# This testcase is part of GDB, the GNU debugger.

# Copyright 2019-2020 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 the "with" command.

load_lib completion-support.exp

standard_testfile .c

if {[build_executable "failed to prepare" $testfile $srcfile debug]} {
    return -1
}

clean_restart $binfile

# Test "maint with".  VALUES is a list of values.  A nested "with" is
# performed with each combination of pair of values from this list.
# This exercises setting a value, and restoring it too.  This is
# particularly important for the "special" values like "unlimited",
# which for example for var_uinteger maps to 0 at the user-visible
# level, but maps to -1 internally.

proc test_with {setting values} {
    foreach val1 $values {
	foreach val2 $values {
	    gdb_test \
		"maint with test-settings $setting $val1 -- maint with test-settings $setting $val2 -- p 1" \
		" = 1"
	}
    }
}

# Test "maint with" in the error case.  SETTING is the "maint set
# test-setting" setting to exercise.  TMP_VAL is the value to set the
# setting to.  EXPECTED_RE is the expected GDB output, which should be
# an error of some kind.  Also checks that the setting's original
# value is preserved across the error.

proc test_with_error {setting tmp_val expected_re} {
    global gdb_prompt

    with_test_prefix "$setting, $tmp_val" {
	set test "save org value"
	set org_val ""
	gdb_test_multiple "maint show test-settings $setting" $test {
	    -re "(.*)\r\n$gdb_prompt $" {
		set org_val $expect_out(1,string)
		pass $test
	    }
	}

	gdb_test \
	    "maint with test-settings $setting $tmp_val -- p 1" \
	    $expected_re

	gdb_test "maint show test-settings $setting" "^$org_val" \
	    "value hasn't changed across error"
    }
}

# Test "with" framework basics, using the internal "maint with
# test-settings" subcommands.
with_test_prefix "maint" {
    test_with "auto-boolean" {"on" "off" "auto"}
    test_with "boolean" {"" "on" "off" "0" "1" "enable" "disable"}
    test_with "integer" {"0" "1" "-1" "unlimited"}
    test_with "uinteger" {"0" "1" "unlimited"}
    test_with "zinteger" {"0" "1" "-1"}
    test_with "zuinteger" {"0" "1"}
    test_with "zuinteger-unlimited" {"-1" "unlimited" "0" "1"}
    test_with "string" {"" "foo" "\"hello world\""}
    test_with "string-noescape" {"" "foo" "\"hello world\""}
    test_with "filename" {"/foo" "bar/x/y"}
    test_with "optional-filename" {"" "/foo" "bar/x/y"}
    test_with "enum" {"xxx" "yyy"}

    # Check the most important error conditions.  E.g., empty,
    # negative or "unlimited" values for settings that don't accept
    # those.  Exhaustive error coverage of the set/with value parsing
    # is left to "set" testing, in gdb.base/settings.exp.
    test_with_error "auto-boolean" "" \
	"\"on\", \"off\" or \"auto\" expected\\."
    test_with_error "auto-boolean" "xxx" \
	"\"on\", \"off\" or \"auto\" expected\\."
    test_with_error "boolean" "2" "\"on\" or \"off\" expected\\."
    test_with_error "uinteger" "-1" "integer -1 out of range"
    test_with_error "uinteger" "" \
	"Argument required \\(integer to set it to, or \"unlimited\"\\.\\)\\."
    test_with_error "zuinteger" "-1" "integer -1 out of range"
    test_with_error "zuinteger" "" \
	"Argument required \\(integer to set it to\\.\\)\\."
    test_with_error "zuinteger-unlimited" "-2" \
	"only -1 is allowed to set as unlimited"
    test_with_error "zuinteger-unlimited" "" \
	"Argument required \\(integer to set it to, or \"unlimited\"\\.\\)\\."
    test_with_error "filename" "" \
	"Argument required \\(filename to set it to\\.\\)\\."
    test_with_error "enum" "" \
	"Requires an argument\\. Valid arguments are xxx, yyy, zzz\\."
}

# Basic/core tests using user-visible commands.
with_test_prefix "basics" {
    gdb_test "print g_s" " = {a = 1, b = 2, c = 3}"
    gdb_test "with print pretty -- print g_s" \
	[multi_line  \
	     " = {" \
	     "  a = 1," \
	     "  b = 2," \
	     "  c = 3" \
	     "}"]

    # A boolean setting.
    gdb_test "with non-stop on -- show non-stop" \
	"Controlling the inferior in non-stop mode is on\\."
    gdb_test "show non-stop" \
	"Controlling the inferior in non-stop mode is off\\."

