[dali_2.3.22] Merge branch 'devel/master'
[platform/core/uifw/dali-toolkit.git] / automated-tests / src / dali-toolkit-internal / utc-Dali-TextureManager.cpp
index f12b096..a4e177c 100644 (file)
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2022 Samsung Electronics Co., Ltd.
+ * Copyright (c) 2024 Samsung Electronics Co., Ltd.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -20,6 +20,7 @@
 #include <stdlib.h>
 
 #include <dali-toolkit-test-suite-utils.h>
+#include <toolkit-environment-variable.h>
 #include <toolkit-event-thread-callback.h>
 #include <toolkit-timer.h>
 
@@ -28,6 +29,8 @@
 #include <dali-toolkit/internal/texture-manager/texture-upload-observer.h>
 #include <dali-toolkit/internal/visuals/image-atlas-manager.h>
 #include <dali-toolkit/internal/visuals/visual-factory-impl.h> ///< For VisualFactory's member TextureManager.
+#include <dali-toolkit/public-api/image-loader/image-url.h>
+#include <dali-toolkit/public-api/image-loader/image.h>
 #include <dali/devel-api/adaptor-framework/pixel-buffer.h>
 
 #include <test-encoded-image-buffer.h>
@@ -60,6 +63,9 @@ const char* TEST_IMAGE_3_FILE_NAME = TEST_RESOURCE_DIR "/icon-edit.png";
 const char* TEST_IMAGE_4_FILE_NAME = TEST_RESOURCE_DIR "/application-icon-20.png";
 const char* TEST_MASK_FILE_NAME    = TEST_RESOURCE_DIR "/mask.png";
 
+const char* TEST_SVG_FILE_NAME                   = TEST_RESOURCE_DIR "/svg1.svg";
+const char* TEST_ANIMATED_VECTOR_IMAGE_FILE_NAME = TEST_RESOURCE_DIR "/insta_camera.json";
+
 class TestObserver : public Dali::Toolkit::TextureUploadObserver
 {
 public:
@@ -124,7 +130,7 @@ public:
     mTextureSet     = textureInformation.textureSet;
 
     // Remove during LoadComplete
-    mTextureManagerPtr->Remove(textureInformation.textureId, nullptr);
+    mTextureManagerPtr->RequestRemove(textureInformation.textureId, nullptr);
 
     // ...And generate string which using texture id.
     mGeneratedExternalUrl = mTextureManagerPtr->AddExternalTexture(mTextureSet);
@@ -202,7 +208,6 @@ int UtcTextureManagerRequestLoad(void)
     ImageDimensions(),
     FittingMode::SCALE_TO_FILL,
     SamplingMode::BOX_THEN_LINEAR,
-    TextureManager::UseAtlas::NO_ATLAS,
     &observer,
     true,
     TextureManager::ReloadPolicy::CACHED,
@@ -229,7 +234,6 @@ int UtcTextureManagerGenerateHash(void)
     ImageDimensions(),
     FittingMode::SCALE_TO_FILL,
     SamplingMode::BOX_THEN_LINEAR,
-    TextureManager::UseAtlas::NO_ATLAS,
     &observer,
     true,
     TextureManager::ReloadPolicy::CACHED,
@@ -256,7 +260,7 @@ int UtcTextureManagerEncodedImageBuffer(void)
 
   std::string url1 = textureManager.AddEncodedImageBuffer(buffer1);
   std::string url2 = textureManager.AddEncodedImageBuffer(buffer1);
-  std::string url3 = VisualUrl::CreateBufferUrl(""); ///< Impossible Buffer URL. for coverage
+  std::string url3 = VisualUrl::CreateBufferUrl("", ""); ///< Impossible Buffer URL. for coverage
 
   // Check if same EncodedImageBuffer get same url
   DALI_TEST_CHECK(url1 == url2);
@@ -277,7 +281,6 @@ int UtcTextureManagerEncodedImageBuffer(void)
     ImageDimensions(),
     FittingMode::SCALE_TO_FILL,
     SamplingMode::BOX_THEN_LINEAR,
-    TextureManager::UseAtlas::NO_ATLAS,
     &observer1,
     true, ///< orientationCorrection
     TextureManager::ReloadPolicy::CACHED,
@@ -351,7 +354,6 @@ int UtcTextureManagerEncodedImageBuffer(void)
     ImageDimensions(),
     FittingMode::SCALE_TO_FILL,
     SamplingMode::BOX_THEN_LINEAR,
-    TextureManager::UseAtlas::NO_ATLAS,
     &observer3,
     true, ///< orientationCorrection
     TextureManager::ReloadPolicy::CACHED,
@@ -368,7 +370,6 @@ int UtcTextureManagerEncodedImageBuffer(void)
     ImageDimensions(),
     FittingMode::SCALE_TO_FILL,
     SamplingMode::BOX_THEN_LINEAR,
-    TextureManager::UseAtlas::NO_ATLAS,
     &observer4,
     true, ///< orientationCorrection
     TextureManager::ReloadPolicy::FORCED,
@@ -435,6 +436,325 @@ int UtcTextureManagerEncodedImageBuffer(void)
   END_TEST;
 }
 
