Adding Blink-side 3d Box and Bounds calculations to TransformOperations

Source/platform/geometry/FloatBoxTestHelpers.h

+/*
+ * Copyright (C) 2014 Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1.  Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ * 2.  Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "platform/geometry/FloatBox.h"
+
+#include <gtest/gtest.h>
+
+namespace WebCore {
+inline void PrintTo(const FloatBox& box, ::std::ostream* os)
+{
+    *os << "FloatBox("
+        << box.x() << ", "
+        << box.y() << ", "
+        << box.z() << ", "
+        << box.width() << ", "
+        << box.height() << ", "
+        << box.depth() << ")";
+}
+
+namespace FloatBoxTest {
+#define TEST_EPSILON 1e-3
+inline bool ApproximatelyEqual(const FloatBox& a, const FloatBox& b)
+{
+    if (::fabsf(a.x() - b.x()) > TEST_EPSILON

[Ian Vollick, 2014/06/16 15:23:37]

Why not make an inline, "approximately equal" helper for floats? (And could that
helper use relative rather than absolute error and also maybe use a static
constant float rather than a #define?)

[awoloszyn, 2014/06/17 14:26:00]

Done.

+        || ::fabsf(a.y() - b.y()) > TEST_EPSILON
+        || ::fabsf(a.z() - b.z()) > TEST_EPSILON
+        || ::fabsf(a.width() - b.width()) > TEST_EPSILON
+        || ::fabsf(a.height() - b.height()) > TEST_EPSILON
+        || ::fabsf(a.depth() - b.depth()) > TEST_EPSILON) {
+        return(false);
+    }
+    return(true);
+}
+
+inline ::testing::AssertionResult AssertAlmostEqual(const char* m_expr, const char* n_expr, const FloatBox& m, const FloatBox& n)
+{
+    if (!ApproximatelyEqual(m, n)) {
+        return ::testing::AssertionFailure() << "       Value of:" << n_expr << std::endl
+            << "         Actual:" << testing::PrintToString(n) << std::endl
+            << "Expected Approx:" << m_expr << std::endl
+            << "       Which is:" << ::testing::PrintToString(m);
+    }
+    return ::testing::AssertionSuccess();
+}
+
+inline ::testing::AssertionResult AssertContains(const char* m_expr, const char* n_expr, const FloatBox& m, const FloatBox& n)
+{
+    FloatBox newM = m;
+    newM.expandTo(n);
+    if (!ApproximatelyEqual(m, newM)) {
+        return ::testing::AssertionFailure() << "        Value of:" << n_expr << std::endl
+            << "          Actual:" << testing::PrintToString(n) << std::endl
+            << "Not Contained in:" << m_expr << std::endl
+            << "        Which is:" << ::testing::PrintToString(m);
+    }
+    return ::testing::AssertionSuccess();
+}
+
+}
+}
+