dtoc: Add a test for the fdt_util.EnsureCompiled with indir

Provide a test which covers this feature of the EnsureCompiled()
function.

Signed-off-by: Simon Glass <sjg@chromium.org>

tools/dtoc/test/dtoc_test_inc.dts

@@ -0,0 +1,14 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Test device tree file for dtoc
+ *
+ * Copyright 2017 Google, Inc
+ */
+
+/dts-v1/;
+
+/ {
+};
+
+/include/ "test-include.dtsi"
+#include "test-include.dtsi"

tools/dtoc/test/test-include.dtsi

@@ -0,0 +1,5 @@
+// SPDX-License-Identifier: GPL-2.0+
+/ {
+	#address-cells = <1>;
+	#size-cells = <1>;
+};

tools/dtoc/test_fdt.py

@@ -932,6 +932,16 @@ class TestFdtUtil(unittest.TestCase):
         finally:
             tools.outdir = old_outdir
 
+    def test_ensure_compiled_indir(self):
+        """Test compiling with input directories specified"""
+        tmpdir = tempfile.mkdtemp(prefix='test_fdt.')
+        dest = os.path.join(tmpdir, 'try.dts')
+        shutil.copy(find_dtb_file('dtoc_test_inc.dts'), dest)
+
+        dtb = fdt_util.EnsureCompiled(dest, indir=['tools/dtoc/test'])
+        self.assertEqual(dtb, fdt_util.EnsureCompiled(dtb))
+        shutil.rmtree(tmpdir)
+
     def test_get_phandle_name_offset(self):
         val = fdt_util.GetPhandleNameOffset(self.node, 'missing')
         self.assertIsNone(val)