[v2,5/5] mi/python: Add tests for python-defined MI commands

diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index d46422635b..935db3bc3b 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,8 @@ 
+2019-05-03  Jan Vrany  <jan.vrany@fit.cvut.cz>
+
+	* gdb.python/py-mi-cmd.exp: New file.
+	* gdb.python/py-mi-cmd.py: New file.
+
 2019-04-15  Leszek Swirski  <leszeks@google.com>
 
 	* gdb.arch/amd64-eval.cc: New file.
diff --git a/gdb/testsuite/gdb.python/py-mi-cmd.exp b/gdb/testsuite/gdb.python/py-mi-cmd.exp
new file mode 100644
index 0000000000..e6226c4c63
--- /dev/null
+++ b/gdb/testsuite/gdb.python/py-mi-cmd.exp
@@ -0,0 +1,109 @@ 
+# Copyright (C) 2018 Free Software Foundation, Inc.
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# Test custom MI commands implemented in Python.
+
+load_lib gdb-python.exp
+load_lib mi-support.exp
+set MIFLAGS "-i=mi2"
+
+gdb_exit
+if {[mi_gdb_start]} {
+    continue
+}
+
+if {[lsearch -exact [mi_get_features] python] < 0} {
+    unsupported "python support is disabled"
+    return -1
+}
+
+standard_testfile
+#
+# Start here
+#
+
+
+mi_gdb_test "set python print-stack full" \
+  ".*\\^done" \
+  "set python print-stack full"
+
+mi_gdb_test "source ${srcdir}/${subdir}/${testfile}.py" \
+  ".*\\^done" \
+  "load python file"
+
+mi_gdb_test "python pycmd1('-pycmd')" \
+  ".*\\^done" \
+  "Define -pycmd MI command"
+
+
+mi_gdb_test "-pycmd int" \
+  "\\^done,result=\"42\"" \
+  "-pycmd int"
+
+mi_gdb_test "-pycmd str" \
+  "\\^done,result=\"Hello world!\"" \
+  "-pycmd str"
+
+mi_gdb_test "-pycmd ary" \
+  "\\^done,result=\\\[\"Hello\",\"42\"\\\]" \
+  "-pycmd ary"
+
+mi_gdb_test "-pycmd dct" \
+  "\\^done,result={hello=\"world\",times=\"42\"}" \
+  "-pycmd dct"
+
+mi_gdb_test "-pycmd tpl" \
+  "\\^done,result=\\\[\"42\",\"Hello\"\\\]" \
+  "-pycmd tpl"
+
+mi_gdb_test "-pycmd itr" \
+  "\\^done,result=\\\[\"1\",\"2\",\"3\"\\\]" \
+  "-pycmd itr"
+
+mi_gdb_test "-pycmd nn1" \
+  "\\^done" \
+  "-pycmd nn1"
+
+mi_gdb_test "-pycmd nn2" \
+  "\\^done,result=\\\[\"None\"\\\]" \
+  "-pycmd nn2"
+
+mi_gdb_test "-pycmd bogus" \
+  "\\^error,msg=\"-pycmd: Invalid parameter: bogus\"" \
+  "-pycmd bogus"
+
+mi_gdb_test "-pycmd exp" \
+  "\\^error,msg=\"-pycmd: failed to execute command\"" \
+  "-pycmd exp"
+
+mi_gdb_test "python pycmd2('-pycmd')" \
+  ".*\\^done" \
+  "Redefine -pycmd MI command from CLI command"
+
+mi_gdb_test "-pycmd str" \
+  "\\^done,result=\"Ciao!\"" \
+  "-pycmd str"
+
+mi_gdb_test "-pycmd int" \
+  "\\^error,msg=\"-pycmd: Invalid parameter: int\"" \
+  "-pycmd int"
+
+mi_gdb_test "-pycmd red" \
+    "\\^error,msg=\"-pycmd: Command redefined but we failing anyway\"" \
+  "Redefine -pycmd MI command from Python MI command"
+
+mi_gdb_test "-pycmd int" \
+  "\\^done,result=\"42\"" \
+  "-pycmd int"
+
diff --git a/gdb/testsuite/gdb.python/py-mi-cmd.py b/gdb/testsuite/gdb.python/py-mi-cmd.py
new file mode 100644
index 0000000000..76ab46c97d
--- /dev/null
+++ b/gdb/testsuite/gdb.python/py-mi-cmd.py
@@ -0,0 +1,39 @@ 
+import gdb
+
+class pycmd1(gdb.MICommand):
+    def invoke(self, argv):
+        if argv[0] == 'int':
+            return 42
+        elif argv[0] == 'str':
+            return "Hello world!"
+        elif argv[0] == 'ary':
+            return [ 'Hello', 42 ]
+        elif argv[0] == "dct":
+            return { 'hello' : 'world', 'times' : 42}
+        elif argv[0] == 'tpl':
+            return ( 42 , 'Hello' )
+        elif argv[0] == 'itr':
+            return iter([1,2,3])
+        elif argv[0] == 'nn1':
+            return None
+        elif argv[0] == 'nn2':
+            return [ None ]
+        elif argv[0] == 'red':
+            pycmd2('-pycmd')
+            return None
+        elif argv[0] == 'exp':
+            raise gdb.GdbError()
+        else:
+            raise gdb.GdbError("Invalid parameter: %s" % argv[0])
+
+
+class pycmd2(gdb.MICommand):
+    def invoke(self, argv):
+        if argv[0] == 'str':
+            return "Ciao!"
+        elif argv[0] == 'red':
+            pycmd1('-pycmd')
+            raise gdb.GdbError("Command redefined but we failing anyway")
+        else:
+            raise gdb.GdbError("Invalid parameter: %s" % argv[0])
+