test: ofnode: test ofnode_device_is_compatible()

Test ofnode_device_is_compatible(), and also ofnode_path().

Requested-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

test/dm/Makefile

@@ -21,6 +21,7 @@ obj-$(CONFIG_DM_I2C) += i2c.o
 obj-$(CONFIG_LED) += led.o
 obj-$(CONFIG_DM_MAILBOX) += mailbox.o
 obj-$(CONFIG_DM_MMC) += mmc.o
+obj-y += ofnode.o
 obj-$(CONFIG_DM_PCI) += pci.o
 obj-$(CONFIG_PHY) += phy.o
 obj-$(CONFIG_POWER_DOMAIN) += power-domain.o

test/dm/ofnode.c

@@ -0,0 +1,17 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+#include <common.h>
+#include <dm.h>
+#include <dm/test.h>
+#include <test/ut.h>
+
+static int dm_test_ofnode_compatible(struct unit_test_state *uts)
+{
+	ofnode root_node = ofnode_path("/");
+
+	ut_assert(ofnode_valid(root_node));
+	ut_assert(ofnode_device_is_compatible(root_node, "sandbox"));
+
+	return 0;
+}
+DM_TEST(dm_test_ofnode_compatible, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);