blob: 66ef61ef0acb7e03316b22c33d2e2f4a58c3ac7c [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 source_test
import (
"bytes"
"context"
"fmt"
"os"
"os/exec"
"path/filepath"
"sort"
"strings"
"testing"
"time"
"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/fuzzy"
"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 TestSource(t *testing.T) {
packagestest.TestAll(t, testSource)
}
type runner struct {
view source.View
data *tests.Data
ctx context.Context
}
func testSource(t *testing.T, exporter packagestest.Exporter) {
ctx := tests.Context(t)
data := tests.Load(t, exporter, "../testdata")
defer data.Exported.Cleanup()
cache := cache.New()
session := cache.NewSession(ctx)
options := tests.DefaultOptions()
options.Env = data.Config.Env
r := &runner{
view: session.NewView(ctx, "source_test", span.FileURI(data.Config.Dir), options),
data: data,
ctx: ctx,
}
for filename, content := range data.Config.Overlay {
session.SetOverlay(span.FileURI(filename), source.DetectLanguage("", filename), content)
}
tests.Run(t, r, data)
}
func (r *runner) Diagnostics(t *testing.T, data tests.Diagnostics) {
for uri, want := range data {
f, err := r.view.GetFile(r.ctx, uri)
if err != nil {
t.Fatal(err)
}
results, _, err := source.Diagnostics(r.ctx, r.view, f.(source.GoFile), 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)
}
continue
}
if diff := tests.DiffDiagnostics(uri, want, got); diff != "" {
t.Error(diff)
}
}
}
func (r *runner) Completion(t *testing.T, data tests.Completions, items tests.CompletionItems) {
for src, test := range data {
var want []protocol.CompletionItem
for _, pos := range test.CompletionItems {
want = append(want, tests.ToProtocolCompletionItem(*items[pos]))
}
prefix, list := r.callCompletion(t, src, source.CompletionOptions{
Documentation: true,
FuzzyMatching: true,
})
if !strings.Contains(string(src.URI()), "builtins") {
list = tests.FilterBuiltins(list)
}
var got []protocol.CompletionItem
for _, item := range list {
if !strings.HasPrefix(strings.ToLower(item.Label), prefix) {
continue
}
got = append(got, item)
}
if diff := tests.DiffCompletionItems(want, got); diff != "" {
t.Errorf("%s: %s", src, diff)
}
}
}
func (r *runner) CompletionSnippets(t *testing.T, data tests.CompletionSnippets, items tests.CompletionItems) {
for _, placeholders := range []bool{true, false} {
for src, expected := range data {
_, list := r.callCompletion(t, src, source.CompletionOptions{
Placeholders: placeholders,
Deep: true,
Budget: 5 * time.Second,
})
got := tests.FindItem(list, *items[expected.CompletionItem])
want := expected.PlainSnippet
if placeholders {
want = expected.PlaceholderSnippet
}
if diff := tests.DiffSnippets(want, got); diff != "" {
t.Errorf("%s: %s", src, diff)
}
}
}
}
func (r *runner) UnimportedCompletions(t *testing.T, data tests.UnimportedCompletions, items tests.CompletionItems) {
for src, test := range data {
var want []protocol.CompletionItem
for _, pos := range test.CompletionItems {
want = append(want, tests.ToProtocolCompletionItem(*items[pos]))
}
_, got := r.callCompletion(t, src, source.CompletionOptions{
Unimported: true,
})
if !strings.Contains(string(src.URI()), "builtins") {
got = tests.FilterBuiltins(got)
}
if diff := tests.DiffCompletionItems(want, got); diff != "" {
t.Errorf("%s: %s", src, diff)
}
}
}
func (r *runner) DeepCompletions(t *testing.T, data tests.DeepCompletions, items tests.CompletionItems) {
for src, test := range data {
var want []protocol.CompletionItem
for _, pos := range test.CompletionItems {
want = append(want, tests.ToProtocolCompletionItem(*items[pos]))
}
