public void SeparatorsCanBeEmpty()
{
Assert.AreEqual("1,2", StringJoinExtensions.JoinAnd(
new[] { "1", "2" }, "", ","), "separator is empty");
Assert.AreEqual("12", StringJoinExtensions.JoinAnd(
new[] { "1", "2" }, ",", ""), "last separator is empty");
Assert.AreEqual("12", StringJoinExtensions.JoinAnd(
new[] { "1", "2" }, "", ""), "both separators are empty");
}
public void ThrowsIfArgumentNulls()
{
string[] values = default;
Assert.ThrowsException <ArgumentNullException>(() =>
StringJoinExtensions.JoinAnd(values, ", ", " and "));
Assert.ThrowsException <ArgumentNullException>(() =>
StringJoinExtensions.JoinAnd(new[] { "1", "2" }, null,
" and "));
}
public void ValuesCanBeNullOrEmpty()
{
Assert.AreEqual("-2", StringJoinExtensions.JoinAnd(
new[] { "", "2" }, "+", "-"), "1st value is empty");
Assert.AreEqual("1-", StringJoinExtensions.JoinAnd(
new[] { "1", "" }, "+", "-"), "2nd value is empty");
Assert.AreEqual("1+2-", StringJoinExtensions.JoinAnd(
new[] { "1", "2", "" }, "+", "-"), "3rd value is empty");
Assert.AreEqual("-2", StringJoinExtensions.JoinAnd(
new[] { null, "2" }, "+", "-"), "1st value is null");
Assert.AreEqual("1-", StringJoinExtensions.JoinAnd(
new[] { "1", null }, "+", "-"), "2nd value is null");
Assert.AreEqual("1+2-", StringJoinExtensions.JoinAnd(
new[] { "1", "2", null }, "+", "-"), "3rd value is null");
}