+int UtcTextureManagerEncodedImageBufferWithImageType(void)
+{
+  ToolkitTestApplication application;
+  tet_infoline("UtcTextureManagerEncodedImageBufferWithImageType");
+
+  auto  visualFactory  = Toolkit::VisualFactory::Get();
+  auto& textureManager = GetImplementation(visualFactory).GetTextureManager(); // Use VisualFactory's texture manager
+
+  // Get encoded raw-buffer image and generate url
+  EncodedImageBuffer buffer1 = ConvertFileToEncodedImageBuffer(TEST_SVG_FILE_NAME);
+  EncodedImageBuffer buffer2 = ConvertFileToEncodedImageBuffer(TEST_ANIMATED_VECTOR_IMAGE_FILE_NAME);
+
+  std::string url1 = textureManager.AddEncodedImageBuffer(buffer1);
+  std::string url2 = textureManager.AddEncodedImageBuffer(buffer1);
+
+  // Check if same EncodedImageBuffer get same url
+  DALI_TEST_CHECK(url1 == url2);
+  // Reduce reference count
+  textureManager.RemoveEncodedImageBuffer(url1);
+  // Check whethere url1 still valid
+  DALI_TEST_CHECK(textureManager.GetEncodedImageBuffer(url1));
+
+  url2 = textureManager.AddEncodedImageBuffer(buffer2);
+  // Check if difference EncodedImageBuffer get difference url
+  DALI_TEST_CHECK(url1 != url2);
+
+  buffer1.SetImageType(EncodedImageBuffer::ImageType::VECTOR_IMAGE);
+  buffer2.SetImageType(EncodedImageBuffer::ImageType::ANIMATED_VECTOR_IMAGE);
+
+  std::string url1AfterType = textureManager.AddEncodedImageBuffer(buffer1);
+  std::string url2AfterType = textureManager.AddEncodedImageBuffer(buffer2);
+
+  // Check if EncodedImageBuffer with imagetype get difference url.
+  DALI_TEST_CHECK(url1 != url1AfterType);
+  DALI_TEST_CHECK(url2 != url2AfterType);
+  DALI_TEST_CHECK(url1AfterType != url2AfterType);
+
+  int  bufferId      = std::atoi(VisualUrl::GetLocationWithoutExtension(url1AfterType).c_str());
+  auto urlFromBuffer = textureManager.GetVisualUrl(bufferId);
+
+  // Check url from buffer id is equal with what we know.
+  DALI_TEST_CHECK(url1AfterType == urlFromBuffer.GetUrl());
+
+  // Reduce reference count
+  textureManager.RemoveEncodedImageBuffer(url1AfterType);
+  // Check whethere url1 still valid
+  DALI_TEST_CHECK(textureManager.GetEncodedImageBuffer(url1AfterType));
+
+  // Reduce reference count
+  textureManager.RemoveEncodedImageBuffer(url1AfterType);
+  // Check whethere url1 is invalid
+  DALI_TEST_CHECK(!textureManager.GetEncodedImageBuffer(url1AfterType));
+
+  // Reduce reference count
+  textureManager.RemoveEncodedImageBuffer(url2);
+  // Check whethere url2 is still valid
+  DALI_TEST_CHECK(textureManager.GetEncodedImageBuffer(url2));
+
+  // Reduce reference count
+  textureManager.RemoveEncodedImageBuffer(url2);
+  // Check whethere url2 is invalid
+  DALI_TEST_CHECK(!textureManager.GetEncodedImageBuffer(url2));
+
+  END_TEST;
+}
+
+int UtcTextureManagerExternalTexture(void)
+{
+  ToolkitTestApplication application;
+  tet_infoline("UtcTextureManagerExternalTexture check TextureManager using external texture works well");
+
+  auto  visualFactory  = Toolkit::VisualFactory::Get();
+  auto& textureManager = GetImplementation(visualFactory).GetTextureManager(); // Use VisualFactory's texture manager
+
+  TestObserver observer1;
+  TestObserver observer2;
+
+  auto                               textureId1(TextureManager::INVALID_TEXTURE_ID);
+  auto                               textureId2(TextureManager::INVALID_TEXTURE_ID);
+  std::string                        maskname(TEST_MASK_FILE_NAME);
+  TextureManager::MaskingDataPointer maskInfo = nullptr;
+  maskInfo.reset(new TextureManager::MaskingData());
+  maskInfo->mAlphaMaskUrl       = maskname;
+  maskInfo->mAlphaMaskId        = TextureManager::INVALID_TEXTURE_ID;
+  maskInfo->mCropToMask         = true;
+  maskInfo->mContentScaleFactor = 1.0f;
+  Vector4                       atlasRect(0.f, 0.f, 1.f, 1.f);
+  Dali::ImageDimensions         atlasRectSize(0, 0);
+  bool                          synchronousLoading(false);
+  bool                          atlasingStatus(false);
+  bool                          loadingStatus(false);
+  auto                          preMultiply         = TextureManager::MultiplyOnLoad::LOAD_WITHOUT_MULTIPLY;
+  ImageAtlasManagerPtr          atlasManager        = nullptr;
+  Toolkit::AtlasUploadObserver* atlasUploadObserver = nullptr;
+
+  uint32_t width(64);
+  uint32_t height(64);
+  uint32_t bufferSize = width * height * Pixel::GetBytesPerPixel(Pixel::RGBA8888);
+
+  uint8_t*  buffer    = reinterpret_cast<uint8_t*>(malloc(bufferSize));
+  PixelData pixelData = PixelData::New(buffer, bufferSize, width, height, Pixel::RGBA8888, PixelData::FREE);
+
+  DALI_TEST_CHECK(pixelData);
+
+  Dali::Toolkit::ImageUrl imageUrl = Dali::Toolkit::Image::GenerateUrl(pixelData, true);
+  std::string             url      = imageUrl.GetUrl();
+
+  TextureSet texture1 = textureManager.LoadTexture(
+    url,
+    ImageDimensions(),
+    FittingMode::SCALE_TO_FILL,
+    SamplingMode::BOX_THEN_LINEAR,
+    maskInfo,
+    synchronousLoading,
+    textureId1,
+    atlasRect,
+    atlasRectSize,
+    atlasingStatus,
+    loadingStatus,
+    &observer1,
+    atlasUploadObserver,
+    atlasManager,
+    true,
+    TextureManager::ReloadPolicy::CACHED,
+    preMultiply);
+
+  TextureSet texture2 = textureManager.LoadTexture(
+    url,
+    ImageDimensions(),
+    FittingMode::SCALE_TO_FILL,
+    SamplingMode::BOX_THEN_LINEAR,
+    maskInfo,
+    synchronousLoading,
+    textureId2,
+    atlasRect,
+    atlasRectSize,
+    atlasingStatus,
+    loadingStatus,
+    &observer2,
+    atlasUploadObserver,
+    atlasManager,
+    true,
+    TextureManager::ReloadPolicy::CACHED,
+    preMultiply);
+
+  DALI_TEST_EQUALS(observer1.mLoaded, false, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer1.mObserverCalled, false, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer2.mLoaded, false, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer2.mObserverCalled, false, TEST_LOCATION);
+
+  application.SendNotification();
+  application.Render();
+
+  DALI_TEST_EQUALS(Test::WaitForEventThreadTrigger(1), true, TEST_LOCATION);
+
+  DALI_TEST_EQUALS(observer1.mLoaded, true, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer1.mObserverCalled, true, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer1.mCompleteType, TestObserver::CompleteType::UPLOAD_COMPLETE, TEST_LOCATION);
