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test-parse-module.cpp
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// Copyright (C) 2020 Matthew "strager" Glazar
// See end of file for extended copyright information.
#include <gmock/gmock.h>
#include <gtest/gtest.h>
#include <quick-lint-js/array.h>
#include <quick-lint-js/cli/cli-location.h>
#include <quick-lint-js/container/concat.h>
#include <quick-lint-js/container/padded-string.h>
#include <quick-lint-js/diag-collector.h>
#include <quick-lint-js/diag-matcher.h>
#include <quick-lint-js/diag/diagnostic-types.h>
#include <quick-lint-js/fe/language.h>
#include <quick-lint-js/fe/parse.h>
#include <quick-lint-js/parse-support.h>
#include <quick-lint-js/port/char8.h>
#include <quick-lint-js/spy-visitor.h>
#include <string>
#include <string_view>
#include <vector>
using ::testing::ElementsAre;
using ::testing::ElementsAreArray;
using ::testing::IsEmpty;
using ::testing::UnorderedElementsAre;
namespace quick_lint_js {
namespace {
class test_parse_module : public test_parse_expression {};
TEST_F(test_parse_module, export_variable) {
{
test_parser p(u8"export let x;"_sv);
p.parse_and_visit_statement();
EXPECT_THAT(p.visits, ElementsAreArray({
"visit_variable_declaration",
}));
EXPECT_THAT(p.variable_declarations,
ElementsAreArray({let_noinit_decl(u8"x"_sv)}));
}
{
test_parser p(u8"export let x = 42;"_sv);
p.parse_and_visit_statement();
EXPECT_THAT(p.visits, ElementsAreArray({
"visit_variable_declaration",
}));
EXPECT_THAT(p.variable_declarations,
ElementsAreArray({let_init_decl(u8"x"_sv)}));
}
{
test_parser p(u8"export var x;"_sv);
p.parse_and_visit_statement();
EXPECT_THAT(p.visits, ElementsAreArray({
"visit_variable_declaration",
}));
EXPECT_THAT(p.variable_declarations,
ElementsAreArray({var_noinit_decl(u8"x"_sv)}));
}
{
test_parser p(u8"export var x = 42;"_sv);
p.parse_and_visit_statement();
EXPECT_THAT(p.visits, ElementsAreArray({
"visit_variable_declaration",
}));
EXPECT_THAT(p.variable_declarations,
ElementsAreArray({var_init_decl(u8"x"_sv)}));
}
{
test_parser p(u8"export const x = null;"_sv);
p.parse_and_visit_statement();
EXPECT_THAT(p.visits, ElementsAreArray({
"visit_variable_declaration",
}));
EXPECT_THAT(p.variable_declarations,
ElementsAreArray({const_init_decl(u8"x"_sv)}));
}
}
TEST_F(test_parse_module, export_default) {
{
test_parser p(u8"export default x;"_sv);
p.parse_and_visit_statement();
EXPECT_THAT(p.visits, ElementsAreArray({
"visit_variable_use",
}));
}
{
test_parser p(u8"export default function f() {}"_sv);
p.parse_and_visit_statement();
EXPECT_THAT(p.visits, ElementsAreArray({
"visit_variable_declaration", // f
"visit_enter_function_scope", //
"visit_enter_function_scope_body", //
"visit_exit_function_scope",
}));
}
{
test_parser p(u8"export default function() {}"_sv);
p.parse_and_visit_statement();
EXPECT_THAT(p.visits, ElementsAreArray({
"visit_enter_function_scope", //
"visit_enter_function_scope_body", //
"visit_exit_function_scope",
}));
}
{
test_parser p(u8"export default async function f() {}"_sv);
p.parse_and_visit_statement();
EXPECT_THAT(p.visits, ElementsAreArray({
"visit_variable_declaration", // f
"visit_enter_function_scope", //
"visit_enter_function_scope_body", //
"visit_exit_function_scope",
}));
