Struct xpct::matchers::strings::HavePrefixMatcher

pub struct HavePrefixMatcher<'a> { /* private fields */ }

The matcher for have_prefix.

Implementations

impl<'a> HavePrefixMatcher<'a>

pub fn new(prefix: impl Into<Cow<'a, str>>) -> Self

Create a new HavePrefixMatcher from the expected string prefix.

Trait Implementations

impl<'a> Debug for HavePrefixMatcher<'a>

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

Formats the value using the given formatter.

impl<'a, Actual> Match<Actual> for HavePrefixMatcher<'a>where Actual: AsRef<str>,

type Fail = Mismatch<Cow<'a, str>, Actual>

The failure output that is passed to the formatter.

fn matches(&mut self, actual: &Actual) -> Result<bool>

Returns true if the matcher succeeded or false if it failed.

fn fail(self, actual: Actual) -> Self::Fail

Consumes the “actual” value (the value passed to expect!) and returns a Self::Fail that describes why the matcher failed.