+
+  DALI_TEST_EQUALS(observer2.mLoaded, true, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer2.mObserverCalled, true, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer2.mCompleteType, TestObserver::CompleteType::UPLOAD_COMPLETE, TEST_LOCATION);
+
+  DALI_TEST_EQUALS(textureId1 == textureId2, true, TEST_LOCATION);
+
+  texture1 = textureManager.LoadTexture(
+    url,
+    ImageDimensions(),
+    FittingMode::SCALE_TO_FILL,
+    SamplingMode::BOX_THEN_LINEAR,
+    maskInfo,
+    synchronousLoading,
+    textureId1,
+    atlasRect,
+    atlasRectSize,
+    atlasingStatus,
+    loadingStatus,
+    &observer1,
+    atlasUploadObserver,
+    atlasManager,
+    true,
+    TextureManager::ReloadPolicy::CACHED,
+    preMultiply);
+
+  texture2 = textureManager.LoadTexture(
+    url,
+    ImageDimensions(),
+    FittingMode::SCALE_TO_FILL,
+    SamplingMode::BOX_THEN_LINEAR,
+    maskInfo,
+    synchronousLoading,
+    textureId2,
+    atlasRect,
+    atlasRectSize,
+    atlasingStatus,
+    loadingStatus,
+    &observer2,
+    atlasUploadObserver,
+    atlasManager,
+    true,
+    TextureManager::ReloadPolicy::CACHED,
+    preMultiply);
+
+  application.SendNotification();
+  application.Render();
+
+  DALI_TEST_EQUALS(textureId1 == textureId2, true, TEST_LOCATION);
+  DALI_TEST_EQUALS(texture1 != texture2, true, TEST_LOCATION);
+
+  END_TEST;
+}
+
+int UtcTextureManagerRemoveExternalTextureAndLoadAgain(void)
+{
+  ToolkitTestApplication application;
+  tet_infoline("UtcTextureManagerRemoveExternalTextureAndLoadAgain check TextureManager RequestRemove and RemoveExternalTexture lifecycle works well");
+
+  auto  visualFactory  = Toolkit::VisualFactory::Get();
+  auto& textureManager = GetImplementation(visualFactory).GetTextureManager(); // Use VisualFactory's texture manager
+
+  TestObserver observer1;
+  TestObserver observer2;
+
+  auto                               textureId1(TextureManager::INVALID_TEXTURE_ID);
+  auto                               textureId2(TextureManager::INVALID_TEXTURE_ID);
+  TextureManager::MaskingDataPointer maskInfo = nullptr;
+
+  Vector4                       atlasRect(0.f, 0.f, 1.f, 1.f);
+  Dali::ImageDimensions         atlasRectSize(0, 0);
+  bool                          synchronousLoading(false);
+  bool                          atlasingStatus(false);
+  bool                          loadingStatus(false);
+  auto                          preMultiply         = TextureManager::MultiplyOnLoad::LOAD_WITHOUT_MULTIPLY;
+  ImageAtlasManagerPtr          atlasManager        = nullptr;
+  Toolkit::AtlasUploadObserver* atlasUploadObserver = nullptr;
+
+  uint32_t width(64);
+  uint32_t height(64);
+  uint32_t bufferSize = width * height * Pixel::GetBytesPerPixel(Pixel::RGBA8888);
+
+  uint8_t*  buffer    = reinterpret_cast<uint8_t*>(malloc(bufferSize));
+  PixelData pixelData = PixelData::New(buffer, bufferSize, width, height, Pixel::RGBA8888, PixelData::FREE);
+
+  DALI_TEST_CHECK(pixelData);
+
+  Dali::Toolkit::ImageUrl imageUrl = Dali::Toolkit::Image::GenerateUrl(pixelData, true);
+  std::string             url1     = imageUrl.GetUrl();
+  std::string             url2     = TEST_IMAGE_FILE_NAME;
+
+  // Step 1 : Load request for external url
+  TextureSet texture1 = textureManager.LoadTexture(
+    url1,
+    ImageDimensions(),
+    FittingMode::SCALE_TO_FILL,
+    SamplingMode::BOX_THEN_LINEAR,
+    maskInfo,
+    synchronousLoading,
+    textureId1,
+    atlasRect,
+    atlasRectSize,
+    atlasingStatus,
+    loadingStatus,
+    &observer1,
+    atlasUploadObserver,
+    atlasManager,
+    true,
+    TextureManager::ReloadPolicy::CACHED,
+    preMultiply);
+
+  DALI_TEST_CHECK(textureId1 != TextureManager::INVALID_TEXTURE_ID);
+
+  // Step 2 : Request remove for external url
+  textureManager.RequestRemove(textureId1, &observer1);
+
+  // Step 3 : Reduce imageUrl reference count.
+  imageUrl.Reset();
+
+  // Step 4 : Request new load by normal image.
+  TextureSet texture2 = textureManager.LoadTexture(
+    url2,
+    ImageDimensions(),
+    FittingMode::SCALE_TO_FILL,
+    SamplingMode::BOX_THEN_LINEAR,
+    maskInfo,
+    synchronousLoading,
+    textureId2,
+    atlasRect,
+    atlasRectSize,
+    atlasingStatus,
+    loadingStatus,
+    &observer2,
+    atlasUploadObserver,
+    atlasManager,
+    true,
+    TextureManager::ReloadPolicy::CACHED,
+    preMultiply);
+
+  DALI_TEST_CHECK(textureId2 != TextureManager::INVALID_TEXTURE_ID);
+
+  DALI_TEST_EQUALS(observer1.mLoaded, false, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer1.mObserverCalled, false, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer2.mLoaded, false, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer2.mObserverCalled, false, TEST_LOCATION);
+
+  application.SendNotification();
+  application.Render();
+
+  DALI_TEST_EQUALS(Test::WaitForEventThreadTrigger(1), true, TEST_LOCATION);
+
+  DALI_TEST_EQUALS(observer1.mLoaded, false, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer1.mObserverCalled, false, TEST_LOCATION);
+
+  DALI_TEST_EQUALS(observer2.mLoaded, true, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer2.mObserverCalled, true, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer2.mCompleteType, TestObserver::CompleteType::UPLOAD_COMPLETE, TEST_LOCATION);
+
+  END_TEST;
+}
+
 int UtcTextureManagerEncodedImageBufferReferenceCount(void)
 {
   ToolkitTestApplication application;
@@ -483,7 +803,6 @@ int UtcTextureManagerEncodedImageBufferReferenceCount(void)
     ImageDimensions(),
     FittingMode::SCALE_TO_FILL,
     SamplingMode::BOX_THEN_LINEAR,
-    TextureManager::UseAtlas::NO_ATLAS,
     &observer1,
     true, ///< orientationCorrection
     TextureManager::ReloadPolicy::CACHED,
@@ -562,7 +881,6 @@ int UtcTextureManagerCachingForDifferentLoadingType(void)
     ImageDimensions(),
     FittingMode::SCALE_TO_FILL,
     SamplingMode::BOX_THEN_LINEAR,
-    TextureManager::UseAtlas::NO_ATLAS,
     &observer1,
     true,
     TextureManager::ReloadPolicy::CACHED,
@@ -791,10 +1109,7 @@ int UtcTextureManagerUseInvalidMaskAndMaskLoadedLater(void)
   DALI_TEST_EQUALS(observer.mLoaded, false, TEST_LOCATION);
   DALI_TEST_EQUALS(observer.mObserverCalled, false, TEST_LOCATION);
 
