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|
package jslang_test
import (
"context"
"errors"
"os"
"os/exec"
"path/filepath"
"strings"
"testing"
"time"
"github.com/gdamore/tcell/v2"
"rickub.com/turbo-editors/turbo-core/app"
"rickub.com/turbo-editors/turbo-core/buffer"
"rickub.com/turbo-editors/turbo-core/lsp"
"rickub.com/turbo-editors/turbo-core/syntax"
"rickub.com/turbo-editors/turbo-core/ui"
"rickub.com/turbo-editors/turbo-js/internal/jslang"
)
// --- the editor, assembled --------------------------------------------------
func TestTheEditorCallsItselfTurboJS(t *testing.T) {
editor := newTestEditor(t)
if got := editor.Profile().Name; got != jslang.Name {
t.Errorf("Profile().Name = %q, want %q", got, jslang.Name)
}
if got := editor.Profile().ProjectDir(); got != ".turbo-js" {
t.Errorf("ProjectDir() = %q, want %q", got, ".turbo-js")
}
}
func TestTheEditorColoursJavaScriptItOpens(t *testing.T) {
// The whole path in one test: Register taught the library this editor's
// JavaScript, the profile named the editor, and a .js file opened through
// the public API comes out coloured — by this scanner, which is what the
// regular expression proves.
root := t.TempDir()
path := filepath.Join(root, "main.js")
writeFile(t, path, "const re = /x/;\nconsole.log(re);\n")
editor := newTestEditor(t)
editor.Open(path)
if got := editor.ActiveView().Language(); got != jslang.Language {
t.Fatalf("the view colours the file as %q, want %q", got, jslang.Language)
}
spans := syntax.Highlight(jslang.Language, "const re = /x/;")
if len(spans[0]) == 0 {
t.Fatal("the registered JavaScript scanner colours nothing")
}
if !coloured(spans[0], 11, syntax.ClassChar) {
t.Errorf("/x/ is not coloured as a regular expression; the library's own scanner is still in charge: %v", spans[0])
}
}
func TestTheEditorColoursPackageJSON(t *testing.T) {
root := t.TempDir()
path := filepath.Join(root, "package.json")
writeFile(t, path, "{\n \"name\": \"demo\"\n}\n")
editor := newTestEditor(t)
editor.Open(path)
if got := editor.ActiveView().Language(); got != jslang.LanguageJSON {
t.Errorf("package.json is coloured as %q, want %q", got, jslang.LanguageJSON)
}
}
func TestAScriptWithANodeShebangAndNoExtensionIsJavaScriptToo(t *testing.T) {
// A command-line tool has no extension; its first line is what identifies
// it, and the editor reads that line before choosing a scanner.
root := t.TempDir()
path := filepath.Join(root, "cli")
writeFile(t, path, "#!/usr/bin/env node\nconsole.log('hi');\n")
editor := newTestEditor(t)
editor.Open(path)
if got := editor.ActiveView().Language(); got != jslang.Language {
t.Errorf("a script opening with a node shebang is coloured as %q, want %q", got, jslang.Language)
}
}
func TestTheEditorDoesNotColourTheOtherEditorsLanguages(t *testing.T) {
// "JavaScript instead of Python" is the whole point of this editor being
// a separate one: a .py, .rs or .go file opens as plain text here — and
// so does TypeScript, which the reference documents as a boundary.
root := t.TempDir()
editor := newTestEditor(t)
for name, source := range map[string]string{
"main.py": "print('hi')\n",
"main.rs": "fn main() {}\n",
"main.go": "package main\n",
"main.ts": "const x: number = 1;\n",
} {
path := filepath.Join(root, name)
writeFile(t, path, source)
editor.Open(path)
if got := editor.ActiveView().Language(); got != syntax.LanguageNone {
t.Errorf("%s is coloured as %q; Turbo JS registers JavaScript and JSON, nothing else", name, got)
}
}
}
func TestAProjectsOwnFilesAreStillColouredByTheLibrary(t *testing.T) {
// A README, a compose file, a Dockerfile and a web page are what a Node
// project is made of besides its scripts, and turbo-core colours all four
// without this editor doing anything. That the inherited languages
// survive registration is worth one test, because syntax.Register writes
// into package-level state — and this editor replaces one of them.
