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: json_parser_test.go
    path of file: ./repos/esbuild/internal/js_parser
    
    the code of the file until where you have to start completion: package js_parser

import (
	"fmt"
	"testing"

	"github.com/evanw/esbuild/internal/ast"
	"github.com/evanw/esbuild/internal/js_ast"
	"github.com/evanw/esbuild/internal/js_printer"
	"github.com/evanw/esbuild/internal/logger"
	"github.com/evanw/esbuild/internal/test"
)

func expectParseErrorJSON(t *testing.T, contents string, expected string) {
	t.Helper()
	t.Run(contents, func(t *testing.T) {
		t.Helper()
		log := logger.NewDeferLog(logger.DeferLogNoVerboseOrDebug, nil)
		ParseJSON(log, test.SourceForTest(contents), JSONOptions{})
		msgs := log.Done()
		text := ""
		for _, msg := range msgs {
			text += msg.String(logger.OutputOptions{}, logger.TerminalInfo{})
		}
		test.AssertEqualWithDiff(t, text, expected)
	})
}

// Note: The input is parsed as JSON but printed as JS. This means
    
func expectPrintedJSONWithWarning(t *testing.T, contents string, warning string, expected string) {
	t.Helper()
	t.Run(contents, func(t *testing.T) {
		t.Helper()
		log := logger.NewDeferLog(logger.DeferLogNoVerboseOrDebug, nil)
		expr, ok := ParseJSON(log, test.SourceForTest(contents), JSONOptions{})
		msgs := log.Done()
		text := ""
		for _, msg := range msgs {
			text += msg.String(logger.OutputOptions{}, logger.TerminalInfo{})
		}
		test.AssertEqualWithDiff(t, text, warning)
		if !ok {
			t.Fatal("Parse error")
		}

		// Insert this expression into a statement
		tree := js_ast.AST{
			Parts: []js_ast.Part{{Stmts: []js_ast.Stmt{{Data: &js_ast.SExpr{Value: expr}}}}},
		}

		js := js_printer.Print(tree, ast.SymbolMap{}, nil, js_printer.Options{
			MinifyWhitespace: true,
		}).JS

		// Remove the trailing semicolon
		if n := len(js); n > 1 && js[n-1] == ';' {
			js = js[:n-1]
		}

		test.AssertEqualWithDiff(t, string(js), expected)
	})
}