8fda8901e2
This is a counterpart to llvm::orc::SymbolStringPool. It holds uniqued, ref-counted strings; and can be used to avoid redundant storage of strings, and speed up comparison of strings held in the pool (these become pointer comparisons).
67 lines
1.8 KiB
C++
67 lines
1.8 KiB
C++
//===---------- string_pool_test.cpp - Unit tests for StringPool ----------===//
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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 "string_pool.h"
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#include "gtest/gtest.h"
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using namespace __orc_rt;
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namespace {
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TEST(StringPool, UniquingAndComparisons) {
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StringPool SP;
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auto P1 = SP.intern("hello");
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std::string S("hel");
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S += "lo";
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auto P2 = SP.intern(S);
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auto P3 = SP.intern("goodbye");
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EXPECT_EQ(P1, P2) << "Failed to unique entries";
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EXPECT_NE(P1, P3) << "Unequal pooled strings comparing equal";
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// We want to test that less-than comparison of PooledStringPtrs compiles,
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// however we can't test the actual result as this is a pointer comparison and
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// PooledStringPtr doesn't expose the underlying address of the string.
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(void)(P1 < P3);
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}
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TEST(StringPool, Dereference) {
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StringPool SP;
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auto Foo = SP.intern("foo");
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EXPECT_EQ(*Foo, "foo") << "Equality on dereferenced string failed";
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}
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TEST(StringPool, ClearDeadEntries) {
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StringPool SP;
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{
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auto P1 = SP.intern("s1");
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SP.clearDeadEntries();
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EXPECT_FALSE(SP.empty()) << "\"s1\" entry in pool should still be retained";
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}
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SP.clearDeadEntries();
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EXPECT_TRUE(SP.empty()) << "pool should be empty";
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}
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TEST(StringPool, NullPtr) {
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// Make sure that we can default construct and then destroy a null
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// PooledStringPtr.
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PooledStringPtr Null;
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}
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TEST(StringPool, Hashable) {
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StringPool SP;
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PooledStringPtr P1 = SP.intern("s1");
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PooledStringPtr Null;
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EXPECT_NE(std::hash<PooledStringPtr>()(P1),
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std::hash<PooledStringPtr>()(Null));
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}
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} // end anonymous namespace
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