Add tests

tests/conf.phpt

@@ -0,0 +1,61 @@
+--TEST--
+RdKafka\Conf
+--FILE--
+<?php
+
+$conf = new RdKafka\Conf();
+
+echo "Setting a string property\n";
+$conf->set("client.id", "acme");
+
+echo "Setting an integer property\n";
+$conf->set("message.max.bytes", 1 << 20);
+
+echo "Setting a boolean property\n";
+$conf->set("topic.metadata.refresh.sparse", "true");
+
+echo "Setting a boolean property to an invalid value\n";
+try {
+    $conf->set("topic.metadata.refresh.sparse", "xx");
+} catch(Exception $e) {
+    printf("Caught a %s: %s\n", get_class($e), $e->getMessage());
+}
+
+echo "Setting an invalid property\n";
+try {
+    $conf->set("invalid", "xx");
+} catch(Exception $e) {
+    printf("Caught a %s: %s\n", get_class($e), $e->getMessage());
+}
+
+echo "Setting error callback\n";
+$conf->setErrorCb(function () { });
+$dump = $conf->dump();
+var_dump(isset($dump["error_cb"]));
+
+echo "Dumping conf\n";
+var_dump(array_intersect_key($conf->dump(), array(
+    "client.id" => true,
+    "message.max.bytes" => true,
+    "topic.metadata.refresh.sparse" => true,
+)));
+
+--EXPECT--
+Setting a string property
+Setting an integer property
+Setting a boolean property
+Setting a boolean property to an invalid value
+Caught a RdKafka\Exception: Expected bool value for "topic.metadata.refresh.sparse": true or false
+Setting an invalid property
+Caught a RdKafka\Exception: No such configuration property: "invalid"
+Setting error callback
+bool(true)
+Dumping conf
+array(3) {
+  ["client.id"]=>
+  string(4) "acme"
+  ["message.max.bytes"]=>
+  string(7) "1048576"
+  ["topic.metadata.refresh.sparse"]=>
+  string(4) "true"
+}

tests/topic_conf.phpt

@@ -0,0 +1,12 @@
+--TEST--
+RdKafka\TopicConf
+--FILE--
+<?php
+
+$conf = new RdKafka\TopicConf();
+
+echo "Setting partitioner\n";
+$conf->setPartitioner(RD_KAFKA_MSG_PARTITIONER_RANDOM);
+
+--EXPECT--
+Setting partitioner