Start CSS parser unit tests

Start adding unit tests for the css parser. Fixup memory
leaks that are exposed by the tests.

Change-Id: Id863d9cd5f13ab82626bc7b945de925253c88d43
Reviewed-on: https://pdfium-review.googlesource.com/2180
Reviewed-by: Nicolás Peña <npm@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: dsinclair <dsinclair@chromium.org>

1 files changed, 112 insertions, 0 deletions

diff --git a/xfa/fde/css/cfde_cssstylesheet_unittest.cpp b/xfa/fde/css/cfde_cssstylesheet_unittest.cpp
new file mode 100644
index 0000000000..1edc4b5f51
--- /dev/null
+++ b/xfa/fde/css/cfde_cssstylesheet_unittest.cpp
@@ -0,0 +1,112 @@
+// Copyright 2017 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.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#include "xfa/fde/css/fde_cssstylesheet.h"
+
+#include <memory>
+
+#include "testing/gtest/include/gtest/gtest.h"
+#include "third_party/base/ptr_util.h"
+
+class CFDE_CSSStyleSheetTest : public testing::Test {
+ public:
+  void SetUp() override {
+    sheet_ = pdfium::MakeUnique<CFDE_CSSStyleSheet>();
+    decl_ = nullptr;
+  }
+
+  void TearDown() override { decl_ = nullptr; }
+
+  void LoadAndVerifyDecl(const FX_WCHAR* buf, size_t decl_count) {
+    ASSERT(sheet_);
+
+    EXPECT_TRUE(sheet_->LoadFromBuffer(buf, FXSYS_wcslen(buf)));
+    EXPECT_EQ(1, sheet_->CountRules());
+
+    CFDE_CSSRule* rule = sheet_->GetRule(0);
+    EXPECT_EQ(FDE_CSSRuleType::Style, rule->GetType());
+
+    CFDE_CSSStyleRule* style = static_cast<CFDE_CSSStyleRule*>(rule);
+    decl_ = style->GetDeclaration();
+    EXPECT_EQ(decl_count, decl_->PropertyCountForTesting());
+  }
+
+  void VerifyFloat(FDE_CSSProperty prop, float val, FDE_CSSPrimitiveType type) {
+    ASSERT(decl_);
+
+    bool important;
+    CFDE_CSSValue* v = decl_->GetProperty(prop, important);
+    CFDE_CSSPrimitiveValue* pval = static_cast<CFDE_CSSPrimitiveValue*>(v);
+    EXPECT_EQ(type, pval->GetPrimitiveType());
+    EXPECT_EQ(val, pval->GetFloat());
+  }
+
+  void VerifyEnum(FDE_CSSProperty prop, FDE_CSSPropertyValue val) {
+    ASSERT(decl_);
+
+    bool important;
+    CFDE_CSSValue* v = decl_->GetProperty(prop, important);
+    CFDE_CSSPrimitiveValue* pval = static_cast<CFDE_CSSPrimitiveValue*>(v);
+    EXPECT_EQ(FDE_CSSPrimitiveType::Enum, pval->GetPrimitiveType());
+    EXPECT_EQ(val, pval->GetEnum());
+  }
+
+  std::unique_ptr<CFDE_CSSStyleSheet> sheet_;
+  CFDE_CSSDeclaration* decl_;
+};
+
+TEST_F(CFDE_CSSStyleSheetTest, ParseBorder) {
+  LoadAndVerifyDecl(L"a { border: 5px; }", 4);
+  VerifyFloat(FDE_CSSProperty::BorderLeftWidth, 5.0,
+              FDE_CSSPrimitiveType::Pixels);
+  VerifyFloat(FDE_CSSProperty::BorderRightWidth, 5.0,
+              FDE_CSSPrimitiveType::Pixels);
+  VerifyFloat(FDE_CSSProperty::BorderTopWidth, 5.0,
+              FDE_CSSPrimitiveType::Pixels);
+  VerifyFloat(FDE_CSSProperty::BorderBottomWidth, 5.0,
+              FDE_CSSPrimitiveType::Pixels);
+}
+
+TEST_F(CFDE_CSSStyleSheetTest, ParseBorderFull) {
+  LoadAndVerifyDecl(L"a { border: 5px solid red; }", 4);
+  VerifyFloat(FDE_CSSProperty::BorderLeftWidth, 5.0,
+              FDE_CSSPrimitiveType::Pixels);
+  VerifyFloat(FDE_CSSProperty::BorderRightWidth, 5.0,
+              FDE_CSSPrimitiveType::Pixels);
+  VerifyFloat(FDE_CSSProperty::BorderTopWidth, 5.0,
+              FDE_CSSPrimitiveType::Pixels);
+  VerifyFloat(FDE_CSSProperty::BorderBottomWidth, 5.0,
+              FDE_CSSPrimitiveType::Pixels);
+}
+
+TEST_F(CFDE_CSSStyleSheetTest, ParseBorderLeft) {
+  LoadAndVerifyDecl(L"a { border-left: 2.5pc; }", 1);
+  VerifyFloat(FDE_CSSProperty::BorderLeftWidth, 2.5,
+              FDE_CSSPrimitiveType::Picas);
+}
+
+TEST_F(CFDE_CSSStyleSheetTest, ParseBorderLeftThick) {
+  LoadAndVerifyDecl(L"a { border-left: thick; }", 1);
+  VerifyEnum(FDE_CSSProperty::BorderLeftWidth, FDE_CSSPropertyValue::Thick);
+}
+
+TEST_F(CFDE_CSSStyleSheetTest, ParseBorderRight) {
+  LoadAndVerifyDecl(L"a { border-right: 2.5pc; }", 1);
+  VerifyFloat(FDE_CSSProperty::BorderRightWidth, 2.5,
+              FDE_CSSPrimitiveType::Picas);
+}
+
+TEST_F(CFDE_CSSStyleSheetTest, ParseBorderTop) {
+  LoadAndVerifyDecl(L"a { border-top: 2.5pc; }", 1);
+  VerifyFloat(FDE_CSSProperty::BorderTopWidth, 2.5,
+              FDE_CSSPrimitiveType::Picas);
+}
+
+TEST_F(CFDE_CSSStyleSheetTest, ParseBorderBottom) {
+  LoadAndVerifyDecl(L"a { border-bottom: 2.5pc; }", 1);
+  VerifyFloat(FDE_CSSProperty::BorderBottomWidth, 2.5,
+              FDE_CSSPrimitiveType::Picas);
+}