Update failing PDB unit tests that are searching for symbols by regex

[asmith]

Summary

D41086 fixed an exception in FindTypes()/FindTypesByRegex() and caused two lldb unit test to fail. This change updates the unit tests to pass again.

[asmith]

From Zachary Turner [6:46 PM (3 hours ago)]

Sorry I missed this, lgtm

[asmith]

Formatting; NFC

source/Plugins/SymbolFile/PDB/SymbolFilePDB.h

FindTypes(const lldb_private::SymbolContext &sc,
             const lldb_private::CompilerDeclContext *parent_decl_ctx,
             bool append, uint32_t max_matches,
             llvm::DenseSet<lldb_private::SymbolFile *> &searched_symbol_files,
             lldb_private::TypeMap &types) override;
 
   size_t FindTypes(const std::vector<lldb_private::CompilerContext> &context,
                    bool append, lldb_private::TypeMap &types) override;
 
+  void FindTypesByRegex(const lldb_private::RegularExpression &regex,
+                        uint32_t max_matches,
+                        lldb_private::TypeMap &types);
+
   lldb_private::TypeList *GetTypeList() override;
 
   size_t GetTypes(lldb_private::SymbolContextScope *sc_scope,
                   uint32_t type_mask,
                   lldb_private::TypeList &type_list) override;
 
   lldb_private::TypeSystem *
   GetTypeSystemForLanguage(lldb::LanguageType language) override;

unittests/SymbolFile/PDB/SymbolFilePDBTests.cpp

 TEST_F(SymbolFilePDBTests, TestRegexNameMatch) {
   FileSpec fspec(m_types_test_exe.c_str(), false);
   ArchSpec aspec("i686-pc-windows");
   lldb::ModuleSP module = std::make_shared<Module>(fspec, aspec);
 
   SymbolVendor *plugin = module->GetSymbolVendor();
   SymbolFilePDB *symfile =
       static_cast<SymbolFilePDB *>(plugin->GetSymbolFile());
-  SymbolContext sc;
-  llvm::DenseSet<SymbolFile *> searched_files;
   TypeMap results;
-  uint32_t num_results = symfile->FindTypes(sc, ConstString(".*"), nullptr,
-                                            false, 0, searched_files, results);
-  EXPECT_GT(num_results, 1u);
-  EXPECT_EQ(num_results, results.GetSize());
+   
+  symfile->FindTypesByRegex(RegularExpression(".*"), 0, results);
+  EXPECT_GT(results.GetSize(), 1u);
 
   // We expect no exception thrown if the given regex can't be compiled
   results.Clear();
-  num_results = symfile->FindTypes(sc, ConstString("**"), nullptr,
-                                   false, 0, searched_files, results);
-  EXPECT_EQ(num_results, 0u);
-  EXPECT_EQ(num_results, results.GetSize());
+  symfile->FindTypesByRegex(RegularExpression("**"), 0, results);
+  EXPECT_EQ(0u, results.GetSize());
 }
 
 TEST_F(SymbolFilePDBTests, TestMaxMatches) {
   FileSpec fspec(m_types_test_exe.c_str(), false);
   ArchSpec aspec("i686-pc-windows");
   lldb::ModuleSP module = std::make_shared<Module>(fspec, aspec);
 
   SymbolVendor *plugin = module->GetSymbolVendor();
   SymbolFilePDB *symfile =
       static_cast<SymbolFilePDB *>(plugin->GetSymbolFile());
   SymbolContext sc;
   llvm::DenseSet<SymbolFile *> searched_files;
   TypeMap results;
-  uint32_t num_results = symfile->FindTypes(sc, ConstString(".*"), nullptr,
+  const ConstString name("ClassTypedef");
+  uint32_t num_results = symfile->FindTypes(sc, name, nullptr,
                                             false, 0, searched_files, results);
   // Try to limit ourselves from 1 to 10 results, otherwise we could be doing
   // this thousands of times.
   // The idea is just to make sure that for a variety of values, the number of
   // limited results always
   // comes out to the number we are expecting.
   uint32_t iterations = std::min(num_results, 10u);
   for (uint32_t i = 1; i <= iterations; ++i) {
     uint32_t num_limited_results = symfile->FindTypes(
-        sc, ConstString(".*"), nullptr, false, i, searched_files, results);
+        sc, name, nullptr, false, i, searched_files, results);
     EXPECT_EQ(i, num_limited_results);
     EXPECT_EQ(num_limited_results, results.GetSize());
   }
 }
 
 TEST_F(SymbolFilePDBTests, TestNullName) {
   FileSpec fspec(m_types_test_exe.c_str(), false);
   ArchSpec aspec("i686-pc-windows");