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go/internal/lsp/cmd/format_test.go
Ian Cottrell d4e30f1c22 internal/lsp: making cmd tests fast and small
This required extensive changes to the "internal" server handling and also to
the way we wait for diagnostics in the "check" verb.
It improves both memory and time by over an order of magnitude, hopefully
allowing us to renable the tests on the builders

Change-Id: I84e84ca4c449e9970ebf1d922a0a2ce0a8a49c72
Reviewed-on: https://go-review.googlesource.com/c/tools/+/175878
Run-TryBot: Ian Cottrell <iancottrell@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2019-05-10 20:14:07 +00:00

67 lines
1.8 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 cmd_test
import (
"context"
"os/exec"
"regexp"
"strings"
"testing"
"golang.org/x/tools/internal/lsp/cmd"
"golang.org/x/tools/internal/lsp/tests"
"golang.org/x/tools/internal/tool"
)
var formatModes = [][]string{
[]string{},
[]string{"-d"},
}
func (r *runner) Format(t *testing.T, data tests.Formats) {
for _, spn := range data {
for _, mode := range formatModes {
tag := "gofmt" + strings.Join(mode, "")
uri := spn.URI()
filename, err := uri.Filename()
if err != nil {
t.Fatal(err)
}
args := append(mode, filename)
expect := string(r.data.Golden(tag, filename, func() ([]byte, error) {
cmd := exec.Command("gofmt", args...)
contents, _ := cmd.Output() // ignore error, sometimes we have intentionally ungofmt-able files
contents = []byte(r.normalizePaths(fixFileHeader(string(contents))))
return contents, nil
}))
if expect == "" {
//TODO: our error handling differs, for now just skip unformattable files
continue
}
app := &cmd.Application{}
app.Config = r.data.Config
got := captureStdOut(t, func() {
tool.Main(context.Background(), app, append([]string{"-remote=internal", "format"}, args...))
})
got = r.normalizePaths(got)
// check the first two lines are the expected file header
if expect != got {
t.Errorf("format failed with %#v expected:\n%s\ngot:\n%s", args, expect, got)
}
}
}
}
var unifiedHeader = regexp.MustCompile(`^diff -u.*\n(---\s+\S+\.go\.orig)\s+[\d-:. ]+(\n\+\+\+\s+\S+\.go)\s+[\d-:. ]+(\n@@)`)
func fixFileHeader(s string) string {
match := unifiedHeader.FindStringSubmatch(s)
if match == nil {
return s
}
return strings.Join(append(match[1:], s[len(match[0]):]), "")
}