}
{
test_parser p(u8"export default async function() {}"_sv);
p.parse_and_visit_statement();
EXPECT_THAT(p.visits, ElementsAreArray({
"visit_enter_function_scope", //
"visit_enter_function_scope_body", //
"visit_exit_function_scope",
}));
}
{
test_parser p(u8"export default (function f() {})"_sv);
p.parse_and_visit_statement();
EXPECT_THAT(p.visits, ElementsAreArray({
"visit_enter_named_function_scope", // f
"visit_enter_function_scope_body", //
"visit_exit_function_scope",
}));
}
{
test_parser p(u8"export default class C {}"_sv);
p.parse_and_visit_statement();
EXPECT_THAT(p.visits, ElementsAreArray({
"visit_enter_class_scope", //
"visit_enter_class_scope_body", //
"visit_exit_class_scope",
"visit_variable_declaration", // C
}));
}
{
test_parser p(u8"export default class {}"_sv);
p.parse_and_visit_statement();
EXPECT_THAT(p.visits, ElementsAreArray({
"visit_enter_class_scope", //
"visit_enter_class_scope_body", //
"visit_exit_class_scope",
}));
}
{
test_parser p(u8"export default async (a) => b;"_sv);
p.parse_and_visit_statement();
EXPECT_THAT(p.visits, ElementsAreArray({
"visit_enter_function_scope", //
"visit_variable_declaration", // a
"visit_enter_function_scope_body",
"visit_variable_use", // b
"visit_exit_function_scope",
}));
}
}
TEST_F(test_parse_module, export_default_of_variable_is_illegal) {
for (string8 declaration_kind : {u8"const", u8"let", u8"var"}) {
test_parser p(
concat(u8"export default "_sv, declaration_kind, u8" x = y;"_sv),
capture_diags);
SCOPED_TRACE(p.code);
p.parse_and_visit_statement();
EXPECT_THAT(p.visits, ElementsAreArray({
"visit_variable_use", // y
"visit_variable_declaration", // x
}));
EXPECT_THAT(
p.errors,
ElementsAreArray({
DIAG_TYPE_OFFSETS(p.code, diag_cannot_export_default_variable, //
declaring_token, strlen(u8"export default "),
declaration_kind),
}));
}
}
TEST_F(test_parse_module, export_sometimes_requires_semicolon) {
{
test_parser p(u8"export {x} console.log();"_sv, capture_diags);
p.parse_and_visit_module();
EXPECT_THAT(p.visits, ElementsAreArray({
"visit_variable_export_use", // x
"visit_variable_use", // console
"visit_end_of_module",
}));
EXPECT_THAT(p.errors,
ElementsAreArray({
DIAG_TYPE_OFFSETS(
p.code, diag_missing_semicolon_after_statement, //
where, strlen(u8"export {x}"), u8""_sv),
}));
}
{
test_parser p(u8"export * from 'other' console.log();"_sv, capture_diags);
p.parse_and_visit_module();
EXPECT_THAT(p.visits, ElementsAreArray({
"visit_variable_use", // console
"visit_end_of_module",
}));
EXPECT_THAT(p.errors,
ElementsAreArray({
DIAG_TYPE_OFFSETS(
p.code, diag_missing_semicolon_after_statement, //
where, strlen(u8"export * from 'other'"), u8""_sv),
}));
}
{
test_parser p(u8"export default x+y console.log();"_sv, capture_diags);
p.parse_and_visit_module();
EXPECT_THAT(p.visits, ElementsAreArray({
"visit_variable_use", // x
"visit_variable_use", // y
"visit_variable_use", // console
"visit_end_of_module",
}));
EXPECT_THAT(p.errors,
ElementsAreArray({
DIAG_TYPE_OFFSETS(
p.code, diag_missing_semicolon_after_statement, //
where, strlen(u8"export default x+y"), u8""_sv),
}));
}
{
test_parser p(u8"export default async () => {} console.log();"_sv,
capture_diags);
p.parse_and_visit_module();
EXPECT_THAT(p.visits, ElementsAreArray({
