New client features: non-interactive shell, shell commands, csv format

Summary:
If the `STDIN_FILENO` is a `TTY`, then an interactive command prompt
is shown. Otherwise, client runs in non-interactive mode.
Shell commands start with a colon sign, and end at the end of
line.
Csv and tabular output formats are supported.

Reviewers: teon.banek, mferencevic

Reviewed By: teon.banek, mferencevic

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D1633

src/communication/bolt/v1/value.cpp

@@ -1,6 +1,7 @@
 #include "communication/bolt/v1/value.hpp"
 
 #include "utils/algorithm.hpp"
+#include "utils/string.hpp"
 
 namespace communication::bolt {
 
@@ -330,7 +331,7 @@ std::ostream &operator<<(std::ostream &os, const Value &value) {
     case Value::Type::Double:
       return os << value.ValueDouble();
     case Value::Type::String:
-      return os << value.ValueString();
+      return os << utils::Escape(value.ValueString());
     case Value::Type::List:
       os << "[";
       utils::PrintIterable(os, value.ValueList());

src/utils/string.hpp

@@ -335,4 +335,32 @@ inline std::string RandomString(size_t length) {
     str[i] = charset[rand_dist(pseudo_rand_gen)];
   return str;
 }
+
+/// Escapes all whitespace and quotation characters to produce a string
+/// which can be used as a string literal.
+inline std::string Escape(const std::string &src) {
+  std::string ret;
+  ret.reserve(src.size() + 2);
+  ret.append(1, '"');
+  for (auto c : src) {
+    if (c == '\\' || c == '\'' || c == '"') {
+      ret.append(1, '\\');
+      ret.append(1, c);
+    } else if (c == '\b') {
+      ret.append("\\b");
+    } else if (c == '\f') {
+      ret.append("\\f");
+    } else if (c == '\n') {
+      ret.append("\\n");
+    } else if (c == '\r') {
+      ret.append("\\r");
+    } else if (c == '\t') {
+      ret.append("\\t");
+    } else {
+      ret.append(1, c);
+    }
+  }
+  ret.append(1, '"');
+  return ret;
+}
 }  // namespace utils

tools/src/CMakeLists.txt

@@ -6,6 +6,11 @@ target_link_libraries(mg_import_csv mg-single-node kvstore_dummy_lib)
 add_executable(mg_statsd mg_statsd/main.cpp)
 target_link_libraries(mg_statsd mg-communication mg-io mg-utils mg-stats)
 
+# Generate a version.hpp file
+set(VERSION_STRING ${memgraph_VERSION})
+configure_file(../../src/version.hpp.in version.hpp @ONLY)
+include_directories(${CMAKE_CURRENT_BINARY_DIR})
+
 # Memgraph Client Target
 add_executable(mg_client mg_client/main.cpp)
 set(CLIENT_LIBS mg-communication mg-io mg-utils)
@@ -14,6 +19,7 @@ if (READLINE_FOUND)
 endif()
 target_link_libraries(mg_client ${CLIENT_LIBS})
 
+
 # Strip the executable in release build.
 string(TOLOWER ${CMAKE_BUILD_TYPE} lower_build_type)
 if (lower_build_type STREQUAL "release")

tools/src/mg_client/main.cpp

@@ -2,7 +2,9 @@
 #include <glog/logging.h>
 
 #include <pwd.h>
+#include <signal.h>
 #include <sys/ioctl.h>
+#include <termios.h>
 #include <unistd.h>
 #include <algorithm>
 #include <experimental/filesystem>
@@ -12,18 +14,82 @@
 #include "communication/bolt/client.hpp"
 #include "io/network/endpoint.hpp"
 #include "io/network/utils.hpp"
+#include "utils/algorithm.hpp"
 #include "utils/file.hpp"
+#include "utils/flag_validation.hpp"
+#include "utils/signals.hpp"
 #include "utils/string.hpp"
+#include "utils/terminate_handler.hpp"
+#include "utils/timer.hpp"
+#include "version.hpp"
 
 namespace fs = std::experimental::filesystem;
 
