MXS-2644 Move ci setup from constructor to setup() function

By moving the setting up of the test environment from the constructor
to a separate setup()-function, it is possible to introduce virtual
functions and make it easier to do things differently depending on
whether the backend is MariaDB, Galera och Clustrix.

maxscale-system-test/mariadb_nodes.cpp

@@ -35,31 +35,37 @@ void Mariadb_nodes::require_gtid(bool value)
     g_require_gtid = value;
 }
 
-Mariadb_nodes::Mariadb_nodes(const char *pref, const char *test_cwd, bool verbose,
-                             std::string network_config):
-    v51(false)
+Mariadb_nodes::Mariadb_nodes(const char* pref,
+                             const char* test_cwd,
+                             bool verbose,
+                             const std::string& network_config)
+    : Nodes(pref, network_config, verbose)
+    , no_set_pos(false)
+    , v51(false)
+    , cnf_server_name(std::string(this->prefix) + std::string("_server"))
 {
-    use_ipv6 = false;
-    strcpy(prefix, pref);
     memset(this->nodes, 0, sizeof(this->nodes));
-    memset(blocked, 0, sizeof(blocked));
-    no_set_pos = false;
-    this->verbose = verbose;
-    this->network_config = network_config;
-    strcpy(test_dir, test_cwd);
+    memset(this->blocked, 0, sizeof(this->blocked));
+    strcpy(this->test_dir, test_cwd);
+
+    if (strcmp(this->prefix, "node") == 0)
+    {
+        cnf_server_name = std::string("server");
+    }
+    if (strcmp(this->prefix, "galera") == 0)
+    {
+        cnf_server_name = std::string("gserver");
+    }
+}
+
+bool Mariadb_nodes::setup()
+{
     read_env();
     truncate_mariadb_logs();
     flush_hosts();
     close_active_connections();
-    cnf_server_name = std::string(prefix) + std::string("_server");
-    if (strcmp(prefix, "node") == 0)
-    {
-        cnf_server_name = std::string("server");
-    }
-    if (strcmp(prefix, "galera") == 0)
-    {
-        cnf_server_name = std::string("gserver");
-    }
+
+    return true;
 }
 
 Mariadb_nodes::~Mariadb_nodes()

maxscale-system-test/mariadb_nodes.h

@@ -35,7 +35,9 @@ public:
      * @brief Constructor
      * @param pref  name of backend setup (like 'repl' or 'galera')
      */
-    Mariadb_nodes(const char *pref, const char *test_cwd, bool verbose, std::string network_config);
+    Mariadb_nodes(const char *pref, const char *test_cwd, bool verbose, const std::string& network_config);
+
+    bool setup() override;
 
     virtual ~Mariadb_nodes();
 
@@ -525,8 +527,8 @@ class Galera_nodes : public Mariadb_nodes
 {
 public:
 
-    Galera_nodes(const char *pref, const char *test_cwd, bool verbose, std::string network_config) :
-        Mariadb_nodes(pref, test_cwd, verbose, network_config) { }
+    Galera_nodes(const char *pref, const char *test_cwd, bool verbose, const std::string& network_config)
+        : Mariadb_nodes(pref, test_cwd, verbose, network_config) { }
 
     int start_galera();
 

maxscale-system-test/maxscales.cpp

@@ -4,15 +4,19 @@
 #include <string>
 #include "envv.h"
 
