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|
// Copyright (c) Tailscale Inc & contributors
// SPDX-License-Identifier: BSD-3-Clause
package main
import (
"go/format"
"testing"
"tailscale.com/util/must"
"tailscale.com/util/safediff"
)
func TestFormatFile(t *testing.T) {
tests := []struct{ in, want string }{{
in: `package foobar
import (
"encoding/json"
jsonv2exp "github.com/go-json-experiment/json"
)
func main() {
json.Marshal()
jsonv2exp.Marshal()
{
var json T // deliberately shadow "json" package name
json.Marshal() // should not be re-written
}
}
`,
want: `package foobar
import (
jsonv1 "encoding/json"
jsonv2 "github.com/go-json-experiment/json"
)
func main() {
jsonv1.Marshal()
jsonv2.Marshal()
{
var json T // deliberately shadow "json" package name
json.Marshal() // should not be re-written
}
}
`,
}, {
in: `package foobar
import (
"github.com/go-json-experiment/json"
jsonv2exp "github.com/go-json-experiment/json"
)
func main() {
json.Marshal()
jsonv2exp.Marshal()
}
`,
want: `package foobar
import (
jsonv2 "github.com/go-json-experiment/json"
)
func main() {
jsonv2.Marshal()
jsonv2.Marshal()
}
`,
}, {
in: `package foobar
import "github.com/go-json-experiment/json/v1"
func main() {
json.Marshal()
}
`,
want: `package foobar
import jsonv1 "github.com/go-json-experiment/json/v1"
func main() {
jsonv1.Marshal()
}
`,
}, {
in: `package foobar
import (
"encoding/json"
jsonv1in2 "github.com/go-json-experiment/json/v1"
)
func main() {
json.Marshal()
jsonv1in2.Marshal()
}
`,
want: `package foobar
import (
jsonv1std "encoding/json"
jsonv1 "github.com/go-json-experiment/json/v1"
)
func main() {
jsonv1std.Marshal()
jsonv1.Marshal()
}
`,
}, {
in: `package foobar
import (
"encoding/json"
jsonv1in2 "github.com/go-json-experiment/json/v1"
)
func main() {
json.Marshal()
jsonv1in2.Marshal()
}
`,
want: `package foobar
import (
jsonv1std "encoding/json"
jsonv1 "github.com/go-json-experiment/json/v1"
)
func main() {
jsonv1std.Marshal()
jsonv1.Marshal()
}
`,
}, {
in: `package foobar
import (
"encoding/json"
j2 "encoding/json/v2"
"encoding/json/jsontext"
)
func main() {
json.Marshal()
j2.Marshal()
jsontext.NewEncoder
}
`,
want: `package foobar
import (
jsonv1 "encoding/json"
jsonv2 "github.com/go-json-experiment/json"
"github.com/go-json-experiment/json/jsontext"
)
func main() {
jsonv1.Marshal()
jsonv2.Marshal()
jsontext.NewEncoder
}
`,
}}
for _, tt := range tests {
got := string(must.Get(format.Source([]byte(tt.in))))
got = string(mustFormatFile([]byte(got)))
want := string(must.Get(format.Source([]byte(tt.want))))
if got != want {
diff, _ := safediff.Lines(got, want, -1)
t.Errorf("mismatch (-got +want)\n%s", diff)
t.Error(got)
t.Error(want)
}
}
}
|
