blob: 6c358ac0c96a546f5152266cd711939da2270210 [file] [log] [blame]
// Copyright 2018 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 lsp
import (
"bytes"
"context"
"fmt"
"go/token"
"os/exec"
"path/filepath"
"sort"
"strings"
"testing"
"golang.org/x/tools/go/packages/packagestest"
"golang.org/x/tools/internal/lsp/cache"
"golang.org/x/tools/internal/lsp/diff"
"golang.org/x/tools/internal/lsp/protocol"
"golang.org/x/tools/internal/lsp/source"
"golang.org/x/tools/internal/lsp/tests"
"golang.org/x/tools/internal/lsp/xlog"
"golang.org/x/tools/internal/span"
)
func TestLSP(t *testing.T) {
packagestest.TestAll(t, testLSP)
}
type runner struct {
server *Server
data *tests.Data
}
const viewName = "lsp_test"
func testLSP(t *testing.T, exporter packagestest.Exporter) {
data := tests.Load(t, exporter, "testdata")
defer data.Exported.Cleanup()
log := xlog.New(xlog.StdSink{})
cache := cache.New()
session := cache.NewSession(log)
view := session.NewView(viewName, span.FileURI(data.Config.Dir))
view.SetEnv(data.Config.Env)
for filename, content := range data.Config.Overlay {
session.SetOverlay(span.FileURI(filename), content)
}
r := &runner{
server: &Server{
session: session,
undelivered: make(map[span.URI][]source.Diagnostic),
supportedCodeActions: map[protocol.CodeActionKind]bool{
protocol.SourceOrganizeImports: true,
protocol.QuickFix: true,
},
hoverKind: source.SynopsisDocumentation,
},
data: data,
}
tests.Run(t, r, data)
}
// TODO: Actually test the LSP diagnostics function in this test.
func (r *runner) Diagnostics(t *testing.T, data tests.Diagnostics) {
v := r.server.session.View(viewName)
for uri, want := range data {
f, err := v.GetFile(context.Background(), uri)
if err != nil {
t.Fatalf("no file for %s: %v", f, err)
}
gof, ok := f.(source.GoFile)
if !ok {
t.Fatalf("%s is not a Go file: %v", uri, err)
}
results, err := source.Diagnostics(context.Background(), v, gof, nil)
if err != nil {
t.Fatal(err)
}
got := results[uri]
if diff := diffDiagnostics(uri, want, got); diff != "" {
t.Error(diff)
}
}
}
func sortDiagnostics(d []source.Diagnostic) {
sort.Slice(d, func(i int, j int) bool {
if r := span.Compare(d[i].Span, d[j].Span); r != 0 {
return r < 0
}
return d[i].Message < d[j].Message
})
}
// diffDiagnostics prints the diff between expected and actual diagnostics test
// results.
func diffDiagnostics(uri span.URI, want, got []source.Diagnostic) string {
sortDiagnostics(want)
sortDiagnostics(got)
if len(got) != len(want) {
return summarizeDiagnostics(-1, want, got, "different lengths got %v want %v", len(got), len(want))
}
for i, w := range want {
g := got[i]
if w.Message != g.Message {
return summarizeDiagnostics(i, want, got, "incorrect Message got %v want %v", g.Message, w.Message)
}
if span.ComparePoint(w.Start(), g.Start()) != 0 {
return summarizeDiagnostics(i, want, got, "incorrect Start got %v want %v", g.Start(), w.Start())
}
// Special case for diagnostics on parse errors.
if strings.Contains(string(uri), "noparse") {
if span.ComparePoint(g.Start(), g.End()) != 0 || span.ComparePoint(w.Start(), g.End()) != 0 {
return summarizeDiagnostics(i, want, got, "incorrect End got %v want %v", g.End(), w.Start())
}
} else if !g.IsPoint() { // Accept any 'want' range if the diagnostic returns a zero-length range.
