Class DiffSuggestionAnalyzer

Namespace

SnapshotAssertions

Assembly

SnapshotAssertions.dll

Scans the rendered diff from a snapshot mismatch for known volatile patterns (GUID, GUID N-format, ISO 8601 timestamp, Unix epoch milliseconds, elapsed ms) and surfaces DiffSuggestion entries recommending applicable built-in scrubbers. Pure: no IO, no allocation beyond the result list and the per-pattern match enumeration.

public static class DiffSuggestionAnalyzer

Inheritance

object

DiffSuggestionAnalyzer

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

object.ToString()

Remarks

The analyzer counts regex matches only on lines that begin with the diff markers + or - (i.e. the differing lines emitted by LineDiffRenderer). Context lines that match between expected and actual are skipped so a pattern that appears in both sides without drift does NOT surface as a suggestion.

The result list is sorted by Count descending, stable secondary ordering by pattern declaration order. Patterns with zero hits are omitted. Callers that want to cap the suggestion list at a maximum count (e.g. the top 3 + rollup pattern used by WriteDescription(TextWriter)) apply that cap on top of the analyzer output.

Methods

Analyze(string)

Scans diff for the five built-in volatile patterns and returns matching scrubber recommendations.

public static IReadOnlyList<DiffSuggestion> Analyze(string diff)

Parameters

diff string

A rendered diff string, typically the Diff property. Lines beginning with + or - are scanned; other lines are skipped. May be empty (yields an empty result list).

Returns

IReadOnlyList<DiffSuggestion>

The list of suggestions, sorted by hit count descending. Empty if the diff is empty, has no differing lines, or contains no known patterns.

Exceptions

ArgumentNullException

diff is null.