prefix, list := r.callCompletion(t, src, source.CompletionOptions{
Deep: true,
Budget: 5 * time.Second,
Documentation: true,
})
if !strings.Contains(string(src.URI()), "builtins") {
list = tests.FilterBuiltins(list)
}
fuzzyMatcher := fuzzy.NewMatcher(prefix, fuzzy.Symbol)
var got []protocol.CompletionItem
for _, item := range list {
if fuzzyMatcher.Score(item.Label) < 0 {
continue
}
got = append(got, item)
}
if msg := tests.DiffCompletionItems(want, got); msg != "" {
t.Errorf("%s: %s", src, msg)
}
}
}
func (r *runner) FuzzyCompletions(t *testing.T, data tests.FuzzyCompletions, items tests.CompletionItems) {
for src, test := range data {
var want []protocol.CompletionItem
for _, pos := range test.CompletionItems {
want = append(want, tests.ToProtocolCompletionItem(*items[pos]))
}
prefix, list := r.callCompletion(t, src, source.CompletionOptions{
FuzzyMatching: true,
Deep: true,
Budget: 5 * time.Second,
})
if !strings.Contains(string(src.URI()), "builtins") {
list = tests.FilterBuiltins(list)
}
var fuzzyMatcher *fuzzy.Matcher
if prefix != "" {
fuzzyMatcher = fuzzy.NewMatcher(prefix, fuzzy.Symbol)
}
var got []protocol.CompletionItem
for _, item := range list {
if fuzzyMatcher != nil && fuzzyMatcher.Score(item.Label) < 0 {
continue
}
got = append(got, item)
}
if msg := tests.DiffCompletionItems(want, got); msg != "" {
t.Errorf("%s: %s", src, msg)
}
}
}
func (r *runner) RankCompletions(t *testing.T, data tests.RankCompletions, items tests.CompletionItems) {
for src, test := range data {
var want []protocol.CompletionItem
for _, pos := range test.CompletionItems {
want = append(want, tests.ToProtocolCompletionItem(*items[pos]))
}
prefix, list := r.callCompletion(t, src, source.CompletionOptions{
FuzzyMatching: true,
Deep: true,
Budget: 5 * time.Second,
})
if !strings.Contains(string(src.URI()), "builtins") {
list = tests.FilterBuiltins(list)
}
fuzzyMatcher := fuzzy.NewMatcher(prefix, fuzzy.Symbol)
var got []protocol.CompletionItem
for _, item := range list {
if fuzzyMatcher.Score(item.Label) < 0 {
continue
}
got = append(got, item)
}
if msg := tests.CheckCompletionOrder(want, got); msg != "" {
t.Errorf("%s: %s", src, msg)
}
}
}
func (r *runner) callCompletion(t *testing.T, src span.Span, options source.CompletionOptions) (string, []protocol.CompletionItem) {
f, err := r.view.GetFile(r.ctx, src.URI())
if err != nil {
t.Fatal(err)
}
list, surrounding, err := source.Completion(r.ctx, r.view, f.(source.GoFile), protocol.Position{
Line: float64(src.Start().Line() - 1),
Character: float64(src.Start().Column() - 1),
}, options)
if err != nil {
t.Fatalf("failed for %v: %v", src, err)
}
var prefix string
if surrounding != nil {
prefix = strings.ToLower(surrounding.Prefix())
}
// TODO(rstambler): In testing this out, I noticed that scores are equal,
// even when they shouldn't be. This needs more investigation.
sort.SliceStable(list, func(i, j int) bool {
return list[i].Score > list[j].Score
})
var numDeepCompletionsSeen int
var items []source.CompletionItem
// Apply deep completion filtering.
for _, item := range list {
if item.Depth > 0 {
if !options.Deep {
continue
}
if numDeepCompletionsSeen >= source.MaxDeepCompletions {
continue
}
numDeepCompletionsSeen++
}
items = append(items, item)
}
return prefix, tests.ToProtocolCompletionItems(items)
}
func (r *runner) FoldingRange(t *testing.T, data tests.FoldingRanges) {
for _, spn := range data {
uri := spn.URI()
f, err := r.view.GetFile(r.ctx, uri)
if err != nil {
t.Fatalf("failed for %v: %v", spn, err)
}
data, _, err := f.Handle(r.ctx).Read(r.ctx)
if err != nil {
t.Error(err)
continue
}
// Test all folding ranges.