+volatile sig_atomic_t is_shutting_down = 0;
+
+// Usage strings.
+static const std::string kUsage =
+    "Memgraph bolt client.\n"
+    "The client can be run in interactive or non-interactive mode.\n";
+static const std::string kInteractiveUsage =
+    "In interactive mode, user can enter cypher queries and supported "
+    "commands.\n\n"
+    "Cypher queries can span through multiple lines and conclude with a\n"
+    "semi-colon (;). Each query is executed in the database and the results\n"
+    "are printed out.\n\n"
+    "The following interactive commands are supported:\n\n"
+    "\t:help\t Print out usage for interactive mode\n"
+    "\t:quit\t Exit the shell\n";
+
+// Supported commands.
+// Maybe also add reconnect?
+static const std::string kCommandQuit = ":quit";
+static const std::string kCommandHelp = ":help";
+
+// Supported formats.
+static const std::string kCsvFormat = "csv";
+static const std::string kTabularFormat = "tabular";
+
 DEFINE_string(host, "127.0.0.1",
-              "Server address. It can be a DNS resolveable hostname.");
+              "Server address. It can be a DNS resolvable hostname.");
 DEFINE_int32(port, 7687, "Server port");
 DEFINE_string(username, "", "Username for the database");
 DEFINE_string(password, "", "Password for the database");
-DEFINE_bool(use_ssl, true, "Set to true to connect with SSL to the server.");
+DEFINE_bool(use_ssl, true, "Use SSL when connecting to the server.");
 DEFINE_bool(fit_to_screen, false, "Fit output width to screen width.");
+DEFINE_VALIDATED_string(
+    output_format, "tabular",
+    "Query output format. Can be csv/tabular. If output format is "
+    "other than tabular `fit-to-screen` flag is ignored.",
+    {
+      if (value == kCsvFormat || value == kTabularFormat) {
+        return true;
+      }
+      return false;
+    });
+DEFINE_VALIDATED_string(csv_delimiter, ",",
+                        "Character used to separate fields.", {
+                          if (value.size() != 1) {
+                            return false;
+                          }
+                          return true;
+                        });
+DEFINE_string(
+    csv_escapechar, "",
+    "Character used to escape the quotechar(\") if csv-doublequote is false.");
+DEFINE_bool(
+    csv_doublequote, true,
+    "Controls how instances of quotechar(\") appearing inside a field should "
+    "themselves be quoted. When true, the character is doubled. When false, "
+    "the escapechar is used as a prefix to the quotechar. "
+    "If csv-doublequote is false 'csv-escapechar' must be set.");
+
+static bool ValidateCsvDoubleQuote() {
+  if (!FLAGS_csv_doublequote && FLAGS_csv_escapechar.size() != 1) {
+    return false;
+  }
+  return true;
+}
 
 #ifdef HAS_READLINE
 DEFINE_string(history, "~/.memgraph",
@@ -42,14 +108,47 @@ DECLARE_int32(min_log_level);
 // Unfinished query text from previous input.
 // e.g. Previous input was MATCH(n) RETURN n; MATCH
 // then default_text would be set to MATCH for next query.
-std::string default_text;
+static std::string default_text;
+
+static const std::string kPrompt = "memgraph> ";
+static const std::string kMultilinePrompt = "       -> ";
+
+static void PrintHelp() { std::cout << kInteractiveUsage << std::endl; }
+
+static void EchoFailure(const std::string &failure_msg,
+                        const std::string &explanation) {
+  if (isatty(STDIN_FILENO)) {
+    std::cout << "\033[1;31m" << failure_msg << ": \033[0m";
+    std::cout << explanation << std::endl;
+  } else {
+    std::cerr << failure_msg << ": ";
+    std::cerr << explanation << std::endl;
+  }
+}
+
+static void EchoInfo(const std::string &message) {
+  if (isatty(STDIN_FILENO)) {
+    std::cout << message << std::endl;
+  }
+}
+
+static void SetStdinEcho(bool enable = true) {
+  struct termios tty;
+  tcgetattr(STDIN_FILENO, &tty);
+  if (!enable) {
+    tty.c_lflag &= ~ECHO;
+  } else {
+    tty.c_lflag |= ECHO;
+  }
+  tcsetattr(STDIN_FILENO, TCSANOW, &tty);
+}
 
 #ifdef HAS_READLINE
 
 #include "readline/history.h"
 #include "readline/readline.h"
 
-/** Helper function that sets default input for 'readline'*/
+/// Helper function that sets default input for 'readline'
 static int SetDefaultText() {
   rl_insert_text(default_text.c_str());
   default_text = "";
@@ -57,9 +156,9 @@ static int SetDefaultText() {
   return 0;
 }
 
-/** Memgraph and OpenCypher keywords.
- *  Copied from src/query/frontend/opencypher/grammar/Cypher.g4
- *  and src/query/frontend/grammar/MemgraphCypher.g4 */
+/// Memgraph and OpenCypher keywords.
+/// Copied from src/query/frontend/opencypher/grammar/Cypher.g4
+/// and src/query/frontend/grammar/MemgraphCypher.g4
 static const std::vector<std::string> kMemgraphKeywords{
     "ALTER",    "AUTH",    "BATCH", "BATCHES", "CLEAR",     "DATA",
     "DENY",     "DROP",    "FOR",   "FROM",    "GRANT",     "IDENTIFIED",
@@ -125,14 +224,12 @@ static char **Completer(const char *text, int start, int end) {
   return rl_completion_matches(text, CompletionGenerator);
 }
 
-/**
- * Helper function that reads a line from the
- * standard input using the 'readline' lib.
- * Adds support for history and reverse-search.
- *
- * @param prompt The prompt to display.
- * @return  User input line, or nullopt on EOF.
- */
+/// Helper function that reads a line from the
+/// standard input using the 'readline' lib.
+/// Adds support for history and reverse-search.
+///
+/// @param prompt The prompt to display.
+/// @return  User input line, or nullopt on EOF.
 static std::experimental::optional<std::string> ReadLine(
     const std::string &prompt) {
   if (default_text.size() > 0) {
@@ -150,35 +247,38 @@ static std::experimental::optional<std::string> ReadLine(
 
 #else
 
-/** Helper function that reads a line from the standard input
- *  using getline.
- *  @param prompt The prompt to display.
- *  @return User input line, or nullopt on EOF.
- */
+/// Helper function that reads a line from the standard input
+/// using getline.
+/// @param prompt The prompt to display.
+/// @return User input line, or nullopt on EOF.
 static std::experimental::optional<std::string> ReadLine(
     const std::string &prompt) {
   std::cout << prompt << default_text;
   std::string line;
   std::getline(std::cin, line);
-  if (!isatty(STDIN_FILENO)) {
-    // Stupid hack to have same output as readline if stdin is redirected.
-    std::cout << line << std::endl;
-  }
+  if (std::cin.eof()) return std::experimental::nullopt;
   line = default_text + line;
   default_text = "";
-  if (std::cin.eof()) return std::experimental::nullopt;
   return line;
 }
 
