commit 756f2702cb642b52ef5ada4a0ac267b423f28146
author Lei Zhang <thestig@chromium.org> Mon Jul 11 17:33:15 2022 +0000
committer Pdfium LUCI CQ <pdfium-scoped@luci-project-accounts.iam.gserviceaccount.com> Mon Jul 11 17:33:15 2022 +0000
tree 1070ce8997e0ba25bd5309695b2e8124b9331dfe
parent ed3e7ed631d1e50c7abe83c347144c36c50b46a2

Add basic unit tests for CFDE_TextOut.

Give the class a little bit of test coverage.

Change-Id: I4cf6c0663388aa3bcc37becd37739f66c340df5a
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/95053
Reviewed-by: Nigi <nigi@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>

xfa/fde/BUILD.gn

diff --git a/xfa/fde/BUILD.gn b/xfa/fde/BUILD.gn
index 2c754d1..043dd2c 100644
--- a/xfa/fde/BUILD.gn
+++ b/xfa/fde/BUILD.gn
@@ -32,9 +32,13 @@
 }
 
 pdfium_unittest_source_set("unittests") {
-  sources = [ "cfde_texteditengine_unittest.cpp" ]
+  sources = [
+    "cfde_texteditengine_unittest.cpp",
+    "cfde_textout_unittest.cpp",
+  ]
   deps = [
     ":fde",
+    "../../core/fdrm",
     "../../core/fxge",
     "../fgas/font",
   ]

xfa/fde/cfde_textout_unittest.cpp

diff --git a/xfa/fde/cfde_textout_unittest.cpp b/xfa/fde/cfde_textout_unittest.cpp
new file mode 100644
index 0000000..46f128d
--- /dev/null
+++ b/xfa/fde/cfde_textout_unittest.cpp
@@ -0,0 +1,79 @@
+// Copyright 2022 PDFium 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 "xfa/fde/cfde_textout.h"
+
+#include <memory>
+
+#include "core/fdrm/fx_crypt.h"
+#include "core/fxcrt/bytestring.h"
+#include "core/fxcrt/fx_codepage.h"
+#include "core/fxcrt/retain_ptr.h"
+#include "core/fxge/cfx_defaultrenderdevice.h"
+#include "core/fxge/dib/cfx_dibitmap.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "testing/utils/hash.h"
+#include "xfa/fgas/font/cfgas_gefont.h"
+
+namespace {
+
+const char kEmptyImageChecksum[] = "a042237c5493fdb9656b94a83608d11a";
+
+}  // namespace
+
+class CFDETextOutTest : public testing::Test {
+ public:
+  void SetUp() override {
+    bitmap_ = pdfium::MakeRetain<CFX_DIBitmap>();
+    ASSERT_TRUE(bitmap_->Create(200, 100, FXDIB_Format::kArgb));
+
+    device_ = std::make_unique<CFX_DefaultRenderDevice>();
+    device_->Attach(bitmap_);
+
+    const wchar_t kFontFamily[] = L"Arimo Bold";
+    font_ = CFGAS_GEFont::LoadFont(kFontFamily, 0, FX_CodePage::kDefANSI);
+    ASSERT_TRUE(font_);
+
+    text_out_ = std::make_unique<CFDE_TextOut>();
+    text_out_->SetFont(font_);
+    text_out_->SetFontSize(12.0f);
+
+    EXPECT_STREQ(kEmptyImageChecksum, GetBitmapChecksum().c_str());
+  }
+
+  void TearDown() override {
+    text_out_.reset();
+    font_.Reset();
+    device_.reset();
+    bitmap_.Reset();
+  }
+
+  CFX_DefaultRenderDevice* device() { return device_.get(); }
+  CFDE_TextOut& text_out() { return *text_out_; }
+
+  ByteString GetBitmapChecksum() {
+    CRYPT_md5_context context = CRYPT_MD5Start();
+    for (int i = 0; i < bitmap_->GetHeight(); ++i)
+      CRYPT_MD5Update(&context, bitmap_->GetScanline(i));
+    uint8_t digest[16];
+    CRYPT_MD5Finish(&context, digest);
+    return ByteString(CryptToBase16(digest).c_str());
+  }
+
+ private:
+  RetainPtr<CFX_DIBitmap> bitmap_;
+  std::unique_ptr<CFX_DefaultRenderDevice> device_;
+  RetainPtr<CFGAS_GEFont> font_;
+  std::unique_ptr<CFDE_TextOut> text_out_;
+};
+
+TEST_F(CFDETextOutTest, DrawLogicTextBasic) {
+  text_out().DrawLogicText(device(), L"foo", CFX_RectF(0, 0, 200, 100));
+  EXPECT_STREQ("b26f1c171fcdbf185823364185adacf0", GetBitmapChecksum().c_str());
+}
+
+TEST_F(CFDETextOutTest, DrawLogicTextEmptyRect) {
+  text_out().DrawLogicText(device(), L"foo", CFX_RectF());
+  EXPECT_STREQ(kEmptyImageChecksum, GetBitmapChecksum().c_str());
+}