forked from OSchip/llvm-project
141 lines
3.1 KiB
C++
141 lines
3.1 KiB
C++
//===-- StringLexerTest.cpp -------------------------------------*- C++ -*-===//
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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 "lldb/Utility/StringLexer.h"
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#include "gtest/gtest.h"
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using namespace lldb_utility;
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TEST(StringLexerTest, GetUnlexed) {
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StringLexer l("foo");
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EXPECT_EQ("foo", l.GetUnlexed());
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l.Next();
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EXPECT_EQ("oo", l.GetUnlexed());
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l.Next();
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l.Next();
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EXPECT_EQ("", l.GetUnlexed());
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}
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TEST(StringLexerTest, HasAtLeast) {
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StringLexer l("foo");
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EXPECT_FALSE(l.HasAtLeast(5));
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EXPECT_FALSE(l.HasAtLeast(4));
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EXPECT_TRUE(l.HasAtLeast(3));
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EXPECT_TRUE(l.HasAtLeast(2));
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EXPECT_TRUE(l.HasAtLeast(1));
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l.Next();
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EXPECT_FALSE(l.HasAtLeast(5));
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EXPECT_FALSE(l.HasAtLeast(4));
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EXPECT_FALSE(l.HasAtLeast(3));
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EXPECT_TRUE(l.HasAtLeast(2));
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EXPECT_TRUE(l.HasAtLeast(1));
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l.Next();
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l.Next();
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EXPECT_FALSE(l.HasAtLeast(5));
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EXPECT_FALSE(l.HasAtLeast(4));
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EXPECT_FALSE(l.HasAtLeast(3));
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EXPECT_FALSE(l.HasAtLeast(2));
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EXPECT_FALSE(l.HasAtLeast(1));
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}
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TEST(StringLexerTest, AdvanceIf) {
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StringLexer l("foobar");
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EXPECT_FALSE(l.AdvanceIf("oo"));
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// Skip the "fo" part.
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EXPECT_TRUE(l.AdvanceIf("fo"));
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EXPECT_FALSE(l.AdvanceIf("obarz"));
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// Skip the remaining string.
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EXPECT_TRUE(l.AdvanceIf("obar"));
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EXPECT_FALSE(l.AdvanceIf("obarz"));
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EXPECT_FALSE(l.AdvanceIf("foo"));
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EXPECT_FALSE(l.AdvanceIf("o"));
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EXPECT_FALSE(l.AdvanceIf(" "));
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}
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TEST(StringLexerTest, PutBack) {
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StringLexer l("foo");
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l.Next();
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l.PutBack(1);
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EXPECT_EQ("foo", l.GetUnlexed());
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l.Next();
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l.Next();
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l.Next();
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l.PutBack(2);
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EXPECT_EQ("oo", l.GetUnlexed());
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l.PutBack(1);
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EXPECT_EQ("foo", l.GetUnlexed());
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}
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TEST(StringLexerTest, Peek) {
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StringLexer l("foo");
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EXPECT_EQ('f', l.Peek());
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l.Next();
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EXPECT_EQ('o', l.Peek());
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l.Next();
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EXPECT_EQ('o', l.Peek());
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}
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TEST(StringLexerTest, Next) {
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StringLexer l("foo");
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EXPECT_EQ('f', l.Next());
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EXPECT_EQ('o', l.Next());
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EXPECT_EQ('o', l.Next());
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}
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TEST(StringLexerTest, NextIf) {
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StringLexer l("foo");
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EXPECT_FALSE(l.NextIf('\0'));
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EXPECT_FALSE(l.NextIf(' '));
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EXPECT_FALSE(l.NextIf('o'));
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EXPECT_TRUE(l.NextIf('f'));
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EXPECT_FALSE(l.NextIf('\0'));
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EXPECT_FALSE(l.NextIf(' '));
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EXPECT_FALSE(l.NextIf('f'));
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EXPECT_TRUE(l.NextIf('o'));
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EXPECT_FALSE(l.NextIf('\0'));
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EXPECT_FALSE(l.NextIf(' '));
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EXPECT_FALSE(l.NextIf('f'));
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EXPECT_TRUE(l.NextIf('o'));
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}
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TEST(StringLexerTest, NextIfList) {
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StringLexer l("foo");
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EXPECT_FALSE(l.NextIf({'\0', ' ', 'o'}).first);
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auto r = l.NextIf({'f'});
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EXPECT_TRUE(r.first);
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EXPECT_EQ('f', r.second);
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EXPECT_FALSE(l.NextIf({'\0', ' ', 'f'}).first);
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r = l.NextIf({'f', 'o'});
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EXPECT_TRUE(r.first);
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EXPECT_EQ('o', r.second);
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EXPECT_FALSE(l.NextIf({'\0', ' ', 'f'}).first);
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r = l.NextIf({'*', 'f', 'o', 'o'});
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EXPECT_TRUE(r.first);
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EXPECT_EQ('o', r.second);
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}
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