blob: 36be0fde58acdb20acffa41974b87ba3013d5bb0 [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"
"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/span"
"golang.org/x/tools/internal/testenv"
)
func TestMain(m *testing.M) {
testenv.ExitIfSmallMachine()
os.Exit(m.Run())
}
func TestLSP(t *testing.T) {
packagestest.TestAll(t, testLSP)
}
type runner struct {
server *Server
data *tests.Data
ctx context.Context
}
const viewName = "lsp_test"
func testLSP(t *testing.T, exporter packagestest.Exporter) {
ctx := tests.Context(t)
data := tests.Load(t, exporter, "testdata")
defer data.Exported.Cleanup()
cache := cache.New(nil)
session := cache.NewSession(ctx)
options := tests.DefaultOptions()
session.SetOptions(options)
options.Env = data.Config.Env
session.NewView(ctx, viewName, span.FileURI(data.Config.Dir), options)
for filename, content := range data.Config.Overlay {
session.SetOverlay(span.FileURI(filename), source.DetectLanguage("", filename), content)
}
r := &runner{
server: &Server{
session: session,
undelivered: make(map[span.URI][]source.Diagnostic),
},
data: data,
ctx: ctx,
}
tests.Run(t, r, data)
}
// TODO: Actually test the LSP diagnostics function in this test.
func (r *runner) Diagnostics(t *testing.T, uri span.URI, want []source.Diagnostic) {
v := r.server.session.View(viewName)
f, err := v.GetFile(r.ctx, uri)
if err != nil {
t.Fatalf("no file for %s: %v", f, err)
}
results, _, err := source.Diagnostics(r.ctx, v, f, nil)
if err != nil {
t.Fatal(err)
}
got := results[uri]
// A special case to test that there are no diagnostics for a file.
if len(want) == 1 && want[0].Source == "no_diagnostics" {
if len(got) != 0 {
t.Errorf("expected no diagnostics for %s, got %v", uri, got)
}
return
}
if diff := tests.DiffDiagnostics(want, got); diff != "" {
t.Error(diff)
}
}
func (r *runner) FoldingRange(t *testing.T, spn span.Span) {
uri := spn.URI()
view := r.server.session.ViewOf(uri)
original := view.Options()
modified := original
// Test all folding ranges.
modified.LineFoldingOnly = false
view.SetOptions(modified)
ranges, err := r.server.FoldingRange(r.ctx, &protocol.FoldingRangeParams{
TextDocument: protocol.TextDocumentIdentifier{
URI: protocol.NewURI(uri),
},
})
if err != nil {
t.Error(err)
return
}
r.foldingRanges(t, "foldingRange", uri, ranges)
// Test folding ranges with lineFoldingOnly = true.
modified.LineFoldingOnly = true
view.SetOptions(modified)
ranges, err = r.server.FoldingRange(r.ctx, &protocol.FoldingRangeParams{
TextDocument: protocol.TextDocumentIdentifier{
URI: protocol.NewURI(uri),
},
})
if err != nil {
t.Error(err)
return
}
r.foldingRanges(t, "foldingRange-lineFolding", uri, ranges)
view.SetOptions(original)
}
func (r *runner) foldingRanges(t *testing.T, prefix string, uri span.URI, ranges []protocol.FoldingRange) {
m, err := r.data.Mapper(uri)
if err != nil {
t.Fatal(err)
}
// Fold all ranges.
nonOverlapping := nonOverlappingRanges(ranges)
for i, rngs := range nonOverlapping {
got, err := foldRanges(m, string(m.Content), rngs)
if err != nil {
t.Error(err)
continue
}
tag := fmt.Sprintf("%s-%d", prefix, i)
want := string(r.data.Golden(tag, uri.Filename(), func() ([]byte, error) {
return []byte(got), nil
}))
if want != got {
t.Errorf("%s: foldingRanges failed for %s, expected:\n%v\ngot:\n%v", tag, uri.Filename(), want, got)
}
}
// Filter by kind.
