PHPC-1342: Regression tests for duplicate keys (#1294)

Author: jmikola

tests/bson/bson-fromJSON-003.phpt

@@ -0,0 +1,18 @@
+--TEST--
+MongoDB\BSON\fromJSON(): Decoding JSON with duplicate field names
+--FILE--
+<?php
+
+require_once __DIR__ . '/../utils/basic.inc';
+
+/* Note: this is a regression test for libmongoc's JSON encoder. It is not
+ * advisable to use duplicate keys in BSON documents. */
+hex_dump(fromJSON('{ "foo": "bar", "foo": "baz" }'));
+
+?>
+===DONE===
+<?php exit(0); ?>
+--EXPECT--
+     0 : 1f 00 00 00 02 66 6f 6f 00 04 00 00 00 62 61 72  [.....foo.....bar]
+    10 : 00 02 66 6f 6f 00 04 00 00 00 62 61 7a 00 00     [..foo.....baz..]
+===DONE===

tests/bson/bson-toJSON-003.phpt

@@ -0,0 +1,17 @@
+--TEST--
+MongoDB\BSON\toJSON(): Encoding JSON with duplicate field names
+--FILE--
+<?php
+
+require_once __DIR__ . '/../utils/basic.inc';
+
+/* Note: this is a regression test for libmongoc's JSON encoder. It is not
+ * advisable to use duplicate keys in BSON documents. */
+echo toJSON(fromJSON('{ "foo": "bar", "foo": "baz" }')), "\n";
+
+?>
+===DONE===
+<?php exit(0); ?>
+--EXPECT--
+{ "foo" : "bar", "foo" : "baz" }
+===DONE===

tests/bson/bson-toPHP-012.phpt

@@ -0,0 +1,20 @@
+--TEST--
+MongoDB\BSON\toPHP(): Decoding BSON with duplicate field names
+--FILE--
+<?php
+
+require_once __DIR__ . '/../utils/basic.inc';
+
+/* Note: this is a regression test. It is not advisable to use duplicate keys in
+ * BSON documents. */
+var_dump(toPHP(fromJSON('{ "foo": "bar", "foo": "baz" }')));
+
+?>
+===DONE===
+<?php exit(0); ?>
+--EXPECTF--
+object(stdClass)#%d (%d) {
+  ["foo"]=>
+  string(3) "baz"
+}
+===DONE===