ranges, err := source.FoldingRange(r.ctx, r.view, f.(source.GoFile), false)
if err != nil {
t.Error(err)
continue
}
r.foldingRanges(t, "foldingRange", uri, string(data), ranges)
// Test folding ranges with lineFoldingOnly
ranges, err = source.FoldingRange(r.ctx, r.view, f.(source.GoFile), true)
if err != nil {
t.Error(err)
continue
}
r.foldingRanges(t, "foldingRange-lineFolding", uri, string(data), ranges)
}
}
func (r *runner) foldingRanges(t *testing.T, prefix string, uri span.URI, data string, ranges []*source.FoldingRangeInfo) {
t.Helper()
// Fold all ranges.
nonOverlapping := nonOverlappingRanges(t, ranges)
for i, rngs := range nonOverlapping {
got, err := foldRanges(string(data), 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 []*source.FoldingRangeInfo
for _, fRng := range ranges {
if fRng.Kind == kind {
kindOnly = append(kindOnly, fRng)
}
}
nonOverlapping := nonOverlappingRanges(t, kindOnly)
for i, rngs := range nonOverlapping {
got, err := foldRanges(string(data), 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: failed for %s, expected:\n%v\ngot:\n%v", tag, uri.Filename(), want, got)
}
}
}
}
func nonOverlappingRanges(t *testing.T, ranges []*source.FoldingRangeInfo) (res [][]*source.FoldingRangeInfo) {
for _, fRng := range ranges {
setNum := len(res)
for i := 0; i < len(res); i++ {
canInsert := true
for _, rng := range res[i] {
if conflict(t, rng, fRng) {
canInsert = false
break
}
}
if canInsert {
setNum = i
break
}
}
if setNum == len(res) {
res = append(res, []*source.FoldingRangeInfo{})
}
res[setNum] = append(res[setNum], fRng)
}
return res
}
func conflict(t *testing.T, a, b *source.FoldingRangeInfo) bool {
arng, err := a.Range()
if err != nil {
t.Fatal(err)
}
brng, err := b.Range()
if err != nil {
t.Fatal(err)
}
// a start position is <= b start positions
return protocol.ComparePosition(arng.Start, brng.Start) <= 0 && protocol.ComparePosition(arng.End, brng.Start) > 0
}
func foldRanges(contents string, ranges []*source.FoldingRangeInfo) (string, error) {
foldedText := "<>"
res := contents
// Apply the folds from the end of the file forward
// to preserve the offsets.
for i := len(ranges) - 1; i >= 0; i-- {
fRange := ranges[i]
spn, err := fRange.Span()
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, data tests.Formats) {
ctx := r.ctx
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
}))
f, err := r.view.GetFile(ctx, uri)
if err != nil {
t.Fatalf("failed for %v: %v", spn, err)
}
edits, err := source.Format(ctx, r.view, f)
if err != nil {
if gofmted != "" {
t.Error(err)
}
continue
}
data, _, err := f.Handle(ctx).Read(ctx)
if err != nil {
t.Fatal(err)
}
m, err := r.data.Mapper(f.URI())
if err != nil {
t.Fatal(err)
}
diffEdits, err := source.FromProtocolEdits(m, edits)
if err != nil {
t.Error(err)
}
got := diff.ApplyEdits(string(data), diffEdits)
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 := r.ctx
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
}))
f, err := r.view.GetFile(ctx, uri)
if err != nil {
t.Fatalf("failed for %v: %v", spn, err)
}
fh := f.Handle(ctx)
tok, err := r.view.Session().Cache().TokenHandle(fh).Token(ctx)
if err != nil {
t.Fatal(err)
}
rng, err := spn.Range(span.NewTokenConverter(r.data.Exported.ExpectFileSet, tok))
if err != nil {
t.Fatalf("failed for %v: %v", spn, err)
}
edits, err := source.Imports(ctx, r.view, f.(source.GoFile), rng)
if err != nil {
if goimported != "" {
t.Error(err)
}
continue
}
data, _, err := fh.Read(ctx)
if err != nil {
t.Fatal(err)
}
m, err := r.data.Mapper(fh.Identity().URI)
if err != nil {
t.Fatal(err)
}
diffEdits, err := source.FromProtocolEdits(m, edits)
if err != nil {
t.Error(err)
}
got := diff.ApplyEdits(string(data), diffEdits)
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, data tests.SuggestedFixes) {
}
func (r *runner) Definition(t *testing.T, data tests.Definitions) {
ctx := r.ctx
for _, d := range data {
f, err := r.view.GetFile(ctx, d.Src.URI())
if err != nil {
t.Fatalf("failed for %v: %v", d.Src, err)
}
_, srcRng, err := spanToRange(r.data, d.Src)
if err != nil {
t.Fatal(err)
}
ident, err := source.Identifier(ctx, r.view, f.(source.GoFile), srcRng.Start)
