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: parse_cargo_lock_test.go
    path of file: ./repos/syft/syft/pkg/cataloger/rust
    
    the code of the file until where you have to start completion: package rust

import (
	"testing"

	"github.com/anchore/syft/syft/artifact"
	"github.com/anchore/syft/syft/file"
	"github.com/anchore/syft/syft/pkg"
	"github.com/anchore/syft/syft/pkg/cataloger/internal/pkgtest"
)

func TestParseCargoLock(t *testing.T) {
	fixture := "test-fixtures/Cargo.lock"
	locations := file.NewLocationSet(file.NewLocation(fixture))
	expectedPkgs := []pkg.Package{
		{
			Name:      "ansi_term",
			Version:   "0.12.1",
			PURL:      "pkg:cargo/ansi_term@0.12.1",
			Locations: locations,
			Language:  pkg.Rust,
			Type:      pkg.RustPkg,
			Licenses:  pkg.NewLicenseSet(),
			Metadata: pkg.RustCargo
    
func TestParseCargoLock(t *testing.T) {
	fixture := "test-fixtures/Cargo.lock"
	locations := file.NewLocationSet(file.NewLocation(fixture))
	expectedPkgs := []pkg.Package{
		{
			Name:      "ansi_term",
			Version:   "0.12.1",
			PURL:      "pkg:cargo/ansi_term@0.12.1",
			Locations: locations,
			Language:  pkg.Rust,
			Type:      pkg.RustPkg,
			Licenses:  pkg.NewLicenseSet(),
			Metadata: pkg.RustCargoLockEntry{
				Name:     "ansi_term",
				Version:  "0.12.1",
				Source:   "registry+https://github.com/rust-lang/crates.io-index",
				Checksum: "d52a9bb7ec0cf484c551830a7ce27bd20d67eac647e1befb56b0be4ee39a55d2",
				Dependencies: []string{
					"winapi",
				},
			},
		},
		{
			Name:      "matches",
			Version:   "0.1.8",
			PURL:      "pkg:cargo/matches@0.1.8",
			Locations: locations,
			Language:  pkg.Rust,
			Type:      pkg.RustPkg,
			Licenses:  pkg.NewLicenseSet(),
			Metadata: pkg.RustCargoLockEntry{
				Name:         "matches",
				Version:      "0.1.8",
				Source:       "registry+https://github.com/rust-lang/crates.io-index",
				Checksum:     "7ffc5c5338469d4d3ea17d269fa8ea3512ad247247c30bd2df69e68309ed0a08",
				Dependencies: []string{},
			},
		},
		{
			Name:      "memchr",
			Version:   "2.3.3",
			PURL:      "pkg:cargo/memchr@2.3.3",
			Locations: locations,
			Language:  pkg.Rust,
			Type:      pkg.RustPkg,
			Licenses:  pkg.NewLicenseSet(),
			Metadata: pkg.RustCargoLockEntry{
				Name:         "memchr",
				Version:      "2.3.3",
				Source:       "registry+https://github.com/rust-lang/crates.io-index",
				Checksum:     "3728d817d99e5ac407411fa471ff9800a778d88a24685968b36824eaf4bee400",
				Dependencies: []string{},
			},
		},
		{
			Name:      "natord",
			Version:   "1.0.9",
			PURL:      "pkg:cargo/natord@1.0.9",
			Locations: locations,
			Language:  pkg.Rust,
			Type:      pkg.RustPkg,
			Licenses:  pkg.NewLicenseSet(),
			Metadata: pkg.RustCargoLockEntry{
				Name:         "natord",
				Version:      "1.0.9",
				Source:       "registry+https://github.com/rust-lang/crates.io-index",
				Checksum:     "308d96db8debc727c3fd9744aac51751243420e46edf401010908da7f8d5e57c",
				Dependencies: []string{},
			},
		},
		{
			Name:      "nom",
			Version:   "4.2.3",
			PURL:      "pkg:cargo/nom@4.2.3",
			Locations: locations,
			Language:  pkg.Rust,
			Type:      pkg.RustPkg,
			Licenses:  pkg.NewLicenseSet(),