if span.ComparePoint(w.End(), g.End()) != 0 {
return summarizeDiagnostics(i, want, got, "incorrect End got %v want %v", g.End(), w.End())
}
}
if w.Severity != g.Severity {
return summarizeDiagnostics(i, want, got, "incorrect Severity got %v want %v", g.Severity, w.Severity)
}
if w.Source != g.Source {
return summarizeDiagnostics(i, want, got, "incorrect Source got %v want %v", g.Source, w.Source)
}
}
return ""
}
func summarizeDiagnostics(i int, want []source.Diagnostic, got []source.Diagnostic, reason string, args ...interface{}) string {
msg := &bytes.Buffer{}
fmt.Fprint(msg, "diagnostics failed")
if i >= 0 {
fmt.Fprintf(msg, " at %d", i)
}
fmt.Fprint(msg, " because of ")
fmt.Fprintf(msg, reason, args...)
fmt.Fprint(msg, ":\nexpected:\n")
for _, d := range want {
fmt.Fprintf(msg, " %v: %s\n", d.Span, d.Message)
}
fmt.Fprintf(msg, "got:\n")
for _, d := range got {
fmt.Fprintf(msg, " %v: %s\n", d.Span, d.Message)
}
return msg.String()
}
func (r *runner) Completion(t *testing.T, data tests.Completions, snippets tests.CompletionSnippets, items tests.CompletionItems) {
defer func() { r.server.useDeepCompletions = false }()
for src, itemList := range data {
var want []source.CompletionItem
for _, pos := range itemList {
want = append(want, *items[pos])
}
r.server.useDeepCompletions = strings.Contains(string(src.URI()), "deepcomplete")
list := r.runCompletion(t, src)
wantBuiltins := strings.Contains(string(src.URI()), "builtins")
var got []protocol.CompletionItem
for _, item := range list.Items {
if !wantBuiltins && isBuiltin(item) {
continue
}
got = append(got, item)
}
if diff := diffCompletionItems(t, src, want, got); diff != "" {
t.Errorf("%s: %s", src, diff)
}
}
origPlaceHolders := r.server.usePlaceholders
origTextFormat := r.server.insertTextFormat
defer func() {
r.server.usePlaceholders = origPlaceHolders
r.server.insertTextFormat = origTextFormat
}()
r.server.insertTextFormat = protocol.SnippetTextFormat
for _, usePlaceholders := range []bool{true, false} {
r.server.usePlaceholders = usePlaceholders
for src, want := range snippets {
r.server.useDeepCompletions = strings.Contains(string(src.URI()), "deepcomplete")
list := r.runCompletion(t, src)
wantItem := items[want.CompletionItem]
var got *protocol.CompletionItem
for _, item := range list.Items {
if item.Label == wantItem.Label {
got = &item
break
}
}
if got == nil {
t.Fatalf("%s: couldn't find completion matching %q", src.URI(), wantItem.Label)
}
var expected string
if usePlaceholders {
expected = want.PlaceholderSnippet
} else {
expected = want.PlainSnippet
}
if expected != got.TextEdit.NewText {
t.Errorf("%s: expected snippet %q, got %q", src, expected, got.TextEdit.NewText)
}
}
}
}
func (r *runner) runCompletion(t *testing.T, src span.Span) *protocol.CompletionList {
t.Helper()
list, err := r.server.Completion(context.Background(), &protocol.CompletionParams{
TextDocumentPositionParams: protocol.TextDocumentPositionParams{
TextDocument: protocol.TextDocumentIdentifier{
URI: protocol.NewURI(src.URI()),
},
Position: protocol.Position{
Line: float64(src.Start().Line() - 1),
Character: float64(src.Start().Column() - 1),
},
},
})
if err != nil {
t.Fatal(err)
}
return list
}
func isBuiltin(item protocol.CompletionItem) bool {
// If a type has no detail, it is a builtin type.
if item.Detail == "" && item.Kind == protocol.TypeParameterCompletion {
return true
}
// Remaining builtin constants, variables, interfaces, and functions.