 #endif  // HAS_READLINE
 
-/** Helper function that parses user line input.
- *  @param line user input line.
- *  @param quote quote character or '\0'; if set line is inside quotation.
- *  @param escaped if set, next character should be escaped.
- *  @return pair of string and bool. string is parsed line and bool marks
- *  if query finished(Query finishes with ';') with this line.
- */
+static std::experimental::optional<std::string> GetLine() {
+  std::string line;
+  std::getline(std::cin, line);
+  if (std::cin.eof()) return std::experimental::nullopt;
+  line = default_text + line;
+  default_text = "";
+  return line;
+}
+
+/// Helper function that parses user line input.
+/// @param line user input line.
+/// @param quote quote character or '\0'; if set line is inside quotation.
+/// @param escaped if set, next character should be escaped.
+/// @return pair of string and bool. string is parsed line and bool marks
+/// if query finished(Query finishes with ';') with this line.
 static std::pair<std::string, bool> ParseLine(const std::string &line,
                                               char *quote, bool *escaped) {
   // Parse line.
@@ -204,8 +304,7 @@ static std::pair<std::string, bool> ParseLine(const std::string &line,
   return std::make_pair(parsed_line.str(), is_done);
 }
 
-static std::experimental::optional<std::string> GetQuery(
-    const std::string &prompt) {
+static std::experimental::optional<std::string> GetQuery() {
   char quote = '\0';
   bool escaped = false;
   auto ret = ParseLine(default_text, &quote, &escaped);
@@ -215,19 +314,39 @@ static std::experimental::optional<std::string> GetQuery(
     return ret.first;
   }
   std::stringstream query;
-  std::string multiline_prompt("       -> ");
+  std::experimental::optional<std::string> line;
   int line_cnt = 0;
   auto is_done = false;
   while (!is_done) {
-    auto line = ReadLine(line_cnt == 0 ? prompt : multiline_prompt);
+    if (!isatty(STDIN_FILENO)) {
+      line = GetLine();
+    } else {
+      line = ReadLine(line_cnt == 0 ? kPrompt : kMultilinePrompt);
+      if (line_cnt == 0 && line && line->size() > 0 && (*line)[0] == ':') {
+        auto trimmed_line = utils::Trim(*line);
+        if (trimmed_line == kCommandQuit) {
+          return std::experimental::nullopt;
+        } else if (trimmed_line == kCommandHelp) {
+          PrintHelp();
+          return "";
+        } else {
+          EchoFailure("Unsupported command", trimmed_line);
+          PrintHelp();
+          return "";
+        }
+      }
+    }
     if (!line) return std::experimental::nullopt;
     if (line->empty()) continue;
     auto ret = ParseLine(*line, &quote, &escaped);
-    query << ret.first << " ";
+    query << ret.first;
     auto char_count = ret.first.size();
     if (ret.second) {
       is_done = true;
-      char_count += 1;
+      char_count += 1;  // ';' sign
+    } else {
+      // Query is multiline so append whitespace.
+      query << " ";
     }
     if (char_count < line->size()) {
       default_text = utils::Trim(line->substr(char_count));
@@ -238,9 +357,9 @@ static std::experimental::optional<std::string> GetQuery(
 }
 
 template <typename T>
-static void PrettyPrintData(const std::vector<T> &data, int total_width,
+static void PrintRowTabular(const std::vector<T> &data, int total_width,
                             int column_width, int num_columns,
-                            bool all_columns_fit) {
+                            bool all_columns_fit, int margin = 1) {
   if (!all_columns_fit) num_columns -= 1;
   std::string data_output = std::string(total_width, ' ');
   for (auto i = 0; i < total_width; i += column_width) {
@@ -250,11 +369,11 @@ static void PrettyPrintData(const std::vector<T> &data, int total_width,
       std::stringstream field;
       field << data[idx];  // convert Value to string
       std::string field_str(field.str());
-      if (field_str.size() > column_width - 1) {
-        field_str.erase(column_width - 1, std::string::npos);
+      if (field_str.size() > column_width - 2 * margin - 1) {
+        field_str.erase(column_width - 2 * margin - 1, std::string::npos);
         field_str.replace(field_str.size() - 3, 3, "...");
       }
-      data_output.replace(i + 1, field_str.size(), field_str);
+      data_output.replace(i + 1 + margin, field_str.size(), field_str);
     }
   }
   if (!all_columns_fit) {
@@ -264,25 +383,24 @@ static void PrettyPrintData(const std::vector<T> &data, int total_width,
   std::cout << data_output << std::endl;
 }
 
