Enum MailerMode 

pub enum MailerMode {
    SendOk,
    NotConfigured,
    Fail,
    Error(MailError),
}

How a FakeMailer answers.

Error is what makes the failure arms testable at all (issue #236): before it the fake could only ever produce MailError::Upstream("fake mailer failure"), so Invalid { detail } and DomainNotVerified { domain } — the two variants that carry the provider’s own text, and therefore the two that can carry a recipient address — could not be driven from a test. Every arm of a caller’s outcome mapping is now reachable, with the text the caller chooses:

let mailer = FakeMailer::new(MailerMode::Error(MailError::Invalid {
    detail: "to: alice@example.test is suppressed".to_owned(),
}));

Variants

SendOk

Accept and record the message.

NotConfigured

Report that the adapter has no API key or no verified domain.

Fail

A generic upstream failure, for a caller that does not care which.

Error(MailError)

Exactly this error, text and all.

Trait Implementations

impl Clone for MailerMode

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MailerMode

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

Formats the value using the given formatter.

impl Eq for MailerMode

impl PartialEq for MailerMode

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for MailerMode