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go/internal/lsp/snippet/snippet_builder_test.go
Muir Manders 3d643c64ae internal/lsp: add literal completion candidates
Add support for literal completion candidates such as "[]int{}" or
"make([]int, 0)". We support both named and unnamed types. I used the
existing type matching logic, so, for example, if the expected type is
an interface, we will suggest literal candidates that implement the
interface.

The literal candidates have a lower score than normal matching
candidates, so they shouldn't be disruptive in cases where you don't
want a literal candidate.

This commit adds support for slice, array, struct, map, and channel
literal candidates since they are pretty similar. Functions will be
supported in a subsequent commit.

I also added support for setting a snippet's final tab stop. This is
useful if you want the cursor to end up somewhere other than the
character after the snippet.

Change-Id: Id3b74260fff4d61703989b422267021b00cec005
Reviewed-on: https://go-review.googlesource.com/c/tools/+/193698
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2019-09-18 17:13:17 +00:00

57 lines
1.2 KiB
Go

// Copyright 2019 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package snippet
import (
"testing"
)
func TestSnippetBuilder(t *testing.T) {
expect := func(expected string, fn func(*Builder)) {
t.Helper()
var b Builder
fn(&b)
if got := b.String(); got != expected {
t.Errorf("got %q, expected %q", got, expected)
}
}
expect("", func(b *Builder) {})
expect(`hi { \} \$ | " , / \\`, func(b *Builder) {
b.WriteText(`hi { } $ | " , / \`)
})
expect("${1:}", func(b *Builder) {
b.WritePlaceholder(nil)
})
expect("hi ${1:there}", func(b *Builder) {
b.WriteText("hi ")
b.WritePlaceholder(func(b *Builder) {
b.WriteText("there")
})
})
expect(`${1:id=${2:{your id\}}}`, func(b *Builder) {
b.WritePlaceholder(func(b *Builder) {
b.WriteText("id=")
b.WritePlaceholder(func(b *Builder) {
b.WriteText("{your id}")
})
})
})
expect(`${1|one,{ \} \$ \| " \, / \\,three|}`, func(b *Builder) {
b.WriteChoice([]string{"one", `{ } $ | " , / \`, "three"})
})
expect("$0 hello", func(b *Builder) {
b.WriteFinalTabstop()
b.WriteText(" hello")
})
}