Resolved #54 - Implemented testDatasource() method for test connection to zabbix server.

zabbix/datasource.js

@@ -41,6 +41,21 @@ function (angular, _, kbn) {
       this.zabbixAPI = new ZabbixAPI(this.url, this.username, this.password, this.basicAuth, this.withCredentials);
     }
 
+    /**
+     * Test connection to Zabbix API
+     *
+     * @return {object} Connection status and Zabbix API version
+     */
+    ZabbixAPIDatasource.prototype.testDatasource = function() {
+      return this.zabbixAPI.getZabbixAPIVersion().then(function (apiVersion) {
+        return {
+          status: "success",
+          title: "Success",
+          message: "Zabbix API version: " + apiVersion
+        };
+      });
+    };
+
     /**
      * Calls for each panel in dashboard.
      *

zabbix/zabbixAPIWrapper.js

@@ -117,6 +117,42 @@ function (angular, _) {
     // API method wrappers //
     /////////////////////////
 
+    /**
+     * Request version of the Zabbix API.
+     *
+     * @return {string} Zabbix API version
+     */
+    p.getZabbixAPIVersion = function() {
+      var options = {
+        method: 'POST',
+        headers: {
+          'Content-Type': 'application/json'
+        },
+        url: this.url,
+        data: {
+          jsonrpc: '2.0',
+          method: 'apiinfo.version',
+          params: [],
+          id: 1
+        }
+      };
+
+      if (this.basicAuth || this.withCredentials) {
+        options.withCredentials = true;
+      }
+      if (this.basicAuth) {
+        options.headers = options.headers || {};
+        options.headers.Authorization = this.basicAuth;
+      }
+
+      return backendSrv.datasourceRequest(options).then(function (result) {
+        if (!result.data) {
+          return null;
+        }
+        return result.data.result;
+      });
+    };
+
     /**
      * Perform history query from Zabbix API
      *