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: bloblang_test.go
    path of file: ./repos/benthos/internal/docs
    
    the code of the file until where you have to start completion: package docs_test

import (
	"testing"

	"github.com/stretchr/testify/require"

	"github.com/benthosdev/benthos/v4/internal/bundle"
	"github.com/benthosdev/benthos/v4/internal/docs"
)

func TestLintBloblangMapping(t *testing.T) {
	type Test struct {
		mapping   string
		line      int
		col       int
		wantLints []docs.Lint
	}
	tests := map[string]Test{
		"mapping": {
			mapping: `this.foo = "bar"`,
			line:    0,
			col:     0,
		},
		"empty mapping": {
			mapping: ``,
			line:    0,
			col:     0,
		},
		"invalid mapping": {
			mapping: `this.foo = #`,
			line:    2,
			col:     4,
			wantLints: []docs.Lint{
				{
					Line:   2,
					Column: 16,
					Level:  docs.LintError,
					Type:   doc
    
func TestLintBloblangField(t *testing.T) {
	type Test struct {
		mapping   string
		line      int
		col       int
		wantLints []docs.Lint
	}
	tests := map[string]Test{
		"static string field": {
			mapping: `foobar`,
			line:    0,
			col:     0,
		},
		"empty field": {
			mapping: ``,
			line:    0,
			col:     0,
		},
		"interpolated field": {
			mapping: `${! json() }`,
			line:    0,
			col:     0,
		},
		"invalid interpolated field": {
			mapping: `${! whoopsie{} }`,
			line:    2,
			col:     4,
			wantLints: []docs.Lint{
				{
					Line:   2,
					Column: 17,
					Level:  docs.LintError,
					Type:   docs.LintBadBloblang,
					What:   `required: expected end of expression, got: {} }`,
				},
			},
		},
		"invalid empty interpolated field": {
			mapping: `${! }`,
			line:    2,
			col:     4,
			wantLints: []docs.Lint{
				{
					Line:   2,
					Column: 9,
					Level:  docs.LintError,
					Type:   docs.LintBadBloblang,
					What:   `required: expected query, got: }`,
				},
			},
		},