-/**
- * Helper function for determining maximum length of data.
- * @param data Vector of string representable elements. Elements should have
- * operator '<<' implemented.
- * @return length needed for representing max size element in vector. Plus
- * one is added because of column start character '|'.
- */
+/// Helper function for determining maximum length of data.
+/// @param data Vector of string representable elements. Elements should have
+/// operator '<<' implemented.
+/// @param margin Column margin width.
+/// @return length needed for representing max size element in vector. Plus
+/// one is added because of column start character '|'.
 template <typename T>
-static uint64_t GetMaxColumnWidth(const std::vector<T> &data) {
+static uint64_t GetMaxColumnWidth(const std::vector<T> &data, int margin = 1) {
   uint64_t column_width = 0;
   for (auto &elem : data) {
     std::stringstream field;
     field << elem;
-    column_width = std::max(column_width, field.str().size());
+    column_width = std::max(column_width, field.str().size() + 2 * margin);
   }
   return column_width + 1;
 }
 
-static void PrettyPrint(
+static void PrintTabular(
     const std::vector<std::string> &header,
     const std::vector<std::vector<communication::bolt::Value>> &records) {
   struct winsize w;
@@ -330,19 +448,91 @@ static void PrettyPrint(
   line_fill[total_width - 1] = '+';
   std::cout << line_fill << std::endl;
   // Print Header.
-  PrettyPrintData(header, total_width, column_width, num_columns,
+  PrintRowTabular(header, total_width, column_width, num_columns,
                   all_columns_fit);
   std::cout << line_fill << std::endl;
   // Print Records.
   for (size_t i = 0; i < records.size(); ++i) {
-    PrettyPrintData(records[i], total_width, column_width, num_columns,
+    PrintRowTabular(records[i], total_width, column_width, num_columns,
                     all_columns_fit);
   }
   std::cout << line_fill << std::endl;
 }
 
+template <typename T>
+static std::vector<std::string> FormatCsvFields(const std::vector<T> &fields) {
+  std::vector<std::string> formatted;
+  formatted.reserve(fields.size());
+  for (auto &field : fields) {
+    std::stringstream field_stream;
+    field_stream << field;
+    std::string formatted_field(field_stream.str());
+    if (FLAGS_csv_doublequote) {
+      formatted_field = utils::Replace(formatted_field, "\"", "\"\"");
+    } else {
+      formatted_field =
+          utils::Replace(formatted_field, "\"", FLAGS_csv_escapechar + "\"");
+    }
+    formatted_field.insert(0, 1, '"');
+    formatted_field.append(1, '"');
+    formatted.push_back(formatted_field);
+  }
+  return formatted;
+}
+
+static void PrintCsv(
+    const std::vector<std::string> &header,
+    const std::vector<std::vector<communication::bolt::Value>> &records) {
+  // Print Header.
+  auto formatted_header = FormatCsvFields(header);
+  utils::PrintIterable(std::cout, formatted_header, FLAGS_csv_delimiter);
+  std::cout << std::endl;
+  // Print Records.
+  for (size_t i = 0; i < records.size(); ++i) {
+    auto formatted_row = FormatCsvFields(records[i]);
+    utils::PrintIterable(std::cout, formatted_row, FLAGS_csv_delimiter);
+    std::cout << std::endl;
+  }
+}
+
+static void Output(
+    const std::vector<std::string> &header,
+    const std::vector<std::vector<communication::bolt::Value>> &records) {
+  if (FLAGS_output_format == kTabularFormat) {
+    PrintTabular(header, records);
+  } else if (FLAGS_output_format == kCsvFormat) {
+    PrintCsv(header, records);
+  }
+}
+
 int main(int argc, char **argv) {
+  gflags::SetVersionString(version_string);
+  gflags::SetUsageMessage(kUsage);
+
   gflags::ParseCommandLineFlags(&argc, &argv, true);
+  if (FLAGS_output_format == kCsvFormat && !ValidateCsvDoubleQuote()) {
+    EchoFailure(
+        "Unsupported combination of 'csv-doublequote' and 'csv-escapechar'\n"
+        "flags",
+        "Run './mg_client --help' for usage.");
+    return 1;
+  }
+  auto password = FLAGS_password;
+  if (isatty(STDIN_FILENO) && FLAGS_username.size() > 0 &&
+      password.size() == 0) {
+    SetStdinEcho(false);
+    auto password_optional = ReadLine("Password: ");
+    std::cout << std::endl;
+    if (password_optional) {
+      password = *password_optional;
+    } else {
+      EchoFailure(
+          "Password not submitted",
+          fmt::format("Requested password for username {}", FLAGS_username));
+      return 1;
+    }
+    SetStdinEcho(true);
+  }
   FLAGS_min_log_level = google::ERROR;
   google::InitGoogleLogging(argv[0]);
 
@@ -360,8 +550,7 @@ int main(int argc, char **argv) {
     history_dir = fs::path(pw->pw_dir) / kDefaultHistoryMemgraphDir;
   }
   if (!utils::EnsureDir(history_dir)) {
-    std::cout << fmt::format("History directory {} doesn't exist", history_dir)
-              << std::endl;
+    EchoFailure("History directory doesn't exist", history_dir);
     // Should program exit here or just continue with warning message?
     return 1;
   }
@@ -370,14 +559,53 @@ int main(int argc, char **argv) {
   if (fs::exists(history_file)) {
     auto ret = read_history(history_file.string().c_str());
     if (ret != 0) {
-      std::cout << fmt::format("Unable to read history file: {}", history_file);
+      EchoFailure("Unable to read history file", history_file);
       // Should program exit here or just continue with warning message?
       return 1;
     }
     history_len = history_length;
   }
+
+  // Save history function. Used to save readline history after each query.
+  auto save_history = [&history_len, history_file] {
+    if (!FLAGS_no_history) {
+      int ret = 0;
+      // If there was no history, create history file.
+      // Otherwise, append to existing history.
+      if (history_len == 0) {
+        ret = write_history(history_file.string().c_str());
+      } else {
+        ret = append_history(1, history_file.string().c_str());
+      }
+      if (ret != 0) {
+        EchoFailure("Unable to save history to file", history_file);
+        return 1;
+      }
+      ++history_len;
+    }
+    return 0;
+  };
 #endif
 