-  application.SendNotification();
-  application.Render();
-
-  // CAPTION : HARD-CODING for coverage. If you are a good boy, Do not follow this code.
+  // CAPTION : HARD-CODING for coverage.
   {
     Dali::Devel::PixelBuffer pixelBuffer = textureManager.LoadPixelBuffer(
       filename,
@@ -811,8 +1126,8 @@ int UtcTextureManagerUseInvalidMaskAndMaskLoadedLater(void)
     textureManager.AsyncLoadComplete(textureId, pixelBuffers);
     std::vector<Devel::PixelBuffer> maskBuffers;
     textureManager.AsyncLoadComplete(maskInfo->mAlphaMaskId, maskBuffers);
-    textureManager.Remove(maskInfo->mAlphaMaskId, nullptr);
-    textureManager.Remove(textureId, &observer);
+    textureManager.RequestRemove(maskInfo->mAlphaMaskId, nullptr);
+    textureManager.RequestRemove(textureId, &observer);
   }
 
   application.SendNotification();
@@ -1131,7 +1446,6 @@ int UtcTextureManagerQueueRemoveDuringObserve(void)
     ImageDimensions(),
     FittingMode::SCALE_TO_FILL,
     SamplingMode::BOX_THEN_LINEAR,
-    TextureManager::UseAtlas::NO_ATLAS,
     &observer,
     true,
     TextureManager::ReloadPolicy::CACHED,
@@ -1232,22 +1546,18 @@ int UtcTextureManagerRemoveDuringApplyMasking(void)
   DALI_TEST_EQUALS(observer1.mObserverCalled, false, TEST_LOCATION);
 
   // Remove current textureId1. and request new texture again.
-  textureManager.Remove(textureId1, &observer1);
+  textureManager.RequestRemove(textureId1, &observer1);
   auto textureId2 = textureManager.RequestLoad(
     filename,
     ImageDimensions(),
     FittingMode::SCALE_TO_FILL,
     SamplingMode::BOX_THEN_LINEAR,
-    TextureManager::UseAtlas::NO_ATLAS,
     &observer2,
     true, ///< orientationCorrection
     TextureManager::ReloadPolicy::CACHED,
     preMultiply,
     synchronousLoading);
 
-  application.SendNotification();
-  application.Render();
-
   DALI_TEST_EQUALS(observer1.mLoaded, false, TEST_LOCATION);
   DALI_TEST_EQUALS(observer1.mObserverCalled, false, TEST_LOCATION);
   DALI_TEST_EQUALS(observer2.mLoaded, false, TEST_LOCATION);
@@ -1259,7 +1569,7 @@ int UtcTextureManagerRemoveDuringApplyMasking(void)
   {
     std::vector<Devel::PixelBuffer> pixelBuffers;
     textureManager.AsyncLoadComplete(textureId2, pixelBuffers);
-    textureManager.Remove(textureId2, &observer2);
+    textureManager.RequestRemove(textureId2, &observer2);
   }
 
   DALI_TEST_EQUALS(observer2.mLoaded, false, TEST_LOCATION); ///< Note that we call AsyncLoadComplete hardly with empty pixelbuffer.
@@ -1372,8 +1682,15 @@ int UtcTextureManagerMaskCacheTest(void)
   try
   {
     // Remove textureId1 first, and then remove textureId2. Check whether segfault occured.
-    textureManager.Remove(textureId1, &observer1);
-    textureManager.Remove(textureId2, &observer2);
+    textureManager.RequestRemove(textureId1, &observer1);
+
+    application.SendNotification();
+    application.Render();
+
+    textureManager.RequestRemove(textureId2, &observer2);
+
+    application.SendNotification();
+    application.Render();
 
     TestObserver observer3;
     maskInfo.reset(new TextureManager::MaskingData());
@@ -1437,10 +1754,10 @@ int UtcTextureManagerRemoveDuringGPUMasking(void)
 
   TextureManager textureManager; // Create new texture manager
 
-  TestObserverWithCustomFunction observer1;
-  TestObserverWithCustomFunction observer2;
-  TestObserver                   observer3;
-  TestObserver                   observer4;
+  TestObserverWithCustomFunction  observer1;
+  TestObserverWithCustomFunction  observer2;
+  TestObserverWithCustomFunction* observer3 = new TestObserverWithCustomFunction(); // Deleted in observer1 loaded signal
+  TestObserver                    observer4;
 
   std::string filename1(TEST_IMAGE_FILE_NAME);
   std::string filename2(TEST_IMAGE_2_FILE_NAME);
@@ -1523,7 +1840,7 @@ int UtcTextureManagerRemoveDuringGPUMasking(void)
     atlasRectSize,
     atlasingStatus,
     loadingStatus,
-    &observer3,
+    observer3,
     atlasUploadObserver,
     atlasManager,
     true,
@@ -1534,8 +1851,8 @@ int UtcTextureManagerRemoveDuringGPUMasking(void)
   DALI_TEST_EQUALS(observer1.mObserverCalled, false, TEST_LOCATION);
   DALI_TEST_EQUALS(observer2.mLoaded, false, TEST_LOCATION);
   DALI_TEST_EQUALS(observer2.mObserverCalled, false, TEST_LOCATION);
-  DALI_TEST_EQUALS(observer3.mLoaded, false, TEST_LOCATION);
-  DALI_TEST_EQUALS(observer3.mObserverCalled, false, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer3->mLoaded, false, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer3->mObserverCalled, false, TEST_LOCATION);
   DALI_TEST_EQUALS(observer4.mLoaded, false, TEST_LOCATION);
   DALI_TEST_EQUALS(observer4.mObserverCalled, false, TEST_LOCATION);
 
