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: urls_test.go
    path of file: ./repos/juju/environs/imagemetadata
    
    the code of the file until where you have to start completion: // Copyright 2012, 2013, 2014 Canonical Ltd.
// Copyright 2014 Cloudbase Solutions SRL
// Licensed under the AGPLv3, see LICENCE file for details.

package imagemetadata_test

import (
	"fmt"

	jc "github.com/juju/testing/checkers"
	gc "gopkg.in/check.v1"

	"github.com/juju/juju/environs/i
    
func (s *URLsSuite) TestImageMetadataURL(c *gc.C) {
	var imageTests = []struct {
		in          string
		expected    string
		expectedErr error
	}{{
		in:          "",
		expected:    "",
		expectedErr: nil,
	}, {
		in:          "file://foo",
		expected:    "file://foo",
		expectedErr: nil,
	}, {
		in:          "http://foo",
		expected:    "http://foo",
		expectedErr: nil,
	}, {
		in:          "foo",
		expected:    "",
		expectedErr: fmt.Errorf("foo is not an absolute path"),
	}, {
		in:          "/home/foo",
		expected:    "file:///home/foo/images",
		expectedErr: nil,
	}, {
		in:          "/home/foo/images",
		expected:    "file:///home/foo/images",
		expectedErr: nil,
	}}

	for i, t := range imageTests {
		c.Logf("Test %d:", i)

		out, err := imagemetadata.ImageMetadataURL(t.in, "")
		c.Assert(err, gc.DeepEquals, t.expectedErr)
		c.Assert(out, gc.Equals, t.expected)
	}
}