Unit testing for SkTileGrid
Review URL: https://codereview.appspot.com/6827053
git-svn-id: http://skia.googlecode.com/svn/trunk@6331 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/tests/TileGridTest.cpp b/tests/TileGridTest.cpp
new file mode 100644
index 0000000..e0c855c
--- /dev/null
+++ b/tests/TileGridTest.cpp
@@ -0,0 +1,60 @@
+
+/*
+ * 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 "SkTileGrid.h"
+
+enum Tile {
+ kTopLeft_Tile = 0x1,
+ kTopRight_Tile = 0x2,
+ kBottomLeft_Tile = 0x4,
+ kBottomRight_Tile = 0x8,
+
+ kAll_Tile = kTopLeft_Tile | kTopRight_Tile | kBottomLeft_Tile | kBottomRight_Tile,
+};
+
+class TileGridTest {
+public:
+ static void verifyTileHits(skiatest::Reporter* reporter, SkIRect rect, uint32_t tileMask) {
+ SkTileGrid grid(10, 10, 2, 2);
+ grid.insert(NULL, rect, false);
+ REPORTER_ASSERT(reporter, grid.tile(0,0).count() ==
+ ((tileMask & kTopLeft_Tile)? 1 : 0));
+ REPORTER_ASSERT(reporter, grid.tile(1,0).count() ==
+ ((tileMask & kTopRight_Tile)? 1 : 0));
+ REPORTER_ASSERT(reporter, grid.tile(0,1).count() ==
+ ((tileMask & kBottomLeft_Tile)? 1 : 0));
+ REPORTER_ASSERT(reporter, grid.tile(1,1).count() ==
+ ((tileMask & kBottomRight_Tile)? 1 : 0));
+ }
+
+ static void Test(skiatest::Reporter* reporter) {
+ // Out of bounds
+ verifyTileHits(reporter, SkIRect::MakeXYWH(30, 0, 1, 1), 0);
+ verifyTileHits(reporter, SkIRect::MakeXYWH(0, 30, 1, 1), 0);
+ verifyTileHits(reporter, SkIRect::MakeXYWH(-10, 0, 1, 1), 0);
+ verifyTileHits(reporter, SkIRect::MakeXYWH(0, -10, 1, 1), 0);
+
+ // Dilation for AA consideration
+ verifyTileHits(reporter, SkIRect::MakeXYWH(0, 0, 8, 8), kTopLeft_Tile);
+ verifyTileHits(reporter, SkIRect::MakeXYWH(0, 0, 9, 9), kAll_Tile);
+ verifyTileHits(reporter, SkIRect::MakeXYWH(10, 10, 1, 1), kAll_Tile);
+ verifyTileHits(reporter, SkIRect::MakeXYWH(11, 11, 1, 1), kBottomRight_Tile);
+
+ // BBoxes that overlap tiles
+ verifyTileHits(reporter, SkIRect::MakeXYWH(5, 5, 10, 1), kTopLeft_Tile | kTopRight_Tile);
+ verifyTileHits(reporter, SkIRect::MakeXYWH(5, 5, 1, 10), kTopLeft_Tile |
+ kBottomLeft_Tile);
+ verifyTileHits(reporter, SkIRect::MakeXYWH(5, 5, 10, 10), kAll_Tile);
+ verifyTileHits(reporter, SkIRect::MakeXYWH(-10, -10, 40, 40), kAll_Tile);
+ }
+};
+
+
+#include "TestClassDef.h"
+DEFINE_TESTCLASS("TileGrid", TileGridTestClass, TileGridTest::Test)