trimmed := item.Label
if i := strings.Index(trimmed, "("); i >= 0 {
trimmed = trimmed[:i]
}
switch trimmed {
case "append", "cap", "close", "complex", "copy", "delete",
"error", "false", "imag", "iota", "len", "make", "new",
"nil", "panic", "print", "println", "real", "recover", "true":
return true
}
return false
}
// diffCompletionItems prints the diff between expected and actual completion
// test results.
func diffCompletionItems(t *testing.T, spn span.Span, want []source.CompletionItem, got []protocol.CompletionItem) string {
if len(got) != len(want) {
return summarizeCompletionItems(-1, want, got, "different lengths got %v want %v", len(got), len(want))
}
for i, w := range want {
g := got[i]
if w.Label != g.Label {
return summarizeCompletionItems(i, want, got, "incorrect Label got %v want %v", g.Label, w.Label)
}
if w.Detail != g.Detail {
return summarizeCompletionItems(i, want, got, "incorrect Detail got %v want %v", g.Detail, w.Detail)
}
if wkind := toProtocolCompletionItemKind(w.Kind); wkind != g.Kind {
return summarizeCompletionItems(i, want, got, "incorrect Kind got %v want %v", g.Kind, wkind)
}
}
return ""
}
func summarizeCompletionItems(i int, want []source.CompletionItem, got []protocol.CompletionItem, reason string, args ...interface{}) string {
msg := &bytes.Buffer{}
fmt.Fprint(msg, "completion failed")
if i >= 0 {
fmt.Fprintf(msg, " at %d", i)
}
fmt.Fprint(msg, " because of ")
fmt.Fprintf(msg, reason, args...)
fmt.Fprint(msg, ":\nexpected:\n")
for _, d := range want {
fmt.Fprintf(msg, " %v\n", d)
}
fmt.Fprintf(msg, "got:\n")
for _, d := range got {
fmt.Fprintf(msg, " %v\n", d)
}
return msg.String()
}
func (r *runner) Format(t *testing.T, data tests.Formats) {
ctx := context.Background()
for _, spn := range data {
uri := spn.URI()
filename := uri.Filename()
gofmted := string(r.data.Golden("gofmt", filename, func() ([]byte, error) {
cmd := exec.Command("gofmt", filename)
out, _ := cmd.Output() // ignore error, sometimes we have intentionally ungofmt-able files
return out, nil
}))
edits, err := r.server.Formatting(context.Background(), &protocol.DocumentFormattingParams{
TextDocument: protocol.TextDocumentIdentifier{
URI: protocol.NewURI(uri),
},
})
if err != nil {
if gofmted != "" {
t.Error(err)
}
continue
}
_, m, err := getSourceFile(ctx, r.server.session.ViewOf(uri), uri)
if err != nil {
t.Error(err)
}
sedits, err := FromProtocolEdits(m, edits)
if err != nil {
t.Error(err)
}
ops := source.EditsToDiff(sedits)
got := strings.Join(diff.ApplyEdits(diff.SplitLines(string(m.Content)), ops), "")
if gofmted != got {
t.Errorf("format failed for %s, expected:\n%v\ngot:\n%v", filename, gofmted, got)
}
}
}
func (r *runner) Import(t *testing.T, data tests.Imports) {
ctx := context.Background()
for _, spn := range data {
uri := spn.URI()
filename := uri.Filename()
goimported := string(r.data.Golden("goimports", filename, func() ([]byte, error) {
cmd := exec.Command("goimports", filename)
out, _ := cmd.Output() // ignore error, sometimes we have intentionally ungofmt-able files
return out, nil
}))
actions, err := r.server.CodeAction(context.Background(), &protocol.CodeActionParams{
TextDocument: protocol.TextDocumentIdentifier{
