93 lines
3.1 KiB
C
93 lines
3.1 KiB
C
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//===- unittests/AST/ASTPrint.h ------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// Helpers to simplify testing of printing of AST constructs provided in the/
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// form of the source code.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/AST/ASTContext.h"
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#include "clang/ASTMatchers/ASTMatchFinder.h"
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#include "clang/Tooling/Tooling.h"
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#include "llvm/ADT/SmallString.h"
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#include "gtest/gtest.h"
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namespace clang {
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using PolicyAdjusterType =
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Optional<llvm::function_ref<void(PrintingPolicy &Policy)>>;
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static void PrintStmt(raw_ostream &Out, const ASTContext *Context,
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const Stmt *S, PolicyAdjusterType PolicyAdjuster) {
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assert(S != nullptr && "Expected non-null Stmt");
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PrintingPolicy Policy = Context->getPrintingPolicy();
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if (PolicyAdjuster)
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(*PolicyAdjuster)(Policy);
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S->printPretty(Out, /*Helper*/ nullptr, Policy);
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}
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class PrintMatch : public ast_matchers::MatchFinder::MatchCallback {
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SmallString<1024> Printed;
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unsigned NumFoundStmts;
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PolicyAdjusterType PolicyAdjuster;
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public:
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PrintMatch(PolicyAdjusterType PolicyAdjuster)
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: NumFoundStmts(0), PolicyAdjuster(PolicyAdjuster) {}
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void run(const ast_matchers::MatchFinder::MatchResult &Result) override {
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const Stmt *S = Result.Nodes.getNodeAs<Stmt>("id");
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if (!S)
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return;
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NumFoundStmts++;
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if (NumFoundStmts > 1)
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return;
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llvm::raw_svector_ostream Out(Printed);
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PrintStmt(Out, Result.Context, S, PolicyAdjuster);
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}
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StringRef getPrinted() const { return Printed; }
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unsigned getNumFoundStmts() const { return NumFoundStmts; }
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};
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template <typename T>
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::testing::AssertionResult
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PrintedStmtMatches(StringRef Code, const std::vector<std::string> &Args,
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const T &NodeMatch, StringRef ExpectedPrinted,
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PolicyAdjusterType PolicyAdjuster = None) {
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PrintMatch Printer(PolicyAdjuster);
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ast_matchers::MatchFinder Finder;
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Finder.addMatcher(NodeMatch, &Printer);
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std::unique_ptr<tooling::FrontendActionFactory> Factory(
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tooling::newFrontendActionFactory(&Finder));
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if (!tooling::runToolOnCodeWithArgs(Factory->create(), Code, Args))
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return testing::AssertionFailure()
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<< "Parsing error in \"" << Code.str() << "\"";
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if (Printer.getNumFoundStmts() == 0)
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return testing::AssertionFailure() << "Matcher didn't find any statements";
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if (Printer.getNumFoundStmts() > 1)
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return testing::AssertionFailure()
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<< "Matcher should match only one statement (found "
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<< Printer.getNumFoundStmts() << ")";
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if (Printer.getPrinted() != ExpectedPrinted)
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return ::testing::AssertionFailure()
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<< "Expected \"" << ExpectedPrinted.str() << "\", got \""
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<< Printer.getPrinted().str() << "\"";
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return ::testing::AssertionSuccess();
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}
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} // namespace clang
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