kinds := []protocol.FoldingRangeKind{protocol.Imports, protocol.Comment}
for _, kind := range kinds {
var kindOnly []protocol.FoldingRange
for _, fRng := range ranges {
if fRng.Kind == string(kind) {
kindOnly = append(kindOnly, fRng)
}
}
nonOverlapping := nonOverlappingRanges(kindOnly)
for i, rngs := range nonOverlapping {
got, err := foldRanges(m, string(m.Content), rngs)
if err != nil {
t.Error(err)
continue
}
tag := fmt.Sprintf("%s-%s-%d", prefix, kind, i)
want := string(r.data.Golden(tag, uri.Filename(), func() ([]byte, error) {
return []byte(got), nil
}))
if want != got {
t.Errorf("%s: foldingRanges failed for %s, expected:\n%v\ngot:\n%v", tag, uri.Filename(), want, got)
}
}
}
}
func nonOverlappingRanges(ranges []protocol.FoldingRange) (res [][]protocol.FoldingRange) {
for _, fRng := range ranges {
setNum := len(res)
for i := 0; i < len(res); i++ {
canInsert := true
for _, rng := range res[i] {
if conflict(rng, fRng) {
canInsert = false
break
}
}
if canInsert {
setNum = i
break
}
}
if setNum == len(res) {
res = append(res, []protocol.FoldingRange{})
}
res[setNum] = append(res[setNum], fRng)
}
return res
}
func conflict(a, b protocol.FoldingRange) bool {
// a start position is <= b start positions
return (a.StartLine < b.StartLine || (a.StartLine == b.StartLine && a.StartCharacter <= b.StartCharacter)) &&
(a.EndLine > b.StartLine || (a.EndLine == b.StartLine && a.EndCharacter > b.StartCharacter))
}
func foldRanges(m *protocol.ColumnMapper, contents string, ranges []protocol.FoldingRange) (string, error) {
foldedText := "<>"
res := contents
// Apply the edits from the end of the file forward
// to preserve the offsets
for i := len(ranges) - 1; i >= 0; i-- {
fRange := ranges[i]
spn, err := m.RangeSpan(protocol.Range{
Start: protocol.Position{
Line: fRange.StartLine,
Character: fRange.StartCharacter,
},
End: protocol.Position{
Line: fRange.EndLine,
Character: fRange.EndCharacter,
},
})
if err != nil {
return "", err
}
start := spn.Start().Offset()
end := spn.End().Offset()
tmp := res[0:start] + foldedText
res = tmp + res[end:]
}
return res, nil
}
func (r *runner) Format(t *testing.T, spn span.Span) {
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(r.ctx, &protocol.DocumentFormattingParams{
TextDocument: protocol.TextDocumentIdentifier{
URI: protocol.NewURI(uri),
},
})
if err != nil {
if gofmted != "" {
t.Error(err)
}
return
}
m, err := r.data.Mapper(uri)
if err != nil {
t.Fatal(err)
}
sedits, err := source.FromProtocolEdits(m, edits)
if err != nil {
t.Error(err)
}
got := diff.ApplyEdits(string(m.Content), sedits)
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, spn span.Span) {
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(r.ctx, &protocol.CodeActionParams{
TextDocument: protocol.TextDocumentIdentifier{
URI: protocol.NewURI(uri),
},
})
if err != nil {
if goimported != "" {
t.Error(err)
}
return
}
m, err := r.data.Mapper(uri)
if err != nil {
t.Fatal(err)
}
var edits []protocol.TextEdit
for _, a := range actions {
if a.Title == "Organize Imports" {
edits = (*a.Edit.Changes)[string(uri)]
}
}
sedits, err := source.FromProtocolEdits(m, edits)
if err != nil {
t.Error(err)
}
got := diff.ApplyEdits(string(m.Content), sedits)
if goimported != got {
t.Errorf("import failed for %s, expected:\n%v\ngot:\n%v", filename, goimported, got)
}
}
func (r *runner) SuggestedFix(t *testing.T, spn span.Span) {
uri := spn.URI()
filename := uri.Filename()
view := r.server.session.ViewOf(uri)
f, err := view.GetFile(r.ctx, uri)
if err != nil {
t.Fatal(err)
}
diagnostics, _, err := source.Diagnostics(r.ctx, view, f, nil)
if err != nil {
t.Fatal(err)
}
actions, err := r.server.CodeAction(r.ctx, &protocol.CodeActionParams{
TextDocument: protocol.TextDocumentIdentifier{
URI: protocol.NewURI(uri),
},
Context: protocol.CodeActionContext{
Only: []protocol.CodeActionKind{protocol.QuickFix},
Diagnostics: toProtocolDiagnostics(r.ctx, diagnostics[uri]),
},
})
if err != nil {
t.Error(err)
return
}
m, err := r.data.Mapper(f.URI())
if err != nil {
t.Fatal(err)
}
var edits []protocol.TextEdit
for _, a := range actions {
if a.Title == "Remove" {
edits = (*a.Edit.Changes)[string(uri)]
}
}
sedits, err := source.FromProtocolEdits(m, edits)
if err != nil {
t.Error(err)
}
got := diff.ApplyEdits(string(m.Content), sedits)
