Add tests related to export symbols using external references
(FDT_EXPORT_SYM_REF dtb tag).

Signed-off-by: Herve Codina <herve.codina@bootlin.com>
---
 tests/metadata_exportsyms_ref.dtb.dts.expect | 25 +++++++++++++++++++
 tests/metadata_exportsyms_ref.dtb.expect     | 18 ++++++++++++++
 tests/metadata_exportsyms_ref.dts            | 26 ++++++++++++++++++++
 tests/metadata_exportsyms_ref.dts.dts.expect | 25 +++++++++++++++++++
 tests/run_tests.sh                           |  3 ++-
 5 files changed, 96 insertions(+), 1 deletion(-)
 create mode 100644 tests/metadata_exportsyms_ref.dtb.dts.expect
 create mode 100644 tests/metadata_exportsyms_ref.dtb.expect
 create mode 100644 tests/metadata_exportsyms_ref.dts
 create mode 100644 tests/metadata_exportsyms_ref.dts.dts.expect

diff --git a/tests/metadata_exportsyms_ref.dtb.dts.expect b/tests/metadata_exportsyms_ref.dtb.dts.expect
new file mode 100644
index 0000000..d2c3320
--- /dev/null
+++ b/tests/metadata_exportsyms_ref.dtb.dts.expect
@@ -0,0 +1,25 @@
+/dts-v1/;
+/addon/;
+
+/ {
+
+	node-a {
+	};
+
+	node-b {
+	};
+
+	node-c {
+
+		sub-node {
+
+			/export/ ref_base_node_a: &base_node_a;
+			/export/ ref_base_node_b: &base_node_b;
+		};
+	};
+
+	node-d {
+
+		/export/ ref_base_node_c: &base_node_c;
+	};
+};
diff --git a/tests/metadata_exportsyms_ref.dtb.expect b/tests/metadata_exportsyms_ref.dtb.expect
new file mode 100644
index 0000000..395861b
--- /dev/null
+++ b/tests/metadata_exportsyms_ref.dtb.expect
@@ -0,0 +1,18 @@
+/dts-v1/;
+/addon/;
+
+/ {
+    node-a {
+    };
+    node-b {
+    };
+    node-c {
+        sub-node {
+            // [FDT_EXPORT_SYM_REF] 'ref_base_node_a' -> 'base_node_a'
+            // [FDT_EXPORT_SYM_REF] 'ref_base_node_b' -> 'base_node_b'
+        };
+    };
+    node-d {
+        // [FDT_EXPORT_SYM_REF] 'ref_base_node_c' -> 'base_node_c'
+    };
+};
diff --git a/tests/metadata_exportsyms_ref.dts b/tests/metadata_exportsyms_ref.dts
new file mode 100644
index 0000000..c094be1
--- /dev/null
+++ b/tests/metadata_exportsyms_ref.dts
@@ -0,0 +1,26 @@
+// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause)
+/*
+ * Copyright (C) 2026 Bootlin
+ */
+
+/dts-v1/;
+/addon/;
+
+/ {
+	node-a {
+	};
+
+	node-b {
+	};
+
+	node-c {
+		sub_node: sub-node {
+			/export/ ref_base_node_a: &base_node_a;
+			/export/ ref_base_node_b: &base_node_b;
+		};
+	};
+
+	node-d {
+		/export/ ref_base_node_c: &base_node_c;
+	};
+};
diff --git a/tests/metadata_exportsyms_ref.dts.dts.expect b/tests/metadata_exportsyms_ref.dts.dts.expect
new file mode 100644
index 0000000..2654df1
--- /dev/null
+++ b/tests/metadata_exportsyms_ref.dts.dts.expect
@@ -0,0 +1,25 @@
+/dts-v1/;
+/addon/;
+
+/ {
+
+	node-a {
+	};
+
+	node-b {
+	};
+
+	node-c {
+
+		sub_node: sub-node {
+
+			/export/ ref_base_node_a: &base_node_a;
+			/export/ ref_base_node_b: &base_node_b;
+		};
+	};
+
+	node-d {
+
+		/export/ ref_base_node_c: &base_node_c;
+	};
+};
diff --git a/tests/run_tests.sh b/tests/run_tests.sh
index fc270e2..1973525 100755
--- a/tests/run_tests.sh
+++ b/tests/run_tests.sh
@@ -1126,7 +1126,8 @@ wrap_fdtdump () {
 
 metadata_tests() {
 	for dt in metadata_reflocal metadata_refphandle \
-		  metadata_addon_base metadata_exportsyms_local; do
+		  metadata_addon_base metadata_exportsyms_local \
+		  metadata_exportsyms_ref; do
 		run_dtc_test -I dts -O dts -o $dt.dts.dts "$SRCDIR/$dt.dts"
 		base_run_test check_diff $dt.dts.dts "$SRCDIR/$dt.dts.dts.expect"
 		run_dtc_test -I dts -O dtb -o $dt.dtb "$SRCDIR/$dt.dts"
-- 
2.52.0