"visit_enter_function_scope", //
"visit_enter_function_scope_body", //
"visit_exit_function_scope", //
"visit_variable_use", // console
"visit_end_of_module",
}));
EXPECT_THAT(
p.errors,
ElementsAreArray({
DIAG_TYPE_OFFSETS(
p.code, diag_missing_semicolon_after_statement, //
where, strlen(u8"export default async () => {}"), u8""_sv),
}));
}
}
TEST_F(test_parse_module, export_sometimes_does_not_require_semicolon) {
{
test_parser p(u8"export default async function f() {} console.log();"_sv,
capture_diags);
p.parse_and_visit_module();
EXPECT_THAT(p.visits, ElementsAreArray({
"visit_variable_declaration", // f
"visit_enter_function_scope", //
"visit_enter_function_scope_body", //
"visit_exit_function_scope", //
"visit_variable_use", // console
"visit_end_of_module",
}));
EXPECT_THAT(p.errors, IsEmpty());
}
{
test_parser p(u8"export default function() {} console.log();"_sv,
capture_diags);
p.parse_and_visit_module();
EXPECT_THAT(p.visits, ElementsAreArray({
"visit_enter_function_scope", //
"visit_enter_function_scope_body", //
"visit_exit_function_scope", //
"visit_variable_use", // console
"visit_end_of_module",
}));
EXPECT_THAT(p.errors, IsEmpty());
}
}
TEST_F(test_parse_module, export_list) {
{
test_parser p(u8"export {one, two};"_sv);
p.parse_and_visit_statement();
EXPECT_THAT(p.visits, ElementsAreArray({
"visit_variable_export_use", // one
"visit_variable_export_use", // two
}));
}
{
test_parser p(u8"export {one as two, three as four};"_sv);
p.parse_and_visit_statement();
EXPECT_THAT(p.visits, ElementsAreArray({
"visit_variable_export_use", // one
"visit_variable_export_use", // three
}));
EXPECT_THAT(p.variable_uses, ElementsAreArray({u8"one", u8"three"}));
}
{
test_parser p(u8"export {myVar as 'name'};"_sv);
p.parse_and_visit_statement();
EXPECT_THAT(p.variable_uses, ElementsAreArray({u8"myVar"}));
}
}
TEST_F(test_parse_module,
exporting_by_string_name_is_only_allowed_for_export_from) {
{
test_parser p(u8"export {'name'};"_sv, capture_diags);
p.parse_and_visit_statement();
EXPECT_THAT(p.visits, IsEmpty());
EXPECT_THAT(
p.errors,
ElementsAreArray({
DIAG_TYPE_OFFSETS(
p.code,
diag_exporting_string_name_only_allowed_for_export_from, //
export_name, strlen(u8"export {"), u8"'name'"_sv),
}));
}
}
TEST_F(test_parse_module,
exported_variables_cannot_be_named_reserved_keywords) {
for (string8 keyword : strict_reserved_keywords) {
test_parser p(concat(u8"export {"_sv, keyword, u8"};"_sv), capture_diags);
SCOPED_TRACE(p.code);
p.parse_and_visit_statement();
EXPECT_THAT(p.visits, IsEmpty());
EXPECT_THAT(p.variable_uses, IsEmpty());
EXPECT_THAT(p.errors,
ElementsAreArray({
DIAG_TYPE_OFFSETS(
p.code, diag_cannot_export_variable_named_keyword, //
export_name, strlen(u8"export {"), keyword),
}));
}
for (string8 keyword : strict_reserved_keywords) {
test_parser p(concat(u8"export {"_sv, keyword, u8" as thing};"_sv),
capture_diags);
SCOPED_TRACE(p.code);
p.parse_and_visit_statement();
EXPECT_THAT(p.visits, IsEmpty());
EXPECT_THAT(p.variable_uses, IsEmpty());
EXPECT_THAT(p.errors,
ElementsAreArray({
DIAG_TYPE_OFFSETS(
p.code, diag_cannot_export_variable_named_keyword, //
export_name, strlen(u8"export {"), keyword),
}));
}
// TODO(strager): Test u8"await" and u8"yield".
// TODO(#73): Disallow 'protected', 'implements', etc.
