dream_test - v2.1.1

dream_test/matchers/option

Option matchers for dream_test.

These matchers work with Option(a) values and are re-exported through dream_test/matchers.

be_some() unwraps Some(value) so you can keep matching on the inner value. be_none() asserts the option is empty.

Example

Some(42)
|> should
|> be_some()
|> be_equal(42)
|> or_fail_with("expected Some(42)")

Values

be_none

</> 
pub fn be_none(
  value_or_result value_or_result: types.MatchResult(
    option.Option(a),
  ),
) -> types.MatchResult(Nil)

Assert that an Option is None.

Example

None
|> should
|> be_none()
|> or_fail_with("expected None")

Parameters

  • value_or_result: the MatchResult(Option(a)) produced by should (or a previous matcher)

Returns

A MatchResult(Nil) that continues the chain with Nil on success.

be_some

</> 
pub fn be_some(
  value_or_result value_or_result: types.MatchResult(
    option.Option(a),
  ),
) -> types.MatchResult(a)

Assert that an Option is Some and extract its value.

If the assertion passes, the inner value is passed to subsequent matchers. This enables chaining like be_some() |> be_equal(42).

Example

Some(42)
|> should
|> be_some()
|> be_equal(42)
|> or_fail_with("expected Some(42)")

Parameters

  • value_or_result: the MatchResult(Option(a)) produced by should (or a previous matcher)

Returns

A MatchResult(a):

  • On Some(value), the chain continues with the unwrapped value.
  • On None, the chain becomes failed and later matchers are skipped.
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