1 //===- unittest/Format/FormatTokenSourceTest.cpp --------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 #include "../../lib/Format/FormatTokenSource.h"
10 #include "TestLexer.h"
11 #include "clang/Basic/TokenKinds.h"
12 #include "gtest/gtest.h"
13
14 namespace clang {
15 namespace format {
16 namespace {
17
18 class IndexedTokenSourceTest : public testing::Test {
19 protected:
lex(StringRef Code,const FormatStyle & Style=getLLVMStyle ())20 TokenList lex(StringRef Code, const FormatStyle &Style = getLLVMStyle()) {
21 return TestLexer(Allocator, Buffers, Style).lex(Code);
22 }
23 llvm::SpecificBumpPtrAllocator<FormatToken> Allocator;
24 std::vector<std::unique_ptr<llvm::MemoryBuffer>> Buffers;
25 };
26
27 #define EXPECT_TOKEN_KIND(FormatTok, Kind) \
28 do { \
29 FormatToken *Tok = FormatTok; \
30 EXPECT_EQ(Tok->Tok.getKind(), Kind) << *Tok; \
31 } while (false);
32 #define EXPECT_TOKEN_ID(FormatTok, Name) \
33 do { \
34 FormatToken *Tok = FormatTok; \
35 EXPECT_EQ(Tok->Tok.getKind(), tok::identifier) << *Tok; \
36 EXPECT_EQ(Tok->TokenText, Name) << *Tok; \
37 } while (false);
38
TEST_F(IndexedTokenSourceTest,EmptyInput)39 TEST_F(IndexedTokenSourceTest, EmptyInput) {
40 IndexedTokenSource Source(lex(""));
41 EXPECT_FALSE(Source.isEOF());
42 EXPECT_TOKEN_KIND(Source.getNextToken(), tok::eof);
43 EXPECT_TRUE(Source.isEOF());
44 EXPECT_TOKEN_KIND(Source.getNextToken(), tok::eof);
45 EXPECT_TRUE(Source.isEOF());
46 EXPECT_TOKEN_KIND(Source.peekNextToken(/*SkipComment=*/false), tok::eof);
47 EXPECT_TOKEN_KIND(Source.peekNextToken(/*SkipComment=*/true), tok::eof);
48 EXPECT_EQ(Source.getPreviousToken(), nullptr);
49 EXPECT_TRUE(Source.isEOF());
50 }
51
TEST_F(IndexedTokenSourceTest,NavigateTokenStream)52 TEST_F(IndexedTokenSourceTest, NavigateTokenStream) {
53 IndexedTokenSource Source(lex("int a;"));
54 EXPECT_TOKEN_KIND(Source.peekNextToken(), tok::kw_int);
55 EXPECT_TOKEN_KIND(Source.getNextToken(), tok::kw_int);
56 EXPECT_EQ(Source.getPreviousToken(), nullptr);
57 EXPECT_TOKEN_KIND(Source.peekNextToken(), tok::identifier);
58 EXPECT_TOKEN_KIND(Source.getNextToken(), tok::identifier);
59 EXPECT_TOKEN_KIND(Source.getPreviousToken(), tok::kw_int);
60 EXPECT_TOKEN_KIND(Source.peekNextToken(), tok::semi);
61 EXPECT_TOKEN_KIND(Source.getNextToken(), tok::semi);
62 EXPECT_TOKEN_KIND(Source.getPreviousToken(), tok::identifier);
63 EXPECT_TOKEN_KIND(Source.peekNextToken(), tok::eof);
64 EXPECT_TOKEN_KIND(Source.getNextToken(), tok::eof);
65 EXPECT_TOKEN_KIND(Source.getPreviousToken(), tok::semi);
66 EXPECT_TOKEN_KIND(Source.getNextToken(), tok::eof);
67 EXPECT_TOKEN_KIND(Source.getPreviousToken(), tok::semi);
68 }
69
TEST_F(IndexedTokenSourceTest,ResetPosition)70 TEST_F(IndexedTokenSourceTest, ResetPosition) {
71 IndexedTokenSource Source(lex("int a;"));
72 Source.getNextToken();
73 unsigned Position = Source.getPosition();
74 Source.getNextToken();
75 Source.getNextToken();
76 EXPECT_TOKEN_KIND(Source.getNextToken(), tok::eof);
77 EXPECT_TOKEN_KIND(Source.setPosition(Position), tok::kw_int);
78 }
79
TEST_F(IndexedTokenSourceTest,InsertTokens)80 TEST_F(IndexedTokenSourceTest, InsertTokens) {
81 IndexedTokenSource Source(lex("A1 A2"));
82 EXPECT_TOKEN_ID(Source.getNextToken(), "A1");
83 EXPECT_TOKEN_ID(Source.insertTokens(lex("B1 B2")), "B1");
84 EXPECT_TOKEN_ID(Source.getNextToken(), "B2");
85 EXPECT_TOKEN_ID(Source.getNextToken(), "A1");
86 EXPECT_TOKEN_ID(Source.getNextToken(), "A2");
87 }
88
TEST_F(IndexedTokenSourceTest,InsertTokensAtEOF)89 TEST_F(IndexedTokenSourceTest, InsertTokensAtEOF) {
90 IndexedTokenSource Source(lex("A1"));
91 EXPECT_TOKEN_ID(Source.getNextToken(), "A1");
92 EXPECT_TOKEN_KIND(Source.getNextToken(), tok::eof);
93 EXPECT_TOKEN_ID(Source.insertTokens(lex("B1 B2")), "B1");
94 EXPECT_TOKEN_ID(Source.getNextToken(), "B2");
95 EXPECT_TOKEN_KIND(Source.getNextToken(), tok::eof);
96 }
97
TEST_F(IndexedTokenSourceTest,InsertTokensRecursive)98 TEST_F(IndexedTokenSourceTest, InsertTokensRecursive) {
99 IndexedTokenSource Source(lex("A1"));
100 EXPECT_TOKEN_ID(Source.getNextToken(), "A1");
101 // A1
102 EXPECT_TOKEN_ID(Source.insertTokens(lex("B1")), "B1");
103 // B1 A1
104 EXPECT_TOKEN_ID(Source.insertTokens(lex("C1")), "C1");
105 // C1 B1 A1
106 EXPECT_TOKEN_ID(Source.insertTokens(lex("D1")), "D1");
107 // D1 C1 B1 A1
108 EXPECT_TOKEN_ID(Source.getNextToken(), "C1");
109 EXPECT_TOKEN_ID(Source.getNextToken(), "B1");
110 EXPECT_TOKEN_ID(Source.getNextToken(), "A1");
111 }
112
TEST_F(IndexedTokenSourceTest,InsertTokensRecursiveAtEndOfSequence)113 TEST_F(IndexedTokenSourceTest, InsertTokensRecursiveAtEndOfSequence) {
114 IndexedTokenSource Source(lex("A1"));
115 EXPECT_TOKEN_ID(Source.getNextToken(), "A1");
116 EXPECT_TOKEN_ID(Source.insertTokens(lex("B1")), "B1");
117 EXPECT_TOKEN_ID(Source.getNextToken(), "A1");
118 EXPECT_TOKEN_ID(Source.insertTokens(lex("C1")), "C1");
119 EXPECT_TOKEN_ID(Source.getNextToken(), "A1");
120 EXPECT_TOKEN_ID(Source.insertTokens(lex("D1")), "D1");
121 EXPECT_TOKEN_ID(Source.getNextToken(), "A1");
122 }
123
124 } // namespace
125 } // namespace format
126 } // namespace clang
127