verifyContains function
Verify that a string contains a substring.
Example:
verifyContains(output, 'success', 'Output should contain success');
Returns true if the verification passed, false otherwise.
Implementation
bool verifyContains(String actual, String substring, [String? message]) {
if (!actual.contains(substring)) {
final msg = message ?? 'Expected "$actual" to contain "$substring"';
_verificationFailures.add(msg);
return false;
}
return true;
}