-Maxscales::Maxscales(const char *pref, const char *test_cwd, bool verbose,
-                     std::string network_config)
+Maxscales::Maxscales(const char *pref,
+                     const char *test_cwd,
+                     bool verbose,
+                     const std::string& network_config)
+    : Nodes(pref, network_config, verbose)
+    , valgring_log_num(0)
 {
-    strcpy(prefix, pref);
-    this->verbose = verbose;
-    valgring_log_num = 0;
-    strcpy(test_dir, test_cwd);
-    this->network_config = network_config;
-    read_env();
+    strcpy(this->test_dir, test_cwd);
+}
+
+bool Maxscales::setup()
+{
+    read_env(); // Sets e.g. use_valgrind.
     if (this->use_valgrind)
     {
         for (int i = 0; i < N; i++)
@@ -23,6 +27,7 @@ Maxscales::Maxscales(const char *pref, const char *test_cwd, bool verbose,
             ssh_node_f(i, true, "rm -rf /var/cache/maxscale/maxscale.lock");
         }
     }
+    return true;
 }
 
 int Maxscales::read_env()

maxscale-system-test/maxscales.h

@@ -21,7 +21,9 @@ public:
     };
 
     Maxscales(const char *pref, const char *test_cwd, bool verbose,
-              std::string network_config);
+              const std::string& network_config);
+
+    bool setup() override;
 
     int read_env();
 

maxscale-system-test/nodes.cpp

@@ -9,8 +9,13 @@
 
 #include "envv.h"
 
-Nodes::Nodes()
+Nodes::Nodes(const char* pref,
+             const std::string& network_config,
+             bool verbose)
+    : network_config(network_config)
+    , verbose(verbose)
 {
+    strcpy(this->prefix, pref);
 }
 
 bool Nodes::check_node_ssh(int node)

maxscale-system-test/nodes.h

@@ -14,7 +14,12 @@ typedef std::set<std::string> StringSet;
 class Nodes
 {
 public:
-    Nodes();
+    /**
+     * Sets up the nodes. *Must* be called before instance is used.
+     *
+     * @return True, if the instance could be setup, false otherwise.
+     */
+    virtual bool setup() = 0;
 
     char * IP[256];
     /**
@@ -31,7 +36,7 @@ public:
      * @brief use_ipv6 If true IPv6 addresses will be used to connect Maxscale and backed
      * Also IPv6 addresses go to maxscale.cnf
      */
-    bool use_ipv6;
+    bool use_ipv6 = false;
 
     /**
      * @brief  Path to ssh key for every backend node
@@ -205,6 +210,11 @@ public:
      */
     int stop_vm(int node);
 
+protected:
+    Nodes(const char* pref,
+          const std::string& network_config,
+          bool verbose);
+
 private:
     bool check_node_ssh(int node);
 };

maxscale-system-test/testconnections.cpp

@@ -371,6 +371,7 @@ TestConnections::TestConnections(int argc, char* argv[])
     if (!no_repl)
     {
         repl = new Mariadb_nodes("node", test_dir, verbose, network_config);
+        repl->setup();
         repl->use_ipv6 = use_ipv6;
         repl->take_snapshot_command = take_snapshot_command;
         repl->revert_snapshot_command = revert_snapshot_command;
@@ -384,7 +385,7 @@ TestConnections::TestConnections(int argc, char* argv[])
     if (!no_galera)
     {
         galera = new Galera_nodes("galera", test_dir, verbose, network_config);
-        //galera->use_ipv6 = use_ipv6;
+        galera->setup();
         galera->use_ipv6 = false;
         galera->take_snapshot_command = take_snapshot_command;
         galera->revert_snapshot_command = revert_snapshot_command;
@@ -398,7 +399,7 @@ TestConnections::TestConnections(int argc, char* argv[])
     if (!no_clustrix)
     {
         clustrix = new Clustrix_nodes("clustrix", test_dir, verbose, network_config);
-        //galera->use_ipv6 = use_ipv6;
+        clustrix->setup();
         clustrix->use_ipv6 = false;
         clustrix->take_snapshot_command = take_snapshot_command;
         clustrix->revert_snapshot_command = revert_snapshot_command;
@@ -410,6 +411,7 @@ TestConnections::TestConnections(int argc, char* argv[])
     }
 
     maxscales = new Maxscales("maxscale", test_dir, verbose, network_config);
+    maxscales->setup();
 
     bool maxscale_ok = maxscales->check_nodes();
     bool repl_ok = no_repl || repl_future.get();