Add tests related to external phandle references (FDT_REF_PHANDLE dtb
tag).

Signed-off-by: Herve Codina <herve.codina@bootlin.com>
---
 tests/metadata_refphandle.dtb.dts.expect | 17 +++++++++++++++++
 tests/metadata_refphandle.dtb.expect     | 16 ++++++++++++++++
 tests/metadata_refphandle.dts            | 11 +++++++++++
 tests/metadata_refphandle.dts.dts.expect | 17 +++++++++++++++++
 tests/run_tests.sh                       |  2 +-
 5 files changed, 62 insertions(+), 1 deletion(-)
 create mode 100644 tests/metadata_refphandle.dtb.dts.expect
 create mode 100644 tests/metadata_refphandle.dtb.expect
 create mode 100644 tests/metadata_refphandle.dts
 create mode 100644 tests/metadata_refphandle.dts.dts.expect

diff --git a/tests/metadata_refphandle.dtb.dts.expect b/tests/metadata_refphandle.dtb.dts.expect
new file mode 100644
index 0000000..c229ec1
--- /dev/null
+++ b/tests/metadata_refphandle.dtb.dts.expect
@@ -0,0 +1,17 @@
+/dts-v1/;
+
+/ {
+
+	fragment@0 {
+		target = <&test>;
+
+		__overlay__ {
+			ref = <&node_a>;
+		};
+	};
+
+	__fixups__ {
+		test = "/fragment@0:target:0";
+		node_a = "/fragment@0/__overlay__:ref:0";
+	};
+};
diff --git a/tests/metadata_refphandle.dtb.expect b/tests/metadata_refphandle.dtb.expect
new file mode 100644
index 0000000..b2f5f95
--- /dev/null
+++ b/tests/metadata_refphandle.dtb.expect
@@ -0,0 +1,16 @@
+/dts-v1/;
+
+/ {
+    fragment@0 {
+        target = <0xffffffff>;
+        // [FDT_REF_PHANDLE] target[0], ref = test
+        __overlay__ {
+            ref = <0xffffffff>;
+            // [FDT_REF_PHANDLE] ref[0], ref = node_a
+        };
+    };
+    __fixups__ {
+        test = "/fragment@0:target:0";
+        node_a = "/fragment@0/__overlay__:ref:0";
+    };
+};
diff --git a/tests/metadata_refphandle.dts b/tests/metadata_refphandle.dts
new file mode 100644
index 0000000..b8aa650
--- /dev/null
+++ b/tests/metadata_refphandle.dts
@@ -0,0 +1,11 @@
+// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause)
+/*
+ * Copyright (C) 2026 Bootlin
+ */
+
+/dts-v1/;
+/plugin/;
+
+&test {
+	ref = <&node_a>;
+};
diff --git a/tests/metadata_refphandle.dts.dts.expect b/tests/metadata_refphandle.dts.dts.expect
new file mode 100644
index 0000000..c229ec1
--- /dev/null
+++ b/tests/metadata_refphandle.dts.dts.expect
@@ -0,0 +1,17 @@
+/dts-v1/;
+
+/ {
+
+	fragment@0 {
+		target = <&test>;
+
+		__overlay__ {
+			ref = <&node_a>;
+		};
+	};
+
+	__fixups__ {
+		test = "/fragment@0:target:0";
+		node_a = "/fragment@0/__overlay__:ref:0";
+	};
+};
diff --git a/tests/run_tests.sh b/tests/run_tests.sh
index 7a8bdbc..423812e 100755
--- a/tests/run_tests.sh
+++ b/tests/run_tests.sh
@@ -1125,7 +1125,7 @@ wrap_fdtdump () {
 }
 
 metadata_tests() {
-	for dt in metadata_reflocal; do
+	for dt in metadata_reflocal metadata_refphandle; 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