[RFC PATCH 28/77] tests: metadata: Add a test for export symbols sorting

dtc is able to sort the export symbols list when the --sort option is
used.

Add a test for this feature.

Signed-off-by: Herve Codina <[email protected]>
---
 tests/metadata_sort.dtb.dts.expect | 18 ++++++++++++++++++
 tests/metadata_sort.dtb.expect     | 15 +++++++++++++++
 tests/metadata_sort.dts            | 21 +++++++++++++++++++++
 tests/run_tests.sh                 |  8 ++++++++
 4 files changed, 62 insertions(+)
 create mode 100644 tests/metadata_sort.dtb.dts.expect
 create mode 100644 tests/metadata_sort.dtb.expect
 create mode 100644 tests/metadata_sort.dts

diff --git a/tests/metadata_sort.dtb.dts.expect b/tests/metadata_sort.dtb.dts.expect
new file mode 100644
index 0000000..f07a42b
--- /dev/null
+++ b/tests/metadata_sort.dtb.dts.expect
@@ -0,0 +1,18 @@
+/dts-v1/;
+/addon/;
+
+/ {
+
+	node-a {
+		prop_a = <0x1c8>;
+		prop_b = <0x7b>;
+
+		/export/ a: &{/node-b};
+		/export/ ba: &{/node-b};
+		/export/ bb: &{/node-b};
+	};
+
+	node-b {
+		phandle = <0x01>;
+	};
+};
diff --git a/tests/metadata_sort.dtb.expect b/tests/metadata_sort.dtb.expect
new file mode 100644
index 0000000..7856894
--- /dev/null
+++ b/tests/metadata_sort.dtb.expect
@@ -0,0 +1,15 @@
+/dts-v1/;
+/addon/;
+
+/ {
+    node-a {
+        prop_a = <0x000001c8>;
+        prop_b = <0x0000007b>;
+        // [FDT_EXPORT_SYM] 'a' -> phandle 0x00000001
+        // [FDT_EXPORT_SYM] 'ba' -> phandle 0x00000001
+        // [FDT_EXPORT_SYM] 'bb' -> phandle 0x00000001
+    };
+    node-b {
+        phandle = <0x00000001>;
+    };
+};
diff --git a/tests/metadata_sort.dts b/tests/metadata_sort.dts
new file mode 100644
index 0000000..7d1cca7
--- /dev/null
+++ b/tests/metadata_sort.dts
@@ -0,0 +1,21 @@
+// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause)
+/*
+ * Copyright (C) 2026 Bootlin
+ */
+
+/dts-v1/;
+/addon/;
+
+/ {
+	node_b: node-b {
+	};
+
+	node-a {
+		prop_b = <123>;
+		prop_a = <456>;
+
+		/export/ ba: &node_b;
+		/export/ bb: &node_b;
+		/export/ a: &node_b;
+	};
+};
diff --git a/tests/run_tests.sh b/tests/run_tests.sh
index ed3a240..fc270e2 100755
--- a/tests/run_tests.sh
+++ b/tests/run_tests.sh
@@ -1154,6 +1154,14 @@ metadata_tests() {
 	# Keep only lines containing 'dt_flags'
 	sed -i '/dt_flags/!d' metadata_dtflags1.dtb.out
 	base_run_test check_diff metadata_dtflags1.dtb.out "$SRCDIR/metadata_dtflags1.dtb.expect"
+
+	run_dtc_test -I dts -O dtb -s -o metadata_sort.dtb "$SRCDIR/metadata_sort.dts"
+	base_run_test wrap_fdtdump metadata_sort.dtb metadata_sort.dtb.out
+	# Remove unneeded comments
+	sed -i '/^\/\/ /d' metadata_sort.dtb.out
+	base_run_test check_diff metadata_sort.dtb.out "$SRCDIR/metadata_sort.dtb.expect"
+	run_dtc_test -I dtb -O dts -o metadata_sort.dtb.dts metadata_sort.dtb
+	base_run_test check_diff metadata_sort.dtb.dts "$SRCDIR/metadata_sort.dtb.dts.expect"
 }
 
 pylibfdt_tests () {
-- 
2.52.0