Add unit tests for Rect
Bug: 161793589
Test: atest Rect_test
Change-Id: I0a43cff94b5794fbc65d5c16d693f0f6fe35374d
diff --git a/libs/ui/tests/Rect_test.cpp b/libs/ui/tests/Rect_test.cpp
new file mode 100644
index 0000000..5499a5b
--- /dev/null
+++ b/libs/ui/tests/Rect_test.cpp
@@ -0,0 +1,262 @@
+/*
+ * Copyright 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <system/graphics.h>
+#include <ui/FloatRect.h>
+#include <ui/Point.h>
+#include <ui/Rect.h>
+#include <ui/Size.h>
+
+#include <gtest/gtest.h>
+
+namespace android::ui {
+
+TEST(RectTest, constructDefault) {
+ const Rect rect;
+ EXPECT_FALSE(rect.isValid());
+ EXPECT_TRUE(rect.isEmpty());
+}
+
+TEST(RectTest, constructFromWidthAndHeight) {
+ const Rect rect(100, 200);
+ EXPECT_TRUE(rect.isValid());
+ EXPECT_FALSE(rect.isEmpty());
+ EXPECT_EQ(0, rect.top);
+ EXPECT_EQ(0, rect.left);
+ EXPECT_EQ(100, rect.right);
+ EXPECT_EQ(200, rect.bottom);
+ EXPECT_EQ(100, rect.getWidth());
+ EXPECT_EQ(200, rect.getHeight());
+}
+
+TEST(RectTest, constructFromSize) {
+ const Rect rect(Size(100, 200));
+ EXPECT_TRUE(rect.isValid());
+ EXPECT_FALSE(rect.isEmpty());
+ EXPECT_EQ(0, rect.top);
+ EXPECT_EQ(0, rect.left);
+ EXPECT_EQ(100, rect.right);
+ EXPECT_EQ(200, rect.bottom);
+ EXPECT_EQ(100, rect.getWidth());
+ EXPECT_EQ(200, rect.getHeight());
+}
+
+TEST(RectTest, constructFromLTRB) {
+ const Rect rect(11, 12, 14, 14);
+ EXPECT_TRUE(rect.isValid());
+ EXPECT_FALSE(rect.isEmpty());
+ EXPECT_EQ(11, rect.left);
+ EXPECT_EQ(12, rect.top);
+ EXPECT_EQ(14, rect.right);
+ EXPECT_EQ(14, rect.bottom);
+ EXPECT_EQ(3, rect.getWidth());
+ EXPECT_EQ(2, rect.getHeight());
+}
+
+TEST(RectTest, constructFromPoints) {
+ const Rect rect(Point(11, 12), Point(14, 14));
+ EXPECT_TRUE(rect.isValid());
+ EXPECT_FALSE(rect.isEmpty());
+ EXPECT_EQ(11, rect.left);
+ EXPECT_EQ(12, rect.top);
+ EXPECT_EQ(14, rect.right);
+ EXPECT_EQ(14, rect.bottom);
+ EXPECT_EQ(3, rect.getWidth());
+ EXPECT_EQ(2, rect.getHeight());
+}
+
+TEST(RectTest, constructFromFloatRect) {
+ {
+ const Rect rect(FloatRect(10, 20, 30, 40));
+ EXPECT_TRUE(rect.isValid());
+ EXPECT_FALSE(rect.isEmpty());
+ EXPECT_EQ(10, rect.left);
+ EXPECT_EQ(20, rect.top);
+ EXPECT_EQ(30, rect.right);
+ EXPECT_EQ(40, rect.bottom);
+ }
+ // Construct with floating point error
+ {
+ constexpr float kError = 1e-3;
+ const Rect rect(FloatRect(10 - kError, 20 - kError, 30 - kError, 40 - kError));
+ EXPECT_TRUE(rect.isValid());
+ EXPECT_FALSE(rect.isEmpty());
+ EXPECT_EQ(10, rect.left);
