# Copyright 2022-2023 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 how GDB reformats the documentation string of commands
# implemented in Python for use as the help text of those same
# commands.

load_lib gdb-python.exp

# Check that Python is supported.
clean_restart
if { [skip_python_tests] } { continue }

# A global counter used to number the tests.
set idx 0

# Run a test, create both a command and a parameter with INPUT_DOCS as
# the Python documentation string, load the command and parameter into
# GDB, and then ask for the help text of the command, and the show and
# set help for the parameter.  The output from GDB should match
# EXPECTED_OUTPUT in each case.
#
# The INPUT_DOCS must start with 2 space characters, followed by the
# 3-quote characters to start the doc string, and must end with the
# final 3-quote characters.  If this is not true then an error is
# thrown, and this function immediately returns.
proc test { input_docs expected_output } {
    global idx

    set local_idx $idx
    incr idx

    with_test_prefix "test ${local_idx}" {

	# The tests in this script don't have descriptive names,
	# rather they use the global IDX to generate a unique name for
	# each test.  To make it easier to track down a failing test,
	# we print out the test name and the input string.
	verbose -log "Start of: test_cmd ${local_idx}"
	verbose -log "Input:\n${input_docs}"

	if { [string range $input_docs 0 4] != "  \"\"\"" } {
	    perror "Input string does not start with the required pattern"
	    return
	}

	if { [string range $input_docs end-2 end] != "\"\"\"" } {
	    perror "Input string does not end with the required pattern"
	    return
	}

	set python_filename [standard_output_file "${::gdb_test_file_name}-${local_idx}.py"]

	set fd [open $python_filename w]

	puts $fd "class test_cmd (gdb.Command):"
	puts $fd $input_docs
	puts $fd ""
	puts $fd "  def __init__ (self):"
	puts $fd "    super ().__init__ (\"test-cmd\", gdb.COMMAND_OBSCURE)"
	puts $fd ""
	puts $fd "  def invoke (self, arg, from_tty):"
	puts $fd "    print (\"In test-cmd\")"
	puts $fd ""

	puts $fd "class test_param (gdb.Parameter):"
	puts $fd $input_docs
	puts $fd ""
	puts $fd "  show_doc = \"This is the show doc line\""
	puts $fd "  set_doc = \"This is the set doc line\""
	puts $fd ""
	puts $fd "  def __init__ (self):"
	puts $fd "    super ().__init__ (\"test-param\", gdb.COMMAND_OBSCURE, gdb.PARAM_BOOLEAN)"
	puts $fd ""
	puts $fd "  def get_show_string (self, value):"
	puts $fd "    return \"The state is '\" + value + \"'\""

	puts $fd ""
	puts $fd "test_param ()"
	puts $fd "test_cmd ()"

	puts $fd ""
	puts $fd "print(\"Loaded OK.\")"

	close $fd

	set remote_python_file \
	    [gdb_remote_download host $python_filename]

	clean_restart

	gdb_test "source ${remote_python_file}" \
	    "Loaded OK\\." \
	    "source python command file"

	# Use gdb_test_multiple here as plain gdb_test will allow
	# excess blank lines between the expected_output pattern and
	# the gdb_prompt - a core part of this test is that we are
	# checking that such blank lines are removed - so we can't use
	# gdb_test here.
	gdb_test_multiple "help test-cmd" "" {
	    -re "^help test-cmd\r\n" {
		exp_continue
	    }
	    -re "^$expected_output\r\n$::gdb_prompt $" {
		pass $gdb_test_name
	    }
	}

	gdb_test_multiple "help set test-param" "" {
	    -re "^help set test-param\r\n" {
		exp_continue
	    }
	    -re "^This is the set doc line\r\n" {
		exp_continue
	    }
	    -re "^$expected_output\r\n$::gdb_prompt $" {
		pass $gdb_test_name
	    }
	}

	gdb_test_multiple "help show test-param" "" {
	    -re "^help show test-param\r\n" {
		exp_continue
	    }
	    -re "^This is the show doc line\r\n" {
		exp_continue
	    }
	    -re "^$expected_output\r\n$::gdb_prompt $" {
		pass $gdb_test_name
	    }
	}
    }
}

# The first test is pretty vanilla. First line starts immediately
# after the opening quotes, and closing quotes are immediately after
# the last line.
test \
    [multi_line_input \
	 "  \"\"\"This is the first line." \
	 "" \
	 "  This is the third line.\"\"\""] \
    [multi_line \
	 "This is the first line\\." \
	 "" \
	 "This is the third line\\."]

