gotools/internal/expect/expect.go

type Note …

type ReadFile …

// MatchBefore attempts to match a pattern in the line before the supplied pos.
// It uses the FileSet and the ReadFile to work out the contents of the line
// that end is part of, and then matches the pattern against the content of the
// start of that line up to the supplied position.
// The pattern may be either a simple string, []byte or a *regexp.Regexp.
// MatchBefore returns the range of the line that matched the pattern, and
// invalid positions if there was no match, or an error if the line could not be
// found.
func MatchBefore(fset *token.FileSet, readFile ReadFile, end token.Pos, pattern interface{ … }