These tests check that postfix completions  when enable usePlaceholders

-- flags --
-ignore_extra_diags

-- settings.json --
{
	"usePlaceholders": true
}

-- go.mod --
module golang.org/lsptests/snippets

go 1.18

-- postfix.go --
package snippets

import (
	"strconv"
)

func _() {
	/* for! */ //@item(postfixFor, "for!", "range over slice by index", "snippet")
	/* forr! */ //@item(postfixForr, "forr!", "range over slice by index and value", "snippet")
	/* range! */ //@item(postfixRange, "range!", "range over slice", "snippet")
	/* var! */ //@item(postfixVar, "var!", "assign to variable", "snippet")

	var foo []int

	foo.fo //@snippet(" //", postfixFor, "for ${1:i} := range foo {\n\t$0\n}")
	foo.forr //@snippet(" //", postfixForr, "for ${1:i}, ${2:v} := range foo {\n\t$0\n}")
	foo.rang //@snippet(" //", postfixRange, "for ${1:i}, ${2:v} := range foo {\n\t$0\n}")
	foo.va //@snippet(" //", postfixVar, "${1:i} := foo")
}

func _() {
	/* for! */ //@item(postfixForMap, "for!", "range over map by key", "snippet")
	/* forr! */ //@item(postfixForrMap, "forr!", "range over map by key and value", "snippet")
	/* range! */ //@item(postfixRangeMap, "range!", "range over map", "snippet")

	var foo map[int]int

	foo.fo //@snippet(" //", postfixFor, "for ${1:k} := range foo {\n\t$0\n}")
	foo.forr //@snippet(" //", postfixForr, "for ${1:k}, ${2:v} := range foo {\n\t$0\n}")
	foo.rang //@snippet(" //", postfixRange, "for ${1:k}, ${2:v} := range foo {\n\t$0\n}")
}

func _() {
	/* for! */ //@item(postfixForChannel, "for!", "range over channel", "snippet")
	/* range! */ //@item(postfixRangeChannel, "range!", "range over channel", "snippet")

	var foo chan int

	foo.fo //@snippet(" //", postfixForChannel, "for ${1:e} := range foo {\n\t$0\n}")
	foo.rang //@snippet(" //", postfixRangeChannel, "for ${1:e} := range foo {\n\t$0\n}")
}

type T struct {
	Name string
}

func _() (string, T, map[string]string, error) {
	/* iferr! */ //@item(postfixIfErr, "iferr!", "check error and return", "snippet")
	/* variferr! */ //@item(postfixVarIfErr, "variferr!", "assign variables and check error", "snippet")
	/* var! */ //@item(postfixVars, "var!", "assign to variables", "snippet")


	var err error
	err.iferr //@snippet(" //", postfixIfErr, "if err != nil {\n\treturn \"\", T{}, nil, ${1:err}\n}\n")
	strconv.Atoi("32").iferr //@snippet(" //", postfixIfErr, "if _, err := strconv.Atoi(\"32\"); err != nil {\n\treturn \"\", T{}, nil, ${1:err}\n}\n")
	strconv.Atoi("32").variferr //@snippet(" //", postfixVarIfErr, "${1:i}, ${2:err} := strconv.Atoi(\"32\")\nif ${2:err} != nil {\n\treturn \"\", T{}, nil, ${3:${2:err}}\n}\n")

	// test function return multiple errors
	var foo func() (error, error)
	foo().iferr //@snippet(" //", postfixIfErr, "if _, err := foo(); err != nil {\n\treturn \"\", T{}, nil, ${1:err}\n}\n")
	foo().variferr //@snippet(" //", postfixVarIfErr, "${1:err2}, ${2:err} := foo()\nif ${2:err} != nil {\n\treturn \"\", T{}, nil, ${3:${2:err}}\n}\n")

	// test function just return error
	var bar func() error
	bar().iferr //@snippet(" //", postfixIfErr, "if err := bar(); err != nil {\n\treturn \"\", T{}, nil, ${1:err}\n}\n")
	bar().variferr //@snippet(" //", postfixVarIfErr, "${1:err2} := bar()\nif ${1:err2} != nil {\n\treturn \"\", T{}, nil, ${2:${1:err2}}\n}\n")
}