# In this test the first line starts on the line after the opening
# quotes.  The blank line in the middle is still completely empty.
test \
    [multi_line_input \
	 "  \"\"\"" \
	 "  This is the first line." \
	 "" \
	 "  This is the third line.\"\"\""] \
    [multi_line \
	 "This is the first line\\." \
	 "" \
	 "This is the third line\\."]

# This test adds an indented line in the middle, we expect the
# relative indentation to be retained.
test\
    [multi_line_input \
	 "  \"\"\"" \
	 "  This is the first line." \
	 "    Indented second line." \
	 "  This is the third line.\"\"\""] \
    [multi_line \
	 "This is the first line\\." \
	 "  Indented second line\\." \
	 "This is the third line\\."]

# The indentation moves to the first line.
test\
    [multi_line_input \
	 "  \"\"\"" \
	 "    Indented first line." \
	 "  This is the second line." \
	 "  This is the third line.\"\"\""] \
    [multi_line \
	 "  Indented first line\\." \
	 "This is the second line\\." \
	 "This is the third line\\."]

# The indentation moves to the last line.
test\
    [multi_line_input \
	 "  \"\"\"" \
	 "  This is the first line." \
	 "  This is the second line." \
	 "    Indented third line.\"\"\""] \
    [multi_line \
	 "This is the first line\\." \
	 "This is the second line\\." \
	 "  Indented third line\\."]

# Tests using different amounts of white-space on a line of its own.
# We test with the white-space at the beginning, end, and in the
# middle of the doc string.
foreach line [list "" " " "  " "   " "    "] {
    # Blank lines at the beginning should be removed.
    test \
	[multi_line_input \
	     "  \"\"\"" \
	     $line \
	     "  This is the first line." \
	     "    Indented second line." \
	     "  This is the third line.\"\"\""] \
	[multi_line \
	     "This is the first line\\." \
	     "  Indented second line\\." \
	     "This is the third line\\."]

    # As should blank lines at the end.
    test \
	[multi_line_input \
	     "  \"\"\"" \
	     "  This is the first line." \
	     "    Indented second line." \
	     "  This is the third line." \
	     $line \
	     "  \"\"\""] \
	[multi_line \
	     "This is the first line\\." \
	     "  Indented second line\\." \
	     "This is the third line\\."]

    # While blank lines in the middle should have all white-space
    # removed.
    test \
	[multi_line_input \
	     "  \"\"\"" \
	     "  This is the first line." \
	     $line \
	     "  This is the third line." \
	     $line \
	     "  \"\"\""] \
	[multi_line \
	     "This is the first line\\." \
	     "" \
	     "This is the third line\\."]
}

# Check for correct handling of closing quotes being on a line of
# their own.
test\
    [multi_line_input \
	 "  \"\"\"  " \
	 "  This is the first line." \
	 "    Indented second line." \
	 "  This is the third line." \
	 "  \"\"\""] \
    [multi_line \
	 "This is the first line\\." \
	 "  Indented second line\\." \
	 "This is the third line\\." ]


# Check with a single 'x' character before the closing quotes.  Make
# sure we don't drop this character.
test\
    [multi_line_input \
	 "  \"\"\"  " \
	 "  This is the first line." \
	 "    Indented second line." \
	 "  This is the third line." \
	 "  x\"\"\""] \
    [multi_line \
	 "This is the first line\\." \
	 "  Indented second line\\." \
	 "This is the third line\\." \
	 "x"]