[RFC PATCH 14/77] tests: metadata: Add a first test related to the dt_flags header field

A new field has been recently added to the dtb header: dt_flags.

Even if this field is not yet used to encode meaningful information,
add a basic test related to this field (presence and its 0 default
value).

Signed-off-by: Herve Codina <[email protected]>
---
 tests/metadata_dtflags0.dtb.expect |  1 +
 tests/metadata_dtflags0.dts        | 10 ++++++++++
 tests/run_tests.sh                 |  6 ++++++
 3 files changed, 17 insertions(+)
 create mode 100644 tests/metadata_dtflags0.dtb.expect
 create mode 100644 tests/metadata_dtflags0.dts

diff --git a/tests/metadata_dtflags0.dtb.expect b/tests/metadata_dtflags0.dtb.expect
new file mode 100644
index 0000000..cefed4d
--- /dev/null
+++ b/tests/metadata_dtflags0.dtb.expect
@@ -0,0 +1 @@
+// dt_flags:		0x0
diff --git a/tests/metadata_dtflags0.dts b/tests/metadata_dtflags0.dts
new file mode 100644
index 0000000..3ef867e
--- /dev/null
+++ b/tests/metadata_dtflags0.dts
@@ -0,0 +1,10 @@
+// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause)
+/*
+ * Copyright (C) 2026 Bootlin
+ */
+
+/dts-v1/;
+
+/ {
+	prop = <1>;
+};
diff --git a/tests/run_tests.sh b/tests/run_tests.sh
index 423812e..496fcb9 100755
--- a/tests/run_tests.sh
+++ b/tests/run_tests.sh
@@ -1141,6 +1141,12 @@ metadata_tests() {
 		sed -i '/^\/\/ /d' $dt.dtb.dts.dtb.out
 		base_run_test check_diff $dt.dtb.dts.dtb.out "$SRCDIR/$dt.dtb.expect"
 	done
+
+	run_dtc_test -I dts -O dtb -o metadata_dtflags0.dtb "$SRCDIR/metadata_dtflags0.dts"
+	base_run_test wrap_fdtdump metadata_dtflags0.dtb metadata_dtflags0.dtb.out
+	# Keep only lines containing 'dt_flags'
+	sed -i '/dt_flags/!d' metadata_dtflags0.dtb.out
+	base_run_test check_diff metadata_dtflags0.dtb.out "$SRCDIR/metadata_dtflags0.dtb.expect"
 }
 
 pylibfdt_tests () {
-- 
2.52.0