root := t.TempDir()
editor := newTestEditor(t)
for name, want := range map[string]syntax.Language{
"README.md": syntax.LanguageMarkdown,
"compose.yaml": syntax.LanguageYAML,
"Dockerfile": syntax.LanguageDockerfile,
"index.html": syntax.LanguageHTML,
} {
path := filepath.Join(root, name)
writeFile(t, path, "# heading\n")
editor.Open(path)
if got := editor.ActiveView().Language(); got != want {
t.Errorf("%s is coloured as %q, want %q", name, got, want)
}
}
}
func TestTheToolchainMenuIsCalledJavaScriptAndNoTwoMenusShareAHotKey(t *testing.T) {
// The bar answers the first menu whose hot key matches, so a clash makes
// one of the two unreachable from the keyboard — silently, and with every
// other test still passing. JavaScript takes J because none of the fixed
// menus does, which is exactly the sort of thing only this test notices.
editor := newTestEditor(t)
seen := map[rune]string{}
found := false
for _, menu := range editor.MenuBar().Menus() {
label, hot, _ := ui.SplitHotKey(menu.Label)
if label == "JavaScript" {
found = true
}
if hot == 0 {
t.Errorf("the %q menu has no hot key", label)
continue
}
if other, clash := seen[hot]; clash {
t.Errorf("%q and %q both answer to Alt-%c", other, label, hot)
}
seen[hot] = label
}
if !found {
t.Error("there is no JavaScript menu on the bar")
}
}
func TestTheAgentMenuOffersToCreateTheAgentsFileInAProjectWithoutOne(t *testing.T) {
// The agent windows are turbo-core's; what this editor contributes is the
// starter file, and the menu item that writes it has to be reachable in a
// project that has none — which is every project, at first.
t.Chdir(t.TempDir())
editor := newTestEditor(t)
var agentMenu *ui.Menu
for _, menu := range editor.MenuBar().Menus() {
if label, _, _ := ui.SplitHotKey(menu.Label); label == "Agent" {
agentMenu = menu
}
}
if agentMenu == nil {
t.Fatal("there is no Agent menu on the bar")
}
for _, item := range agentMenu.Items {
if label, _, _ := ui.SplitHotKey(item.Label); label == "Create agents file" {
if item.Enabled != nil && !item.Enabled() {
t.Error("Create agents file is greyed out in a project that has no agents file")
}
return
}
}
t.Error("the Agent menu has no Create agents file item")
}
// --- driven against a real typescript-language-server -----------------------
// TestCompletionEndToEndWithRealServer drives the exact sequence the command
// does at start-up: open the file first, start the language server second,
// then ask for a completion.
//
// That order is the whole point, and it is the one Turbo Go got wrong once: an
// editor that announces its open documents to a server which does not exist yet
// and never mentions them again gets answers about a file the server has never
// heard of — which looks, from the outside, exactly like completion not
// working.
//
// It skips itself when typescript-language-server is not installed, and under
// -short.
func TestCompletionEndToEndWithRealServer(t *testing.T) {
root, editor := startRealServer(t)
path := filepath.Join(root, "main.js")
// Both lines on disk are blank. A function is *declared* by typing, at top
// level, then its name is typed inside main, so the answer can only come
// from what the editor told the server — which is the whole point of this
// test. The server offers every global for any file at all, so a
// completion holding console would prove nothing; a completion holding a
// function that exists only in the buffer proves the buffer was sent.
view := editor.ActiveView()
view.Buffer().SetCursor(buffer.Position{Line: declarationLine, Col: 0})
typeText(editor, "function zorglub(x) { return x; }")
view.Buffer().SetCursor(buffer.Position{Line: completionLine, Col: 2})
typeText(editor, "zorg")
if !waitForCompletion(t, editor) {
t.Fatalf("no completion list opened for %s; the status bar says %q", path, editor.StatusBar().Message())
}
if !completionOffers(editor, "zorglub") {
t.Errorf("the list does not offer the function typed into the buffer; it has %d entries", editor.Completion().Count())
}
}
func TestGoToDefinitionWithRealServer(t *testing.T) {
root, editor := startRealServer(t)
path := filepath.Join(root, "main.js")
locations := waitForLocations(t, func(ctx context.Context) ([]lsp.Location, error) {
return editor.Language().Definition(ctx, path, callLine, callColumn, callLineText)
})
if len(locations) != 1 {
t.Fatalf("the call to helper has %d definitions, want exactly 1: %v", len(locations), locations)
}
if got := locations[0].Range.Start.Line; got != helperLine {
t.Errorf("the definition of helper is on line %d, want %d", got, helperLine)
}
}
func TestReferencesListEveryUseWithRealServer(t *testing.T) {
// helper is declared once and called twice. Three answers is the shape
// the editor turns into a list rather than a jump, and the one a single
// definition never exercises.