    # Language.
    gdb_test "with language pascal -- show language" \
	"The current source language is \"pascal\"\\."

    gdb_test "show language" \
	"The current source language is \"auto; currently c\"\\."

    gdb_test "with language ada -- print g_s" \
	" = \\(a => 1, b => 2, c => 3\\)"

    # Nested "with"s.
    gdb_test "with language ada -- with language c -- print g_s" \
	" = {a = 1, b = 2, c = 3}"

    # "w" alias.
    gdb_test "w language pascal -- show language" \
	"The current source language is \"pascal\"\\." \
	"w alias works"

    # An early prototype of the "with" command got this wrong.
    gdb_test \
	"w print repeats unlimited -- w print repeats 1 -- p \"1223334444\"" \
	" = \"1\", '2' <repeats 2 times>, '3' <repeats 3 times>, '4' <repeats 4 times>"
}

# Check a user-defined command.
with_test_prefix "user-defined" {
    # A user defined command.
    set test "define usercmd"
    gdb_test_multiple "define usercmd" $test {
	-re "End with"  {
	    gdb_test \
		[multi_line_input \
		     {print g_s} \
		     {end}] \
		"" \
		$test
	}
    }
    gdb_test "with language ada -- usercmd" \
	" = \\(a => 1, b => 2, c => 3\\)"
}

# Check repeating.
with_test_prefix "repeat" {
    clean_restart $binfile

    # "with" with no command reinvokes the previous command.
    gdb_test "with language ada" \
	"No previous command to relaunch" \
	"reinvoke with no previous command to relaunch"

    gdb_test "print g_s" " = {a = 1, b = 2, c = 3}"

    gdb_test "with language ada" \
	" = \\(a => 1, b => 2, c => 3\\)" \
	"reinvoke with language"

    # Same, but with "--".
    gdb_test "with language fortran --" \
	" = \\( a = 1, b = 2, c = 3 \\)" \
	"reinvoke with language and --"

    # Repeating repeats the original "print g_s", not the last "with"
    # command.
    set test "repeat command line"
    send_gdb "\n"
    gdb_test_multiple "" $test {
	-re " = {a = 1, b = 2, c = 3}\r\n$gdb_prompt $" {
	    pass $test
	}
    }
}

# Basic run control.
with_test_prefix "run control" {
    clean_restart $binfile

    if ![runto_main] {
	fail "cannot run to main"
	return
    }

    # Check "with" with a synchronous execution command.
    gdb_test "with disassemble-next-line on -- next" \
	"return 0;.*=>.*"
}

# Check errors.
with_test_prefix "errors" {
    gdb_test "with" "Missing arguments\\."

    # Try both an unknown root setting and an unknown prefixed
    # setting.  The errors come from different locations in the
    # sources.
    gdb_test "with xxxx yyyy" \
	"Undefined set command: \"xxxx\".  Try \"help set\"\\."
    gdb_test "with print xxxx yyyy" \
	"Undefined set print command: \"xxxx yyyy\".  Try \"help set print\"\\."
    # Try one error case for "maint with", to make sure the right
    # "maintenance with" prefix is shown.
    gdb_test "maint with xxxx yyyy" \
	"Undefined maintenance set command: \"xxxx\".  Try \"help maintenance set\"\\."

    # Try ambiguous settings.
    gdb_test "with w" \
	"Ambiguous set command \"w\": watchdog, width, write\\."
    gdb_test "with print m" \
	"Ambiguous set print command \"m\": max-depth, max-symbolic-offset\\."

    gdb_test "with variable xxx=1" \
	"Cannot use this setting with the \"with\" command"

    gdb_test "with print elements -- p 1" \
	"Argument required \\(integer to set it to, or \"unlimited\"\\.\\)\\."

    gdb_test "with -- p 1" \
	"Missing setting before '--' delimiter"

    # Check that the setting is restored even if the command throws.
    gdb_test "with print elements 1 -- unknowncommand" \
	"Undefined command: \"unknowncommand\"\\.  Try \"help\"\\."
    gdb_test "show print elements" \
	"Limit on string chars or array elements to print is 200\\."
}

# Check completion.
with_test_prefix "completion" {
    test_gdb_complete_unique \
	"with pri" \
	"with print"

    test_gdb_complete_unique \
	"with print ele" \
	"with print elements"

    test_gdb_complete_unique \
	"with print elements u" \
	"with print elements unlimited"

    test_gdb_complete_none \
	"with print elements unlimited "

    test_gdb_completion_offers_commands "with print elements unlimited -- "

    # Check that the completer nests into the nested command line's
    # completer.
    test_gdb_complete_unique \
	"with print elements unlimited -- with print ele" \
	"with print elements unlimited -- with print elements"

    # Check completion of "maint with".  "maint with" and "with"'s
    # completers share 99% of the code.  All we need to care about
    # here is that the completion word point is computed correctly, so
    # any simple completion is sufficient.
    test_gdb_complete_unique \
	"maint with test-set" \
	"maint with test-settings"
}