Extend router alteration test

Extended the test to cover modifications to readconnroute as well as do
checks on detection of invalid parameters.

Also allowed modifications to router_options at runtime.

maxscale-system-test/alter_router.cpp

@@ -3,10 +3,14 @@
  */
 
 #include "testconnections.h"
+#include <vector>
+#include <iostream>
+#include <functional>
 
-int main(int argc, char** argv)
+#define TEST(a) {#a, a}
+
+void alter_readwritesplit(TestConnections& test)
 {
-    TestConnections test(argc, argv);
     test.maxscales->wait_for_monitor();
 
     // Open a connection before and after setting master_failure_mode to fail_on_write
@@ -51,6 +55,63 @@ int main(int argc, char** argv)
                 "Read to third connection should work: %s", third.error());
 
     test.repl->unblock_node(0);
+    test.maxscales->wait_for_monitor();
+}
+
+void alter_readconnroute(TestConnections& test)
+{
+    test.repl->connect();
+    std::string master_id = test.repl->get_server_id_str(0);
+    test.repl->disconnect();
+
+    Connection conn = test.maxscales->readconn_master();
+
+    for (int i = 0; i < 5; i++)
+    {
+        conn.connect();
+        Row row = conn.row("SELECT @@server_id");
+        conn.disconnect();
+        test.assert(row[0] == master_id, "First connection should use master: %s != %s",
+                    row[0].c_str(), master_id.c_str());
+    }
+
+    int rc = test.maxscales->ssh_node_f(0, true, "maxctrl alter service Read-Connection-Router-Master router_options slave");
+    test.assert(rc == 0, "Readconnroute alteration should work");
+
+    for (int i = 0; i < 5; i++)
+    {
+        conn.connect();
+        Row row = conn.row("SELECT @@server_id");
+        conn.disconnect();
+        test.assert(row[0] != master_id, "Second connection should not use master: %s == %s",
+                    row[0].c_str(), master_id.c_str());
+    }
+}
+
+void alter_unsupported(TestConnections& test)
+{
+    int rc = test.maxscales->ssh_node_f(0, true, "maxctrl alter service RW-Split-Router unknown parameter");
+    test.assert(rc != 0, "Unknown router parameter should be detected");
+    rc = test.maxscales->ssh_node_f(0, true, "maxctrl alter service RW-Split-Router filters Regex");
+    test.assert(rc != 0, "Unsupported router parameter should be detected");
+}
+
+int main(int argc, char** argv)
+{
+    TestConnections test(argc, argv);
+
+    std::vector<std::pair<const char*, std::function<void (TestConnections&)>>> tests =
+    {
+         TEST(alter_readwritesplit),
+         TEST(alter_readconnroute),
+         TEST(alter_unsupported)
+    };
+
+    for (auto& a: tests)
+    {
+        std::cout << a.first << std::endl;
+        a.second(test);
+    }
 
     return test.global_result;
 }