+ EXPECT_EQ(20, rect.top);
+ EXPECT_EQ(30, rect.right);
+ EXPECT_EQ(40, rect.bottom);
+ }
+}
+
+TEST(RectTest, makeInvalid) {
+ Rect rect(10, 20, 60, 60);
+ EXPECT_TRUE(rect.isValid());
+ rect.makeInvalid();
+ EXPECT_FALSE(rect.isValid());
+}
+
+TEST(RectTest, clear) {
+ Rect rect(10, 20, 60, 60);
+ EXPECT_FALSE(rect.isEmpty());
+ rect.clear();
+ EXPECT_TRUE(rect.isEmpty());
+}
+
+TEST(RectTest, getSize) {
+ const Rect rect(10, 20, 60, 60);
+ EXPECT_EQ(Size(50, 40), rect.getSize());
+}
+
+TEST(RectTest, getBounds) {
+ const Rect rect(10, 20, 60, 60);
+ const Rect bounds = rect.getBounds();
+ EXPECT_EQ(0, bounds.left);
+ EXPECT_EQ(0, bounds.top);
+ EXPECT_EQ(50, bounds.right);
+ EXPECT_EQ(40, bounds.bottom);
+ EXPECT_EQ(rect.getSize(), bounds.getSize());
+}
+
+TEST(RectTest, getCornerPoints) {
+ const Rect rect(10, 20, 50, 60);
+ EXPECT_EQ(Point(10, 20), rect.leftTop());
+ EXPECT_EQ(Point(10, 60), rect.leftBottom());
+ EXPECT_EQ(Point(50, 20), rect.rightTop());
+ EXPECT_EQ(Point(50, 60), rect.rightBottom());
+}
+
+TEST(RectTest, operatorEquals) {
+ const Rect rect(10, 20, 50, 60);
+ EXPECT_EQ(rect, rect);
+ EXPECT_NE(Rect(0, 20, 50, 60), rect);
+ EXPECT_NE(Rect(10, 0, 50, 60), rect);
+ EXPECT_NE(Rect(10, 20, 0, 60), rect);
+ EXPECT_NE(Rect(10, 20, 50, 0), rect);
+}
+
+TEST(RectTest, operatorsPlusMinus) {
+ Rect rect = Rect(10, 20, 50, 60) + Point(1, 2);
+ EXPECT_EQ(Rect(11, 22, 51, 62), rect);
+ rect -= Point(1, 2);
+ EXPECT_EQ(Rect(10, 20, 50, 60), rect);
+
+ rect = Rect(10, 20, 50, 60) - Point(1, 2);
+ EXPECT_EQ(Rect(9, 18, 49, 58), rect);
+ rect += Point(1, 2);
+ EXPECT_EQ(Rect(10, 20, 50, 60), rect);
+}
+
+TEST(RectTest, scale) {
+ Rect rect(10, 20, 50, 60);
+ EXPECT_EQ(Rect(20, 60, 100, 180), rect.scale(2.f, 3.f));
+ rect.scaleSelf(2.f, 3.f);
+ EXPECT_EQ(Rect(20, 60, 100, 180), rect);
+
+ rect = Rect(10, 20, 50, 60);
+ constexpr float kError = 1e-3;
+ EXPECT_EQ(Rect(20, 60, 100, 180), rect.scale(2.f - kError, 3.f - kError));
+ rect.scaleSelf(2.f - kError, 3.f - kError);
+ EXPECT_EQ(Rect(20, 60, 100, 180), rect);
+}
+
+TEST(RectTest, inset) {
+ Rect rect(10, 20, 50, 60);
+ rect.inset(0, 0, 0, 0);
+ EXPECT_EQ(Rect(10, 20, 50, 60), rect);
+ rect.inset(1, 2, 3, 4);
+ EXPECT_EQ(Rect(11, 22, 47, 56), rect);
+}
+
+TEST(RectTest, intersect) {
+ const Rect rect(10, 20, 50, 60);
+ Rect intersection;
+
+ // Intersect with self is self
+ intersection.makeInvalid();
+ EXPECT_TRUE(rect.intersect(rect, &intersection));
+ EXPECT_EQ(Rect(10, 20, 50, 60), intersection);
