1 //===- llvm/unittest/ADT/DeltaAlgorithmTest.cpp ---------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "gtest/gtest.h"
11 #include "llvm/ADT/DeltaAlgorithm.h"
18 std::ostream &operator<<(std::ostream &OS,
19 const std::set<unsigned> &S) {
21 for (std::set<unsigned>::const_iterator it = S.begin(),
22 ie = S.end(); it != ie; ++it) {
35 class FixedDeltaAlgorithm : public DeltaAlgorithm {
36 changeset_ty FailingSet;
40 virtual bool ExecuteOneTest(const changeset_ty &Changes) {
42 return std::includes(Changes.begin(), Changes.end(),
43 FailingSet.begin(), FailingSet.end());
47 FixedDeltaAlgorithm(const changeset_ty &_FailingSet)
48 : FailingSet(_FailingSet),
51 unsigned getNumTests() const { return NumTests; }
54 std::set<unsigned> fixed_set(unsigned N, ...) {
58 for (unsigned i = 0; i != N; ++i)
59 S.insert(va_arg(ap, unsigned));
64 std::set<unsigned> range(unsigned Start, unsigned End) {
71 std::set<unsigned> range(unsigned N) {
75 TEST(DeltaAlgorithmTest, Basic) {
77 // [0, 20) should minimize to {3,5,7} in a reasonable number of tests.
78 std::set<unsigned> Fails = fixed_set(3, 3, 5, 7);
79 FixedDeltaAlgorithm FDA(Fails);
80 EXPECT_EQ(fixed_set(3, 3, 5, 7), FDA.Run(range(20)));
81 EXPECT_GE(33U, FDA.getNumTests());
84 // [10, 20) should minimize to [10,20)
85 EXPECT_EQ(range(10,20), FDA.Run(range(10,20)));
88 // [0, 4) should minimize to [0,4) in 11 tests.
91 // {0}, {1}, {2}, {3},
92 // {1, 2, 3}, {0, 2, 3}, {0, 1, 3}, {0, 1, 2},
94 FDA = FixedDeltaAlgorithm(range(10));
95 EXPECT_EQ(range(4), FDA.Run(range(4)));
96 EXPECT_EQ(11U, FDA.getNumTests());