for (string8 keyword : disallowed_binding_identifier_keywords) {
string8 exported_variable = escape_first_character_in_keyword(keyword);
{
test_parser p(concat(u8"export {"_sv, exported_variable, u8"};"_sv),
capture_diags);
SCOPED_TRACE(p.code);
p.parse_and_visit_statement();
EXPECT_THAT(p.variable_uses, IsEmpty());
EXPECT_THAT(
p.errors,
ElementsAreArray({
DIAG_TYPE_OFFSETS(
p.code, diag_keywords_cannot_contain_escape_sequences, //
escape_sequence, strlen(u8"export {"), u8"\\u{??}"_sv),
}));
}
{
test_parser p(
concat(u8"export {"_sv, exported_variable, u8" as thing};"_sv),
capture_diags);
SCOPED_TRACE(p.code);
p.parse_and_visit_statement();
EXPECT_THAT(p.variable_uses, IsEmpty());
EXPECT_THAT(
p.errors,
ElementsAreArray({
DIAG_TYPE_OFFSETS(
p.code, diag_keywords_cannot_contain_escape_sequences, //
escape_sequence, strlen(u8"export {"), u8"\\u{??}"_sv),
}));
}
}
}
TEST_F(test_parse_module, export_from) {
{
test_parser p(u8"export * from 'other';"_sv);
p.parse_and_visit_statement();
EXPECT_THAT(p.visits, IsEmpty());
}
{
test_parser p(u8"export * as mother from 'other';"_sv);
p.parse_and_visit_statement();
EXPECT_THAT(p.visits, IsEmpty());
}
{
test_parser p(u8"export * as 'mother' from 'other';"_sv);
p.parse_and_visit_statement();
EXPECT_THAT(p.visits, IsEmpty());
}
{
test_parser p(u8"export {} from 'other';"_sv);
p.parse_and_visit_statement();
EXPECT_THAT(p.visits, IsEmpty());
}
{
test_parser p(u8"export {util1, util2, util3} from 'other';"_sv);
p.parse_and_visit_statement();
EXPECT_THAT(p.visits, IsEmpty());
}
{
test_parser p(u8"export {readFileSync as readFile} from 'fs';"_sv);
p.parse_and_visit_statement();
EXPECT_THAT(p.visits, IsEmpty());
}
{
test_parser p(u8"export {promises as default} from 'fs';"_sv);
p.parse_and_visit_statement();
EXPECT_THAT(p.visits, IsEmpty());
}
for (string8 keyword : keywords) {
padded_string code(
concat(u8"export {"_sv, keyword, u8"} from 'other';"_sv));
SCOPED_TRACE(code);
test_parser p(code.string_view());
p.parse_and_visit_statement();
EXPECT_THAT(p.visits, IsEmpty());
}
{
// Keywords are legal, even if Unicode-escaped.
test_parser p(u8"export {\\u{76}ar} from 'fs';"_sv);
p.parse_and_visit_statement();
EXPECT_THAT(p.visits, IsEmpty());
}
{
// Keywords are legal, even if Unicode-escaped.
test_parser p(u8"export {\\u{76}ar as \\u{69}f} from 'fs';"_sv);
p.parse_and_visit_statement();
EXPECT_THAT(p.visits, IsEmpty());
}
{
test_parser p(u8"export {'name'} from 'other';"_sv);
p.parse_and_visit_statement();
EXPECT_THAT(p.visits, IsEmpty());
}
{
test_parser p(u8"export {'name' as 'othername'} from 'other';"_sv);
p.parse_and_visit_statement();
EXPECT_THAT(p.visits, IsEmpty());
}
}
TEST_F(test_parse_module, invalid_export_expression) {
{
test_parser p(u8"export stuff;"_sv, capture_diags);
p.parse_and_visit_statement();
EXPECT_THAT(
p.errors,
ElementsAreArray({
DIAG_TYPE_OFFSETS(p.code, diag_exporting_requires_curlies, //
names, strlen(u8"export "), u8"stuff"_sv),
}));
EXPECT_THAT(p.visits, ElementsAreArray({
"visit_variable_use", // stuff
}));
}
{
test_parser p(u8"export a, b, c;"_sv, capture_diags);
p.parse_and_visit_statement();
EXPECT_THAT(
p.errors,
ElementsAreArray({
DIAG_TYPE_OFFSETS(p.code, diag_exporting_requires_default, //
expression, strlen(u8"export "), u8"a, b, c"_sv),
}));
EXPECT_THAT(p.visits, ElementsAreArray({
"visit_variable_use", // a
"visit_variable_use", // b
"visit_variable_use", // c
}));
}
{
test_parser p(u8"export a, b, c+d;"_sv, capture_diags);