+
+ // Intersect with rect contained in us
+ const Rect insideRect(11, 21, 45, 55);
+ intersection.makeInvalid();
+ EXPECT_TRUE(rect.intersect(insideRect, &intersection));
+ EXPECT_EQ(insideRect, intersection);
+
+ // Intersect with rect we are contained in
+ intersection.makeInvalid();
+ EXPECT_TRUE(insideRect.intersect(rect, &intersection));
+ EXPECT_EQ(insideRect, intersection);
+
+ // Empty intersection
+ intersection.makeInvalid();
+ EXPECT_FALSE(rect.intersect(Rect(100, 202, 150, 260), &intersection));
+ EXPECT_TRUE(intersection.isEmpty());
+
+ // Partial intersection
+ const Rect other(30, 40, 70, 80);
+ intersection.makeInvalid();
+ EXPECT_TRUE(rect.intersect(other, &intersection));
+ EXPECT_EQ(Rect(30, 40, 50, 60), intersection);
+
+ // Intersetion is commutative
+ intersection.makeInvalid();
+ EXPECT_TRUE(other.intersect(rect, &intersection));
+ EXPECT_EQ(Rect(30, 40, 50, 60), intersection);
+}
+
+TEST(RectTest, reduce) {
+ const Rect rect(10, 20, 50, 60);
+
+ // Reduce with self is empty
+ EXPECT_TRUE(rect.reduce(rect).isEmpty());
+
+ // Reduce with rect entirely inside is a noop
+ const Rect insideRect(11, 21, 45, 55);
+ EXPECT_EQ(rect, rect.reduce(insideRect));
+
+ // Reduce with rect entirely outside is empty
+ EXPECT_TRUE(insideRect.reduce(rect).isEmpty());
+
+ // Reduce with rect on the right
+ EXPECT_EQ(Rect(10, 20, 20, 60), rect.reduce(Rect(20, 0, 60, 70)));
+
+ // Reduce with rect on the left
+ EXPECT_EQ(Rect(40, 20, 50, 60), rect.reduce(Rect(0, 0, 40, 70)));
+
+ // Reduce with rect at the top
+ EXPECT_EQ(Rect(10, 40, 50, 60), rect.reduce(Rect(0, 0, 70, 40)));
+
+ // Reduce with rect at the bottom
+ EXPECT_EQ(Rect(10, 20, 50, 40), rect.reduce(Rect(0, 40, 70, 70)));
+}
+
+TEST(RectTest, transform) {
+ const int32_t width = 100, height = 200;
+ const Rect rect(1, 1, 2, 3);
+ EXPECT_EQ(Rect(98, 1, 99, 3), rect.transform(HAL_TRANSFORM_FLIP_H, width, height));
+ EXPECT_EQ(Rect(1, 197, 2, 199), rect.transform(HAL_TRANSFORM_FLIP_V, width, height));
+ EXPECT_EQ(Rect(197, 1, 199, 2), rect.transform(HAL_TRANSFORM_ROT_90, width, height));
+ EXPECT_EQ(Rect(98, 197, 99, 199), rect.transform(HAL_TRANSFORM_ROT_180, width, height));
+ EXPECT_EQ(Rect(1, 98, 3, 99), rect.transform(HAL_TRANSFORM_ROT_270, width, height));
+}
+
+TEST(RectTest, toFloatRect) {
+ const Rect rect(10, 20, 50, 60);
+ const FloatRect floatRect = rect.toFloatRect();
+ EXPECT_EQ(FloatRect(10.f, 20.f, 50.f, 60.f), floatRect);
+}
+
+} // namespace android::ui