45     ATF_REQUIRE(tools::env::has("PATH"));  in ATF_TEST_CASE_BODY()
46     ATF_REQUIRE(!tools::env::get("PATH").empty());  in ATF_TEST_CASE_BODY()
48     ATF_REQUIRE(!tools::env::has("_UNDEFINED_VARIABLE_"));  in ATF_TEST_CASE_BODY()
58     ATF_REQUIRE(tools::env::has("PATH"));  in ATF_TEST_CASE_BODY()
59     const std::string& oldval = tools::env::get("PATH");  in ATF_TEST_CASE_BODY()
60     tools::env::set("PATH", "foo-bar");  in ATF_TEST_CASE_BODY()
61     ATF_REQUIRE(tools::env::get("PATH") != oldval);  in ATF_TEST_CASE_BODY()
62     ATF_REQUIRE_EQ(tools::env::get("PATH"), "foo-bar");  in ATF_TEST_CASE_BODY()
64     ATF_REQUIRE(!tools::env::has("_UNDEFINED_VARIABLE_"));  in ATF_TEST_CASE_BODY()
65     tools::env::set("_UNDEFINED_VARIABLE_", "foo2-bar2");  in ATF_TEST_CASE_BODY()
66     ATF_REQUIRE_EQ(tools::env::get("_UNDEFINED_VARIABLE_"), "foo2-bar2");  in ATF_TEST_CASE_BODY()
76     ATF_REQUIRE(tools::env::has("PATH"));  in ATF_TEST_CASE_BODY()
77     tools::env::unset("PATH");  in ATF_TEST_CASE_BODY()
78     ATF_REQUIRE(!tools::env::has("PATH"));  in ATF_TEST_CASE_BODY()