root, editor := startRealServer(t)
path := filepath.Join(root, "main.js")
locations := waitForLocations(t, func(ctx context.Context) ([]lsp.Location, error) {
return editor.Language().References(ctx, path, helperLine, helperColumn, helperLineText)
})
lines := map[int]bool{}
for _, location := range locations {
lines[location.Range.Start.Line] = true
}
for _, want := range []int{firstCallLine, secondCallLine} {
if !lines[want] {
t.Errorf("the references to helper do not include the call on line %d: %v", want, lines)
}
}
}
func TestImplementationsOfAClassAreItsSubclassesWithRealServer(t *testing.T) {
// Shape has two subclasses. Asking for its implementations is the one
// question whose answer is a list by nature, and the server answers it
// for JavaScript as it does for TypeScript.
root, editor := startRealServer(t)
path := filepath.Join(root, "main.js")
locations := waitForLocations(t, func(ctx context.Context) ([]lsp.Location, error) {
return editor.Language().Implementation(ctx, path, shapeLine, shapeColumn, shapeLineText)
})
lines := map[int]bool{}
for _, location := range locations {
lines[location.Range.Start.Line] = true
}
for _, want := range []int{circleLine, squareLine} {
if !lines[want] {
t.Errorf("the implementations of Shape do not include the class on line %d: %v", want, lines)
}
}
}
func TestTypeDefinitionOfAnInstanceIsItsClassWithRealServer(t *testing.T) {
root, editor := startRealServer(t)
path := filepath.Join(root, "main.js")
locations := waitForLocations(t, func(ctx context.Context) ([]lsp.Location, error) {
return editor.Language().TypeDefinition(ctx, path, shapeVarLine, shapeVarColumn, shapeVarLineText)
})
if len(locations) != 1 || locations[0].Range.Start.Line != circleLine {
t.Errorf("the type of `shape` is defined at %v, want line %d (class Circle)", locations, circleLine)
}
}
func TestHoverShowsTheDocCommentAboveADeclarationWithRealServer(t *testing.T) {
// A JSDoc block above a function is its documentation, and the server
// shows it on hover. This is what F1 — Code ▸ Describe symbol — draws, and
// it is the one answer here that carries prose a person wrote.
root, editor := startRealServer(t)
path := filepath.Join(root, "main.js")
var text string
waitUntil(t, 30*time.Second, func() bool {
ctx, cancel := context.WithTimeout(t.Context(), 5*time.Second)
defer cancel()
answer, err := editor.Language().Hover(ctx, path, callLine, callColumn, callLineText)
if err != nil {
return false
}
text = answer
return strings.Contains(text, "Adds one")
})
if !strings.Contains(text, "Adds one") {
t.Errorf("hovering helper gave %q, want the comment written above its declaration", text)
}
}
func TestTheSymbolsOfAFileWithRealServer(t *testing.T) {
root, editor := startRealServer(t)
path := filepath.Join(root, "main.js")
var symbols []lsp.Symbol
waitUntil(t, 30*time.Second, func() bool {
ctx, cancel := context.WithTimeout(t.Context(), 5*time.Second)
defer cancel()
found, err := editor.Language().DocumentSymbols(ctx, path)
if err != nil {
return false
}
symbols = found
return len(symbols) > 0
})
names := map[string]bool{}
for _, symbol := range symbols {
names[symbol.Name] = true
}
for _, want := range []string{"helper", "first", "second", "Shape", "Circle", "Square", "main"} {
if !names[want] {
t.Errorf("the file's symbols do not include %q: %v", want, names)
}
}
}
func TestAProjectWideSymbolSearchWithRealServer(t *testing.T) {
// Ctrl-T. The server indexes the project it was started in, so the
// answer names the file the symbol is declared in.
_, editor := startRealServer(t)
var symbols []lsp.Symbol
waitUntil(t, 30*time.Second, func() bool {
ctx, cancel := context.WithTimeout(t.Context(), 5*time.Second)
defer cancel()
found, err := editor.Language().WorkspaceSymbols(ctx, "helper")
if err != nil {
return false
}
symbols = found
return len(symbols) > 0
})
found := false
for _, symbol := range symbols {
if symbol.Name == "helper" {
found = true
}
}
if !found {
t.Errorf("a project-wide search for helper found %v", symbols)
}
}
// Diagnostics are the one thing a language server sends without being asked,
// and the only feature whose failure looks exactly like success: an editor with
// no error to show and one that cannot find the error are the same blank
// gutter. So this opens a file that does not parse and waits for the mark.
