Index: lib/libnv/tests/dnv_tests.cc
===================================================================
--- lib/libnv/tests/dnv_tests.cc
+++ lib/libnv/tests/dnv_tests.cc
@@ -271,6 +271,278 @@
 	nvlist_destroy(nvl);
 }
 
+ATF_TEST_CASE_WITHOUT_HEAD(dnvlist_take_bool__present);
+ATF_TEST_CASE_BODY(dnvlist_take_bool__present)
+{
+	nvlist_t *nvl;
+	const char *key;
+	bool value;
+
+	nvl = nvlist_create(0);
+
+	key = "name";
+	value = true;
+	nvlist_add_bool(nvl, key, value);
+
+	ATF_REQUIRE_EQ(dnvlist_take_bool(nvl, key, false), value);
+	ATF_REQUIRE(nvlist_empty(nvl));
+
+	nvlist_destroy(nvl);
+}
+
+ATF_TEST_CASE_WITHOUT_HEAD(dnvlist_take_bool__empty);
+ATF_TEST_CASE_BODY(dnvlist_take_bool__empty)
+{
+	nvlist_t *nvl;
+
+	nvl = nvlist_create(0);
+
+	ATF_REQUIRE_EQ(dnvlist_take_bool(nvl, "123", false), false);
+
+	nvlist_destroy(nvl);
+}
+
+ATF_TEST_CASE_WITHOUT_HEAD(dnvlist_take_bool__default_value);
+ATF_TEST_CASE_BODY(dnvlist_take_bool__default_value)
+{
+	nvlist_t *nvl;
+
+	nvl = nvlist_create(0);
+	nvlist_add_bool(nvl, "key", true);
+
+	ATF_REQUIRE_EQ(dnvlist_take_bool(nvl, "otherkey", true), true);
+
+	nvlist_destroy(nvl);
+}
+
+ATF_TEST_CASE_WITHOUT_HEAD(dnvlist_take_number__present);
+ATF_TEST_CASE_BODY(dnvlist_take_number__present)
+{
+	nvlist_t *nvl;
+	const char *key;
+	uint64_t value;
+
+	nvl = nvlist_create(0);
+
+	key = "name";
+	value = 194154;
+	nvlist_add_number(nvl, key, value);
+
+	ATF_REQUIRE_EQ(dnvlist_take_number(nvl, key, 2), value);
+	ATF_REQUIRE(nvlist_empty(nvl));
+
+	nvlist_destroy(nvl);
+}
+
+ATF_TEST_CASE_WITHOUT_HEAD(dnvlist_take_number__empty);
+ATF_TEST_CASE_BODY(dnvlist_take_number__empty)
+{
+	nvlist_t *nvl;
+
+	nvl = nvlist_create(0);
+
+	ATF_REQUIRE_EQ(dnvlist_take_number(nvl, "123", 126484), 126484);
+
+	nvlist_destroy(nvl);
+}
+
+ATF_TEST_CASE_WITHOUT_HEAD(dnvlist_take_number__default_value);
+ATF_TEST_CASE_BODY(dnvlist_take_number__default_value)
+{
+	nvlist_t *nvl;
+
+	nvl = nvlist_create(0);
+	nvlist_add_number(nvl, "key", 12);
+
+	ATF_REQUIRE_EQ(dnvlist_take_number(nvl, "otherkey", 13), 13);
+
+	nvlist_destroy(nvl);
+}
+
+ATF_TEST_CASE_WITHOUT_HEAD(dnvlist_take_string__present);
+ATF_TEST_CASE_BODY(dnvlist_take_string__present)
+{
+	nvlist_t *nvl;
+	const char *key;
+	const char *value;
+	char *default_val, *actual_val;
+
+	nvl = nvlist_create(0);
+
+	key = "name";
+	value = "wrowm";
+	default_val = strdup("default");
+	nvlist_add_string(nvl, key, value);
+
+	actual_val = dnvlist_take_string(nvl, key, default_val);
+	ATF_REQUIRE_EQ(strcmp(actual_val, value), 0);
+	ATF_REQUIRE(nvlist_empty(nvl));
+
+	free(actual_val);
+	free(default_val);
+	nvlist_destroy(nvl);
+}
+
