[RFC PATCH 67/77] tests: metadata: Add a test for namespace labels references

Namespace labels references are references in the form '&foo.bar.baz'.

Support for namespace labels references has been recently added to dtc.

Add a test related to this kind of references.

Signed-off-by: Herve Codina <[email protected]>
---
 ...metadata_addon_refnamespace.dtb.dts.expect | 32 ++++++++++++++++
 tests/metadata_addon_refnamespace.dtb.expect  | 29 ++++++++++++++
 tests/metadata_addon_refnamespace.dts         | 38 +++++++++++++++++++
 ...metadata_addon_refnamespace.dts.dts.expect | 32 ++++++++++++++++
 tests/run_tests.sh                            |  3 +-
 5 files changed, 133 insertions(+), 1 deletion(-)
 create mode 100644 tests/metadata_addon_refnamespace.dtb.dts.expect
 create mode 100644 tests/metadata_addon_refnamespace.dtb.expect
 create mode 100644 tests/metadata_addon_refnamespace.dts
 create mode 100644 tests/metadata_addon_refnamespace.dts.dts.expect

diff --git a/tests/metadata_addon_refnamespace.dtb.dts.expect b/tests/metadata_addon_refnamespace.dtb.dts.expect
new file mode 100644
index 0000000..111a746
--- /dev/null
+++ b/tests/metadata_addon_refnamespace.dtb.dts.expect
@@ -0,0 +1,32 @@
+/dts-v1/;
+/addon/;
+
+/import/ foo: "abc,foo";
+/import/ bar: "abc,bar";
+
+
+&foo.x {
+
+	addon-node {
+		ref0 = <&foo.x.y>;
+		ref1 = <0x0a &bar.other 0x14>;
+		ref2 = <&{$foo.x.y.z/addon-node}>;
+		ref3 = <&{$foo.x.y.z/addon-node}>;
+	};
+};
+
+&foo.x.y.z {
+
+	addon-node {
+		prop = <0x00>;
+		phandle = <0x01>;
+	};
+};
+
+&foo.x.y {
+
+	node {
+		prop1 = <0x01>;
+		prop2 = <0x02>;
+	};
+};
diff --git a/tests/metadata_addon_refnamespace.dtb.expect b/tests/metadata_addon_refnamespace.dtb.expect
new file mode 100644
index 0000000..5fceb61
--- /dev/null
+++ b/tests/metadata_addon_refnamespace.dtb.expect
@@ -0,0 +1,29 @@
+/dts-v1/;
+/addon/;
+
+// [FDT_IMPORT_SYM] 'foo' (abc,foo)
+// [FDT_IMPORT_SYM] 'bar' (abc,bar)
+&foo.x {
+    addon-node {
+        ref0 = <0xffffffff>;
+        // [FDT_REF_PHANDLE] ref0[0], ref = foo.x.y
+        ref1 = <0x0000000a 0xffffffff 0x00000014>;
+        // [FDT_REF_PHANDLE] ref1[4], ref = bar.other
+        ref2 = <0x00000001>;
+        // [FDT_REF_LOCAL] ref2[0]
+        ref3 = <0x00000001>;
+        // [FDT_REF_LOCAL] ref3[0]
+    };
+};
+&foo.x.y.z {
+    addon-node {
+        prop = <0x00000000>;
+        phandle = <0x00000001>;
+    };
+};
+&foo.x.y {
+    node {
+        prop1 = <0x00000001>;
+        prop2 = <0x00000002>;
+    };
+};
diff --git a/tests/metadata_addon_refnamespace.dts b/tests/metadata_addon_refnamespace.dts
new file mode 100644
index 0000000..51a17a9
--- /dev/null
+++ b/tests/metadata_addon_refnamespace.dts
@@ -0,0 +1,38 @@
+// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause)
+/*
+ * Copyright (C) 2026 Bootlin
+ */
+
+/dts-v1/;
+/addon/;
+
+/import/ foo: "abc,foo";
+/import/ bar: "abc,bar";
+
+
+&foo.x {
+	addon-node {
+		ref0 = <&foo.x.y>;
+		ref1 = <10 &bar.other 20>;
+		ref2 = <&addon_node>;
+		ref3 = <&{$foo.x.y.z/addon-node}>;
+	};
+};
+
+&foo.x.y.z {
+	addon_node: addon-node {
+		prop = <0>;
+	};
+};
+
+&foo.x.y {
+	node {
+		prop1 = <1>;
+	};
+};
+
+&foo.x.y {
+	node {
+		prop2 = <2>;
+	};
+};
diff --git a/tests/metadata_addon_refnamespace.dts.dts.expect b/tests/metadata_addon_refnamespace.dts.dts.expect
new file mode 100644
index 0000000..94861c3
--- /dev/null
+++ b/tests/metadata_addon_refnamespace.dts.dts.expect
@@ -0,0 +1,32 @@
+/dts-v1/;
+/addon/;
+
+/import/ foo: "abc,foo";
+/import/ bar: "abc,bar";
+
+
+&foo.x {
+
+	addon-node {
+		ref0 = <&foo.x.y>;
+		ref1 = <0x0a &bar.other 0x14>;
+		ref2 = <&addon_node>;
+		ref3 = <&{$foo.x.y.z/addon-node}>;
+	};
+};
+
+&foo.x.y.z {
+
+	addon_node: addon-node {
+		prop = <0x00>;
+		phandle = <0x01>;
+	};
+};
+
+&foo.x.y {
+
+	node {
+		prop1 = <0x01>;
+		prop2 = <0x02>;
+	};
+};
diff --git a/tests/run_tests.sh b/tests/run_tests.sh
index a371377..4392752 100755
--- a/tests/run_tests.sh
+++ b/tests/run_tests.sh
@@ -1129,7 +1129,8 @@ metadata_tests() {
 		  metadata_addon_base metadata_exportsyms_local \
 		  metadata_exportsyms_ref metadata_importsyms \
 		  metadata_addon_orphan1 metadata_addon_orphan2 \
-		  metadata_addon_orphan3 metadata_addon_references; do
+		  metadata_addon_orphan3 metadata_addon_references \
+		  metadata_addon_refnamespace; 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