+  // Prevent handling shutdown inside a shutdown. For example, SIGINT handler
+  // being interrupted by SIGTERM before is_shutting_down is set, thus causing
+  // double shutdown.
+  sigset_t block_shutdown_signals;
+  sigemptyset(&block_shutdown_signals);
+  sigaddset(&block_shutdown_signals, SIGTERM);
+  sigaddset(&block_shutdown_signals, SIGINT);
+
+  auto shutdown = [](int exit_code = 0) {
+    if (is_shutting_down) return;
+    is_shutting_down = 1;
+    std::quick_exit(exit_code);
+  };
+
+  utils::SignalHandler::RegisterHandler(utils::Signal::Terminate, shutdown,
+                                        block_shutdown_signals);
+  utils::SignalHandler::RegisterHandler(utils::Signal::Interupt, shutdown,
+                                        block_shutdown_signals);
+
   // TODO handle endpoint exception.
   // It has CHECK in constructor if address is not valid.
   io::network::Endpoint endpoint(io::network::ResolveHostname(FLAGS_host),
@@ -385,27 +613,46 @@ int main(int argc, char **argv) {
   communication::ClientContext context(FLAGS_use_ssl);
   communication::bolt::Client client(&context);
 
-  if (!client.Connect(endpoint, FLAGS_username, FLAGS_password)) {
+  if (!client.Connect(endpoint, FLAGS_username, password)) {
     // Error message is logged in client.Connect method
     return 1;
   }
 
-  std::cout << "mg-client" << std::endl;
-  std::cout << fmt::format("Connected to 'memgraph://{}'", endpoint)
-            << std::endl;
+  EchoInfo("mg-client");
+  EchoInfo("Type :help for shell usage");
+  EchoInfo("Quit the shell by typing Ctrl-D(eof) or :quit");
+  EchoInfo(fmt::format("Connected to 'memgraph://{}'", endpoint));
   int num_retries = 3;
   while (true) {
-    auto query = GetQuery("memgraph> ");
+    auto query = GetQuery();
     if (!query) break;
     if (query->empty()) continue;
     try {
+      utils::Timer t;
       auto ret = client.Execute(*query, {});
-      PrettyPrint(ret.fields, ret.records);
+      auto elapsed = t.Elapsed().count();
+      if (ret.records.size() > 0) Output(ret.fields, ret.records);
+      if (isatty(STDIN_FILENO)) {
+        std::string summary;
+        if (ret.records.size() == 0) {
+          summary = "Empty set";
+        } else if (ret.records.size() == 1) {
+          summary = std::to_string(ret.records.size()) + " row in set";
+        } else {
+          summary = std::to_string(ret.records.size()) + " rows in set";
+        }
+        std::cout << summary << " (" << fmt::format("{:.2f}", elapsed)
+                  << " sec)" << std::endl;
+#ifdef HAS_READLINE
+        auto history_ret = save_history();
+        if (history_ret != 0) return history_ret;
+#endif
+      }
     } catch (const communication::bolt::ClientQueryException &e) {
-      std::cout << "Client received exception: " << e.what() << std::endl;
+      EchoFailure("Client received exception", e.what());
     } catch (const communication::bolt::ClientFatalException &e) {
-      std::cout << "Client received exception: " << e.what() << std::endl;
-      std::cout << "Trying to reconnect" << std::endl;
+      EchoFailure("Client received exception", e.what());
+      EchoInfo("Trying to reconnect");
       bool is_connected = false;
       client.Close();
       while (num_retries > 0) {
@@ -418,34 +665,13 @@ int main(int argc, char **argv) {
       }
       if (is_connected) {
         num_retries = 3;
-        std::cout << fmt::format("Connected to 'memgraph://{}'", endpoint)
-                  << std::endl;
+        EchoInfo(fmt::format("Connected to 'memgraph://{}'", endpoint));
       } else {
-        std::cout << fmt::format("Couldn't connect to 'memgraph://{}'",
-                                 endpoint)
-                  << std::endl;
+        EchoFailure("Couldn't connect to",
+                    fmt::format("'memgraph://{}'", endpoint));
         return 1;
       }
     }
   }
-
-#if HAS_READLINE
-  int curr_len = history_length;
-  if (!FLAGS_no_history && curr_len - history_len > 0) {
-    int ret = 0;
-    // If there was no history, create history file.
-    // Otherwise, append to existing history.
-    if (history_len == 0) {
-      ret = write_history(history_file.string().c_str());
-    } else {
-      ret =
-          append_history(curr_len - history_len, history_file.string().c_str());
-    }
-    if (ret != 0) {
-      std::cout << "Unable to save history" << std::endl;
-      return 1;
-    }
-  }
-#endif
   return 0;
 }

tools/tests/client/input/multiple_columns.txt

@@ -0,0 +1 @@
+CREATE (n:Node)-[e:Edge]->(m:Vertex) RETURN n,e,m;

