++ b/engine/tests/api/helpers.php
@@ -518,4 +518,87 @@ class ElggCoreHelpersTest extends ElggCoreUnitTest {
 
 		$this->assertIdentical($elements_sorted_string, $test_elements);
 	}
+
+	// see http://trac.elgg.org/ticket/4288
+	public function testElggBatchIncOffset() {
+		// normal increment
+		$options = array(
+			'offset' => 0,
+			'limit' => 11
+		);
+		$batch = new ElggBatch(array('ElggCoreHelpersTest', 'test_elgg_batch_callback'), $options,
+				null, 5);
+		$j = 0;
+		foreach ($batch as $e) {
+			$offset = floor($j / 5) * 5;
+			$this->assertEqual($offset, $e['offset']);
+			$this->assertEqual($j + 1, $e['index']);
+			$j++;
+		}
+
+		$this->assertEqual(11, $j);
+
+		// no increment, 0 start
+		ElggCoreHelpersTest::test_elgg_batch_callback(array(), true);
+		$options = array(
+			'offset' => 0,
+			'limit' => 11
+		);
+		$batch = new ElggBatch(array('ElggCoreHelpersTest', 'test_elgg_batch_callback'), $options,
+				null, 5);
+		$batch->setIncrementOffset(false);
+
+		$j = 0;
+		foreach ($batch as $e) {
+			$this->assertEqual(0, $e['offset']);
+			// should always be the same 5
+			$this->assertEqual($e['index'], $j + 1 - (floor($j / 5) * 5));
+			$j++;
+		}
+		$this->assertEqual(11, $j);
+
+		// no increment, 3 start
+		ElggCoreHelpersTest::test_elgg_batch_callback(array(), true);
+		$options = array(
+			'offset' => 3,
+			'limit' => 11
+		);
+		$batch = new ElggBatch(array('ElggCoreHelpersTest', 'test_elgg_batch_callback'), $options,
+				null, 5);
+		$batch->setIncrementOffset(false);
+
+		$j = 0;
+		foreach ($batch as $e) {
+			$this->assertEqual(3, $e['offset']);
+			// same 5 results
+			$this->assertEqual($e['index'], $j + 4 - (floor($j / 5) * 5));
+			$j++;
+		}
+
+		$this->assertEqual(11, $j);
+	}
+
+	static function test_elgg_batch_callback($options, $reset = false) {
+		static $count = 1;
+
+		if ($reset) {
+			$count = 1;
+			return true;
+		}
+
+		if ($count > 20) {
+			return false;
+		}
+
+		for ($j = 0; ($options['limit'] < 5) ? $j < $options['limit'] : $j < 5; $j++) {
+			$return[] = array(
+				'offset' => $options['offset'],
+				'limit' => $options['limit'],
+				'count' => $count++,
+				'index' => 1 + $options['offset'] + $j
+			);
+		}
+
+		return $return;
+	}
 }
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