+ATF_TEST_CASE_WITHOUT_HEAD(dnvlist_take_string__empty);
+ATF_TEST_CASE_BODY(dnvlist_take_string__empty)
+{
+	nvlist_t *nvl;
+	char *default_val, *actual_val;
+
+	nvl = nvlist_create(0);
+	default_val = strdup("");
+
+	actual_val = dnvlist_take_string(nvl, "123", default_val);
+	ATF_REQUIRE_EQ(strcmp(actual_val, default_val), 0);
+
+	free(actual_val);
+	nvlist_destroy(nvl);
+}
+
+ATF_TEST_CASE_WITHOUT_HEAD(dnvlist_take_string__default_value);
+ATF_TEST_CASE_BODY(dnvlist_take_string__default_value)
+{
+	nvlist_t *nvl;
+	char *default_val, *actual_val;
+
+	nvl = nvlist_create(0);
+	nvlist_add_string(nvl, "key", "foobar");
+	default_val = strdup("other");
+
+	actual_val = dnvlist_take_string(nvl, "otherkey", default_val);
+	ATF_REQUIRE_EQ(strcmp(actual_val, default_val), 0);
+
+	free(actual_val);
+	nvlist_destroy(nvl);
+}
+
+ATF_TEST_CASE_WITHOUT_HEAD(dnvlist_take_nvlist__present);
+ATF_TEST_CASE_BODY(dnvlist_take_nvlist__present)
+{
+	nvlist_t *nvl;
+	const char *key;
+	nvlist_t *value, *default_val, *actual_val;
+
+	nvl = nvlist_create(0);
+
+	key = "name";
+	value = nvlist_create(0);
+	default_val = nvlist_create(0);
+	nvlist_move_nvlist(nvl, key, value);
+
+	actual_val = dnvlist_take_nvlist(nvl, key, default_val);
+	ATF_REQUIRE_EQ(actual_val, value);
+	ATF_REQUIRE(nvlist_empty(nvl));
+
+	free(actual_val);
+	free(default_val);
+	nvlist_destroy(nvl);
+}
+
+ATF_TEST_CASE_WITHOUT_HEAD(dnvlist_take_nvlist__empty);
+ATF_TEST_CASE_BODY(dnvlist_take_nvlist__empty)
+{
+	nvlist_t *nvl, *actual_val;
+
+	nvl = nvlist_create(0);
+
+	actual_val = dnvlist_take_nvlist(nvl, "123", NULL);
+	ATF_REQUIRE_EQ(actual_val, NULL);
+
+	free(actual_val);
+	nvlist_destroy(nvl);
+}
+
+ATF_TEST_CASE_WITHOUT_HEAD(dnvlist_take_nvlist__default_value);
+ATF_TEST_CASE_BODY(dnvlist_take_nvlist__default_value)
+{
+	nvlist_t *nvl;
+	nvlist_t *default_val, *actual_val;
+
+	nvl = nvlist_create(0);
+	nvlist_move_nvlist(nvl, "key", nvlist_create(0));
+	default_val = nvlist_create(0);
+
+	actual_val = dnvlist_take_nvlist(nvl, "otherkey", default_val);
+	ATF_REQUIRE_EQ(actual_val, default_val);
+
+	free(actual_val);
+	nvlist_destroy(nvl);
+}
+
+static void
+set_binary_value(void *&value, size_t &size, const char *str)
+{
+
+	value = strdup(str);
+	size = strlen(str) + 1; /* +1 to include '\0' */
+}
+
+ATF_TEST_CASE_WITHOUT_HEAD(dnvlist_take_binary__present);
+ATF_TEST_CASE_BODY(dnvlist_take_binary__present)
+{
+	nvlist_t *nvl;
+	const char *key;
+	void *value, *default_val, *actual_val;
+	size_t value_size, default_size, actual_size;
+
+	nvl = nvlist_create(0);
+
+	key = "name";
+	set_binary_value(value, value_size, "fkdojvmo908");
+	set_binary_value(default_val, default_size, "16546");
