contains method

void contains(
  1. Pattern pattern
)

Expects that the value contains pattern according to String.contains;

Implementation

void contains(Pattern pattern) {
  context.expect(() => prefixFirst('contains ', literal(pattern)), (actual) {
    if (actual.contains(pattern)) return null;
    return Rejection(
      which: prefixFirst('Does not contain ', literal(pattern)),
    );
  });
}