URI: protocol.NewURI(uri),
},
})
if err != nil {
if goimported != "" {
t.Error(err)
}
continue
}
_, m, err := getSourceFile(ctx, r.server.session.ViewOf(uri), uri)
if err != nil {
t.Error(err)
}
var edits []protocol.TextEdit
for _, a := range actions {
if a.Title == "Organize Imports" {
edits = (*a.Edit.Changes)[string(uri)]
}
}
sedits, err := FromProtocolEdits(m, edits)
if err != nil {
t.Error(err)
}
ops := source.EditsToDiff(sedits)
got := strings.Join(diff.ApplyEdits(diff.SplitLines(string(m.Content)), ops), "")
if goimported != got {
t.Errorf("import failed for %s, expected:\n%v\ngot:\n%v", filename, goimported, got)
}
}
}
func (r *runner) Definition(t *testing.T, data tests.Definitions) {
for _, d := range data {
sm, err := r.mapper(d.Src.URI())
if err != nil {
t.Fatal(err)
}
loc, err := sm.Location(d.Src)
if err != nil {
t.Fatalf("failed for %v: %v", d.Src, err)
}
params := &protocol.TextDocumentPositionParams{
TextDocument: protocol.TextDocumentIdentifier{URI: loc.URI},
Position: loc.Range.Start,
}
var locs []protocol.Location
var hover *protocol.Hover
if d.IsType {
locs, err = r.server.TypeDefinition(context.Background(), params)
} else {
locs, err = r.server.Definition(context.Background(), params)
if err != nil {
t.Fatalf("failed for %v: %v", d.Src, err)
}
hover, err = r.server.Hover(context.Background(), params)
}
if err != nil {
t.Fatalf("failed for %v: %v", d.Src, err)
}
if len(locs) != 1 {
t.Errorf("got %d locations for definition, expected 1", len(locs))
}
if hover != nil {
tag := fmt.Sprintf("%s-hover", d.Name)
expectHover := string(r.data.Golden(tag, d.Src.URI().Filename(), func() ([]byte, error) {
return []byte(hover.Contents.Value), nil
}))
if hover.Contents.Value != expectHover {
t.Errorf("for %v got %q want %q", d.Src, hover.Contents.Value, expectHover)
}
} else if !d.OnlyHover {
locURI := span.NewURI(locs[0].URI)
lm, err := r.mapper(locURI)
if err != nil {
t.Fatal(err)
}
if def, err := lm.Span(locs[0]); err != nil {
t.Fatalf("failed for %v: %v", locs[0], err)
} else if def != d.Def {
t.Errorf("for %v got %v want %v", d.Src, def, d.Def)
}
} else {
t.Errorf("no tests ran for %s", d.Src.URI())
}
}
}
func (r *runner) Highlight(t *testing.T, data tests.Highlights) {
for name, locations := range data {
m, err := r.mapper(locations[0].URI())
if err != nil {
t.Fatal(err)
}
loc, err := m.Location(locations[0])
if err != nil {
t.Fatalf("failed for %v: %v", locations[0], err)
}
params := &protocol.TextDocumentPositionParams{
TextDocument: protocol.TextDocumentIdentifier{URI: loc.URI},
Position: loc.Range.Start,
}
highlights, err := r.server.DocumentHighlight(context.Background(), params)
if err != nil {
t.Fatal(err)
}
if len(highlights) != len(locations) {
t.Fatalf("got %d highlights for %s, expected %d", len(highlights), name, len(locations))
}
for i := range highlights {
if h, err := m.RangeSpan(highlights[i].Range); err != nil {
t.Fatalf("failed for %v: %v", highlights[i], err)
} else if h != locations[i] {
t.Errorf("want %v, got %v\n", locations[i], h)
}
}
}
}
func (r *runner) Reference(t *testing.T, data tests.References) {
for src, itemList := range data {
sm, err := r.mapper(src.URI())