@@ -1554,7 +1871,7 @@ int UtcTextureManagerRemoveDuringGPUMasking(void)
   CustomData1 data1;
   data1.textureManagerPtr     = &textureManager;
   data1.removeTextureId       = textureId3;
-  data1.removeTextureObserver = &observer3;
+  data1.removeTextureObserver = observer3;
 
   observer1.mData = &data1;
   observer1.ConnectFunction(
@@ -1566,8 +1883,11 @@ int UtcTextureManagerRemoveDuringGPUMasking(void)
       DALI_TEST_CHECK(data1.removeTextureId != TextureManager::INVALID_TEXTURE_ID);
       DALI_TEST_CHECK(data1.removeTextureObserver);
 
-      // Remove textureId3
-      data1.textureManagerPtr->Remove(data1.removeTextureId, data1.removeTextureObserver);
+      // Remove textureId3.
+      data1.textureManagerPtr->RequestRemove(data1.removeTextureId, data1.removeTextureObserver);
+
+      // Destroy observer3
+      delete data1.removeTextureObserver;
     });
 
   // Connect observer2 custom function
@@ -1603,15 +1923,39 @@ int UtcTextureManagerRemoveDuringGPUMasking(void)
         ImageDimensions(),
         FittingMode::SCALE_TO_FILL,
         SamplingMode::BOX_THEN_LINEAR,
-        TextureManager::UseAtlas::NO_ATLAS,
         data2.addTextureObserver,
         true,
         TextureManager::ReloadPolicy::CACHED,
         preMultiply);
     });
 
-  application.SendNotification();
-  application.Render();
+  // Connect observer3 custom function
+  struct CustomData3
+  {
+    TestObserver* self{nullptr};
+    bool*         observerLoadedPtr{nullptr};
+    bool*         observerCalleddPtr{nullptr};
+  };
+  CustomData3 data3;
+  bool        observer3Loaded = false;
+  bool        observer3Called = false;
+  data3.self                  = observer3;
+  data3.observerLoadedPtr     = &observer3Loaded;
+  data3.observerCalleddPtr    = &observer3Called;
+
+  observer3->mData = &data3;
+  observer3->ConnectFunction(
+    [](void* data) {
+      DALI_TEST_CHECK(data);
+      CustomData3 data3 = *(CustomData3*)data;
+
+      DALI_TEST_CHECK(data3.self);
+      DALI_TEST_CHECK(data3.observerLoadedPtr);
+      DALI_TEST_CHECK(data3.observerCalleddPtr);
+
+      *data3.observerLoadedPtr  = data3.self->mLoaded;
+      *data3.observerCalleddPtr = data3.self->mObserverCalled;
+    });
 
   tet_printf("Id info - mask : {%d}, 1 : {%d}, 2 : {%d}, 3 : {%d}, 4 : {%d}\n", static_cast<int>(maskInfo[0]->mAlphaMaskId), static_cast<int>(textureId1), static_cast<int>(textureId2), static_cast<int>(textureId3), static_cast<int>(textureId4));
 
@@ -1630,12 +1974,14 @@ int UtcTextureManagerRemoveDuringGPUMasking(void)
     pixelBuffers.push_back(Devel::PixelBuffer::New(1, 1, Pixel::Format::RGB888));
     textureManager.AsyncLoadComplete(textureId3, pixelBuffers);
 
+    // Ensure textureId3 remove request processed.
+
     DALI_TEST_EQUALS(observer1.mLoaded, false, TEST_LOCATION);
     DALI_TEST_EQUALS(observer1.mObserverCalled, false, TEST_LOCATION);
     DALI_TEST_EQUALS(observer2.mLoaded, false, TEST_LOCATION);
     DALI_TEST_EQUALS(observer2.mObserverCalled, false, TEST_LOCATION);
-    DALI_TEST_EQUALS(observer3.mLoaded, false, TEST_LOCATION);
-    DALI_TEST_EQUALS(observer3.mObserverCalled, false, TEST_LOCATION);
+    DALI_TEST_EQUALS(observer3Loaded, false, TEST_LOCATION);
+    DALI_TEST_EQUALS(observer3Called, false, TEST_LOCATION);
     DALI_TEST_EQUALS(observer4.mLoaded, false, TEST_LOCATION);
     DALI_TEST_EQUALS(observer4.mObserverCalled, false, TEST_LOCATION);
 
@@ -1651,8 +1997,8 @@ int UtcTextureManagerRemoveDuringGPUMasking(void)
     DALI_TEST_EQUALS(observer1.mObserverCalled, true, TEST_LOCATION);
     DALI_TEST_EQUALS(observer2.mLoaded, true, TEST_LOCATION);
     DALI_TEST_EQUALS(observer2.mObserverCalled, true, TEST_LOCATION);
-    DALI_TEST_EQUALS(observer3.mLoaded, false, TEST_LOCATION);
-    DALI_TEST_EQUALS(observer3.mObserverCalled, false, TEST_LOCATION);
+    DALI_TEST_EQUALS(observer3Loaded, false, TEST_LOCATION);
+    DALI_TEST_EQUALS(observer3Called, false, TEST_LOCATION);
     DALI_TEST_EQUALS(observer4.mLoaded, false, TEST_LOCATION);
     DALI_TEST_EQUALS(observer4.mObserverCalled, false, TEST_LOCATION);
 
@@ -1668,11 +2014,402 @@ int UtcTextureManagerRemoveDuringGPUMasking(void)
     DALI_TEST_EQUALS(observer1.mObserverCalled, true, TEST_LOCATION);
     DALI_TEST_EQUALS(observer2.mLoaded, true, TEST_LOCATION);
     DALI_TEST_EQUALS(observer2.mObserverCalled, true, TEST_LOCATION);
-    DALI_TEST_EQUALS(observer3.mLoaded, false, TEST_LOCATION);
-    DALI_TEST_EQUALS(observer3.mObserverCalled, false, TEST_LOCATION);
+    DALI_TEST_EQUALS(observer3Loaded, false, TEST_LOCATION);
+    DALI_TEST_EQUALS(observer3Called, false, TEST_LOCATION);
     DALI_TEST_EQUALS(observer4.mLoaded, true, TEST_LOCATION);
     DALI_TEST_EQUALS(observer4.mObserverCalled, true, TEST_LOCATION);
   }
 
