Allow specific files and multiple inputs for picture testing tools.

Changed the render_pictures, bench_pictures and test_pictures.py so that multiple inputs can be given. Furthermore, specific files can also be specified.

Unit tests have also been added for picture_utils.cpp.

Committed http://code.google.com/p/skia/source/detail?r=4486

Review URL: https://codereview.appspot.com/6345054

git-svn-id: http://skia.googlecode.com/svn/trunk@4488 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/tests/PictureUtilsTest.cpp b/tests/PictureUtilsTest.cpp
new file mode 100644
index 0000000..e744931
--- /dev/null
+++ b/tests/PictureUtilsTest.cpp
@@ -0,0 +1,54 @@
+/*
+ * Copyright 2012 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+#include "Test.h"
+#include "picture_utils.h"
+#include "SkString.h"
+
+static void test_filepath_creation(skiatest::Reporter* reporter) {
+    SkString result;
+    SkString filename("test");
+    const char* dir = "test/path";
+    sk_tools::make_filepath(&result, dir, filename);
+    REPORTER_ASSERT(reporter, result.equals("test/path/test"));
+}
+
+static void test_get_basename(skiatest::Reporter* reporter) {
+    SkString result;
+    SkString path("/path/basename");
+    sk_tools::get_basename(&result, path);
+    REPORTER_ASSERT(reporter, result.equals("basename"));
+
+    result.reset();
+    path.set("/path/dir/");
+    sk_tools::get_basename(&result, path);
+    REPORTER_ASSERT(reporter, result.equals("dir"));
+
+    result.reset();
+    path.set("path");
+    sk_tools::get_basename(&result, path);
+    REPORTER_ASSERT(reporter, result.equals("path"));
+
+#if defined(SK_BUILD_FOR_WIN)
+    result.reset();
+    path.set("path\\winbasename");
+    sk_tools::get_basename(&result, path);
+    REPORTER_ASSERT(reporter, result.equals("winbasename"));
+
+    result.reset();
+    path.set("path\\windir\\");
+    sk_tools::get_basename(&result, path);
+    REPORTER_ASSERT(reporter, result.equals("windir"));
+#endif
+}
+
+static void TestPictureUtils(skiatest::Reporter* reporter) {
+    test_filepath_creation(reporter);
+    test_get_basename(reporter);
+}
+
+#include "TestClassDef.h"
+DEFINE_TESTCLASS("PictureUtils", PictureUtilsTestClass, TestPictureUtils)