if err != nil {
t.Fatal(err)
}
loc, err := sm.Location(src)
if err != nil {
t.Fatalf("failed for %v: %v", src, err)
}
want := make(map[protocol.Location]bool)
for _, pos := range itemList {
m, err := r.mapper(pos.URI())
if err != nil {
t.Fatal(err)
}
loc, err := m.Location(pos)
if err != nil {
t.Fatalf("failed for %v: %v", src, err)
}
want[loc] = true
}
params := &protocol.ReferenceParams{
TextDocumentPositionParams: protocol.TextDocumentPositionParams{
TextDocument: protocol.TextDocumentIdentifier{URI: loc.URI},
Position: loc.Range.Start,
},
}
got, err := r.server.References(context.Background(), params)
if err != nil {
t.Fatalf("failed for %v: %v", src, err)
}
if len(got) != len(want) {
t.Errorf("references failed: different lengths got %v want %v", len(got), len(want))
}
for _, loc := range got {
if !want[loc] {
t.Errorf("references failed: incorrect references got %v want %v", loc, want)
}
}
}
}
func (r *runner) Rename(t *testing.T, data tests.Renames) {
ctx := context.Background()
for spn, newText := range data {
tag := fmt.Sprintf("%s-rename", newText)
uri := spn.URI()
filename := uri.Filename()
sm, err := r.mapper(uri)
if err != nil {
t.Fatal(err)
}
loc, err := sm.Location(spn)
if err != nil {
t.Fatalf("failed for %v: %v", spn, err)
}
workspaceEdits, err := r.server.Rename(ctx, &protocol.RenameParams{
TextDocument: protocol.TextDocumentIdentifier{
URI: protocol.NewURI(uri),
},
Position: loc.Range.Start,
NewName: newText,
})
if err != nil {
renamed := string(r.data.Golden(tag, filename, func() ([]byte, error) {
return []byte(err.Error()), nil
}))
if err.Error() != renamed {
t.Errorf("rename failed for %s, expected:\n%v\ngot:\n%v\n", newText, renamed, err)
}
continue
}
var res []string
for uri, edits := range *workspaceEdits.Changes {
spnURI := span.URI(uri)
_, m, err := getSourceFile(ctx, r.server.session.ViewOf(span.URI(spnURI)), spnURI)
if err != nil {
t.Error(err)
}
sedits, err := FromProtocolEdits(m, edits)
if err != nil {
t.Error(err)
}
filename := filepath.Base(m.URI.Filename())
contents := applyEdits(string(m.Content), sedits)
res = append(res, fmt.Sprintf("%s:\n%s", filename, contents))
}
// Sort on filename
sort.Strings(res)
var got string
for i, val := range res {
if i != 0 {
got += "\n"
}
got += val
}
renamed := string(r.data.Golden(tag, filename, func() ([]byte, error) {
return []byte(got), nil
}))
if renamed != got {
t.Errorf("rename failed for %s, expected:\n%v\ngot:\n%v", newText, renamed, got)
}
}
}
func applyEdits(contents string, edits []source.TextEdit) string {
res := contents
sortSourceTextEdits(edits)
// Apply the edits from the end of the file forward
// to preserve the offsets
for i := len(edits) - 1; i >= 0; i-- {
edit := edits[i]
start := edit.Span.Start().Offset()
end := edit.Span.End().Offset()
tmp := res[0:start] + edit.NewText
res = tmp + res[end:]
}
return res
}
func sortSourceTextEdits(d []source.TextEdit) {
sort.Slice(d, func(i int, j int) bool {
if r := span.Compare(d[i].Span, d[j].Span); r != 0 {
return r < 0
}
return d[i].NewText < d[j].NewText
})
}
func (r *runner) Symbol(t *testing.T, data tests.Symbols) {
for uri, expectedSymbols := range data {
params := &protocol.DocumentSymbolParams{