   END_TEST;
-}
\ No newline at end of file
+}
+
+int UtcTextureManagerDestroyObserverDuringObserve(void)
+{
+  ToolkitTestApplication application;
+  tet_infoline("UtcTextureManagerDestroyObserverDuringObserve");
+  tet_infoline("Request 3 different image.");
+  tet_infoline("Complete textureId1. After observer1 loaded done,");
+  tet_infoline(" - Remove and destroy observer2");
+  tet_infoline(" - Re-generate observer2 which has same address pointer with before.");
+  tet_infoline(" - Remove and Reqeust third file by observer3");
+  tet_infoline("Complete textureId2. and check old observer2 not emmited, and newly observer2 works.");
+  tet_infoline("Complete textureId3. and check observer3 comes");
+
+  TextureManager textureManager; // Create new texture manager
+
+  TestObserverWithCustomFunction  observer1;
+  TestObserverWithCustomFunction* observer2 = new TestObserverWithCustomFunction(); // Deleted in observer1 loaded signal.
+  TestObserver                    observer3;
+
+  std::string filename1(TEST_IMAGE_FILE_NAME);
+  std::string filename2(TEST_IMAGE_2_FILE_NAME);
+  std::string filename3(TEST_IMAGE_3_FILE_NAME);
+  std::string filename4(TEST_IMAGE_4_FILE_NAME);
+
+  auto textureId1(TextureManager::INVALID_TEXTURE_ID);
+  auto textureId2(TextureManager::INVALID_TEXTURE_ID);
+  auto textureId3(TextureManager::INVALID_TEXTURE_ID);
+  auto textureId4(TextureManager::INVALID_TEXTURE_ID);
+
+  // Dummy reference value
+  auto preMultiply = TextureManager::MultiplyOnLoad::LOAD_WITHOUT_MULTIPLY;
+
+  // Request image 1, 2, 3.
+  textureId1 = textureManager.RequestLoad(
+    filename1,
+    ImageDimensions(),
+    FittingMode::SCALE_TO_FILL,
+    SamplingMode::BOX_THEN_LINEAR,
+    &observer1,
+    true,
+    TextureManager::ReloadPolicy::CACHED,
+    preMultiply);
+
+  textureId2 = textureManager.RequestLoad(
+    filename2,
+    ImageDimensions(),
+    FittingMode::SCALE_TO_FILL,
+    SamplingMode::BOX_THEN_LINEAR,
+    observer2,
+    true,
+    TextureManager::ReloadPolicy::CACHED,
+    preMultiply);
+
+  textureId3 = textureManager.RequestLoad(
+    filename3,
+    ImageDimensions(),
+    FittingMode::SCALE_TO_FILL,
+    SamplingMode::BOX_THEN_LINEAR,
+    &observer3,
+    true,
+    TextureManager::ReloadPolicy::CACHED,
+    preMultiply);
+
+  struct CustomData1
+  {
+    TextureManager*                  textureManagerPtr{nullptr};
+    TextureManager::TextureId        removeTextureId{TextureManager::INVALID_TEXTURE_ID};
+    TestObserverWithCustomFunction** removeTextureObserver{nullptr};
+    std::string                      resendFilename{};
+    TextureManager::TextureId        resendTextureId{TextureManager::INVALID_TEXTURE_ID};
+    TestObserver*                    resendTextureObserver{nullptr};
+    std::string                      newlyFilename{};
+    TextureManager::TextureId*       newlyTextureIdPtr{nullptr};
+  };
+  struct CustomData2
+  {
+    TextureManager* textureManagerPtr{nullptr};
+    TestObserver*   self{nullptr};
+    bool*           observerLoadedPtr{nullptr};
+    bool*           observerCalledPtr{nullptr};
+  };
+
+  bool        observer2Loaded    = false;
+  bool        observer2Called    = false;
+  bool        newObserver2Loaded = false;
+  bool        newObserver2Called = false;
+  CustomData2 newData2; // Used on observer1 function
+
+  // Connect observer1 custom function
+  CustomData1 data1;
+  data1.textureManagerPtr     = &textureManager;
+  data1.removeTextureId       = textureId2;
+  data1.removeTextureObserver = &observer2;
+  data1.resendFilename        = filename3;
+  data1.resendTextureId       = textureId3;
+  data1.resendTextureObserver = &observer3;
+  data1.newlyFilename         = filename2; // Same as observer2 filename
+  data1.newlyTextureIdPtr     = &textureId4;
+
+  observer1.mData = &data1;
+  observer1.ConnectFunction(
+    [&](void* data) {
+      DALI_TEST_CHECK(data);
+      CustomData1 data1 = *(CustomData1*)data;
+
+      DALI_TEST_CHECK(data1.textureManagerPtr);
+      DALI_TEST_CHECK(data1.removeTextureId != TextureManager::INVALID_TEXTURE_ID);
+      DALI_TEST_CHECK(data1.removeTextureObserver);
+      DALI_TEST_CHECK(*data1.removeTextureObserver);
+      DALI_TEST_CHECK(!data1.resendFilename.empty());
+      DALI_TEST_CHECK(data1.resendTextureId != TextureManager::INVALID_TEXTURE_ID);
+      DALI_TEST_CHECK(data1.resendTextureObserver);
+      DALI_TEST_CHECK(!data1.newlyFilename.empty());
+      DALI_TEST_CHECK(data1.newlyTextureIdPtr);
+      DALI_TEST_CHECK(*data1.newlyTextureIdPtr == TextureManager::INVALID_TEXTURE_ID);
+
+      // Remove textureId2.
+      data1.textureManagerPtr->RequestRemove(data1.removeTextureId, *data1.removeTextureObserver);
+
+      auto removedObserver = *data1.removeTextureObserver;
+
+      // Destroy observer2.
+      delete removedObserver;
+
+      // Create new observer. Make we use same pointer if we can.
+      uint32_t maxTryCount = 100u;
+      uint32_t tryCount    = 0u;
+
+      while(tryCount < maxTryCount)
+      {
+        *data1.removeTextureObserver = new TestObserverWithCustomFunction();
+        if(removedObserver == *data1.removeTextureObserver) break;
+        ++tryCount;
+        delete *data1.removeTextureObserver;
+      }
+
+      tet_printf("TryCount[%u] / Old observer2 : %p, newly observer2 : %p\n", tryCount, removedObserver, *data1.removeTextureObserver);
+
+      // Connect new observer2 custom function
+      newData2.textureManagerPtr = &textureManager;
+      newData2.self              = (*data1.removeTextureObserver);
