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//===-- interval_map_test.cpp ---------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file is a part of the ORC runtime.
//
//===----------------------------------------------------------------------===//
#include "interval_map.h"
#include "gtest/gtest.h"
using namespace __orc_rt;
TEST(IntervalMapTest, DefaultConstructed) {
// Check that a default-constructed IntervalMap behaves as expected.
IntervalMap<unsigned, unsigned, IntervalCoalescing::Enabled> M;
EXPECT_TRUE(M.empty());
EXPECT_TRUE(M.begin() == M.end());
EXPECT_TRUE(M.find(0) == M.end());
}
TEST(IntervalMapTest, InsertSingleElement) {
// Check that a map with a single element inserted behaves as expected.
IntervalMap<unsigned, unsigned, IntervalCoalescing::Enabled> M;
M.insert(7, 8, 42);
EXPECT_FALSE(M.empty());
EXPECT_EQ(std::next(M.begin()), M.end());
EXPECT_EQ(M.find(7), M.begin());
EXPECT_EQ(M.find(8), M.end());
EXPECT_EQ(M.lookup(7), 42U);
EXPECT_EQ(M.lookup(8), 0U); // 8 not present, so should return unsigned().
}
TEST(IntervalMapTest, InsertCoalesceWithPrevious) {
// Check that insertions coalesce with previous ranges that share the same
// value. Also check that they _don't_ coalesce if the values are different.
// Check that insertion coalesces with previous range when values are equal.
IntervalMap<unsigned, unsigned, IntervalCoalescing::Enabled> M1;
M1.insert(7, 8, 42);
M1.insert(8, 9, 42);
EXPECT_FALSE(M1.empty());
EXPECT_EQ(std::next(M1.begin()), M1.end()); // Should see just one range.
EXPECT_EQ(M1.find(7), M1.find(8)); // 7 and 8 should point to same range.
EXPECT_EQ(M1.lookup(7), 42U); // Value should be preserved.
// Check that insertion does not coalesce with previous range when values are
// not equal.
IntervalMap<unsigned, unsigned, IntervalCoalescing::Enabled> M2;
M2.insert(7, 8, 42);
M2.insert(8, 9, 7);
EXPECT_FALSE(M2.empty());
EXPECT_EQ(std::next(std::next(M2.begin())), M2.end()); // Expect two ranges.
EXPECT_NE(M2.find(7), M2.find(8)); // 7 and 8 should be different ranges.
EXPECT_EQ(M2.lookup(7), 42U); // Keys 7 and 8 should map to different values.
EXPECT_EQ(M2.lookup(8), 7U);
}
TEST(IntervalMapTest, InsertCoalesceWithFollowing) {
// Check that insertions coalesce with following ranges that share the same
// value. Also check that they _don't_ coalesce if the values are different.
// Check that insertion coalesces with following range when values are equal.
IntervalMap<unsigned, unsigned, IntervalCoalescing::Enabled> M1;
M1.insert(8, 9, 42);
M1.insert(7, 8, 42);
EXPECT_FALSE(M1.empty());
EXPECT_EQ(std::next(M1.begin()), M1.end()); // Should see just one range.
EXPECT_EQ(M1.find(7), M1.find(8)); // 7 and 8 should point to same range.
EXPECT_EQ(M1.lookup(7), 42U); // Value should be preserved.
// Check that insertion does not coalesce with previous range when values are
// not equal.
IntervalMap<unsigned, unsigned, IntervalCoalescing::Enabled> M2;
M2.insert(8, 9, 42);
M2.insert(7, 8, 7);
EXPECT_FALSE(M2.empty());
EXPECT_EQ(std::next(std::next(M2.begin())), M2.end()); // Expect two ranges.
EXPECT_EQ(M2.lookup(7), 7U); // Keys 7 and 8 should map to different values.
EXPECT_EQ(M2.lookup(8), 42U);
}
TEST(IntervalMapTest, InsertCoalesceBoth) {
// Check that insertions coalesce with ranges on both sides where posssible.
// Also check that they _don't_ coalesce if the values are different.
// Check that insertion coalesces with both previous and following ranges
// when values are equal.
