embedded_view_params_unittests.cc

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// Copyright 2013 The Flutter 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 "flutter/flow/embedded_views.h"
#include "flutter/fml/logging.h"
#include "gtest/gtest.h"
 
namespace flutter {
namespace testing {
 
TEST(EmbeddedViewParams, GetBoundingRectAfterMutationsWithNoMutations) {
  MutatorsStack stack;
  SkMatrix matrix;
 
  EmbeddedViewParams params(matrix, SkSize::Make(1, 1), stack);
  const SkRect& rect = params.finalBoundingRect();
  ASSERT_TRUE(SkScalarNearlyEqual(rect.x(), 0));
  ASSERT_TRUE(SkScalarNearlyEqual(rect.y(), 0));
  ASSERT_TRUE(SkScalarNearlyEqual(rect.width(), 1));
  ASSERT_TRUE(SkScalarNearlyEqual(rect.height(), 1));
}
 
TEST(EmbeddedViewParams, GetBoundingRectAfterMutationsWithScale) {
  MutatorsStack stack;
  SkMatrix matrix = SkMatrix::Scale(2, 2);
  stack.PushTransform(matrix);
 
  EmbeddedViewParams params(matrix, SkSize::Make(1, 1), stack);
  const SkRect& rect = params.finalBoundingRect();
  ASSERT_TRUE(SkScalarNearlyEqual(rect.x(), 0));
  ASSERT_TRUE(SkScalarNearlyEqual(rect.y(), 0));
  ASSERT_TRUE(SkScalarNearlyEqual(rect.width(), 2));
  ASSERT_TRUE(SkScalarNearlyEqual(rect.height(), 2));
}
 
TEST(EmbeddedViewParams, GetBoundingRectAfterMutationsWithTranslate) {
  MutatorsStack stack;
  SkMatrix matrix = SkMatrix::Translate(1, 1);
  stack.PushTransform(matrix);
 
  EmbeddedViewParams params(matrix, SkSize::Make(1, 1), stack);
  const SkRect& rect = params.finalBoundingRect();
  ASSERT_TRUE(SkScalarNearlyEqual(rect.x(), 1));
  ASSERT_TRUE(SkScalarNearlyEqual(rect.y(), 1));
  ASSERT_TRUE(SkScalarNearlyEqual(rect.width(), 1));
  ASSERT_TRUE(SkScalarNearlyEqual(rect.height(), 1));
}
 
TEST(EmbeddedViewParams, GetBoundingRectAfterMutationsWithRotation90) {
  MutatorsStack stack;
  SkMatrix matrix;
  matrix.setRotate(90);
  stack.PushTransform(matrix);
 
  EmbeddedViewParams params(matrix, SkSize::Make(1, 1), stack);
  const SkRect& rect = params.finalBoundingRect();
 
  ASSERT_TRUE(SkScalarNearlyEqual(rect.x(), -1));
  ASSERT_TRUE(SkScalarNearlyEqual(rect.y(), 0));
  ASSERT_TRUE(SkScalarNearlyEqual(rect.width(), 1));
  ASSERT_TRUE(SkScalarNearlyEqual(rect.height(), 1));
}
 
TEST(EmbeddedViewParams, GetBoundingRectAfterMutationsWithRotation45) {
  MutatorsStack stack;
  SkMatrix matrix;
  matrix.setRotate(45);
  stack.PushTransform(matrix);
 
  EmbeddedViewParams params(matrix, SkSize::Make(1, 1), stack);
  const SkRect& rect = params.finalBoundingRect();
  ASSERT_TRUE(SkScalarNearlyEqual(rect.x(), -sqrt(2) / 2));
  ASSERT_TRUE(SkScalarNearlyEqual(rect.y(), 0));
  ASSERT_TRUE(SkScalarNearlyEqual(rect.width(), sqrt(2)));
  ASSERT_TRUE(SkScalarNearlyEqual(rect.height(), sqrt(2)));
}
 
TEST(EmbeddedViewParams,
     GetBoundingRectAfterMutationsWithTranslateScaleAndRotation) {
  SkMatrix matrix = SkMatrix::Translate(2, 2);
  matrix.preScale(3, 3);
  matrix.preRotate(90);
 
  MutatorsStack stack;
  stack.PushTransform(matrix);
 
  EmbeddedViewParams params(matrix, SkSize::Make(1, 1), stack);
  const SkRect& rect = params.finalBoundingRect();
  ASSERT_TRUE(SkScalarNearlyEqual(rect.x(), -1));
  ASSERT_TRUE(SkScalarNearlyEqual(rect.y(), 2));
  ASSERT_TRUE(SkScalarNearlyEqual(rect.width(), 3));
  ASSERT_TRUE(SkScalarNearlyEqual(rect.height(), 3));
}
 
}  // namespace testing
}  // namespace flutter