Enable Media query evaluation in the preload scanner

Source/core/css/MediaQueryEvaluatorTest.cpp

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "config.h"
+#include "core/css/MediaQueryEvaluator.h"
+
+#include "core/css/MediaList.h"
+#include "core/css/MediaValues.h"
+#include "wtf/PassOwnPtr.h"
+#include "wtf/text/StringBuilder.h"
+
+#include <gtest/gtest.h>
+
+namespace WebCore {
+
+typedef struct {
+    const char* input;
+    const bool output;
+} TestCase;
+
+TEST(MediaQueryEvaluatorTest, Basic)
+{
+    // The first string represents the input string.
+    // The second string represents the output string, if present.
+    // Otherwise, the output string is identical to the first string.
+    TestCase screenTestCases[] = {
+        {"screen", 1},
+        {"screen and (color)", 1},
+        {"all and (min-width: 500px)", 1},
+        {"not screen and (color)", 0},
+        {"(min-width: 500px)", 1},
+        {"(min-width: 501px)", 0},
+        {"(max-width: 500px)", 1},
+        {"(max-width: 499px)", 0},
+        {"(width: 500px)", 1},
+        {"(width: 501px)", 0},
+        {"(min-height: 500px)", 1},
+        {"(min-height: 501px)", 0},
+        {"(max-height: 500px)", 1},
+        {"(max-height: 499px)", 0},
+        {"(height: 500px)", 1},
+        {"(height: 501px)", 0},
+        {"screen and (min-width: 400px) and (max-width: 700px)", 1},
+        {"screen and (device-aspect-ratio: 16/9)", 0},
+        {"screen and (device-aspect-ratio: 1/1)", 1},
+        {"all and (min-color: 2)", 1},
+        {"all and (min-color: 32)", 0},
+        {"all and (min-color-index: 0)", 1},
+        {"all and (min-color-index: 1)", 0},
+        {"all and (monochrome)", 0},
+        {"all and (min-monochrome: 0)", 1},
+        {"all and (grid: 0)", 1},
+        {"(resolution: 2dppx)", 1},
+        {"(resolution: 1dppx)", 0},
+        {"(orientation: portrait)", 1},
+        {"(orientation: landscape)", 0},
+        {"tv and (scan: progressive)", 0},
+        {"(pointer: coarse)", 0},
+        {"(pointer: fine)", 1},
+        {"(hover: 1)", 1},
+        {"(hover: 0)", 0},
+        {0, 0} // Do not remove the terminator line.
+    };
+    TestCase printTestCases[] = {
+        {"print and (min-resolution: 1dppx)", 1},
+        {"print and (min-resolution: 118dpcm)", 0},
+        {0, 0} // Do not remove the terminator line.
+    };
+
+    RefPtr<MediaValues> mediaValues = MediaValues::create(MediaValues::CachingMode,
+        500, // Viewport Width
+        500, // Viewport height
+        500, // Device Width
+        500, // Device Height
+        2.0, // Device pixel ratio
+        24, // Color bits per component
+        0, // Monochrome bits per component
+        MediaValues::MousePointer, // Pointer device
+        16, // Default font size
+        true, // 3D enabled
+        false, // scan media type
+        true, // screen media type
+        false, // print media type
+        true // Strict mode
+        );
+
+    for (unsigned i = 0; screenTestCases[i].input; ++i) {
+        RefPtrWillBeRawPtr<MediaQuerySet> querySet = MediaQuerySet::create(screenTestCases[i].input);
+        MediaQueryEvaluator mediaQueryEvaluator("screen", *mediaValues);
+        ASSERT_EQ(screenTestCases[i].output, mediaQueryEvaluator.eval(querySet.get()));
+    }
+    for (unsigned i = 0; printTestCases[i].input; ++i) {
+        RefPtrWillBeRawPtr<MediaQuerySet> querySet = MediaQuerySet::create(printTestCases[i].input);
+        MediaQueryEvaluator mediaQueryEvaluator("print", *mediaValues);
+        ASSERT_EQ(printTestCases[i].output, mediaQueryEvaluator.eval(querySet.get()));
+    }
+}
+
+} // namespace