dtoc: Add tests

Add some tests of dtoc's functionality to make it easier to expand and
enhance the tool.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/tools/dtoc/dtoc_test_simple.dts b/tools/dtoc/dtoc_test_simple.dts
new file mode 100644
index 0000000..c736686
--- /dev/null
+++ b/tools/dtoc/dtoc_test_simple.dts
@@ -0,0 +1,48 @@
+/*
+ * Test device tree file for dtoc
+ *
+ * Copyright 2017 Google, Inc
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+ /dts-v1/;
+
+/ {
+	spl-test {
+		u-boot,dm-pre-reloc;
+		compatible = "sandbox,spl-test";
+		boolval;
+		intval = <1>;
+		intarray = <2 3 4>;
+		byteval = [05];
+		bytearray = [06];
+		longbytearray = [09 0a 0b 0c 0d 0e 0f 10 11];
+		stringval = "message";
+		stringarray = "multi-word", "message";
+	};
+
+	spl-test2 {
+		u-boot,dm-pre-reloc;
+		compatible = "sandbox,spl-test";
+		intval = <3>;
+		intarray = <5>;
+		byteval = [08];
+		bytearray = [01 23 34];
+		longbytearray = [09 0a 0b 0c];
+		stringval = "message2";
+		stringarray = "another", "multi-word", "message";
+	};
+
+	spl-test3 {
+		u-boot,dm-pre-reloc;
+		compatible = "sandbox,spl-test";
+		stringarray = "one";
+	};
+
+	spl-test4 {
+		u-boot,dm-pre-reloc;
+		compatible = "sandbox,spl-test.2";
+	};
+
+};