Struct ExpectMsg 

pub struct ExpectMsg {
    pub msg_type: String,
    pub fields: Vec<(u32, String)>,
    pub fields_absent: Vec<u32>,
    pub exact: bool,
}

A message the scenario expects the server to send: a MsgType plus required field matches. Volatile fields (SendingTime, BodyLength, CheckSum) are intentionally not matched.

Fields

msg_type: String

Expected MsgType (tag 35).

fields: Vec<(u32, String)>

(tag, value) pairs that must be present (in header or body) with the given value.

fields_absent: Vec<u32>

Tags that must be absent entirely (T015, feature 007 — e.g. confirming a Logon response does NOT echo ResetSeqNumFlag when the inbound Logon never carried it).

exact: bool

T136/T137 (feature 009, NEW-50): when set, check_match additionally fails if the actual message carries any tag beyond fields and ALWAYS_ALLOWED_TAGS — i.e. an unexpected extra field. Opt-in (default false, via ExpectMsg::exact) rather than the default for every ExpectMsg: most of this suite’s ~90 existing scenarios only assert the handful of fields they actually care about, deliberately leaving every other legitimate field (e.g. a Logon response’s own EncryptMethod/HeartBtInt) unlisted — checking exhaustively by default would require rewriting all of them, not just this one item’s fix.

Implementations

impl ExpectMsg

pub fn of(msg_type: &str) -> Self

Expect a message of msg_type with no specific field requirements.

pub fn field(self, tag: u32, value: &str) -> Self

Require a field value.

pub fn without_field(self, tag: u32) -> Self

Require a tag to be entirely absent from the message.

pub fn exact(self) -> Self

Additionally fail if the actual message carries any tag beyond the ones already required via ExpectMsg::field and ALWAYS_ALLOWED_TAGS (T136/T137, NEW-50).

Trait Implementations

impl Clone for ExpectMsg

fn clone(&self) -> ExpectMsg

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ExpectMsg

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.