test: Add test for partitions

This is technically a library function, but we use MMCs for testing, so
it is easier to do it with DM. At the moment, the only block devices in
sandbox are MMCs (AFAIK) so we just test with those.
Signed-off-by: NSean Anderson <sean.anderson@seco.com>

test/dm/Makefile

@@ -61,6 +61,7 @@ obj-y += ofread.o
 obj-y += of_extra.o
 obj-$(CONFIG_OSD) += osd.o
 obj-$(CONFIG_DM_VIDEO) += panel.o
+obj-$(CONFIG_EFI_PARTITION) += part.o
 obj-$(CONFIG_DM_PCI) += pci.o
 obj-$(CONFIG_P2SB) += p2sb.o
 obj-$(CONFIG_PCI_ENDPOINT) += pci_ep.o

test/dm/part.c

+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2020 Sean Anderson <sean.anderson@seco.com>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <mmc.h>
+#include <part.h>
+#include <part_efi.h>
+#include <dm/test.h>
+#include <test/ut.h>
+
+static int dm_test_part(struct unit_test_state *uts)
+{
+	char str_disk_guid[UUID_STR_LEN + 1];
+	struct blk_desc *mmc_dev_desc;
+	struct disk_partition part_info;
+	struct disk_partition parts[2] = {
+		{
+			.start = 48, /* GPT data takes up the first 34 blocks or so */
+			.size = 1,
+			.name = "test1",
+		},
+		{
+			.start = 49,
+			.size = 1,
+			.name = "test2",
+		},
+	};
+
+	ut_asserteq(1, blk_get_device_by_str("mmc", "1", &mmc_dev_desc));
+	if (CONFIG_IS_ENABLED(RANDOM_UUID)) {
+		gen_rand_uuid_str(parts[0].uuid, UUID_STR_FORMAT_STD);
+		gen_rand_uuid_str(parts[1].uuid, UUID_STR_FORMAT_STD);
+		gen_rand_uuid_str(str_disk_guid, UUID_STR_FORMAT_STD);
+	}
+	ut_assertok(gpt_restore(mmc_dev_desc, str_disk_guid, parts,
+				ARRAY_SIZE(parts)));
+
+#define test(expected, part_str, whole) \
+	ut_asserteq(expected, \
+		    part_get_info_by_dev_and_name_or_num("mmc", part_str, \
+							 &mmc_dev_desc, \
+							 &part_info, whole))
+
+	test(-ENODEV, "", true);
+	env_set("bootdevice", "0");
+	test(0, "", true);
+	env_set("bootdevice", "1");
+	test(1, "", false);
+	test(1, "-", false);
+	env_set("bootdevice", "");
+	test(-EPROTONOSUPPORT, "0", false);
+	test(0, "0", true);
+	test(0, ":0", true);
+	test(0, ".0", true);
+	test(0, ".0:0", true);
+	test(-EINVAL, "#test1", true);
+	test(1, "1", false);
+	test(1, "1", true);
+	test(-ENOENT, "1:0", false);
+	test(0, "1:0", true);
+	test(1, "1:1", false);
+	test(2, "1:2", false);
+	test(1, "1.0", false);
+	test(0, "1.0:0", true);
+	test(1, "1.0:1", false);
+	test(2, "1.0:2", false);
+	test(-EINVAL, "1#bogus", false);
+	test(1, "1#test1", false);
+	test(2, "1#test2", false);
+
+	return 0;
+}
+DM_TEST(dm_test_part, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT);