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/* Self tests for gdb_environ for GDB, the GNU debugger.
Copyright (C) 2017 Free Software Foundation, Inc.
This file is part of GDB.
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/>. */
#include "defs.h"
#include "selftest.h"
#include "common/environ.h"
#include "common/diagnostics.h"
namespace selftests {
namespace gdb_environ_tests {
static void
run_tests ()
{
/* Set a test environment variable. This will be unset at the end
of this function. */
if (setenv ("GDB_SELFTEST_ENVIRON", "1", 1) != 0)
error (_("Could not set environment variable for testing."));
gdb_environ env;
/* When the vector is initialized, there should always be one NULL
element in it. */
SELF_CHECK (env.envp ()[0] == NULL);
/* Make sure that there is no other element. */
SELF_CHECK (env.get ("PWD") == NULL);
/* Check if unset followed by a set in an empty vector works. */
env.set ("PWD", "test");
SELF_CHECK (strcmp (env.get ("PWD"), "test") == 0);
/* The second element must be NULL. */
SELF_CHECK (env.envp ()[1] == NULL);
env.unset ("PWD");
SELF_CHECK (env.envp ()[0] == NULL);
/* Initialize the environment vector using the host's environ. */
env = gdb_environ::from_host_environ ();
/* Our test environment variable should be present at the
vector. */
SELF_CHECK (strcmp (env.get ("GDB_SELFTEST_ENVIRON"), "1") == 0);
/* Set our test variable to another value. */
env.set ("GDB_SELFTEST_ENVIRON", "test");
SELF_CHECK (strcmp (env.get ("GDB_SELFTEST_ENVIRON"), "test") == 0);
/* And unset our test variable. The variable still exists in the
host's environment, but doesn't exist in our vector. */
env.unset ("GDB_SELFTEST_ENVIRON");
SELF_CHECK (env.get ("GDB_SELFTEST_ENVIRON") == NULL);
/* Re-set the test variable. */
env.set ("GDB_SELFTEST_ENVIRON", "1");
SELF_CHECK (strcmp (env.get ("GDB_SELFTEST_ENVIRON"), "1") == 0);
/* When we clear our environ vector, there should be only one
element on it (NULL), and we shouldn't be able to get our test
variable. */
env.clear ();
SELF_CHECK (env.envp ()[0] == NULL);
SELF_CHECK (env.get ("GDB_SELFTEST_ENVIRON") == NULL);
/* Reinitialize our environ vector using the host environ. We
should be able to see one (and only one) instance of the test
variable. */
env = gdb_environ::from_host_environ ();
char **envp = env.envp ();
int num_found = 0;
for (size_t i = 0; envp[i] != NULL; ++i)
if (strcmp (envp[i], "GDB_SELFTEST_ENVIRON=1") == 0)
++num_found;
SELF_CHECK (num_found == 1);
/* Get rid of our test variable. */
unsetenv ("GDB_SELFTEST_ENVIRON");
/* Test the case when we set a variable A, then set a variable B,
then unset A, and make sure that we cannot find A in the environ
vector, but can still find B. */
env.set ("GDB_SELFTEST_ENVIRON_1", "aaa");
SELF_CHECK (strcmp (env.get ("GDB_SELFTEST_ENVIRON_1"), "aaa") == 0);
env.set ("GDB_SELFTEST_ENVIRON_2", "bbb");
SELF_CHECK (strcmp (env.get ("GDB_SELFTEST_ENVIRON_2"), "bbb") == 0);
env.unset ("GDB_SELFTEST_ENVIRON_1");
SELF_CHECK (env.get ("GDB_SELFTEST_ENVIRON_1") == NULL);
SELF_CHECK (strcmp (env.get ("GDB_SELFTEST_ENVIRON_2"), "bbb") == 0);
env.clear ();
/* Test that after a std::move the moved-from object is left at a
valid state (i.e., its only element is NULL). */
env.set ("A", "1");
SELF_CHECK (strcmp (env.get ("A"), "1") == 0);
gdb_environ env2;
env2 = std::move (env);
SELF_CHECK (env.envp ()[0] == NULL);
SELF_CHECK (strcmp (env2.get ("A"), "1") == 0);
SELF_CHECK (env2.envp ()[1] == NULL);
env.set ("B", "2");
SELF_CHECK (strcmp (env.get ("B"), "2") == 0);
SELF_CHECK (env.envp ()[1] == NULL);
/* Test that the move constructor leaves everything at a valid
state. */
env.clear ();
env.set ("A", "1");
SELF_CHECK (strcmp (env.get ("A"), "1") == 0);
gdb_environ env3 = std::move (env);
SELF_CHECK (env.envp ()[0] == NULL);
SELF_CHECK (strcmp (env3.get ("A"), "1") == 0);
SELF_CHECK (env3.envp ()[1] == NULL);
env.set ("B", "2");
SELF_CHECK (strcmp (env.get ("B"), "2") == 0);
SELF_CHECK (env.envp ()[1] == NULL);
/* Test self-move. */
env.clear ();
env.set ("A", "1");
SELF_CHECK (strcmp (env.get ("A"), "1") == 0);
/* Some compilers warn about moving to self, but that's precisely what we want
to test here, so turn this warning off. */
DIAGNOSTIC_PUSH
DIAGNOSTIC_IGNORE_SELF_MOVE
env = std::move (env);
DIAGNOSTIC_POP
SELF_CHECK (strcmp (env.get ("A"), "1") == 0);
SELF_CHECK (strcmp (env.envp ()[0], "A=1") == 0);
SELF_CHECK (env.envp ()[1] == NULL);
}
} /* namespace gdb_environ */
} /* namespace selftests */
void
_initialize_environ_selftests ()
{
selftests::register_test (selftests::gdb_environ_tests::run_tests);
}
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