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
14namespace clang {
15namespace format {
16namespace {
17
18class IndexedTokenSourceTest : public testing::Test {
19protected:
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
39TEST_F(IndexedTokenSourceTest, EmptyInput) {
40 IndexedTokenSource Source(lex(Code: ""));
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
52TEST_F(IndexedTokenSourceTest, NavigateTokenStream) {
53 IndexedTokenSource Source(lex(Code: "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
70TEST_F(IndexedTokenSourceTest, ResetPosition) {
71 IndexedTokenSource Source(lex(Code: "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
80TEST_F(IndexedTokenSourceTest, InsertTokens) {
81 IndexedTokenSource Source(lex(Code: "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
89TEST_F(IndexedTokenSourceTest, InsertTokensAtEOF) {
90 IndexedTokenSource Source(lex(Code: "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
98TEST_F(IndexedTokenSourceTest, InsertTokensRecursive) {
99 IndexedTokenSource Source(lex(Code: "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
113TEST_F(IndexedTokenSourceTest, InsertTokensRecursiveAtEndOfSequence) {
114 IndexedTokenSource Source(lex(Code: "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

source code of clang/unittests/Format/FormatTokenSourceTest.cpp