public void JoinAllStringsTest_joinEmptyString_ThrowsException()
{
List <string> emptyList = new List <string>();
ExerciseClass c = new ExerciseClass();
Assert.ThrowsException <ArgumentException>(() =>
{
c.JoinAllStrings(emptyList, (s1, s2) => s1 + s2);
});
}
public void JoinAllStringsTest_abcWithUnderscoreFunction_a_b_c()
{
List <string> strings = new List <string>()
{
"a", "b", "c"
};
ExerciseClass c = new ExerciseClass();
string expected = "a_b_c";
string joinfunction(string s1, string s2) => $"{s1}_{s2}";
var result = c.JoinAllStrings(strings, joinfunction);
Assert.AreEqual(expected, result);
}
