277     ATF_REQUIRE( tree.is_set("var1"));  in ATF_TEST_CASE_BODY()
278     ATF_REQUIRE(!tree.is_set("var2"));  in ATF_TEST_CASE_BODY()
279     ATF_REQUIRE( tree.is_set("var3"));  in ATF_TEST_CASE_BODY()
295     ATF_REQUIRE(!tree.is_set("a"));  in ATF_TEST_CASE_BODY()
296     ATF_REQUIRE(!tree.is_set("a.b"));  in ATF_TEST_CASE_BODY()
297     ATF_REQUIRE( tree.is_set("a.b.var1"));  in ATF_TEST_CASE_BODY()
298     ATF_REQUIRE(!tree.is_set("a.b.var1.trailing"));  in ATF_TEST_CASE_BODY()
300     ATF_REQUIRE(!tree.is_set("a"));  in ATF_TEST_CASE_BODY()
301     ATF_REQUIRE(!tree.is_set("a.b"));  in ATF_TEST_CASE_BODY()
302     ATF_REQUIRE(!tree.is_set("a.b.var2"));  in ATF_TEST_CASE_BODY()
303     ATF_REQUIRE(!tree.is_set("a.b.var2.trailing"));  in ATF_TEST_CASE_BODY()
305     ATF_REQUIRE(!tree.is_set("e"));  in ATF_TEST_CASE_BODY()
306     ATF_REQUIRE( tree.is_set("e.var3"));  in ATF_TEST_CASE_BODY()
307     ATF_REQUIRE(!tree.is_set("e.var3.trailing"));  in ATF_TEST_CASE_BODY()
316     ATF_REQUIRE_THROW(config::invalid_key_error, tree.is_set(".abc"));  in ATF_TEST_CASE_BODY()