Enum SnapshotFailure 

pub enum SnapshotFailure {
    Missing {
        path: PathBuf,
    },
    Mismatch {
        path: PathBuf,
        expected: String,
        actual: String,
    },
    Io {
        path: PathBuf,
        action: &'static str,
        source: Error,
    },
}

Why a snapshot assertion did not pass.

This is the structured form: test-better-matchers turns it into a TestError (a Mismatch becomes an expected/actual payload with a diff), but the failure is described here so the crate is usable on its own.

Variants

Missing

No snapshot file exists and the mode was Compare.

Fields

path: PathBuf

Where the snapshot file was expected.

Mismatch

The snapshot file exists but its contents differ from actual.

Fields

path: PathBuf

The snapshot file that was compared against.

expected: String

The stored snapshot (the file’s contents).

actual: String

The value under test.

Io

Resolving the snapshot directory, reading the file, or writing it failed.

Fields

path: PathBuf

The snapshot file (or directory) the operation concerned.

action: &'static str

A short description of what was being attempted, e.g. "reading the snapshot file".

source: Error

The underlying I/O error.

Trait Implementations

impl Debug for SnapshotFailure

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

Formats the value using the given formatter.

impl Display for SnapshotFailure

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

Formats the value using the given formatter.

impl Error for SnapshotFailure

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.