+      newData2.observerLoadedPtr = &newObserver2Loaded;
+      newData2.observerCalledPtr = &newObserver2Called;
+
+      (*data1.removeTextureObserver)->mData = &newData2;
+      (*data1.removeTextureObserver)->ConnectFunction([](void* data) {
+        DALI_TEST_CHECK(data);
+        CustomData2 data2 = *(CustomData2*)data;
+
+        tet_printf("New created observer running\n");
+
+        DALI_TEST_CHECK(data2.self);
+        DALI_TEST_CHECK(data2.observerLoadedPtr);
+        DALI_TEST_CHECK(data2.observerCalledPtr);
+
+        *data2.observerLoadedPtr = data2.self->mLoaded;
+        *data2.observerCalledPtr = data2.self->mObserverCalled;
+      });
+
+      // Dummy reference value
+      auto preMultiply = TextureManager::MultiplyOnLoad::LOAD_WITHOUT_MULTIPLY;
+
+      // Resend textureId3
+      data1.textureManagerPtr->RequestRemove(data1.resendTextureId, data1.resendTextureObserver);
+
+      TextureManager::TextureId tempId;
+      tempId = data1.textureManagerPtr->RequestLoad(
+        data1.resendFilename,
+        ImageDimensions(),
+        FittingMode::SCALE_TO_FILL,
+        SamplingMode::BOX_THEN_LINEAR,
+        data1.resendTextureObserver,
+        true,
+        TextureManager::ReloadPolicy::CACHED,
+        preMultiply);
+
+      DALI_TEST_CHECK(tempId == data1.resendTextureId);
+
+      // Request new task
+
+      tempId = data1.textureManagerPtr->RequestLoad(
+        data1.newlyFilename,
+        ImageDimensions(),
+        FittingMode::SCALE_TO_FILL,
+        SamplingMode::BOX_THEN_LINEAR,
+        *data1.removeTextureObserver,
+        true,
+        TextureManager::ReloadPolicy::CACHED,
+        preMultiply);
+
+      DALI_TEST_CHECK(tempId != TextureManager::INVALID_TEXTURE_ID);
+      *data1.newlyTextureIdPtr = tempId;
+    });
+
+  // Connect observer2 custom function
+  CustomData2 data2;
+  data2.textureManagerPtr = &textureManager;
+  data2.self              = observer2;
+  data2.observerLoadedPtr = &observer2Loaded;
+  data2.observerCalledPtr = &observer2Called;
+
+  observer2->mData = &data2;
+  observer2->ConnectFunction(
+    [](void* data) {
+      DALI_TEST_CHECK(data);
+      CustomData2 data2 = *(CustomData2*)data;
+
+      tet_printf("Old created observer running. Something error occured!\n");
+
+      DALI_TEST_CHECK(data2.self);
+      DALI_TEST_CHECK(data2.observerLoadedPtr);
+      DALI_TEST_CHECK(data2.observerCalledPtr);
+
+      *data2.observerLoadedPtr = data2.self->mLoaded;
+      *data2.observerCalledPtr = data2.self->mObserverCalled;
+    });
+
+  tet_printf("Id info - 1 : {%d}, 2 : {%d}, 3 : {%d}, 4 : {%d}\n", static_cast<int>(textureId1), static_cast<int>(textureId2), static_cast<int>(textureId3), static_cast<int>(textureId4));
+
+  DALI_TEST_EQUALS(observer1.mLoaded, false, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer1.mObserverCalled, false, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer2Loaded, false, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer2Called, false, TEST_LOCATION);
+  DALI_TEST_EQUALS(newObserver2Loaded, false, TEST_LOCATION);
+  DALI_TEST_EQUALS(newObserver2Called, false, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer3.mLoaded, false, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer3.mObserverCalled, false, TEST_LOCATION);
+
+  DALI_TEST_CHECK(textureId4 == TextureManager::INVALID_TEXTURE_ID);
+
+  // CAPTION : HARD-CODING.
+  // Run codes without exception.
+  try
+  {
+    tet_printf("Complete async load 1 first.\n");
+    std::vector<Devel::PixelBuffer> pixelBuffers;
+
+    pixelBuffers.clear();
+    pixelBuffers.push_back(Devel::PixelBuffer::New(1, 1, Pixel::Format::RGB888));
+    textureManager.AsyncLoadComplete(textureId1, pixelBuffers);
+
+    tet_printf("Now observer2 deleted, observer3 resended, observer2 re-created.\n");
+    DALI_TEST_EQUALS(observer1.mLoaded, true, TEST_LOCATION);
+    DALI_TEST_EQUALS(observer1.mObserverCalled, true, TEST_LOCATION);
+    DALI_TEST_EQUALS(observer2Loaded, false, TEST_LOCATION);
+    DALI_TEST_EQUALS(observer2Called, false, TEST_LOCATION);
+    DALI_TEST_EQUALS(newObserver2Loaded, false, TEST_LOCATION);
+    DALI_TEST_EQUALS(newObserver2Called, false, TEST_LOCATION);
+    DALI_TEST_EQUALS(observer3.mLoaded, false, TEST_LOCATION);
+    DALI_TEST_EQUALS(observer3.mObserverCalled, false, TEST_LOCATION);
+
+    tet_printf("Id info - 1 : {%d}, 2 : {%d}, 3 : {%d}, 4 : {%d}\n", static_cast<int>(textureId1), static_cast<int>(textureId2), static_cast<int>(textureId3), static_cast<int>(textureId4));
+
+    DALI_TEST_CHECK(textureId4 == textureId2);
+
+    // Remove processor excute.
+    application.SendNotification();
+    application.Render();
+
+    tet_printf("Complete async load 2. Let we check old version observer2 ignored and newly observer2 loaded.\n");
+    pixelBuffers.clear();
+    pixelBuffers.push_back(Devel::PixelBuffer::New(1, 1, Pixel::Format::RGB888));
+    textureManager.AsyncLoadComplete(textureId2, pixelBuffers);
+
+    DALI_TEST_EQUALS(observer1.mLoaded, true, TEST_LOCATION);
+    DALI_TEST_EQUALS(observer1.mObserverCalled, true, TEST_LOCATION);
+    DALI_TEST_EQUALS(observer2Loaded, false, TEST_LOCATION);
+    DALI_TEST_EQUALS(observer2Called, false, TEST_LOCATION);
+    DALI_TEST_EQUALS(newObserver2Loaded, true, TEST_LOCATION);
+    DALI_TEST_EQUALS(newObserver2Called, true, TEST_LOCATION);
+    // We don't check observer3 not loaded case because SendNotification can process AsyncTask.
+    //DALI_TEST_EQUALS(observer3.mLoaded, false, TEST_LOCATION);
