pub struct Expectation { /* private fields */ }
Expand description

Expectation type for methods that return a 'static type. This is the type returned by the expect_* methods.

Implementations

Return a constant value from the Expectation

The output type must be Clone. The compiler can’t always infer the proper type to use with this method; you will usually need to specify it explicitly. i.e. return_const(42i32) instead of return_const(42).

Single-threaded version of return_const. This is useful for return types that are not Send.

The output type must be Clone. The compiler can’t always infer the proper type to use with this method; you will usually need to specify it explicitly. i.e. return_const(42i32) instead of return_const(42).

It is a runtime error to call the mock method from a different thread than the one that originally called this method.

Supply an FnOnce closure that will provide the return value for this Expectation. This is useful for return types that aren’t Clone. It will be an error to call this method multiple times.

Single-threaded version of return_once. This is useful for return types that are neither Send nor Clone.

It is a runtime error to call the mock method from a different thread than the one that originally called this method. It is also a runtime error to call the method more than once.

Supply a closure that will provide the return value for this Expectation. The method’s arguments are passed to the closure by value.

Single-threaded version of returning. Can be used when the argument or return type isn’t Send.

It is a runtime error to call the mock method from a different thread than the one that originally called this method.

Add this expectation to a Sequence.

Forbid this expectation from ever being called.

Create a new, default, Expectation

Expect this expectation to be called exactly once. Shortcut for times(1).

Restrict the number of times that that this method may be called.

The argument may be:

  • A fixed number: .times(4)
  • Various types of range:
    • .times(5..10)
    • .times(..10)
    • .times(5..)
    • .times(5..=10)
    • .times(..=10)
  • The wildcard: .times(..)

Set matching crieteria for this Expectation.

The matching predicate can be anything implemening the Predicate trait. Only one matcher can be set per Expectation at a time.

Set a matching function for this Expectation.

This is equivalent to calling with with a function argument, like with(predicate::function(f)).

Single-threaded version of withf. Can be used when the argument type isn’t Send.

Trait Implementations

Returns the “default value” for a type. Read more

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more
TODO: once 1.33.0 is the minimum supported compiler version, remove Any::type_id_compat and use StdAny::type_id instead. https://github.com/rust-lang/rust/issues/27745 Read more
The archived version of the pointer metadata for this type.
Converts some archived metadata to the pointer metadata for itself.
Immutably borrows from an owned value. Read more
Mutably borrows from an owned value. Read more
Deserializes using the given deserializer

Returns the argument unchanged.

Attaches the provided Context to this type, returning a WithContext wrapper. Read more
Attaches the current Context to this type, returning a WithContext wrapper. Read more
Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
Instruments this type with the current Span, returning an Instrumented wrapper. Read more
Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
Instruments this type with the current Span, returning an Instrumented wrapper. Read more

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

The alignment of pointer.
The type for initializers.
Initializes a with the given initializer. Read more
Dereferences the given pointer. Read more
Mutably dereferences the given pointer. Read more
Drops the object pointed to by the given pointer. Read more
The type for metadata in pointers and references to Self.
Should always be Self
The inverse inclusion map: attempts to construct self from the equivalent element of its superset. Read more
Checks if self is actually part of its subset T (and can be converted to it).
Use with care! Same as self.to_subset but without any property checks. Always succeeds.
The inclusion map: converts self to the equivalent element of its superset.
The type returned in the event of a conversion error.
Performs the conversion.
The type returned in the event of a conversion error.
Performs the conversion.
Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more
Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more