func TestDiagnosticsForAFileThatDoesNotParseWithRealServer(t *testing.T) {
root, editor := startRealServerOn(t, brokenScript)
path := filepath.Join(root, "main.js")
waitUntil(t, 30*time.Second, func() bool {
editor.Tick()
return len(editor.Language().Diagnostics(path)) > 0
})
problems := editor.Language().Diagnostics(path)
if len(problems) == 0 {
t.Fatalf("no diagnostic ever arrived for %s; the status bar says %q", path, editor.StatusBar().Message())
}
if _, ok := editor.Language().FirstError(path); !ok {
t.Errorf("the diagnostics hold no error, only %v", problems)
}
}
// --- the fixtures and the waiting -------------------------------------------
// realScript is the file every language-server test works against. Line
// numbers are counted from zero and are named by the constants below, so
// inserting a line here moves them and the constants have to move too.
//
// It runs under node with no error, which matters: a fixture the runtime
// complains about would make the diagnostics test pass for the wrong reason.
const realScript = "// A tiny module.\n" + // 0
"\n" + // 1
"/** Adds one. */\n" + // 2
"function helper(x) {\n" + // 3
" return x + 1;\n" + // 4
"}\n" + // 5
"\n" + // 6
"function first(x) {\n" + // 7
" return helper(x);\n" + // 8
"}\n" + // 9
"\n" + // 10
"function second(x) {\n" + // 11
" return helper(x) * 2;\n" + // 12
"}\n" + // 13
"\n" + // 14
"class Shape {\n" + // 15
" area() {\n" + // 16
" return 0;\n" + // 17
" }\n" + // 18
"}\n" + // 19
"\n" + // 20
"class Circle extends Shape {\n" + // 21
" area() {\n" + // 22
" return 3;\n" + // 23
" }\n" + // 24
"}\n" + // 25
"\n" + // 26
"class Square extends Shape {\n" + // 27
" area() {\n" + // 28
" return 4;\n" + // 29
" }\n" + // 30
"}\n" + // 31
"\n" + // 32
"\n" + // 33 ← where the declaration is typed, at top level
"\n" + // 34
"function main() {\n" + // 35
" const text = \"hi\";\n" + // 36
" const shape = new Circle();\n" + // 37
" \n" + // 38 ← two spaces, and where the completion is typed
" console.log(first(1) + second(2) + text, shape.area());\n" + // 39
"}\n" + // 40
"\n" + // 41
"main();\n" // 42
// brokenScript is a file that does not parse: the parenthesis of main's
// parameter list is never closed. It exists as a second fixture rather than as
// a line added to the first, because a file holding a syntax error is a file
// whose *other* answers are worth nothing: the completion test would then be
// measuring a parse that never finished.
const brokenScript = "// Does not parse.\n" +
"\n" +
"function main( {\n" +
" const x = (1 +\n"
// Where the fixture's interesting lines are, counted from zero.
const (
helperLine = 3
helperColumn = 9
helperLineText = "function helper(x) {"
callLine = 8
callColumn = 9
callLineText = " return helper(x);"
firstCallLine = 8
secondCallLine = 12
shapeLine = 15
shapeColumn = 6
shapeLineText = "class Shape {"
circleLine = 21
squareLine = 27
declarationLine = 33
shapeVarLine = 37
shapeVarColumn = 8
shapeVarLineText = " const shape = new Circle();"
completionLine = 38
)
// startRealServer writes a project, opens its file, starts the server and
// waits for it, in the order the command does. It skips the test when the
// server is missing.
func startRealServer(t *testing.T) (root string, editor *app.App) {
t.Helper()
return startRealServerOn(t, realScript)
}
// startRealServerOn is startRealServer over a chosen main.js.
func startRealServerOn(t *testing.T, source string) (root string, editor *app.App) {
t.Helper()
if testing.Short() {
t.Skip("-short: not starting a language server")
}
server, err := lsp.FindServer(jslang.Profile().Server)
if errors.Is(err, lsp.ErrServerNotFound) {
t.Skipf("%s is not installed; %s", jslang.ServerCommand, jslang.InstallHint)
}
// Finding it is not the same as being able to run it: a shim left behind
// by a version manager whose Node has since been removed is on PATH and
// fails only when started.
if !serverRuns(server) {
t.Skipf("%s at %s cannot run; %s", jslang.ServerCommand, server, jslang.InstallHint)
}
root = t.TempDir()
writeFile(t, filepath.Join(root, "package.json"), "{\n \"name\": \"demo\",\n \"type\": \"commonjs\"\n}\n")
writeFile(t, filepath.Join(root, "main.js"), source)
editor = newTestEditor(t)
// 1. Open the file, exactly as main does — before there is any server.
