dtc: Add basic testcases for dtc

This patch adds a handful of simple testcases for dtc.  It adds a dts
file which should generate the same sample tree as is used for the
libfdt testcases, and tests invoking dtc on this dts, plus the
standard batch of libfdt cases on the resulting dtb, which effectively
checks that the dtb is correct.

Because the test framework assumes each testcase is an executable with
the right output conventions, we use a little shell script, dtc.sh, as
a wrapper around dtc itself.  It simply invokes dtc and returns a PASS
or FAIL depending on whether dtc returned an error.

It's not much, but it's a start.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

tests/Makefile.tests

@@ -43,10 +43,10 @@ tests_clean:
 	rm -f $(STD_CLEANFILES:%=$(TESTS_PREFIX)%)
 	rm -f $(TESTS_CLEANFILES)
 
-check:	tests
+check:	tests dtc
 	cd $(TESTS_PREFIX); ./run_tests.sh
 
-checkv:	tests
+checkv:	tests dtc
 	cd $(TESTS_PREFIX); ./run_tests.sh -v
 
 ifneq ($(DEPTARGETS),)

tests/dtc.sh

@@ -0,0 +1,28 @@
+#! /bin/sh
+
+PASS () {
+    echo "PASS"
+    exit 0
+}
+
+FAIL () {
+    echo "FAIL" "$@"
+    exit 2
+}
+
+DTC=../dtc
+
+verbose_run () {
+    if [ -z "$QUIET_TEST" ]; then
+	"$@"
+    else
+	"$@" > /dev/null 2> /dev/null
+    fi
+}
+
+if verbose_run "$DTC" "$@"; then
+    PASS
+else
+    ret="$?"
+    FAIL "dtc returned error code $ret"
+fi

tests/run_tests.sh

@@ -86,6 +86,14 @@ libfdt_tests () {
     run_test truncated_property
 }
 
+dtc_tests () {
+    # Make sure we don't have stale blobs lying around
+    rm -f *.test.dtb
+
+    run_test dtc.sh -f -I dts -O dtb -o dtc_tree1.test.dtb test_tree1.dts
+    tree1_tests dtc_tree1.test.dtb
+}
+
 while getopts "vdt:" ARG ; do
     case $ARG in
 	"v")
@@ -98,7 +106,7 @@ while getopts "vdt:" ARG ; do
 done
 
 if [ -z "$TESTSETS" ]; then
-    TESTSETS="libfdt"
+    TESTSETS="libfdt dtc"
 fi
 
 for set in $TESTSETS; do
@@ -106,6 +114,9 @@ for set in $TESTSETS; do
 	"libfdt")
 	    libfdt_tests
 	    ;;
+	"dtc")
+	    dtc_tests
+	    ;;
     esac
 done
 

tests/test_tree1.dts

@@ -0,0 +1,20 @@
+/ {
+	prop-int = <deadbeef>;
+	prop-str = "hello world";
+
+	subnode1 {
+		prop-int = <deadbeef>;
+
+		subsubnode {
+			prop-int = <deadbeef>;
+		};
+	};
+
+	subnode2 {
+		prop-int = <abcd1234>;
+
+		subsubnode {
+			prop-int = <abcd1234>;
+		};
+	};
+};