Merge branch 'master' into migrate_to_clients_test_image

Author: uglide

src/main/java/redis/clients/jedis/Jedis.java

@@ -8253,6 +8253,12 @@ public Map<String, CommandInfo> commandInfo(String... commands) {
     return CommandInfo.COMMAND_INFO_RESPONSE.build(connection.getOne());
   }
 
+  public Map<String, CommandInfo> command() {
+    checkIsInMultiOrPipeline();
+    connection.sendCommand(COMMAND);
+    return CommandInfo.COMMAND_INFO_RESPONSE.build(connection.getOne());
+  }
+
   public List<String> commandList() {
     checkIsInMultiOrPipeline();
     connection.sendCommand(COMMAND, LIST);

src/test/java/redis/clients/jedis/commands/jedis/ControlCommandsTest.java

@@ -513,6 +513,28 @@ public void commandGetKeysAndFlags() {
     assertEquals(2, keySandFlags.get(0).getValue().size());
   }
 
+
+  @Test
+  public void commandNoArgs() {
+    Map<String, CommandInfo> infos = jedis.command();
+
+    assertThat(infos.size(), greaterThan(0));
+
+    CommandInfo getInfo = infos.get("get");
+    assertEquals(2, getInfo.getArity());
+    assertEquals(2, getInfo.getFlags().size());
+    assertEquals(1, getInfo.getFirstKey());
+    assertEquals(1, getInfo.getLastKey());
+    assertEquals(1, getInfo.getStep());
+
+    assertNull(infos.get("foo")); // non-existing command
+
+    CommandInfo setInfo = infos.get("set");
+    assertEquals(3, setInfo.getAclCategories().size());
+    assertEquals(0, setInfo.getTips().size());
+    assertEquals(0, setInfo.getSubcommands().size());
+  }
+
   @Test
   public void commandInfo() {
     Map<String, CommandInfo> infos = jedis.commandInfo("GET", "foo", "SET");