/// #include "Test/IndexTester.h"
///
/// namespace clice::testing {
///
/// namespace {
///
/// TEST(Index, ClassTemplate) {
///     const char* code = R"cpp(
///     template <typename T, typename U>
///     struct $(primary_decl)foo;
///
///     /// using type = $(forward_full)foo<int, int>;
///
///     template <typename T, typename U>
///     struct $(primary)foo {};
///
///     template <typename T>
///     struct $(partial_spec_decl)foo<T, T>;
///
///     template <typename T>
///     struct $(partial_spec)foo<T, T> {};
///
///     template <>
///     struct $(full_spec_decl)foo<int, int>;
///
///     template <>
///     struct $(full_spec)foo<int, int> {};
///
///     template struct $(explicit_primary)foo<char, int>;
///
///     template struct $(explicit_partial)foo<char, char>;
///
///     $(implicit_primary_1)foo<int, char> b;
///     $(implicit_primary_2)foo<char, int> c;
///     $(implicit_partial)foo<char, char> d;
///     $(implicit_full)foo<int, int> a;
///)cpp";
///
///     IndexTester tester("main.cpp", code);
///     tester.run();
///     tester.GotoDefinition("primary_decl", "primary");
///     tester.GotoDefinition("explicit_primary", "primary");
///     tester.GotoDefinition("implicit_primary_1", "primary");
///     tester.GotoDefinition("implicit_primary_2", "primary");
///     tester.GotoDefinition("partial_spec_decl", "partial_spec");
///     tester.GotoDefinition("explicit_partial", "partial_spec");
///     tester.GotoDefinition("implicit_partial", "partial_spec");
///     /// FIXME: Figure forward template declaration.
///     /// tester.GotoDefinition("forward_full", "full_spec");
///     tester.GotoDefinition("full_spec_decl", "full_spec");
///     tester.GotoDefinition("implicit_full", "full_spec");
///
///     /// TODO: add more tests, FunctionTemplate, VarTemplate, ..., Dependent Name, ..., etc.
///     /// add tests for find references ..., !test symbol count.
/// }
///
/// TEST(Index, FunctionTemplate) {
///     /// Function template doesn't have partial specialization.
///     const char* code = R"cpp(
///     template <typename T> void $(primary_decl)foo();
///
///     template <typename T> void $(primary)foo() {}
///
///     template <> void $(spec_decl)foo<int>();
///
///     template <> void $(spec)foo<int>() {}
///
///     template void $(explicit_primary)foo<char>();
///
///     int main() {
///         $(implicit_primary)foo<char>();
///         $(implicit_spec)foo<int>();
///     }
///)cpp";
///
///     IndexTester tester("main.cpp", code);
///     tester.run();
///
///     tester.GotoDefinition("primary_decl", "primary");
///     /// FIXME:
///     /// tester.GotoDefinition("explicit_primary", "primary");
///     tester.GotoDefinition("implicit_primary", "primary");
///
///     tester.GotoDefinition("spec_decl", "spec");
///     tester.GotoDefinition("implicit_spec", "spec");
/// }
///
/// TEST(Index, AliasTemplate) {
///     const char* code = R"cpp(
///     template <typename T>
///     using $(primary)foo = T;
///
///     $(implicit_primary)foo<int> a;
///)cpp";
///
///     IndexTester tester("main.cpp", code);
///     tester.run();
///     tester.GotoDefinition("implicit_primary", "primary");
/// }
///
/// TEST(Index, VarTemplate) {
///     const char* code = R"cpp(
///     template <typename T, typename U>
///     extern int $(primary_decl)foo;
///
///     template <typename T, typename U>
///     int $(primary)foo = 1;
///
///     template <typename T>
///     extern int $(partial_spec_decl)foo<T, T>;
///
///     template <typename T>
///     int $(partial_spec)foo<T, T> = 2;
///
///     template <>
///     float $(full_spec)foo<int, int> = 1.0f;
///
///     template int $(explicit_primary)foo<char, int>;
///
///     template int $(explicit_partial)foo<char, char>;
///
///     int main() {
///         $(implicit_primary_1)foo<int, char> = 1;
///         $(implicit_primary_2)foo<char, int> = 2;
///         $(implicit_partial)foo<char, char> = 3;
///         $(implicit_full)foo<int, int> = 4;
///         return 0;
///     }
///)cpp";
///
///     IndexTester tester("main.cpp", code);
///     tester.run();
///
///     tester.GotoDefinition("primary_decl", "primary");
///     /// tester.GotoDefinition("explicit_primary", "primary");
///     tester.GotoDefinition("implicit_primary_1", "primary");
///     tester.GotoDefinition("implicit_primary_2", "primary");
///
///     tester.GotoDefinition("partial_spec_decl", "partial_spec");
///     /// tester.GotoDefinition("explicit_partial", "partial_spec");
///     tester.GotoDefinition("implicit_partial", "partial_spec");
///
///     tester.GotoDefinition("implicit_full", "full_spec");
/// }
///
/// TEST(Index, Concept) {
///     const char* code = R"cpp(
///     template <typename T>
///     concept $(primary)foo = true;
///
///     static_assert($(implicit)foo<int>);
///
///     $(implicit2)foo auto bar = 1;
///)cpp";
///
///     IndexTester tester("main.cpp", code);
///     tester.run();
///
///     tester.GotoDefinition("primary", "primary");
///     tester.GotoDefinition("implicit", "primary");
///     tester.GotoDefinition("implicit2", "primary");
/// }
///
/// }  // namespace
///
/// }  // namespace clice::testing