IntervalMap<unsigned, unsigned, IntervalCoalescing::Enabled> M1;
M1.insert(7, 8, 42);
M1.insert(9, 10, 42);
// Check no coalescing yet.
EXPECT_NE(M1.find(7), M1.find(9));
// Insert a 3rd range to trigger coalescing on both sides.
M1.insert(8, 9, 42);
EXPECT_FALSE(M1.empty());
EXPECT_EQ(std::next(M1.begin()), M1.end()); // Should see just one range.
EXPECT_EQ(M1.find(7), M1.find(8)); // 7, 8, and 9 should point to same range.
EXPECT_EQ(M1.find(8), M1.find(9));
EXPECT_EQ(M1.lookup(7), 42U); // Value should be preserved.
// Check that insertion does not coalesce with previous range when values are
// not equal.
IntervalMap<unsigned, unsigned, IntervalCoalescing::Enabled> M2;
M2.insert(7, 8, 42);
M2.insert(8, 9, 7);
M2.insert(9, 10, 42);
EXPECT_FALSE(M2.empty());
// Expect three ranges.
EXPECT_EQ(std::next(std::next(std::next(M2.begin()))), M2.end());
EXPECT_NE(M2.find(7), M2.find(8)); // All keys should map to different ranges.
EXPECT_NE(M2.find(8), M2.find(9));
EXPECT_EQ(M2.lookup(7), 42U); // Key 7, 8, and 9 should map to different vals.
EXPECT_EQ(M2.lookup(8), 7U);
EXPECT_EQ(M2.lookup(9), 42U);
}
TEST(IntervalMapTest, EraseSingleElement) {
// Check that we can insert and then remove a single range.
IntervalMap<unsigned, unsigned, IntervalCoalescing::Enabled> M;
M.insert(7, 10, 42);
EXPECT_FALSE(M.empty());
M.erase(7, 10);
EXPECT_TRUE(M.empty());
}
TEST(IntervalMapTest, EraseSplittingLeft) {
// Check that removal of a trailing subrange succeeds, but leaves the
// residual range in-place.
IntervalMap<unsigned, unsigned, IntervalCoalescing::Enabled> M;
M.insert(7, 10, 42);
EXPECT_FALSE(M.empty());
M.erase(9, 10);
EXPECT_EQ(std::next(M.begin()), M.end());
EXPECT_EQ(M.begin()->first.first, 7U);
EXPECT_EQ(M.begin()->first.second, 9U);
}
TEST(IntervalMapTest, EraseSplittingRight) {
// Check that removal of a leading subrange succeeds, but leaves the
// residual range in-place.
IntervalMap<unsigned, unsigned, IntervalCoalescing::Enabled> M;
M.insert(7, 10, 42);
EXPECT_FALSE(M.empty());
M.erase(7, 8);
EXPECT_EQ(std::next(M.begin()), M.end());
EXPECT_EQ(M.begin()->first.first, 8U);
EXPECT_EQ(M.begin()->first.second, 10U);
}
TEST(IntervalMapTest, EraseSplittingBoth) {
// Check that removal of an interior subrange leaves both the leading and
// trailing residual subranges in-place.
IntervalMap<unsigned, unsigned, IntervalCoalescing::Enabled> M;
M.insert(7, 10, 42);
EXPECT_FALSE(M.empty());
M.erase(8, 9);
EXPECT_EQ(std::next(std::next(M.begin())), M.end());
EXPECT_EQ(M.begin()->first.first, 7U);
EXPECT_EQ(M.begin()->first.second, 8U);
EXPECT_EQ(std::next(M.begin())->first.first, 9U);
EXPECT_EQ(std::next(M.begin())->first.second, 10U);
}
TEST(IntervalMapTest, NonCoalescingMapPermitsNonComparableKeys) {
// Test that values that can't be equality-compared are still usable when
// coalescing is disabled and behave as expected.
struct S {}; // Struct with no equality comparison.
IntervalMap<unsigned, S, IntervalCoalescing::Disabled> M;
M.insert(7, 8, S());
EXPECT_FALSE(M.empty());
EXPECT_EQ(std::next(M.begin()), M.end());
EXPECT_EQ(M.find(7), M.begin());
EXPECT_EQ(M.find(8), M.end());
}
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