You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: matcher_test.go
    path of file: ./repos/go-git/plumbing/format/gitattributes
    
    the code of the file until where you have to start completion: package gitattributes

import (
	"strings"

	. "gopkg.in/check.v1"
)

func (s *MatcherSuite) TestMatcher_M
    
func (s *MatcherSuite) TestMatcher_Match(c *C) {
	lines := []string{
		"[attr]binary -diff -merge -text",
		"**/middle/v[uo]l?ano binary text eol=crlf",
		"volcano -eol",
		"foobar diff merge text eol=lf foo=bar",
	}

	ma, err := ReadAttributes(strings.NewReader(strings.Join(lines, "\n")), nil, true)
	c.Assert(err, IsNil)

	m := NewMatcher(ma)
	results, matched := m.Match([]string{"head", "middle", "vulkano"}, nil)

	c.Assert(matched, Equals, true)
	c.Assert(results["binary"].IsSet(), Equals, true)
	c.Assert(results["diff"].IsUnset(), Equals, true)
	c.Assert(results["merge"].IsUnset(), Equals, true)
	c.Assert(results["text"].IsSet(), Equals, true)
	c.Assert(results["eol"].Value(), Equals, "crlf")
}