TextDocument: protocol.TextDocumentIdentifier{
URI: string(uri),
},
}
symbols, err := r.server.DocumentSymbol(context.Background(), params)
if err != nil {
t.Fatal(err)
}
if len(symbols) != len(expectedSymbols) {
t.Errorf("want %d top-level symbols in %v, got %d", len(expectedSymbols), uri, len(symbols))
continue
}
if diff := r.diffSymbols(t, uri, expectedSymbols, symbols); diff != "" {
t.Error(diff)
}
}
}
func (r *runner) diffSymbols(t *testing.T, uri span.URI, want []source.Symbol, got []protocol.DocumentSymbol) string {
sort.Slice(want, func(i, j int) bool { return want[i].Name < want[j].Name })
sort.Slice(got, func(i, j int) bool { return got[i].Name < got[j].Name })
m, err := r.mapper(uri)
if err != nil {
t.Fatal(err)
}
if len(got) != len(want) {
return summarizeSymbols(-1, want, got, "different lengths got %v want %v", len(got), len(want))
}
for i, w := range want {
g := got[i]
if w.Name != g.Name {
return summarizeSymbols(i, want, got, "incorrect name got %v want %v", g.Name, w.Name)
}
if wkind := toProtocolSymbolKind(w.Kind); wkind != g.Kind {
return summarizeSymbols(i, want, got, "incorrect kind got %v want %v", g.Kind, wkind)
}
spn, err := m.RangeSpan(g.SelectionRange)
if err != nil {
return summarizeSymbols(i, want, got, "%v", err)
}
if w.SelectionSpan != spn {
return summarizeSymbols(i, want, got, "incorrect span got %v want %v", spn, w.SelectionSpan)
}
if msg := r.diffSymbols(t, uri, w.Children, g.Children); msg != "" {
return fmt.Sprintf("children of %s: %s", w.Name, msg)
}
}
return ""
}
func summarizeSymbols(i int, want []source.Symbol, got []protocol.DocumentSymbol, reason string, args ...interface{}) string {
msg := &bytes.Buffer{}
fmt.Fprint(msg, "document symbols failed")
if i >= 0 {
fmt.Fprintf(msg, " at %d", i)
}
fmt.Fprint(msg, " because of ")
fmt.Fprintf(msg, reason, args...)
fmt.Fprint(msg, ":\nexpected:\n")
for _, s := range want {
fmt.Fprintf(msg, " %v %v %v\n", s.Name, s.Kind, s.SelectionSpan)
}
fmt.Fprintf(msg, "got:\n")
for _, s := range got {
fmt.Fprintf(msg, " %v %v %v\n", s.Name, s.Kind, s.SelectionRange)
}
return msg.String()
}
func (r *runner) SignatureHelp(t *testing.T, data tests.Signatures) {
for spn, expectedSignatures := range data {
m, err := r.mapper(spn.URI())
if err != nil {
t.Fatal(err)
}
loc, err := m.Location(spn)
if err != nil {
t.Fatalf("failed for %v: %v", loc, err)
}
gotSignatures, err := r.server.SignatureHelp(context.Background(), &protocol.TextDocumentPositionParams{
TextDocument: protocol.TextDocumentIdentifier{
URI: protocol.NewURI(spn.URI()),
},
Position: loc.Range.Start,
})
if err != nil {
// Only fail if we got an error we did not expect.
if expectedSignatures != nil {
t.Fatal(err)
}
continue
}
if expectedSignatures == nil {
if gotSignatures != nil {
t.Errorf("expected no signature, got %v", gotSignatures)
}
continue
}
if diff := diffSignatures(spn, expectedSignatures, gotSignatures); diff != "" {
t.Error(diff)
}
}
}
func diffSignatures(spn span.Span, want *source.SignatureInformation, got *protocol.SignatureHelp) string {
decorate := func(f string, args ...interface{}) string {
return fmt.Sprintf("Invalid signature at %s: %s", spn, fmt.Sprintf(f, args...))
