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// 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 mod
import (
"io/ioutil"
"os"
"path/filepath"
"testing"
"golang.org/x/tools/gopls/internal/lsp/cache"
"golang.org/x/tools/gopls/internal/lsp/source"
"golang.org/x/tools/gopls/internal/lsp/tests"
"golang.org/x/tools/gopls/internal/span"
"golang.org/x/tools/internal/testenv"
)
func TestMain(m *testing.M) {
testenv.ExitIfSmallMachine()
os.Exit(m.Run())
}
func TestModfileRemainsUnchanged(t *testing.T) {
ctx := tests.Context(t)
session := cache.NewSession(ctx, cache.New(nil, nil), nil)
options := source.DefaultOptions().Clone()
tests.DefaultOptions(options)
options.TempModfile = true
options.Env = map[string]string{"GOPACKAGESDRIVER": "off", "GOROOT": ""}
// Make sure to copy the test directory to a temporary directory so we do not
// modify the test code or add go.sum files when we run the tests.
folder, err := tests.CopyFolderToTempDir(filepath.Join("testdata", "unchanged"))
if err != nil {
t.Fatal(err)
}
defer os.RemoveAll(folder)
before, err := ioutil.ReadFile(filepath.Join(folder, "go.mod"))
if err != nil {
t.Fatal(err)
}
_, _, release, err := session.NewView(ctx, "diagnostics_test", span.URIFromPath(folder), options)
if err != nil {
t.Fatal(err)
}
release()
after, err := ioutil.ReadFile(filepath.Join(folder, "go.mod"))
if err != nil {
t.Fatal(err)
}
if string(before) != string(after) {
t.Errorf("the real go.mod file was changed even when tempModfile=true")
}
}
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