add get_structuring_element.phpt

Signed-off-by: MaleicAcid <CS_MaleicAcid@163.com>

Author: MaleicAcid

tests/get_structuring_element.phpt

@@ -0,0 +1,33 @@
+--TEST--
+get_structuring_element function test
+--SKIPIF--
+<?php if (!extension_loaded("opencv")) print "skip"; ?>
+--FILE--
+<?php
+namespace CV;
+
+$morph_elem = 2;
+$morph_size = 3;
+$element = getStructuringElement( $morph_elem, new Size( 2*$morph_size + 1, 2*$morph_size+1 ), new Point( $morph_size, $morph_size ));
+
+var_dump($element);
+$element->print();
+
+--EXPECT--
+object(CV\Mat)#3 (4) {
+  ["type":"CV\Mat":private]=>
+  int(0)
+  ["rows"]=>
+  int(7)
+  ["cols"]=>
+  int(7)
+  ["dims"]=>
+  int(2)
+}
+[  0,   0,   0,   1,   0,   0,   0;
+   0,   1,   1,   1,   1,   1,   0;
+   1,   1,   1,   1,   1,   1,   1;
+   1,   1,   1,   1,   1,   1,   1;
+   1,   1,   1,   1,   1,   1,   1;
+   0,   1,   1,   1,   1,   1,   0;
+   0,   0,   0,   1,   0,   0,   0]