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Add some tests looking for a GncInt128 divide overflow problem.

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Problem mentioned in mail from Mike Alexander; this test doesn't find it.
This commit is contained in:
John Ralls 2017-04-02 16:33:01 -07:00
parent 5a58b93a71
commit 6e7334fe88
1 changed files with 47 additions and 0 deletions
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47
src/libqof/qof/test/gtest-gnc-int128.cpp
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@ -495,6 +495,53 @@ TEST(qofint128_functions, divide)
EXPECT_EQ (big, big %= bigger);
EXPECT_EQ (two, bigger /= big);
EXPECT_NO_THROW({
GncInt128 a(2, INT64_C(5501995774277214867));
GncInt128 b(0, INT64_C(2086443244332180413));
GncInt128 c = a / b;
EXPECT_EQ(11, c);
EXPECT_FALSE(c.isBig());
GncInt128 d(-2, INT64_C(5501995774277214867));
GncInt128 e(0, INT64_C(1995728320665563874));
c = d / e;
EXPECT_EQ(-15, c);
EXPECT_FALSE(c.isBig());
GncInt128 f(2, INT64_C(-5501995774277214867));
GncInt128 g(0, INT64_C(2086443244332180413));
c = f / g;
EXPECT_EQ(15, c);
EXPECT_FALSE(c.isBig());
GncInt128 h(2, INT64_C(5501995774277214867));
GncInt128 i(0, INT64_C(-2086443244332180413));
c = h / i;
EXPECT_EQ(-11, c);
EXPECT_FALSE(c.isBig());
GncInt128 j(-2, INT64_C(-5501995774277214867));
GncInt128 k(0, INT64_C(2086443244332180413));
c = j / k;
EXPECT_EQ(-11, c);
EXPECT_FALSE(c.isBig());
GncInt128 l(-2, INT64_C(-5501995774277214867));
GncInt128 m(0, INT64_C(-2086443244332180413));
c = l / m;
EXPECT_EQ(11, c);
EXPECT_FALSE(c.isBig());
GncInt128 n(2, INT64_C(5501995774277214867), GncInt128::neg);
GncInt128 o(0, INT64_C(2086443244332180413));
c = n / o;
EXPECT_EQ(-11, c);
EXPECT_FALSE(c.isBig());
GncInt128 p(2, INT64_C(5501995774277214867));
GncInt128 q(0, INT64_C(2086443244332180413), GncInt128::neg);
c = p / q;
EXPECT_EQ(-11, c);
EXPECT_FALSE(c.isBig());
GncInt128 r(2, INT64_C(5501995774277214867), GncInt128::neg);
GncInt128 s(0, INT64_C(2086443244332180413), GncInt128::neg);
c = r / s;
EXPECT_EQ(11, c);
EXPECT_FALSE(c.isBig());
});
}
TEST(qofint128_functions, GCD)