Add a self-test for gm, similar to our self-test for skdiff.

Review URL: https://codereview.appspot.com/6827068

git-svn-id: http://skia.googlecode.com/svn/trunk@6380 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 62 insertions, 0 deletions

diff --git a/gm/tests/run.sh b/gm/tests/run.sh
new file mode 100755
index 0000000000..276a77522a
--- /dev/null
+++ b/gm/tests/run.sh
@@ -0,0 +1,62 @@
+#!/bin/bash
+
+# Self-tests for gm, based on tools/tests/run.sh
+
+# cd into .../trunk so all the paths will work
+cd $(dirname $0)/../..
+
+# TODO(epoger): make it look in Release and/or Debug
+GM_BINARY=out/Debug/gm
+
+# Compare contents of all files within directories $1 and $2,
+# EXCEPT for any dotfiles.
+# If there are any differences, a description is written to stdout and
+# we exit with a nonzero return value.
+# Otherwise, we write nothing to stdout and return.
+function compare_directories {
+  if [ $# != 2 ]; then
+    echo "compare_directories requires exactly 2 parameters, got $#"
+    exit 1
+  fi
+  diff -r --exclude=.* $1 $2
+  if [ $? != 0 ]; then
+    echo "failed in: compare_directories $1 $2"
+    exit 1
+  fi
+}
+
+# Run gm...
+# - with the arguments in $1
+# - writing resulting images into $2/output-actual/images
+# - writing stdout into $2/output-actual/stdout
+# - writing return value into $2/output-actual/return_value
+# Then compare all of those against $2/output-expected .
+function gm_test {
+  if [ $# != 2 ]; then
+    echo "gm_test requires exactly 2 parameters, got $#"
+    exit 1
+  fi
+  GM_ARGS="$1"
+  ACTUAL_OUTPUT_DIR="$2/output-actual"
+  EXPECTED_OUTPUT_DIR="$2/output-expected"
+
+  rm -rf $ACTUAL_OUTPUT_DIR
+  mkdir -p $ACTUAL_OUTPUT_DIR
+  COMMAND="$GM_BINARY $GM_ARGS -w $ACTUAL_OUTPUT_DIR/images"
+  echo "$COMMAND" >$ACTUAL_OUTPUT_DIR/command_line
+  $COMMAND &>$ACTUAL_OUTPUT_DIR/stdout
+  echo $? >$ACTUAL_OUTPUT_DIR/return_value
+
+  compare_directories $EXPECTED_OUTPUT_DIR $ACTUAL_OUTPUT_DIR
+}
+
+GM_TESTDIR=gm/tests
+GM_INPUTS=$GM_TESTDIR/inputs
+GM_OUTPUTS=$GM_TESTDIR/outputs
+
+gm_test "--hierarchy --match dashing --config 4444 -r $GM_INPUTS/dashing-correct-images" "$GM_OUTPUTS/dashing-compared-against-correct"
+
+# In this case, dashing.png has different pixels, but dashing2.png differs only in PNG encoding (identical pixels)
+gm_test "--hierarchy --match dashing --config 4444 -r $GM_INPUTS/dashing-incorrect-images" "$GM_OUTPUTS/dashing-compared-against-incorrect"
+
+echo "All tests passed."