}
if len(got.Signatures) != 1 {
return decorate("wanted 1 signature, got %d", len(got.Signatures))
}
if got.ActiveSignature != 0 {
return decorate("wanted active signature of 0, got %f", got.ActiveSignature)
}
if want.ActiveParameter != int(got.ActiveParameter) {
return decorate("wanted active parameter of %d, got %f", want.ActiveParameter, got.ActiveParameter)
}
gotSig := got.Signatures[int(got.ActiveSignature)]
if want.Label != gotSig.Label {
return decorate("wanted label %q, got %q", want.Label, gotSig.Label)
}
var paramParts []string
for _, p := range gotSig.Parameters {
paramParts = append(paramParts, p.Label)
}
paramsStr := strings.Join(paramParts, ", ")
if !strings.Contains(gotSig.Label, paramsStr) {
return decorate("expected signature %q to contain params %q", gotSig.Label, paramsStr)
}
return ""
}
func (r *runner) Link(t *testing.T, data tests.Links) {
for uri, wantLinks := range data {
m, err := r.mapper(uri)
if err != nil {
t.Fatal(err)
}
gotLinks, err := r.server.DocumentLink(context.Background(), &protocol.DocumentLinkParams{
TextDocument: protocol.TextDocumentIdentifier{
URI: protocol.NewURI(uri),
},
})
if err != nil {
t.Fatal(err)
}
links := make(map[span.Span]string, len(wantLinks))
for _, link := range wantLinks {
links[link.Src] = link.Target
}
for _, link := range gotLinks {
spn, err := m.RangeSpan(link.Range)
if err != nil {
t.Fatal(err)
}
if target, ok := links[spn]; ok {
delete(links, spn)
if target != link.Target {
t.Errorf("for %v want %v, got %v\n", spn, link.Target, target)
}
} else {
t.Errorf("unexpected link %v:%v\n", spn, link.Target)
}
}
for spn, target := range links {
t.Errorf("missing link %v:%v\n", spn, target)
}
}
}
func (r *runner) mapper(uri span.URI) (*protocol.ColumnMapper, error) {
filename := uri.Filename()
fset := r.data.Exported.ExpectFileSet
var f *token.File
fset.Iterate(func(check *token.File) bool {
if check.Name() == filename {
f = check
return false
}
return true
})
if f == nil {
return nil, fmt.Errorf("no token.File for %s", uri)
}
content, err := r.data.Exported.FileContents(f.Name())
if err != nil {
return nil, err
}
return protocol.NewColumnMapper(uri, filename, fset, f, content), nil
}
func TestBytesOffset(t *testing.T) {
tests := []struct {
text string
pos protocol.Position
want int
}{
{text: `a𐐀b`, pos: protocol.Position{Line: 0, Character: 0}, want: 0},
{text: `a𐐀b`, pos: protocol.Position{Line: 0, Character: 1}, want: 1},
{text: `a𐐀b`, pos: protocol.Position{Line: 0, Character: 2}, want: 1},
{text: `a𐐀b`, pos: protocol.Position{Line: 0, Character: 3}, want: 5},
{text: `a𐐀b`, pos: protocol.Position{Line: 0, Character: 4}, want: 6},
{text: `a𐐀b`, pos: protocol.Position{Line: 0, Character: 5}, want: -1},
{text: "aaa\nbbb\n", pos: protocol.Position{Line: 0, Character: 3}, want: 3},
{text: "aaa\nbbb\n", pos: protocol.Position{Line: 0, Character: 4}, want: 3},
{text: "aaa\nbbb\n", pos: protocol.Position{Line: 1, Character: 0}, want: 4},
{text: "aaa\nbbb\n", pos: protocol.Position{Line: 1, Character: 3}, want: 7},
{text: "aaa\nbbb\n", pos: protocol.Position{Line: 1, Character: 4}, want: 7},
{text: "aaa\nbbb\n", pos: protocol.Position{Line: 2, Character: 0}, want: 8},
{text: "aaa\nbbb\n", pos: protocol.Position{Line: 2, Character: 1}, want: -1},
{text: "aaa\nbbb\n\n", pos: protocol.Position{Line: 2, Character: 0}, want: 8},
}
for i, test := range tests {
fname := fmt.Sprintf("test %d", i)
fset := token.NewFileSet()
f := fset.AddFile(fname, -1, len(test.text))
f.SetLinesForContent([]byte(test.text))
mapper := protocol.NewColumnMapper(span.FileURI(fname), fname, fset, f, []byte(test.text))
got, err := mapper.Point(test.pos)
if err != nil && test.want != -1 {
t.Errorf("unexpected error: %v", err)
}
if err == nil && got.Offset() != test.want {
t.Errorf("want %d for %q(Line:%d,Character:%d), but got %d", test.want, test.text, int(test.pos.Line), int(test.pos.Character), got.Offset())
}
}
}