fixed := string(r.data.Golden("suggestedfix", filename, func() ([]byte, error) {
return []byte(got), nil
}))
if fixed != got {
t.Errorf("suggested fixes failed for %s, expected:\n%v\ngot:\n%v", filename, fixed, got)
}
}
func (r *runner) Definition(t *testing.T, spn span.Span, d tests.Definition) {
sm, err := r.data.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)
}
tdpp := protocol.TextDocumentPositionParams{
TextDocument: protocol.TextDocumentIdentifier{URI: loc.URI},
Position: loc.Range.Start,
}
var locs []protocol.Location
var hover *protocol.Hover
if d.IsType {
params := &protocol.TypeDefinitionParams{
TextDocumentPositionParams: tdpp,
}
locs, err = r.server.TypeDefinition(r.ctx, params)
} else {
params := &protocol.DefinitionParams{
TextDocumentPositionParams: tdpp,
}
locs, err = r.server.Definition(r.ctx, params)
if err != nil {
t.Fatalf("failed for %v: %+v", d.Src, err)
}
v := &protocol.HoverParams{
TextDocumentPositionParams: tdpp,
}
hover, err = r.server.Hover(r.ctx, v)
}
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.data.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) Implementation(t *testing.T, spn span.Span, m tests.Implementations) {
sm, err := r.data.Mapper(m.Src.URI())
if err != nil {
t.Fatal(err)
}
loc, err := sm.Location(m.Src)
if err != nil {
t.Fatalf("failed for %v: %v", m.Src, err)
}
tdpp := protocol.TextDocumentPositionParams{
TextDocument: protocol.TextDocumentIdentifier{URI: loc.URI},
Position: loc.Range.Start,
}
var locs []protocol.Location
params := &protocol.ImplementationParams{
TextDocumentPositionParams: tdpp,
}
locs, err = r.server.Implementation(r.ctx, params)
if err != nil {
t.Fatalf("failed for %v: %v", m.Src, err)
}
if len(locs) != len(m.Implementations) {
t.Fatalf("got %d locations for implementation, expected %d", len(locs), len(m.Implementations))
}
for i := range locs {
locURI := span.NewURI(locs[i].URI)
lm, err := r.data.Mapper(locURI)
if err != nil {
t.Fatal(err)
}
if imp, err := lm.Span(locs[i]); err != nil {
t.Fatalf("failed for %v: %v", locs[i], err)
} else if imp != m.Implementations[i] {
t.Errorf("for %dth implementation of %v got %v want %v", i, m.Src, imp, m.Implementations[i])
}
}
}
func (r *runner) Highlight(t *testing.T, name string, locations []span.Span) {
m, err := r.data.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)
}
tdpp := protocol.TextDocumentPositionParams{
TextDocument: protocol.TextDocumentIdentifier{URI: loc.URI},
Position: loc.Range.Start,
}
params := &protocol.DocumentHighlightParams{
TextDocumentPositionParams: tdpp,
}
highlights, err := r.server.DocumentHighlight(r.ctx, 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) References(t *testing.T, src span.Span, itemList []span.Span) {
sm, err := r.data.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.data.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(r.ctx, 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, spn span.Span, newText string) {
tag := fmt.Sprintf("%s-rename", newText)
uri := spn.URI()
filename := uri.Filename()
sm, err := r.data.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(r.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)
}
return
}
var res []string
for uri, edits := range *workspaceEdits.Changes {
m, err := r.data.Mapper(span.URI(uri))
if err != nil {
t.Fatal(err)
}
sedits, err := source.FromProtocolEdits(m, edits)
if err != nil {
t.Error(err)
}
filename := filepath.Base(m.URI.Filename())
contents := applyEdits(string(m.Content), sedits)
if len(*workspaceEdits.Changes) > 1 {
contents = fmt.Sprintf("%s:\n%s", filename, contents)
}
res = append(res, 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 (r *runner) PrepareRename(t *testing.T, src span.Span, want *source.PrepareItem) {
m, err := r.data.Mapper(src.URI())
if err != nil {
t.Fatal(err)
}
loc, err := m.Location(src)
if err != nil {
t.Fatalf("failed for %v: %v", src, err)
}
tdpp := protocol.TextDocumentPositionParams{
TextDocument: protocol.TextDocumentIdentifier{URI: loc.URI},
Position: loc.Range.Start,
}
params := &protocol.PrepareRenameParams{
TextDocumentPositionParams: tdpp,
}
got, err := r.server.PrepareRename(context.Background(), params)
if err != nil {
t.Errorf("prepare rename failed for %v: got error: %v", src, err)
return
}
if got == nil {
if want.Text != "" { // expected an ident.
