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: package_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"

	"
    
func Test_packageURL(t *testing.T) {
	type args struct {
		name    string
		version string
	}
	tests := []struct {
		name string
		args args
		want string
	}{
		{
			name: "go case",
			args: args{
				name:    "name",
				version: "v0.1.0",
			},
			want: "pkg:cargo/name@v0.1.0",
		},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			assert.Equal(t, tt.want, packageURL(tt.args.name, tt.args.version))
		})
	}
}