+    //DALI_TEST_EQUALS(observer3.mObserverCalled, false, TEST_LOCATION);
+
+    tet_printf("Complete async load 3.\n");
+    pixelBuffers.clear();
+    pixelBuffers.push_back(Devel::PixelBuffer::New(1, 1, Pixel::Format::RGB888));
+    textureManager.AsyncLoadComplete(textureId3, pixelBuffers);
+
+    DALI_TEST_EQUALS(observer1.mLoaded, true, TEST_LOCATION);
+    DALI_TEST_EQUALS(observer1.mObserverCalled, true, TEST_LOCATION);
+    DALI_TEST_EQUALS(observer2Loaded, false, TEST_LOCATION);
+    DALI_TEST_EQUALS(observer2Called, false, TEST_LOCATION);
+    DALI_TEST_EQUALS(newObserver2Loaded, true, TEST_LOCATION);
+    DALI_TEST_EQUALS(newObserver2Called, true, TEST_LOCATION);
+    DALI_TEST_EQUALS(observer3.mLoaded, true, TEST_LOCATION);
+    DALI_TEST_EQUALS(observer3.mObserverCalled, true, TEST_LOCATION);
+  }
+  catch(...)
+  {
+    DALI_TEST_CHECK(false);
+  }
+
+  END_TEST;
+}
+
+int UtcTextureManagerCachingForDifferentMultiplyOnLoad(void)
+{
+  /// To insture the order of callback, Make we don't use mutiple thread loading for this UTC.
+  EnvironmentVariable::SetTestEnvironmentVariable("DALI_ASYNC_MANAGER_THREAD_POOL_SIZE", "1");
+  EnvironmentVariable::SetTestEnvironmentVariable("DALI_ASYNC_MANAGER_LOW_PRIORITY_THREAD_POOL_SIZE", "1");
+
+  ToolkitTestApplication application;
+  tet_infoline("UtcTextureManagerCachingForDifferentMultiplyOnLoad");
+  tet_infoline("Observe1 multiply on load, and Observer2, 3 don't multiply on load.");
+  tet_infoline("We will use jpg image, with will not premultiply alpha even if we try to load without multiply.");
+
+  tet_infoline("Let we request Observer1 and Observer2 sequencely.");
+  tet_infoline("After Observer1 complete, we will cache -premultiplyOnLoad = true, premultiplied = false;");
+  tet_infoline("Before Observer2 complete, let we request Observer3. It will cache-hit with Observer1 item (since image is not premultiplied.)");
+  tet_infoline("At this time, Observer1 and Observer3 loaded, but Observer2 still not.");
+
+  TextureManager textureManager; // Create new texture manager
+
+  TestObserver observer1;
+  TestObserver observer2;
+  TestObserver observer3;
+  std::string  filename(TEST_IMAGE_FILE_NAME);
+  auto         preMultiply = TextureManager::MultiplyOnLoad::MULTIPLY_ON_LOAD;
+  textureManager.RequestLoad(
+    filename,
+    ImageDimensions(),
+    FittingMode::SCALE_TO_FILL,
+    SamplingMode::BOX_THEN_LINEAR,
+    &observer1,
+    true,
+    TextureManager::ReloadPolicy::CACHED,
+    preMultiply);
+
+  DALI_TEST_EQUALS(observer1.mLoaded, false, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer1.mObserverCalled, false, TEST_LOCATION);
+
+  preMultiply = TextureManager::MultiplyOnLoad::LOAD_WITHOUT_MULTIPLY;
+  textureManager.RequestLoad(
+    filename,
+    ImageDimensions(),
+    FittingMode::SCALE_TO_FILL,
+    SamplingMode::BOX_THEN_LINEAR,
+    &observer2,
+    true,
+    TextureManager::ReloadPolicy::CACHED,
+    preMultiply);
+
+  DALI_TEST_EQUALS(observer2.mLoaded, false, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer2.mObserverCalled, false, TEST_LOCATION);
+
+  DALI_TEST_EQUALS(Test::WaitForEventThreadTrigger(1), true, TEST_LOCATION);
+
+  tet_printf("We can ensure that observer1 loaded first. (since the number of thread pool is 1)\n");
+  DALI_TEST_EQUALS(observer1.mLoaded, true, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer1.mObserverCalled, true, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer2.mLoaded, false, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer2.mObserverCalled, false, TEST_LOCATION);
+
+  preMultiply = TextureManager::MultiplyOnLoad::LOAD_WITHOUT_MULTIPLY;
+  textureManager.RequestLoad(
+    filename,
+    ImageDimensions(),
+    FittingMode::SCALE_TO_FILL,
+    SamplingMode::BOX_THEN_LINEAR,
+    &observer3,
+    true,
+    TextureManager::ReloadPolicy::CACHED,
+    preMultiply);
+
+  tet_printf("Request Observer3. It will cache-hit with Observer1.\n");
+  DALI_TEST_EQUALS(observer1.mLoaded, true, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer1.mObserverCalled, true, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer1.mCompleteType, TestObserver::CompleteType::UPLOAD_COMPLETE, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer2.mLoaded, false, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer2.mObserverCalled, false, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer3.mLoaded, true, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer3.mObserverCalled, true, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer3.mCompleteType, TestObserver::CompleteType::UPLOAD_COMPLETE, TEST_LOCATION);
+
+  application.SendNotification();
+  application.Render();
+
+  DALI_TEST_EQUALS(Test::WaitForEventThreadTrigger(1), true, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer1.mLoaded, true, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer1.mObserverCalled, true, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer1.mCompleteType, TestObserver::CompleteType::UPLOAD_COMPLETE, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer2.mLoaded, true, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer2.mObserverCalled, true, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer2.mCompleteType, TestObserver::CompleteType::UPLOAD_COMPLETE, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer3.mLoaded, true, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer3.mObserverCalled, true, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer3.mCompleteType, TestObserver::CompleteType::UPLOAD_COMPLETE, TEST_LOCATION);
+
+  END_TEST;
+}