p.parse_and_visit_statement();
EXPECT_THAT(p.errors,
ElementsAreArray({
DIAG_TYPE_OFFSETS(
p.code, diag_exporting_requires_default, //
expression, strlen(u8"export "), u8"a, b, c+d"_sv),
}));
EXPECT_THAT(p.visits, ElementsAreArray({
"visit_variable_use", // a
"visit_variable_use", // b
"visit_variable_use", // c
"visit_variable_use", // d
}));
}
{
test_parser p(u8"export 2 + x;"_sv, capture_diags);
p.parse_and_visit_statement();
EXPECT_THAT(
p.errors,
ElementsAreArray({
DIAG_TYPE_OFFSETS(p.code, diag_exporting_requires_default, //
expression, strlen(u8"export "), u8"2 + x"_sv),
}));
EXPECT_THAT(p.visits, ElementsAreArray({
"visit_variable_use", // x
}));
}
}
TEST_F(test_parse_module, invalid_export) {
{
test_parser p(u8"export ;"_sv, capture_diags);
p.parse_and_visit_statement();
EXPECT_THAT(
p.errors,
ElementsAreArray({
DIAG_TYPE_OFFSETS(p.code, diag_missing_token_after_export, //
export_token, 0, u8"export"_sv),
}));
EXPECT_THAT(p.visits, IsEmpty());
}
{
test_parser p(u8"export "_sv, capture_diags);
p.parse_and_visit_statement();
EXPECT_THAT(
p.errors,
ElementsAreArray({
DIAG_TYPE_OFFSETS(p.code, diag_missing_token_after_export, //
export_token, 0, u8"export"_sv),
}));
EXPECT_THAT(p.visits, IsEmpty());
}
{
test_parser p(u8"export += x"_sv, capture_diags);
p.parse_and_visit_statement();
EXPECT_THAT(
p.errors,
ElementsAreArray({
DIAG_TYPE_OFFSETS(p.code, diag_unexpected_token_after_export, //
unexpected_token, strlen(u8"export "), u8"+="_sv),
}));
p.parse_and_visit_statement(); // Parse '+= x'.
EXPECT_THAT(p.visits, ElementsAreArray({
"visit_variable_use", // x
}));
}
}
TEST_F(test_parse_module, parse_and_visit_import) {
{
test_parser p(u8"import 'foo';"_sv);
p.parse_and_visit_statement();
EXPECT_THAT(p.visits, IsEmpty());
}
{
test_parser p(u8"import fs from 'fs'"_sv);
p.parse_and_visit_statement();
EXPECT_THAT(p.variable_declarations,
ElementsAreArray({import_decl(u8"fs"_sv)}));
}
{
test_parser p(u8"import * as fs from 'fs'"_sv);
p.parse_and_visit_statement();
EXPECT_THAT(p.variable_declarations,
ElementsAreArray({import_decl(u8"fs"_sv)}));
}
{
test_parser p(u8"import fs from 'fs'; import net from 'net';"_sv,
capture_diags);
p.parse_and_visit_statement();
p.parse_and_visit_statement();
EXPECT_THAT(
p.variable_declarations,
ElementsAreArray({import_decl(u8"fs"_sv), import_decl(u8"net"_sv)}));
EXPECT_THAT(p.errors, IsEmpty());
}
{
test_parser p(u8"import { readFile, writeFile } from 'fs';"_sv);
p.parse_and_visit_statement();
EXPECT_THAT(p.variable_declarations,
ElementsAreArray({import_decl(u8"readFile"_sv),
import_decl(u8"writeFile"_sv)}));
}
{
test_parser p(u8"import {readFileSync as rf} from 'fs';"_sv);
p.parse_and_visit_statement();
ASSERT_EQ(p.variable_declarations.size(), 1);
EXPECT_THAT(p.variable_declarations,
ElementsAreArray({import_decl(u8"rf"_sv)}));
}
{
test_parser p(u8"import {'read file sync' as readFileSync} from 'fs';"_sv);
p.parse_and_visit_statement();
EXPECT_THAT(p.variable_declarations,
ElementsAreArray({import_decl(u8"readFileSync"_sv)}));
}
{
test_parser p(u8"import fs, {readFileSync} from 'fs';"_sv);
p.parse_and_visit_statement();
EXPECT_THAT(p.variable_declarations,
ElementsAreArray({import_decl(u8"fs"_sv),
import_decl(u8"readFileSync"_sv)}));
}
{
test_parser p(u8"import fsDefault, * as fsExports from 'fs';"_sv);
p.parse_and_visit_statement();
EXPECT_THAT(p.variable_declarations,
ElementsAreArray({import_decl(u8"fsDefault"_sv),
import_decl(u8"fsExports"_sv)}));
}
}