t.Errorf("prepare rename failed for %v: got nil", src)
}
return
}
if protocol.CompareRange(*got, want.Range) != 0 {
t.Errorf("prepare rename failed: incorrect range got %v want %v", *got, want.Range)
}
}
func applyEdits(contents string, edits []diff.TextEdit) string {
res := contents
// 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 (r *runner) Symbols(t *testing.T, uri span.URI, expectedSymbols []protocol.DocumentSymbol) {
params := &protocol.DocumentSymbolParams{
TextDocument: protocol.TextDocumentIdentifier{
URI: string(uri),
},
}
symbols, err := r.server.DocumentSymbol(r.ctx, 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))
return
}
if diff := r.diffSymbols(t, uri, expectedSymbols, symbols); diff != "" {
t.Error(diff)
}
}
func (r *runner) diffSymbols(t *testing.T, uri span.URI, want []protocol.DocumentSymbol, 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 })
if len(got) != len(want) {
return summarizeSymbols(t, -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(t, i, want, got, "incorrect name got %v want %v", g.Name, w.Name)
}
if w.Kind != g.Kind {
return summarizeSymbols(t, i, want, got, "incorrect kind got %v want %v", g.Kind, w.Kind)
}
if protocol.CompareRange(g.SelectionRange, w.SelectionRange) != 0 {
return summarizeSymbols(t, i, want, got, "incorrect span got %v want %v", g.SelectionRange, w.SelectionRange)
}
if msg := r.diffSymbols(t, uri, w.Children, g.Children); msg != "" {
return fmt.Sprintf("children of %s: %s", w.Name, msg)
}
}
return ""
}
func summarizeSymbols(t *testing.T, i int, want, 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.SelectionRange)
}
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, spn span.Span, expectedSignature *source.SignatureInformation) {
m, err := r.data.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)
}
tdpp := protocol.TextDocumentPositionParams{
TextDocument: protocol.TextDocumentIdentifier{
URI: protocol.NewURI(spn.URI()),
},
Position: loc.Range.Start,
}
params := &protocol.SignatureHelpParams{
TextDocumentPositionParams: tdpp,
}
gotSignatures, err := r.server.SignatureHelp(r.ctx, params)
if err != nil {
// Only fail if we got an error we did not expect.
if expectedSignature != nil {
t.Fatal(err)
}
return
}
if expectedSignature == nil {
if gotSignatures != nil {
t.Errorf("expected no signature, got %v", gotSignatures)
}
return
}
if gotSignatures == nil {
t.Fatalf("expected %v, got nil", expectedSignature)
}
if diff := diffSignatures(spn, expectedSignature, 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, uri span.URI, wantLinks []tests.Link) {
m, err := r.data.Mapper(uri)
if err != nil {
t.Fatal(err)
}
got, err := r.server.DocumentLink(r.ctx, &protocol.DocumentLinkParams{
TextDocument: protocol.TextDocumentIdentifier{
URI: protocol.NewURI(uri),
},
})
if err != nil {
t.Fatal(err)
}
if diff := tests.DiffLinks(m, wantLinks, got); diff != "" {
t.Error(diff)
}
}
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))
uri := span.FileURI(fname)
converter := span.NewContentConverter(fname, []byte(test.text))
mapper := &protocol.ColumnMapper{
URI: uri,
Converter: converter,
Content: []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())
}
}
}