Add more tests on exported (PHP) Generator objects

tests/generators_to_v8_001.phpt

@@ -0,0 +1,30 @@
+--TEST--
+Test V8::executeString() : Generators PHP -> V8 (instantite in JS)
+--SKIPIF--
+<?php require_once(dirname(__FILE__) . '/skipif.inc'); ?>
+--FILE--
+<?php
+
+$js = <<<EOJS
+for(var i of PHP.Gen()) {
+    var_dump(i);
+}
+EOJS;
+
+$v8 = new V8Js();
+$v8->Gen = function() {
+    for($i = 0; $i < 4; $i ++) {
+        yield $i;
+    }
+};
+
+$v8->executeString($js);
+
+?>
+===EOF===
+--EXPECTF--
+int(0)
+int(1)
+int(2)
+int(3)
+===EOF===

tests/generators_to_v8_002.phpt

@@ -0,0 +1,28 @@
+--TEST--
+Test V8::executeString() : Generators PHP -> V8 (instantiate in JS, iterate in PHP)
+--SKIPIF--
+<?php require_once(dirname(__FILE__) . '/skipif.inc'); ?>
+--FILE--
+<?php
+
+$v8 = new V8Js();
+$v8->Gen = function() {
+    for($i = 0; $i < 4; $i ++) {
+        yield $i;
+    }
+};
+
+$gen = $v8->executeString('(PHP.Gen())');
+
+foreach($gen as $i) {
+    var_dump($i);
+}
+
+?>
+===EOF===
+--EXPECTF--
+int(0)
+int(1)
+int(2)
+int(3)
+===EOF===

tests/generators_to_v8_003.phpt

@@ -0,0 +1,47 @@
+--TEST--
+Test V8::executeString() : Generators PHP -> V8 (instantiate in JS, iterate in PHP)
+--SKIPIF--
+<?php require_once(dirname(__FILE__) . '/skipif.inc'); ?>
+--FILE--
+<?php
+
+$v8 = new V8Js();
+$v8->Gen = function() {
+    for($i = 0; $i < 6; $i ++) {
+        yield $i;
+    }
+};
+
+$JS = <<<EOJS
+var g = PHP.Gen();
+var_dump(g.next());
+var_dump(g.next());
+(g);
+EOJS;
+
+$gen = $v8->executeString($JS);
+
+foreach($gen as $i) {
+    var_dump($i);
+}
+
+?>
+===EOF===
+--EXPECTF--
+object(Object)#%d (2) {
+  ["value"] =>
+  int(0)
+  ["done"] =>
+  bool(false)
+}
+object(Object)#%d (2) {
+  ["value"] =>
+  int(1)
+  ["done"] =>
+  bool(false)
+}
+int(2)
+int(3)
+int(4)
+int(5)
+===EOF===

tests/generators_to_v8_004.phpt

@@ -0,0 +1,48 @@
+--TEST--
+Test V8::executeString() : Generators PHP -> V8 (yield from)
+--SKIPIF--
+<?php require_once(dirname(__FILE__) . '/skipif.inc'); ?>
+--FILE--
+<?php
+
+function FibonacciGenerator()
+{
+    $i = 0;
+    $j = 1;
+    for(;;) {
+        yield $j;
+        list($i, $j) = array($j, $i + $j);
+    }
+}
+
+$v8 = new V8Js();
+$v8->fibs = FibonacciGenerator();
+
+$JS = <<<EOJS
+function* prefixer() {
+    yield* arguments;
+    yield* PHP.fibs;
+}
+
+var gen = prefixer(23, 42);
+
+for(var i = 0; i < 10; i ++) {
+    var_dump(gen.next().value);
+}
+EOJS;
+
+$v8->executeString($JS);
+?>
+===EOF===
+--EXPECT--
+int(23)
+int(42)
+int(1)
+int(1)
+int(2)
+int(3)
+int(5)
+int(8)
+int(13)
+int(21)
+===EOF===