dtc is able to sort orphan nodes when the --sort option is used.

Improve the metadata sort test to perform a check for this feature.

Signed-off-by: Herve Codina <herve.codina@bootlin.com>
---
 tests/metadata_sort.dtb.dts.expect | 39 ++++++++++++++++++++++++++++++
 tests/metadata_sort.dtb.expect     | 30 +++++++++++++++++++++++
 tests/metadata_sort.dts            | 33 +++++++++++++++++++++++++
 3 files changed, 102 insertions(+)

diff --git a/tests/metadata_sort.dtb.dts.expect b/tests/metadata_sort.dtb.dts.expect
index 270c06d..df3c02b 100644
--- a/tests/metadata_sort.dtb.dts.expect
+++ b/tests/metadata_sort.dtb.dts.expect
@@ -20,3 +20,42 @@
 		phandle = <0x01>;
 	};
 };
+
+&abc {
+	prop-a = "a";
+	prop-b = "b";
+
+	node-a {
+		prop = <0x01>;
+	};
+
+	node-b {
+		prop = <0x02>;
+	};
+
+	node-c {
+		prop = <0x03>;
+	};
+};
+
+&de1 {
+	prop-a = "a";
+	prop-b = "b";
+
+	node-a {
+		prop = <0x01>;
+	};
+
+	node-b {
+		prop = <0x02>;
+	};
+
+	node-c {
+		prop = <0x03>;
+	};
+};
+
+&de2 {
+	prop-a = "a";
+	prop-b = "b";
+};
diff --git a/tests/metadata_sort.dtb.expect b/tests/metadata_sort.dtb.expect
index 0dacab7..47002fe 100644
--- a/tests/metadata_sort.dtb.expect
+++ b/tests/metadata_sort.dtb.expect
@@ -16,3 +16,33 @@
 // [FDT_IMPORT_SYM] 'abc' (foo,bar)
 // [FDT_IMPORT_SYM] 'de1' (foo,bar)
 // [FDT_IMPORT_SYM] 'de2' (foo,bar)
+&abc {
+    prop-a = "a";
+    prop-b = "b";
+    node-a {
+        prop = <0x00000001>;
+    };
+    node-b {
+        prop = <0x00000002>;
+    };
+    node-c {
+        prop = <0x00000003>;
+    };
+};
+&de1 {
+    prop-a = "a";
+    prop-b = "b";
+    node-a {
+        prop = <0x00000001>;
+    };
+    node-b {
+        prop = <0x00000002>;
+    };
+    node-c {
+        prop = <0x00000003>;
+    };
+};
+&de2 {
+    prop-a = "a";
+    prop-b = "b";
+};
diff --git a/tests/metadata_sort.dts b/tests/metadata_sort.dts
index e523e20..3b690a5 100644
--- a/tests/metadata_sort.dts
+++ b/tests/metadata_sort.dts
@@ -23,3 +23,36 @@
 		/export/ a: &node_b;
 	};
 };
+
+&de2 {
+	prop-b = "b";
+	prop-a = "a";
+};
+
+&abc {
+	prop-b = "b";
+	prop-a = "a";
+	node-b {
+		prop = <2>;
+	};
+	node-a {
+		prop = <1>;
+	};
+	node-c {
+		prop = <3>;
+	};
+};
+
+&de1 {
+	prop-b = "b";
+	prop-a = "a";
+	node-b {
+		prop = <2>;
+	};
+	node-a {
+		prop = <1>;
+	};
+	node-c {
+		prop = <3>;
+	};
+};
-- 
2.52.0