if err != nil {
t.Fatalf("failed for %v: %v", d.Src, err)
}
h, err := ident.Hover(ctx)
if err != nil {
t.Fatalf("failed for %v: %v", d.Src, err)
}
var hover string
if h.Synopsis != "" {
hover += h.Synopsis + "\n"
}
hover += h.Signature
rng, err := ident.Range()
if err != nil {
t.Fatal(err)
}
if d.IsType {
rng, err = ident.Type.Range()
if err != nil {
t.Fatal(err)
}
hover = ""
}
if hover != "" {
tag := fmt.Sprintf("%s-hover", d.Name)
expectHover := string(r.data.Golden(tag, d.Src.URI().Filename(), func() ([]byte, error) {
return []byte(hover), nil
}))
if hover != expectHover {
t.Errorf("for %v got %q want %q", d.Src, hover, expectHover)
}
} else if !d.OnlyHover {
if _, defRng, err := spanToRange(r.data, d.Def); err != nil {
t.Fatal(err)
} else if rng != defRng {
t.Errorf("for %v got %v want %v", d.Src, rng, d.Def)
}
} else {
t.Errorf("no tests ran for %s", d.Src.URI())
}
}
}
func (r *runner) Highlight(t *testing.T, data tests.Highlights) {
ctx := r.ctx
for name, locations := range data {
src := locations[0]
m, srcRng, err := spanToRange(r.data, src)
if err != nil {
t.Fatal(err)
}
highlights, err := source.Highlight(ctx, r.view, src.URI(), srcRng.Start)
if err != nil {
t.Errorf("highlight failed for %s: %v", src.URI(), err)
}
if len(highlights) != len(locations) {
t.Errorf("got %d highlights for %s, expected %d", len(highlights), name, len(locations))
}
for i, got := range highlights {
want, err := m.Range(locations[i])
if err != nil {
t.Fatal(err)
}
if got != want {
t.Errorf("want %v, got %v\n", want, got)
}
}
}
}
func (r *runner) Reference(t *testing.T, data tests.References) {
ctx := r.ctx
for src, itemList := range data {
f, err := r.view.GetFile(ctx, src.URI())
if err != nil {
t.Fatalf("failed for %v: %v", src, err)
}
_, srcRng, err := spanToRange(r.data, src)
if err != nil {
t.Fatal(err)
}
ident, err := source.Identifier(ctx, r.view, f.(source.GoFile), srcRng.Start)
if err != nil {
t.Fatalf("failed for %v: %v", src, err)
}
want := make(map[span.Span]bool)
for _, pos := range itemList {
want[pos] = true
}
refs, err := ident.References(ctx)
if err != nil {
t.Fatalf("failed for %v: %v", src, err)
}
got := make(map[span.Span]bool)
for _, refInfo := range refs {
refSpan, err := refInfo.Span()
if err != nil {
t.Fatal(err)
}
got[refSpan] = true
}
if len(got) != len(want) {
t.Errorf("references failed: different lengths got %v want %v", len(got), len(want))
}
for spn, _ := range got {
if !want[spn] {
t.Errorf("references failed: incorrect references got %v want locations %v", got, want)
}
}
}
}
func (r *runner) Rename(t *testing.T, data tests.Renames) {
ctx := r.ctx
for spn, newText := range data {
tag := fmt.Sprintf("%s-rename", newText)
f, err := r.view.GetFile(ctx, spn.URI())
if err != nil {
t.Fatalf("failed for %v: %v", spn, err)
}
_, srcRng, err := spanToRange(r.data, spn)
if err != nil {
t.Fatal(err)
}
ident, err := source.Identifier(r.ctx, r.view, f.(source.GoFile), srcRng.Start)
if err != nil {
t.Error(err)
continue
}
changes, err := ident.Rename(r.ctx, r.view, newText)
if err != nil {
renamed := string(r.data.Golden(tag, spn.URI().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 editSpn, edits := range changes {
f, err := r.view.GetFile(ctx, editSpn)
if err != nil {
t.Fatalf("failed for %v: %v", spn, err)
}
fh := f.Handle(ctx)
data, _, err := fh.Read(ctx)
if err != nil {
t.Fatal(err)
}
m, err := r.data.Mapper(fh.Identity().URI)
if err != nil {
t.Fatal(err)
}
filename := filepath.Base(editSpn.Filename())
diffEdits, err := source.FromProtocolEdits(m, edits)
if err != nil {
t.Fatal(err)
}
contents := applyEdits(string(data), diffEdits)
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, spn.URI().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 []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) PrepareRename(t *testing.T, data tests.PrepareRenames) {
ctx := context.Background()
for src, want := range data {
f, err := r.view.GetFile(ctx, src.URI())
if err != nil {
t.Fatalf("failed for %v: %v", src, err)
}
_, srcRng, err := spanToRange(r.data, src)
if err != nil {
t.Fatal(err)
}
// Find the identifier at the position.