TEST_F(test_parse_module, import_star_without_as_keyword) {
{
test_parser p(u8"import * myExport from 'other';"_sv, capture_diags);
p.parse_and_visit_statement();
EXPECT_THAT(p.errors,
ElementsAreArray({
DIAG_TYPE_3_OFFSETS(
p.code,
diag_expected_as_before_imported_namespace_alias, //
star_through_alias_token, strlen(u8"import "),
u8"* myExport"_sv, //
star_token, strlen(u8"import "), u8"*"_sv, //
alias, strlen(u8"import * "), u8"myExport"_sv),
}));
EXPECT_THAT(p.visits, ElementsAreArray({
"visit_variable_declaration", // myExport
}));
}
}
TEST_F(test_parse_module, import_without_from_keyword) {
{
test_parser p(u8"import { x } 'other';"_sv, capture_diags);
p.parse_and_visit_statement();
EXPECT_THAT(
p.errors,
ElementsAreArray({
DIAG_TYPE_OFFSETS(
p.code, diag_expected_from_before_module_specifier, //
module_specifier, strlen(u8"import { x } "), u8"'other'"_sv),
}));
EXPECT_THAT(p.visits, ElementsAreArray({
"visit_variable_declaration", // x
}));
}
{
test_parser p(u8"import { x } ;"_sv, capture_diags);
p.parse_and_visit_statement();
EXPECT_THAT(p.errors,
ElementsAreArray({
DIAG_TYPE_OFFSETS(
p.code, diag_expected_from_and_module_specifier, //
where, strlen(u8"import { x }"), u8""_sv),
}));
EXPECT_THAT(p.visits, ElementsAreArray({
"visit_variable_declaration", // x
}));
}
}
TEST_F(test_parse_module, import_as_invalid_token) {
{
test_parser p(u8"import {myExport as 'string'} from 'module';"_sv,
capture_diags);
p.parse_and_visit_statement();
EXPECT_THAT(p.errors,
ElementsAreArray({
DIAG_TYPE_OFFSETS(
p.code, diag_expected_variable_name_for_import_as, //
unexpected_token, strlen(u8"import {myExport as "),
u8"'string'"_sv),
}));
}
{
test_parser p(u8"import {'myExport' as 'string'} from 'module';"_sv,
capture_diags);
p.parse_and_visit_statement();
EXPECT_THAT(p.errors,
ElementsAreArray({
DIAG_TYPE_OFFSETS(
p.code, diag_expected_variable_name_for_import_as, //
unexpected_token, strlen(u8"import {'myExport' as "),
u8"'string'"_sv),
}));
}
}
TEST_F(test_parse_module, export_function) {
{
test_parser p(u8"export function foo() {}"_sv);
p.parse_and_visit_statement();
EXPECT_THAT(p.variable_declarations,
ElementsAreArray({function_decl(u8"foo"_sv)}));
}
{
test_parser p(u8"export async function foo() {}"_sv);
p.parse_and_visit_statement();
EXPECT_THAT(p.variable_declarations,
ElementsAreArray({function_decl(u8"foo"_sv)}));
}
}
TEST_F(test_parse_module, export_function_requires_a_name) {
{
test_parser p(u8"export function() {}"_sv, capture_diags);
p.parse_and_visit_statement();
EXPECT_THAT(p.visits, ElementsAreArray({
"visit_enter_function_scope", //
"visit_enter_function_scope_body", //
"visit_exit_function_scope",
}));
EXPECT_THAT(p.errors,
ElementsAreArray({
DIAG_TYPE_OFFSETS(
p.code, diag_missing_name_of_exported_function, //
function_keyword, strlen(u8"export "), u8"function"_sv),
}));
}
{
test_parser p(u8"export async function() {}"_sv, capture_diags);
p.parse_and_visit_statement();
EXPECT_THAT(p.visits, ElementsAreArray({
"visit_enter_function_scope", //
"visit_enter_function_scope_body", //
"visit_exit_function_scope",
}));
EXPECT_THAT(
p.errors,
ElementsAreArray({
DIAG_TYPE_OFFSETS(
p.code, diag_missing_name_of_exported_function, //
function_keyword, strlen(u8"export async "), u8"function"_sv),
}));
}
}
TEST_F(test_parse_module, export_class) {
{
test_parser p(u8"export class C {}"_sv);
p.parse_and_visit_statement();
EXPECT_THAT(p.variable_declarations,
ElementsAreArray({class_decl(u8"C"_sv)}));
}
}
