81 lines
3.5 KiB
C++
81 lines
3.5 KiB
C++
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//===- unittests/Rewrite/RewriterTest.cpp - Rewriter tests ----------------===//
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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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#include "clang/Rewrite/Core/Rewriter.h"
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#include "clang/Tooling/Tooling.h"
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#include "gtest/gtest.h"
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using namespace clang;
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namespace {
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struct RangeTypeTest {
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std::unique_ptr<ASTUnit> AST;
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Rewriter Rewrite;
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SourceLocation FileStart;
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CharSourceRange CRange; // covers exact char range
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CharSourceRange TRange; // extends CRange to whole tokens
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SourceRange SRange; // different type but behaves like TRange
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SourceLocation makeLoc(int Off) { return FileStart.getLocWithOffset(Off); }
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CharSourceRange makeCharRange(int StartOff, int EndOff) {
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return CharSourceRange::getCharRange(makeLoc(StartOff), makeLoc(EndOff));
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}
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RangeTypeTest(StringRef Code, int StartOff, int EndOff) {
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AST = tooling::buildASTFromCode(Code);
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ASTContext &C = AST->getASTContext();
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Rewrite = Rewriter(C.getSourceManager(), C.getLangOpts());
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FileStart = AST->getStartOfMainFileID();
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CRange = makeCharRange(StartOff, EndOff);
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SRange = CRange.getAsRange();
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TRange = CharSourceRange::getTokenRange(SRange);
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}
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};
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TEST(Rewriter, GetRewrittenTextRangeTypes) {
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// Check that correct text is retrieved for each range type. Check again
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// after a modification. Ranges remain in terms of the original text but
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// include the new text.
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StringRef Code = "int main() { return 0; }";
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// get char range ^~~ = "ret"
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// get token range ^~~+++ = "return"
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// get source range ^~~+++ = "return"
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// insert "x" ^
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// get char range ^~~ = "xret"
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// get token range ^~~+++ = "xreturn"
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// get source range ^~~+++ = "xreturn"
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RangeTypeTest T(Code, 13, 16);
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EXPECT_EQ(T.Rewrite.getRewrittenText(T.CRange), "ret");
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EXPECT_EQ(T.Rewrite.getRewrittenText(T.TRange), "return");
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EXPECT_EQ(T.Rewrite.getRewrittenText(T.SRange), "return");
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T.Rewrite.InsertText(T.makeLoc(13), "x");
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EXPECT_EQ(T.Rewrite.getRewrittenText(T.CRange), "xret");
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EXPECT_EQ(T.Rewrite.getRewrittenText(T.TRange), "xreturn");
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EXPECT_EQ(T.Rewrite.getRewrittenText(T.SRange), "xreturn");
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}
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TEST(Rewriter, ReplaceTextRangeTypes) {
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// Check that correct text is replaced for each range type. Ranges remain in
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// terms of the original text but include the new text.
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StringRef Code = "int main(int argc, char *argv[]) { return argc; }";
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// replace char range with "foo" ^~
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// get ^~~~~ = "foogc;"
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// replace token range with "bar" ^~++
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// get ^~~~~ = "bar;"
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// replace source range with "0" ^~++
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// get ^~~~~ = "0;"
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RangeTypeTest T(Code, 42, 44);
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T.Rewrite.ReplaceText(T.CRange, "foo");
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EXPECT_EQ(T.Rewrite.getRewrittenText(T.makeCharRange(42, 47)), "foogc;");
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T.Rewrite.ReplaceText(T.TRange, "bar");
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EXPECT_EQ(T.Rewrite.getRewrittenText(T.makeCharRange(42, 47)), "bar;");
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T.Rewrite.ReplaceText(T.SRange, "0");
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EXPECT_EQ(T.Rewrite.getRewrittenText(T.makeCharRange(42, 47)), "0;");
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}
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} // anonymous namespace
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