item, err := source.PrepareRename(ctx, r.view, f.(source.GoFile), srcRng.Start)
if err != nil {
if want.Text != "" { // expected an ident.
t.Errorf("prepare rename failed for %v: got error: %v", src, err)
}
continue
}
if item == nil {
if want.Text != "" {
t.Errorf("prepare rename failed for %v: got nil", src)
}
continue
}
if want.Text == "" && item != nil {
t.Errorf("prepare rename failed for %v: expected nil, got %v", src, item)
continue
}
if protocol.CompareRange(want.Range, item.Range) != 0 {
t.Errorf("prepare rename failed: incorrect range got %v want %v", item.Range, want.Range)
}
}
}
func (r *runner) Symbol(t *testing.T, data tests.Symbols) {
ctx := r.ctx
for uri, expectedSymbols := range data {
f, err := r.view.GetFile(ctx, uri)
if err != nil {
t.Fatalf("failed for %v: %v", uri, err)
}
symbols, err := source.DocumentSymbols(ctx, r.view, f.(source.GoFile))
if err != nil {
t.Errorf("symbols failed for %s: %v", uri, 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, 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(w.SelectionRange, g.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, data tests.Signatures) {
ctx := r.ctx
for spn, expectedSignature := range data {
f, err := r.view.GetFile(ctx, spn.URI())
if err != nil {
t.Fatalf("failed for %v: %v", spn, err)
}
_, rng, err := spanToRange(r.data, spn)
if err != nil {
t.Fatal(err)
}
gotSignature, err := source.SignatureHelp(ctx, r.view, f.(source.GoFile), rng.Start)
if err != nil {
// Only fail if we got an error we did not expect.
if expectedSignature != nil {
t.Fatalf("failed for %v: %v", spn, err)
}
}
if expectedSignature == nil {
if gotSignature != nil {
t.Errorf("expected no signature, got %v", gotSignature)
}
continue
}
if diff := diffSignatures(spn, expectedSignature, gotSignature); diff != "" {
t.Error(diff)
}
}
}
func diffSignatures(spn span.Span, want *source.SignatureInformation, got *source.SignatureInformation) string {
decorate := func(f string, args ...interface{}) string {
return fmt.Sprintf("Invalid signature at %s: %s", spn, fmt.Sprintf(f, args...))
}
if want.ActiveParameter != got.ActiveParameter {
return decorate("wanted active parameter of %d, got %f", want.ActiveParameter, got.ActiveParameter)
}
if want.Label != got.Label {
return decorate("wanted label %q, got %q", want.Label, got.Label)
}
var paramParts []string
for _, p := range got.Parameters {
paramParts = append(paramParts, p.Label)
}
paramsStr := strings.Join(paramParts, ", ")
if !strings.Contains(got.Label, paramsStr) {
return decorate("expected signature %q to contain params %q", got.Label, paramsStr)
}
return ""
}
func (r *runner) Link(t *testing.T, data tests.Links) {
// This is a pure LSP feature, no source level functionality to be tested.
}
func spanToRange(data *tests.Data, spn span.Span) (*protocol.ColumnMapper, protocol.Range, error) {
m, err := data.Mapper(spn.URI())
if err != nil {
return nil, protocol.Range{}, err
}
srcRng, err := m.Range(spn)
if err != nil {
return nil, protocol.Range{}, err
}
return m, srcRng, nil
}