+	nvlist_add_binary(nvl, key, value, value_size);
+
+	actual_val = dnvlist_take_binary(nvl, key, &actual_size, default_val,
+	    default_size);
+	ATF_REQUIRE_EQ(value_size, actual_size);
+	ATF_REQUIRE_EQ(memcmp(actual_val, value, value_size), 0);
+	ATF_REQUIRE(nvlist_empty(nvl));
+
+	free(actual_val);
+	free(default_val);
+	nvlist_destroy(nvl);
+}
+
+ATF_TEST_CASE_WITHOUT_HEAD(dnvlist_take_binary__empty);
+ATF_TEST_CASE_BODY(dnvlist_take_binary__empty)
+{
+	nvlist_t *nvl;
+	void *default_val, *actual_val;
+	size_t default_size, actual_size;
+
+	nvl = nvlist_create(0);
+	set_binary_value(default_val, default_size, "\xa8\x89\x49\xff\xe2\x08");
+
+	actual_val = dnvlist_take_binary(nvl, "123", &actual_size, default_val,
+	    default_size);
+	ATF_REQUIRE_EQ(default_size, actual_size);
+	ATF_REQUIRE_EQ(memcmp(actual_val, default_val, actual_size), 0);
+
+	free(actual_val);
+	nvlist_destroy(nvl);
+}
+
+ATF_TEST_CASE_WITHOUT_HEAD(dnvlist_take_binary__default_value);
+ATF_TEST_CASE_BODY(dnvlist_take_binary__default_value)
+{
+	nvlist_t *nvl;
+	void *default_val, *actual_val;
+	size_t default_size, actual_size;
+
+	nvl = nvlist_create(0);
+	nvlist_add_binary(nvl, "key", "foobar", 6);
+	set_binary_value(default_val, default_size, "vbhag");
+
+	actual_val = dnvlist_take_binary(nvl, "otherkey", &actual_size,
+	    default_val, default_size);
+	ATF_REQUIRE_EQ(default_size, actual_size);
+	ATF_REQUIRE_EQ(memcmp(actual_val, default_val, default_size), 0);
+
+	free(actual_val);
+	nvlist_destroy(nvl);
+}
+
 ATF_INIT_TEST_CASES(tp)
 {
 	ATF_ADD_TEST_CASE(tp, dnvlist_get_bool__present);
@@ -283,4 +555,20 @@
 	ATF_ADD_TEST_CASE(tp, dnvlist_get_nvlist__default_value);
 	ATF_ADD_TEST_CASE(tp, dnvlist_get_binary__present);
 	ATF_ADD_TEST_CASE(tp, dnvlist_get_binary__default_value);
+
+	ATF_ADD_TEST_CASE(tp, dnvlist_take_bool__present);
+	ATF_ADD_TEST_CASE(tp, dnvlist_take_bool__empty);
+	ATF_ADD_TEST_CASE(tp, dnvlist_take_bool__default_value);
+	ATF_ADD_TEST_CASE(tp, dnvlist_take_number__present);
+	ATF_ADD_TEST_CASE(tp, dnvlist_take_number__empty);
+	ATF_ADD_TEST_CASE(tp, dnvlist_take_number__default_value);
+	ATF_ADD_TEST_CASE(tp, dnvlist_take_string__present);
+	ATF_ADD_TEST_CASE(tp, dnvlist_take_string__empty);
+	ATF_ADD_TEST_CASE(tp, dnvlist_take_string__default_value);
+	ATF_ADD_TEST_CASE(tp, dnvlist_take_nvlist__present);
+	ATF_ADD_TEST_CASE(tp, dnvlist_take_nvlist__empty);
+	ATF_ADD_TEST_CASE(tp, dnvlist_take_nvlist__default_value);
+	ATF_ADD_TEST_CASE(tp, dnvlist_take_binary__present);
+	ATF_ADD_TEST_CASE(tp, dnvlist_take_binary__empty);
+	ATF_ADD_TEST_CASE(tp, dnvlist_take_binary__default_value);
 }