tools/tests/client/output_csv/escaping.txt

@@ -0,0 +1,2 @@
+"n"
+"(:Node {tmp: ""\""\\;\\""})"

tools/tests/client/output_csv/multiline_query.txt

@@ -0,0 +1,12 @@
+"n"
+"(:Constantine {quote: ""In hoc signo vinces""})"
+"n"
+"(:Constantine {quote: ""In hoc signo vinces""})"
+"n"
+"(:Erdody {quote: ""Regnum regno non praescribit leges""})"
+"n"
+"(:Erdody {quote: ""Regnum regno non praescribit leges""})"
+"n"
+"(:Caesar {quote: ""Alea iacta est""})"
+"n"
+"(:Caesar {quote: ""Alea iacta est""})"

tools/tests/client/output_csv/multiple_columns.txt

@@ -0,0 +1,2 @@
+"n","e","m"
+"(:Node)","[Edge]","(:Vertex)"

tools/tests/client/output_csv/multiple_queries_per_line.txt

@@ -0,0 +1,6 @@
+"n"
+"(:Node)"
+"n"
+"(:Vertex)"
+"n"
+"(:Vertex)"

tools/tests/client/output_csv/query_per_line.txt

@@ -0,0 +1,8 @@
+"n"
+"(:Node)"
+"n"
+"(:Node)"
+"n"
+"(:Vertex)"
+"n"
+"(:Vertex)"

tools/tests/client/output_csv/quote.txt

@@ -0,0 +1,10 @@
+"n"
+"(:Ciceron {quote: ""o tempora o mores""})"
+"n"
+"(:Ciceron {quote: ""o tempora o mores!""})"
+"n"
+"(:Ciceron {quote: ""o tempora \'o mores\'""})"
+"n"
+"(:Ciceron {quote: ""o tempora \""o mores\""""})"
+"n"
+"(:Ciceron {quote: ""o tempora \""o mores\""""})"

tools/tests/client/output_csv/unfinished_query.txt

@@ -0,0 +1,12 @@
+"n"
+"(:Ovid {quote: ""Exitus Acta Probat""})"
+"n"
+"(:Ovid {quote: ""Exitus Acta Probat""})"
+"n"
+"(:Ovid {quote: ""Exitus Acta Probat""})"
+"n"
+"(:Bible {quote: ""Fiat Lux""})"
+"n"
+"(:Plinius {quote: ""In vino veritas""})"
+"n"
+"(:Plinius {quote: ""In vino veritas""})"

tools/tests/client/output_escaping.txt

@@ -1,9 +0,0 @@
-mg-client
-Connected to 'memgraph://127.0.0.1:7687'
-memgraph> CREATE (n:Node{tmp:"\"\\;\\"}) RETURN n;
-+-------------------+
-|n                  |
-+-------------------+
-|(:Node {tmp: "\;\})|
-+-------------------+
-memgraph> 

tools/tests/client/output_multiline_query.txt

@@ -1,49 +0,0 @@
-mg-client
-Connected to 'memgraph://127.0.0.1:7687'
-memgraph> CREATE (n:Constantine{quote:"In hoc signo vinces"})
-       -> RETURN n;
-+-------------------------------------------+
-|n                                          |
-+-------------------------------------------+
-|(:Constantine {quote: In hoc signo vinces})|
-+-------------------------------------------+
-memgraph> MATCH
-       -> (n)
-       -> RETURN
-       -> n;
-+-------------------------------------------+
-|n                                          |
-+-------------------------------------------+
-|(:Constantine {quote: In hoc signo vinces})|
-+-------------------------------------------+
-memgraph> CREATE (n:Erdody{quote:
-       -> "Regnum regno non praescribit leges"})
-       -> RETURN
-       -> n;
-+-----------------------------------------------------+
-|n                                                    |
-+-----------------------------------------------------+
-|(:Erdody {quote: Regnum regno non praescribit leges})|
-+-----------------------------------------------------+
-memgraph> MATCH (n:Erdody) RETURN
-       -> n;
-+-----------------------------------------------------+
-|n                                                    |
-+-----------------------------------------------------+
-|(:Erdody {quote: Regnum regno non praescribit leges})|
-+-----------------------------------------------------+
-memgraph> CREATE (n:Caesar{quote:"Alea iacta
-       -> est"}) RETURN n;
-+---------------------------------+
-|n                                |
-+---------------------------------+
-|(:Caesar {quote: Alea iacta est})|
-+---------------------------------+
-memgraph> MATCH (n:Caesar)
-       -> RETURN n;
-+---------------------------------+
-|n                                |
-+---------------------------------+
-|(:Caesar {quote: Alea iacta est})|
-+---------------------------------+
-memgraph> 

tools/tests/client/output_multiple_queries_per_line.txt

@@ -1,19 +0,0 @@
-mg-client
-Connected to 'memgraph://127.0.0.1:7687'
-memgraph> CREATE (n:Node) RETURN n; CREATE (n:Vertex) RETURN n; MATCH (n:Vertex) RETURN n;
-+-------+
-|n      |
-+-------+
-|(:Node)|
-+-------+
-+---------+
-|n        |
-+---------+
-|(:Vertex)|
-+---------+
-+---------+
-|n        |
-+---------+
-|(:Vertex)|
-+---------+
-memgraph> 