			Metadata: pkg.RustCargoLockEntry{
				Name:     "nom",
				Version:  "4.2.3",
				Source:   "registry+https://github.com/rust-lang/crates.io-index",
				Checksum: "2ad2a91a8e869eeb30b9cb3119ae87773a8f4ae617f41b1eb9c154b2905f7bd6",
				Dependencies: []string{
					"memchr",
					"version_check",
				},
			},
		},
		{
			Name:      "unicode-bidi",
			Version:   "0.3.4",
			PURL:      "pkg:cargo/unicode-bidi@0.3.4",
			Locations: locations,
			Language:  pkg.Rust,
			Type:      pkg.RustPkg,
			Licenses:  pkg.NewLicenseSet(),
			Metadata: pkg.RustCargoLockEntry{
				Name:     "unicode-bidi",
				Version:  "0.3.4",
				Source:   "registry+https://github.com/rust-lang/crates.io-index",
				Checksum: "49f2bd0c6468a8230e1db229cff8029217cf623c767ea5d60bfbd42729ea54d5",
				Dependencies: []string{
					"matches",
				},
			},
		},
		{
			Name:      "version_check",
			Version:   "0.1.5",
			PURL:      "pkg:cargo/version_check@0.1.5",
			Locations: locations,
			Language:  pkg.Rust,
			Type:      pkg.RustPkg,
			Licenses:  pkg.NewLicenseSet(),
			Metadata: pkg.RustCargoLockEntry{
				Name:         "version_check",
				Version:      "0.1.5",
				Source:       "registry+https://github.com/rust-lang/crates.io-index",
				Checksum:     "914b1a6776c4c929a602fafd8bc742e06365d4bcbe48c30f9cca5824f70dc9dd",
				Dependencies: []string{},
			},
		},
		{
			Name:      "winapi",
			Version:   "0.3.9",
			PURL:      "pkg:cargo/winapi@0.3.9",
			Locations: locations,
			Language:  pkg.Rust,
			Type:      pkg.RustPkg,
			Licenses:  pkg.NewLicenseSet(),
			Metadata: pkg.RustCargoLockEntry{
				Name:     "winapi",
				Version:  "0.3.9",
				Source:   "registry+https://github.com/rust-lang/crates.io-index",
				Checksum: "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419",
				Dependencies: []string{
					"winapi-i686-pc-windows-gnu",
					"winapi-x86_64-pc-windows-gnu",
				},
			},
		},
		{
			Name:      "winapi-i686-pc-windows-gnu",
			Version:   "0.4.0",
			PURL:      "pkg:cargo/winapi-i686-pc-windows-gnu@0.4.0",
			Locations: locations,
			Language:  pkg.Rust,
			Type:      pkg.RustPkg,
			Licenses:  pkg.NewLicenseSet(),
			Metadata: pkg.RustCargoLockEntry{
				Name:         "winapi-i686-pc-windows-gnu",
				Version:      "0.4.0",
				Source:       "registry+https://github.com/rust-lang/crates.io-index",
				Checksum:     "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6",
				Dependencies: []string{},
			},
		},
		{
			Name:      "winapi-x86_64-pc-windows-gnu",
			Version:   "0.4.0",
			PURL:      "pkg:cargo/winapi-x86_64-pc-windows-gnu@0.4.0",
			Locations: locations,
			Language:  pkg.Rust,
			Type:      pkg.RustPkg,
			Licenses:  pkg.NewLicenseSet(),
			Metadata: pkg.RustCargoLockEntry{
				Name:         "winapi-x86_64-pc-windows-gnu",
				Version:      "0.4.0",
				Source:       "registry+https://github.com/rust-lang/crates.io-index",
				Checksum:     "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f",
				Dependencies: []string{},
			},
		},
	}

	// TODO: no relationships are under test yet
	var expectedRelationships []artifact.Relationship

	pkgtest.TestFileParser(t, fixture, parseCargoLock, expectedPkgs, expectedRelationships)

}