/// <summary>
/// Tests if the value under test contains a given string. May be continued
/// with ".And"
/// </summary>
/// <param name="continuation">Continuation to act on</param>
/// <param name="search">String value to search for</param>
/// <param name="customMessage">Custom message to include in failure messages</param>
/// <returns>IStringContainContinuation onto which you can chain .And</returns>
public static IStringMore Contain(
this ICanAddMatcher <string> continuation,
string search,
Func <string> customMessage
)
{
var result = new StringContainContinuation(continuation);
AddContainsMatcherTo(continuation, search, customMessage, result);
return(result);
}
/// <summary>
/// Continue testing a string for another substring from beyond the end of the last match
/// </summary>
/// <param name="continuation">Continuation to operate on</param>
/// <param name="search">String to search for</param>
/// <param name="customMessageGenerator">Generates a custom message to include in failure messages</param>
/// <returns></returns>
public static IStringMore Then(
this IStringContainContinuation continuation,
string search,
Func <string> customMessageGenerator
)
{
var result = new StringContainContinuation(continuation);
AddContainsMatcherTo(continuation, search, customMessageGenerator, result);
return(result);
}
/// <summary>
/// Provides the .Then(...) extension on already extended string
/// continuations.
/// </summary>
/// <param name="more">Continuation to operate on</param>
/// <param name="search">String to search for</param>
/// <param name="customMessageGenerator">Generates a custom message to add to failure messages</param>
/// <returns></returns>
public static IStringMore Then(
this IStringMore more,
string search,
Func <string> customMessageGenerator
)
{
var canAddMatcher = more as ICanAddMatcher <string>;
var result = new StringContainContinuation(canAddMatcher);
AddContainsMatcherTo(canAddMatcher, search, customMessageGenerator, result);
return(result);
}
/// <summary>
/// Continue testing a string for another substring
/// </summary>
/// <param name="continuation">Existing continuation fron a Contain()</param>
/// <param name="search">string to search for</param>
/// <param name="customMessageGenerator">Generates a custom message to include in failure messages</param>
/// <returns>IStringContainContinuation onto which you can chain .And</returns>
public static IStringMore And(
this IStringMore continuation,
string search,
Func <string> customMessageGenerator
)
{
var result = new StringContainContinuation(continuation);
continuation.SetMetadata(SEARCH_OFFSET, 0); // And will reset the offset -- it's not ordered
AddContainsMatcherTo(continuation, search, customMessageGenerator, result);
return(result);
}
private static void AddContainsMatcherTo(
ICanAddMatcher <string> continuation,
string search,
Func <string> customMessage,
StringContainContinuation next
)
{
continuation.AddMatcher(
s =>
{
var priorOffset = continuation.GetMetadata <int>(SEARCH_OFFSET);
var nextOffset = GetNextOffsetOf(search, s, priorOffset);
next.SetMetadata(SEARCH_OFFSET, nextOffset);
var passed = nextOffset > -1;
return(new MatcherResult(
passed,
() =>
{
var offsetMessage = priorOffset > 0
? $" after index {priorOffset}"
: "";
return FinalMessageFor(
() => new[]
{
"Expected",
s.Stringify(),
$"{passed.AsNot()}to contain",
search.Stringify(),
offsetMessage
},
customMessage
);
}
));
});
}