wire up reduced atlas and zero textblob cache to test

tests/TextBlobCacheTest.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "sk_tool_utils.h"
+
 #include "SkCanvas.h"
 #include "SkPaint.h"
 #include "SkPoint.h"
 #include "SkTextBlob.h"
 #include "SkFontMgr.h"
 #include "SkGraphics.h"
 #include "SkSurface.h"
 #include "SkTypeface.h"
 #include "../src/fonts/SkRandomScalerContext.h"
 
 #ifdef SK_BUILD_FOR_WIN
     #include "SkTypeface_win.h"
 #endif
 
 #include "Test.h"
 
 #if SK_SUPPORT_GPU
 #include "GrContextFactory.h"
+#include "GrTest.h"
 
 struct TextBlobWrapper {
     // This class assumes it 'owns' the textblob it wraps, and thus does not need to take a ref
     explicit TextBlobWrapper(const SkTextBlob* blob) : fBlob(blob) {}
     TextBlobWrapper(const TextBlobWrapper& blob) : fBlob(SkRef(blob.fBlob.get())) {}
 
     SkAutoTUnref<const SkTextBlob> fBlob;
 };
 
 static void draw(SkCanvas* canvas, int redraw, const SkTArray<TextBlobWrapper>& blobs) {
     int yOffset = 0;
     for (int r = 0; r < redraw; r++) {
         for (int i = 0; i < blobs.count(); i++) {
             const SkTextBlob* blob = blobs[i].fBlob.get();
             const SkRect& bounds = blob->bounds();
             yOffset += SkScalarCeilToInt(bounds.height());
             SkPaint paint;
             canvas->drawTextBlob(blob, 0, SkIntToScalar(yOffset), paint);
         }
     }
 }
 
 static const int kWidth = 1024;
 static const int kHeight = 768;
 
 // This test hammers the GPU textblobcache and font atlas
 static void text_blob_cache_inner(skiatest::Reporter* reporter, GrContextFactory* factory,
-                                  int maxTotalText, int maxGlyphID, int maxFamilies, bool normal) {
+                                  int maxTotalText, int maxGlyphID, int maxFamilies, bool normal,
+                                  bool stressTest) {
     // setup surface
     uint32_t flags = 0;
     SkSurfaceProps props(flags, SkSurfaceProps::kLegacyFontHost_InitType);
 
     // We don't typically actually draw with this unittest
     GrContext* ctx = factory->get(GrContextFactory::kNull_GLContextType);
+
+    // configure our context for maximum stressing of cache and atlas
+    if (stressTest) {
+        GrTest::SetupAlwaysEvictAtlas(ctx);
+        ctx->setTextBlobCacheLimit_ForTesting(0);
+    }
+
     SkImageInfo info = SkImageInfo::Make(kWidth, kHeight, kN32_SkColorType, kPremul_SkAlphaType);
     SkAutoTUnref<SkSurface> surface(SkSurface::NewRenderTarget(ctx, SkSurface::kNo_Budgeted, info,
                                                                0, &props));
     REPORTER_ASSERT(reporter, surface);
     if (!surface) {
         return;
     }
 
     SkCanvas* canvas = surface->getCanvas();
 
@@ skipping 73 matching lines @@
 
     ctx->freeGpuResources();
     draw(canvasNoLCD, 1, blobs);
 
     // test draw after abandon
     ctx->abandonContext();
     draw(canvas, 1, blobs);
 }
 
 DEF_GPUTEST(TextBlobCache, reporter, factory) {
-    text_blob_cache_inner(reporter, factory, 4096, 256, 30, true);
+    text_blob_cache_inner(reporter, factory, 1024, 256, 30, true, false);
+}
+
+DEF_GPUTEST(TextBlobStressCache, reporter, factory) {
+    text_blob_cache_inner(reporter, factory, 256, 256, 10, true, true);
 }
 
 DEF_GPUTEST(TextBlobAbnormal, reporter, factory) {
-#ifdef SK_BUILD_FOR_ANDROID
-    text_blob_cache_inner(reporter, factory, 256, 256, 30, false);
-#else
-    text_blob_cache_inner(reporter, factory, 512, 256, 30, false);
-#endif
+    text_blob_cache_inner(reporter, factory, 256, 256, 10, false, false);
+}
+
+DEF_GPUTEST(TextBlobStressAbnormal, reporter, factory) {
+    text_blob_cache_inner(reporter, factory, 256, 256, 10, false, true);
 }
 #endif