private void ExecutePositiveAtoiTestCases(IAtoi atoi)
{
Assert.AreEqual(0, atoi.Atoi("0"));
Assert.AreEqual(1, atoi.Atoi("1"));
Assert.AreEqual(123, atoi.Atoi("123"));
Assert.AreEqual(Int32.MaxValue, atoi.Atoi("2147483647"));
Assert.AreEqual(Int32.MinValue, atoi.Atoi("-2147483648"));
Assert.AreEqual(-1, atoi.Atoi("-1"));
Assert.AreEqual(-1, atoi.Atoi(" -1"));
Assert.AreEqual(-1, atoi.Atoi(" -1 "));
Assert.AreEqual(-1, atoi.Atoi("-1 "));
}
private void ExecuteNegativeAtoiTestCases(IAtoi atoi)
{
// null --> ArgumentNullException
TestHelper.AssertThrows(
() =>
{
atoi.Atoi(null);
},
typeof(ArgumentNullException)
);
// empty string --> FormatException
TestHelper.AssertThrows(
() =>
{
atoi.Atoi(string.Empty);
},
typeof(FormatException)
);
// all whitespace string --> FormatException
TestHelper.AssertThrows(
() =>
{
atoi.Atoi(" ");
},
typeof(FormatException)
);
// decimals --> FormatException
TestHelper.AssertThrows(
() =>
{
atoi.Atoi("3.14");
},
typeof(FormatException)
);
// some letters string --> FormatException
TestHelper.AssertThrows(
() =>
{
atoi.Atoi("123abc");
},
typeof(FormatException)
);
// double negative string --> FormatException
TestHelper.AssertThrows(
() =>
{
atoi.Atoi("--17");
},
typeof(FormatException)
);
// out of range for Int32 --> FormatException
TestHelper.AssertThrows(
() =>
{
atoi.Atoi("123456789101112");
},
typeof(FormatException)
);
// out of range for Int32 --> FormatException
TestHelper.AssertThrows(
() =>
{
atoi.Atoi("2147483648");
},
typeof(FormatException)
);
// out of range for Int32 --> FormatException
TestHelper.AssertThrows(
() =>
{
atoi.Atoi("-2147483649");
},
typeof(FormatException)
);
}