tools/tests/client/output_query_per_line.txt

@@ -1,27 +0,0 @@
-mg-client
-Connected to 'memgraph://127.0.0.1:7687'
-memgraph> CREATE (n:Node) RETURN n;
-+-------+
-|n      |
-+-------+
-|(:Node)|
-+-------+
-memgraph> MATCH (n:Node) RETURN n;
-+-------+
-|n      |
-+-------+
-|(:Node)|
-+-------+
-memgraph> CREATE (n:Vertex) RETURN n;
-+---------+
-|n        |
-+---------+
-|(:Vertex)|
-+---------+
-memgraph> MATCH (n:Vertex) RETURN n;
-+---------+
-|n        |
-+---------+
-|(:Vertex)|
-+---------+
-memgraph> 

tools/tests/client/output_quote.txt

@@ -1,33 +0,0 @@
-mg-client
-Connected to 'memgraph://127.0.0.1:7687'
-memgraph> CREATE (n:Ciceron{quote:"o tempora o mores"}) RETURN n;
-+-------------------------------------+
-|n                                    |
-+-------------------------------------+
-|(:Ciceron {quote: o tempora o mores})|
-+-------------------------------------+
-memgraph> CREATE (n:Ciceron{quote:'o tempora o mores!'}) RETURN n;
-+--------------------------------------+
-|n                                     |
-+--------------------------------------+
-|(:Ciceron {quote: o tempora o mores!})|
-+--------------------------------------+
-memgraph> CREATE (n:Ciceron{quote:"o tempora 'o mores'"}) RETURN n;
-+---------------------------------------+
-|n                                      |
-+---------------------------------------+
-|(:Ciceron {quote: o tempora 'o mores'})|
-+---------------------------------------+
-memgraph> CREATE (n:Ciceron{quote:'o tempora "o mores"'}) RETURN n;
-+---------------------------------------+
-|n                                      |
-+---------------------------------------+
-|(:Ciceron {quote: o tempora "o mores"})|
-+---------------------------------------+
-memgraph> CREATE (n:Ciceron{quote:"o tempora \"o mores\""}) RETURN n;
-+---------------------------------------+
-|n                                      |
-+---------------------------------------+
-|(:Ciceron {quote: o tempora "o mores"})|
-+---------------------------------------+
-memgraph> 

tools/tests/client/output_tabular/escaping.txt

@@ -0,0 +1,5 @@
++------------------------+
+| n                      |
++------------------------+
+|(:Node {tmp: "\"\\;\\"})|
++------------------------+

tools/tests/client/output_tabular/multiline_query.txt

@@ -0,0 +1,30 @@
++---------------------------------------------+
+| n                                           |
++---------------------------------------------+
+|(:Constantine {quote: "In hoc signo vinces"})|
++---------------------------------------------+
++---------------------------------------------+
+| n                                           |
++---------------------------------------------+
+|(:Constantine {quote: "In hoc signo vinces"})|
++---------------------------------------------+
++-------------------------------------------------------+
+| n                                                     |
++-------------------------------------------------------+
+|(:Erdody {quote: "Regnum regno non praescribit leges"})|
++-------------------------------------------------------+
++-------------------------------------------------------+
+| n                                                     |
++-------------------------------------------------------+
+|(:Erdody {quote: "Regnum regno non praescribit leges"})|
++-------------------------------------------------------+
++-----------------------------------+
+| n                                 |
++-----------------------------------+
+|(:Caesar {quote: "Alea iacta est"})|
++-----------------------------------+
++-----------------------------------+
+| n                                 |
++-----------------------------------+
+|(:Caesar {quote: "Alea iacta est"})|
++-----------------------------------+

tools/tests/client/output_tabular/multiple_columns.txt

@@ -0,0 +1,5 @@
++---------+---------+---------+
+| n       | e       | m       |
++---------+---------+---------+
+|(:Node)  |[Edge]   |(:Vertex)|
++---------+---------+---------+

tools/tests/client/output_tabular/multiple_queries_per_line.txt

@@ -0,0 +1,15 @@
++-------+
+| n     |
++-------+
+|(:Node)|
++-------+
++---------+
+| n       |
++---------+
+|(:Vertex)|
++---------+
++---------+
+| n       |
++---------+
+|(:Vertex)|
++---------+

tools/tests/client/output_tabular/query_per_line.txt

@@ -0,0 +1,20 @@
++-------+
+| n     |
++-------+
+|(:Node)|
++-------+
++-------+
+| n     |
++-------+
+|(:Node)|
++-------+
++---------+
+| n       |
++---------+
+|(:Vertex)|
++---------+
++---------+
+| n       |
++---------+
+|(:Vertex)|
++---------+

tools/tests/client/output_tabular/quote.txt

@@ -0,0 +1,25 @@
++---------------------------------------+
+| n                                     |
++---------------------------------------+
+|(:Ciceron {quote: "o tempora o mores"})|
++---------------------------------------+
++----------------------------------------+
+| n                                      |
++----------------------------------------+
+|(:Ciceron {quote: "o tempora o mores!"})|
++----------------------------------------+
++-------------------------------------------+
+| n                                         |
++-------------------------------------------+
+|(:Ciceron {quote: "o tempora \'o mores\'"})|
++-------------------------------------------+
++-------------------------------------------+
+| n                                         |
++-------------------------------------------+
+|(:Ciceron {quote: "o tempora \"o mores\""})|
++-------------------------------------------+
++-------------------------------------------+
+| n                                         |
++-------------------------------------------+
+|(:Ciceron {quote: "o tempora \"o mores\""})|
++-------------------------------------------+

