Add CSS parser tests

This CL adds more unit tests to the css parser and removes some unused code.

Change-Id: If233040e19c7a79a907a3215877e042ac388d61b
Reviewed-on: https://pdfium-review.googlesource.com/2412
Commit-Queue: dsinclair <dsinclair@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>

3 files changed, 53 insertions, 11 deletions

diff --git a/xfa/fde/css/cfde_cssselector.cpp b/xfa/fde/css/cfde_cssselector.cpp
index 718cb46415..6d181ac325 100644
--- a/xfa/fde/css/cfde_cssselector.cpp
+++ b/xfa/fde/css/cfde_cssselector.cpp
@@ -53,10 +53,6 @@ CFDE_CSSSelector* CFDE_CSSSelector::GetNextSelector() const {
   return m_pNext.get();
 }
 
-std::unique_ptr<CFDE_CSSSelector> CFDE_CSSSelector::ReleaseNextSelector() {
-  return std::move(m_pNext);
-}
-
 std::unique_ptr<CFDE_CSSSelector> CFDE_CSSSelector::FromString(
     const FX_WCHAR* psz,
     int32_t iLen) {
@@ -74,15 +70,10 @@ std::unique_ptr<CFDE_CSSSelector> CFDE_CSSSelector::FromString(
   }
 
   std::unique_ptr<CFDE_CSSSelector> pFirst = nullptr;
-  CFDE_CSSSelector* pLast = nullptr;
-
   for (psz = pStart; psz < pEnd;) {
     FX_WCHAR wch = *psz;
     if (IsCSSChar(wch) || wch == '*') {
       int32_t iNameLen = wch == '*' ? 1 : GetCSSNameLen(psz, pEnd);
-      if (iNameLen == 0)
-        return nullptr;
-
       auto p = pdfium::MakeUnique<CFDE_CSSSelector>(
           FDE_CSSSelectorType::Element, psz, iNameLen, true);
       if (pFirst) {
@@ -90,7 +81,6 @@ std::unique_ptr<CFDE_CSSSelector> CFDE_CSSSelector::FromString(
         p->SetNext(std::move(pFirst));
       }
       pFirst = std::move(p);
-      pLast = pFirst.get();
       psz += iNameLen;
     } else if (wch == ' ') {
       psz++;
diff --git a/xfa/fde/css/cfde_cssselector.h b/xfa/fde/css/cfde_cssselector.h
index 18a7c340e5..a5d9cf9c7c 100644
--- a/xfa/fde/css/cfde_cssselector.h
+++ b/xfa/fde/css/cfde_cssselector.h
@@ -27,7 +27,6 @@ class CFDE_CSSSelector {
   FDE_CSSSelectorType GetType() const;
   uint32_t GetNameHash() const;
   CFDE_CSSSelector* GetNextSelector() const;
-  std::unique_ptr<CFDE_CSSSelector> ReleaseNextSelector();
 
   void SetNext(std::unique_ptr<CFDE_CSSSelector> pNext) {
     m_pNext = std::move(pNext);
diff --git a/xfa/fde/css/cfde_cssstylesheet_unittest.cpp b/xfa/fde/css/cfde_cssstylesheet_unittest.cpp
index 048eeb7c84..c6886428ab 100644
--- a/xfa/fde/css/cfde_cssstylesheet_unittest.cpp
+++ b/xfa/fde/css/cfde_cssstylesheet_unittest.cpp
@@ -135,6 +135,59 @@ TEST_F(CFDE_CSSStyleSheetTest, ParseMultipleSelectors) {
              {FDE_CSSPropertyValue::Underline});
 }
 
+TEST_F(CFDE_CSSStyleSheetTest, ParseChildSelectors) {
+  const FX_WCHAR* buf = L"a b c { border: 10px; }";
+  EXPECT_TRUE(sheet_->LoadBuffer(buf, FXSYS_wcslen(buf)));
+  EXPECT_EQ(1, sheet_->CountRules());
+
+  CFDE_CSSStyleRule* style = sheet_->GetRule(0);
+  EXPECT_EQ(1UL, style->CountSelectorLists());
+
+  auto sel = style->GetSelectorList(0);
+  EXPECT_TRUE(sel != nullptr);
+  EXPECT_EQ(FX_HashCode_GetW(L"c", true), sel->GetNameHash());
+
+  sel = sel->GetNextSelector();
+  EXPECT_TRUE(sel != nullptr);
+  EXPECT_EQ(FX_HashCode_GetW(L"b", true), sel->GetNameHash());
+
+  sel = sel->GetNextSelector();
+  EXPECT_TRUE(sel != nullptr);
+  EXPECT_EQ(FX_HashCode_GetW(L"a", true), sel->GetNameHash());
+
+  sel = sel->GetNextSelector();
+  EXPECT_TRUE(sel == nullptr);
+
+  decl_ = style->GetDeclaration();
+  EXPECT_EQ(4UL, decl_->PropertyCountForTesting());
+
+  VerifyFloat(FDE_CSSProperty::BorderLeftWidth, 10.0,
+              FDE_CSSNumberType::Pixels);
+  VerifyFloat(FDE_CSSProperty::BorderRightWidth, 10.0,
+              FDE_CSSNumberType::Pixels);
+  VerifyFloat(FDE_CSSProperty::BorderTopWidth, 10.0, FDE_CSSNumberType::Pixels);
+  VerifyFloat(FDE_CSSProperty::BorderBottomWidth, 10.0,
+              FDE_CSSNumberType::Pixels);
+}
+
+TEST_F(CFDE_CSSStyleSheetTest, ParseUnhandledSelectors) {
+  const FX_WCHAR* buf = L"a > b { padding: 0; }";
+  EXPECT_TRUE(sheet_->LoadBuffer(buf, FXSYS_wcslen(buf)));
+  EXPECT_EQ(0, sheet_->CountRules());
+
+  buf = L"a[first] { padding: 0; }";
+  EXPECT_TRUE(sheet_->LoadBuffer(buf, FXSYS_wcslen(buf)));
+  EXPECT_EQ(0, sheet_->CountRules());
+
+  buf = L"a+b { padding: 0; }";
+  EXPECT_TRUE(sheet_->LoadBuffer(buf, FXSYS_wcslen(buf)));
+  EXPECT_EQ(0, sheet_->CountRules());
+
+  buf = L"a ^ b { padding: 0; }";
+  EXPECT_TRUE(sheet_->LoadBuffer(buf, FXSYS_wcslen(buf)));
+  EXPECT_EQ(0, sheet_->CountRules());
+}
+
 TEST_F(CFDE_CSSStyleSheetTest, ParseMultipleSelectorsCombined) {
   LoadAndVerifyDecl(L"a, b, c { border: 5px; }", {L"a", L"b", L"c"}, 4);
 }