editor.Open(filepath.Join(root, "main.js"))
// 2. Start the language server, exactly as main does — afterwards, in the
// directory holding package.json, which is what ProjectRoot answers.
ctx, cancel := context.WithCancel(t.Context())
t.Cleanup(cancel)
editor.StartLanguageServer(ctx, root)
t.Cleanup(func() { editor.Language().Stop(context.Background()) })
waitUntilReady(t, editor)
// 3. Let the event loop notice the server is ready, as Run does on every
// turn. This is what announces the file that was already open.
editor.Tick()
return root, editor
}
// newTestEditor returns Turbo JS drawing on a simulated terminal, set up the
// way the command sets it up.
func newTestEditor(t *testing.T) *app.App {
t.Helper()
jslang.Register()
screen := tcell.NewSimulationScreen("UTF-8")
if err := screen.Init(); err != nil {
t.Fatalf("initialising the simulation screen: %v", err)
}
t.Cleanup(screen.Fini)
screen.SetSize(80, 24)
// Never read the themes or snippets of whoever is running the tests.
p := jslang.Profile()
t.Setenv(p.ThemeDirEnvVar(), t.TempDir())
t.Setenv(p.SnippetDirEnvVar(), t.TempDir())
editor := app.New(screen, "turbo-classic", p)
editor.Render()
return editor
}
// coloured reports whether a rune column on a line carries a class.
func coloured(spans []syntax.Span, col int, want syntax.Class) bool {
for _, span := range spans {
if span.Start <= col && col < span.End {
return span.Class == want
}
}
return false
}
// typeText sends a run of printable characters through the whole routing chain.
func typeText(editor *app.App, text string) {
for _, r := range text {
editor.Handle(tcell.NewEventKey(tcell.KeyRune, r, tcell.ModNone))
}
}
// completionOffers reports whether the open popup holds an entry starting with
// a label.
func completionOffers(editor *app.App, label string) bool {
for _, item := range editor.Completion().Matches() {
if strings.HasPrefix(item.Label, label) {
return true
}
}
return false
}
// waitUntilReady blocks until the language server has finished starting.
func waitUntilReady(t *testing.T, editor *app.App) {
t.Helper()
deadline := time.After(lsp.InitializeTimeout)
for !editor.Language().Ready() {
select {
case <-deadline:
t.Fatalf("the language server never became ready: %s", editor.Language().Status())
case <-time.After(10 * time.Millisecond):
}
}
}
// waitUntil polls a condition until it holds or the time runs out, and fails
// the test if it never does.
func waitUntil(t *testing.T, within time.Duration, done func() bool) {
t.Helper()
deadline := time.Now().Add(within)
for time.Now().Before(deadline) {
if done() {
return
}
time.Sleep(200 * time.Millisecond)
}
t.Errorf("the server never answered within %s", within)
}
// waitForLocations asks a location question until it is answered, because a
// server that is still loading its project answers an empty list rather than
// an error.
func waitForLocations(t *testing.T, ask func(context.Context) ([]lsp.Location, error)) []lsp.Location {
t.Helper()
var found []lsp.Location
waitUntil(t, 30*time.Second, func() bool {
ctx, cancel := context.WithTimeout(t.Context(), 5*time.Second)
defer cancel()
locations, err := ask(ctx)
if err != nil {
return false
}
found = locations
return len(found) > 0
})
return found
}
// waitForCompletion asks for a completion until one arrives, or gives up.
//
// tsserver loads its project after it has finished initialising, and answers
// an empty list until that is done. There is no notification this client reads
// that says when — so it asks again, which is what the editor's user would do.
func waitForCompletion(t *testing.T, editor *app.App) bool {
t.Helper()
deadline := time.Now().Add(60 * time.Second)
for time.Now().Before(deadline) {
if editor.Completion().Visible() {
return true
}
editor.RequestCompletion()
if editor.Completion().Visible() {
return true
}
time.Sleep(500 * time.Millisecond)
}
return false
}
// serverRuns reports whether the language server at path actually starts.
func serverRuns(path string) bool {
return exec.Command(path, "--version").Run() == nil
}
// writeFile creates a file, making its directory first.
func writeFile(t *testing.T, path, content string) {
t.Helper()
if err := os.MkdirAll(filepath.Dir(path), 0o755); err != nil {
t.Fatalf("creating %s: %v", filepath.Dir(path), err)
}
if err := os.WriteFile(path, []byte(content), 0o644); err != nil {
t.Fatalf("writing %s: %v", path, err)
}
}
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