tools/tests/client/output_tabular/unfinished_query.txt

@@ -0,0 +1,30 @@
++-------------------------------------+
+| n                                   |
++-------------------------------------+
+|(:Ovid {quote: "Exitus Acta Probat"})|
++-------------------------------------+
++-------------------------------------+
+| n                                   |
++-------------------------------------+
+|(:Ovid {quote: "Exitus Acta Probat"})|
++-------------------------------------+
++-------------------------------------+
+| n                                   |
++-------------------------------------+
+|(:Ovid {quote: "Exitus Acta Probat"})|
++-------------------------------------+
++----------------------------+
+| n                          |
++----------------------------+
+|(:Bible {quote: "Fiat Lux"})|
++----------------------------+
++-------------------------------------+
+| n                                   |
++-------------------------------------+
+|(:Plinius {quote: "In vino veritas"})|
++-------------------------------------+
++-------------------------------------+
+| n                                   |
++-------------------------------------+
+|(:Plinius {quote: "In vino veritas"})|
++-------------------------------------+

tools/tests/client/output_unfinished_query.txt

@@ -1,39 +0,0 @@
-mg-client
-Connected to 'memgraph://127.0.0.1:7687'
-memgraph> CREATE (n:Ovid{quote:"Exitus Acta Probat"}) RETURN n; MATCH (n)
-+-----------------------------------+
-|n                                  |
-+-----------------------------------+
-|(:Ovid {quote: Exitus Acta Probat})|
-+-----------------------------------+
-memgraph> MATCH (n)RETURN n;
-+-----------------------------------+
-|n                                  |
-+-----------------------------------+
-|(:Ovid {quote: Exitus Acta Probat})|
-+-----------------------------------+
-memgraph> MATCH (n) RETURN n; CREATE (n:Bible{quote:"Fiat Lux"}) RETURN n; CREATE (n:Plinius{quote:"In vino veritas"}) RETURN n; MATCH
-+-----------------------------------+
-|n                                  |
-+-----------------------------------+
-|(:Ovid {quote: Exitus Acta Probat})|
-+-----------------------------------+
-+--------------------------+
-|n                         |
-+--------------------------+
-|(:Bible {quote: Fiat Lux})|
-+--------------------------+
-+-----------------------------------+
-|n                                  |
-+-----------------------------------+
-|(:Plinius {quote: In vino veritas})|
-+-----------------------------------+
-memgraph> MATCH(n:Plinius)
-       -> RETURN
-       -> n;
-+-----------------------------------+
-|n                                  |
-+-----------------------------------+
-|(:Plinius {quote: In vino veritas})|
-+-----------------------------------+
-memgraph> 

tools/tests/test_mg_client

@@ -40,10 +40,17 @@ if [ ! -d $client_dir ]; then
     exit 1
 fi
 
-# Find tests input files.
+# Find tests dir.
 tests_dir="$DIR/client"
 if [ ! -d $tests_dir ]; then
-    echo_failure "Directory with tests input not found"
+    echo_failure "Directory with tests not found"
+    exit 1
+fi
+
+# Find tests input files.
+input_dir="$tests_dir/input"
+if [ ! -d $input_dir ]; then
+    echo_failure "Directory with tests input files not found"
     exit 1
 fi
 
@@ -65,26 +72,34 @@ echo  # Blank line
 
 client_flags="--use-ssl=false"
 test_code=0
-for filename in $tests_dir/input_*.txt; do
-    test_name=$(basename $filename)
-    test_name=${test_name#*_}
-    test_name=${test_name%.*}
-    output_name="output_$test_name.txt"
+for output_dir in $tests_dir/output_*; do
+    for filename in $input_dir/*; do
+        test_name=$(basename $filename)
+        test_name=${test_name%.*}
+        output_name="$test_name.txt"
 
-    echo_info "Running test $test_name"
-    $client_dir/mg_client $client_flags < $filename > $tmpdir/$test_name
-    diff -b $tmpdir/$test_name $tests_dir/$output_name
-    test_code=$?
+        output_format=$(basename $output_dir)
+        output_format=${output_format#*_}
+        run_flags="$client_flags --output-format=$output_format"
+
+        echo_info "Running test '$test_name' with $output_format output"
+        $client_dir/mg_client $run_flags < $filename > $tmpdir/$test_name
+        diff -b $tmpdir/$test_name $output_dir/$output_name
+        test_code=$?
+        if [ $test_code -ne 0 ]; then
+            echo_failure "Test '$test_name' with $output_format output failed"
+            break
+        else
+            echo_success "Test '$test_name' with $output_format output passed"
+        fi
+
+        # Clear database for each test.
+        $client_dir/mg_client $client_flags <<< "MATCH (n) DETACH DELETE n;" \
+                                &> /dev/null || exit 1
+    done
     if [ $test_code -ne 0 ]; then
-        echo_failure "Test $test_name failed"
         break
-    else
-        echo_success "Test $test_name passed"
     fi
-
-    # Clear database for each test.
-    $client_dir/mg_client $client_flags <<< "MATCH (n) DETACH DELETE n;" \
-                            &> /dev/null || exit 1
 done