[PATCH] tests: compare the DTS generated from the tree against a model one

[Lubomir Rintel <lkundrak@xxxxx>]

This would catch the cases, where the output DTS still parses well and
produces a tree that we expect, yet it contains some weirdness.

Signed-off-by: Lubomir Rintel <lkundrak@xxxxx>
---
 tests/fs_tree1.dts | 43 +++++++++++++++++++++++++++++++++++++++++++
 tests/run_tests.sh | 14 ++++++++++++++
 2 files changed, 57 insertions(+)
 create mode 100644 tests/fs_tree1.dts

diff --git a/tests/fs_tree1.dts b/tests/fs_tree1.dts
new file mode 100644
index 0000000..aeae436
--- /dev/null
+++ b/tests/fs_tree1.dts
@@ -0,0 +1,43 @@
+/dts-v1/;
+
+/ {
+	compatible = "test_tree1";
+	#address-cells = <0x01>;
+	#size-cells = <0x00>;
+	prop-str = "hello world";
+	prop-int = <0xdeadbeef>;
+	prop-int64 = <0xdeadbeef 0x1abcdef>;
+
+	subnode@2 {
+		#address-cells = <0x01>;
+		linux,phandle = <0x2000>;
+		#size-cells = <0x00>;
+		reg = <0x02>;
+		prop-int = <0x75bcd15>;
+
+		subsubnode@0 {
+			compatible = "subsubnode2\0subsubnode";
+			phandle = <0x2001>;
+			reg = <0x00>;
+			prop-int = <0x75bcd15>;
+		};
+
+		ss2 {
+		};
+	};
+
+	subnode@1 {
+		compatible = "subnode1";
+		reg = <0x01>;
+		prop-int = <0xdeadbeef>;
+
+		ss1 {
+		};
+
+		subsubnode {
+			compatible = "subsubnode1\0subsubnode";
+			placeholder = "this is a placeholder string\0string2";
+			prop-int = <0xdeadbeef>;
+		};
+	};
+};
diff --git a/tests/run_tests.sh b/tests/run_tests.sh
index bc2cc77..e6483b7 100755
--- a/tests/run_tests.sh
+++ b/tests/run_tests.sh
@@ -137,6 +137,19 @@ check_align () {
     )
 }
 
+# $1: first file
+# $2: second file
+files_equal () {
+    shorten_echo "files_equal $@:	"
+    (
+	if diff -q $1 $2; then
+	    PASS
+	else
+	    FAIL "File $1 differs from $2"
+	fi
+    )
+}
+
 run_dtc_test () {
     printf "dtc $*:	"
     base_run_test wrap_test $VALGRIND $DTC "$@"
@@ -460,6 +473,7 @@ libfdt_tests () {
     run_dtc_test -I fs -O dts -o fs.test_tree1.test.dts $FSBASE/test_tree1
     run_dtc_test -I fs -O dtb -o fs.test_tree1.test.dtb $FSBASE/test_tree1
     run_test dtbs_equal_unordered -m fs.test_tree1.test.dtb test_tree1.dtb
+    base_run_test files_equal fs_tree1.dts fs.test_tree1.test.dts
 
     # check full tests
     for good in test_tree1.dtb; do
-- 
2.19.0