TEST_F(test_parse_module, export_class_requires_a_name) {
{
test_parser p(u8"export class {}"_sv, capture_diags);
p.parse_and_visit_statement();
EXPECT_THAT(p.visits, ElementsAreArray({
"visit_enter_class_scope", //
"visit_enter_class_scope_body", //
"visit_exit_class_scope",
}));
EXPECT_THAT(
p.errors,
ElementsAreArray({
DIAG_TYPE_OFFSETS(p.code, diag_missing_name_of_exported_class, //
class_keyword, strlen(u8"export "), u8"class"_sv),
}));
}
}
TEST_F(test_parse_module, parse_empty_module) {
test_parser p(u8""_sv, capture_diags);
p.parse_and_visit_module();
EXPECT_THAT(p.errors, IsEmpty());
EXPECT_THAT(p.visits, ElementsAreArray({
"visit_end_of_module",
}));
}
TEST_F(test_parse_module, imported_variables_can_be_named_contextual_keywords) {
for (string8 name : contextual_keywords - dirty_set<string8>{u8"let"}) {
SCOPED_TRACE(out_string8(name));
{
test_parser p(concat(u8"import { "_sv, name, u8" } from 'other';"_sv));
p.parse_and_visit_statement();
EXPECT_THAT(p.visits, ElementsAreArray({
"visit_variable_declaration", // (name)
}));
}
{
test_parser p(concat(u8"import { exportedName as "_sv, name,
u8" } from 'other';"_sv));
p.parse_and_visit_statement();
EXPECT_THAT(p.visits, ElementsAreArray({
"visit_variable_declaration", // (name)
}));
}
{
test_parser p(concat(u8"import { 'exportedName' as "_sv, name,
u8" } from 'other';"_sv));
p.parse_and_visit_statement();
EXPECT_THAT(p.visits, ElementsAreArray({
"visit_variable_declaration", // (name)
}));
}
{
test_parser p(concat(u8"import "_sv, name, u8" from 'other';"_sv));
p.parse_and_visit_statement();
EXPECT_THAT(p.visits, ElementsAreArray({
"visit_variable_declaration", // (name)
}));
}
{
test_parser p(concat(u8"import * as "_sv, name, u8" from 'other';"_sv));
p.parse_and_visit_statement();
EXPECT_THAT(p.visits, ElementsAreArray({
"visit_variable_declaration", // (name)
}));
}
}
}
TEST_F(test_parse_module, imported_modules_must_be_quoted) {
for (string8 import_name : {u8"module", u8"not_a_keyword"}) {
test_parser p(concat(u8"import { test } from "_sv, import_name, u8";"_sv),
capture_diags);
p.parse_and_visit_statement();
EXPECT_THAT(
p.errors,
ElementsAreArray({
DIAG_TYPE_OFFSETS(p.code, diag_cannot_import_from_unquoted_module,
import_name, strlen(u8"import { test } from "),
import_name),
}));
}
}
TEST_F(test_parse_module,
imported_variables_cannot_be_named_reserved_keywords) {
for (string8 name : strict_reserved_keywords) {
{
test_parser p(concat(u8"import { "_sv, name, u8" } from 'other';"_sv),
capture_diags);
SCOPED_TRACE(p.code);
p.parse_and_visit_statement();
EXPECT_THAT(p.visits, ElementsAreArray({
"visit_variable_declaration", // (name)
}));
EXPECT_THAT(p.errors,
ElementsAreArray({
DIAG_TYPE_OFFSETS(
p.code, diag_cannot_import_variable_named_keyword, //
import_name, strlen(u8"import { "), name),
}));
}
{
test_parser p(concat(u8"import { someFunction as "_sv, name,
u8" } from 'other';"_sv),
capture_diags);
SCOPED_TRACE(p.code);
p.parse_and_visit_statement();
EXPECT_THAT(p.visits, ElementsAreArray({
"visit_variable_declaration", // (name)
}));
EXPECT_THAT(
p.errors,
ElementsAreArray({
DIAG_TYPE_OFFSETS(
p.code, diag_cannot_import_variable_named_keyword, //
import_name, strlen(u8"import { someFunction as "), name),
}));
}
{
test_parser p(concat(u8"import { 'someFunction' as "_sv, name,
u8" } from 'other';"_sv),
capture_diags);
SCOPED_TRACE(p.code);
p.parse_and_visit_statement();
EXPECT_THAT(p.variable_declarations,
ElementsAreArray({import_decl(name)}));
EXPECT_THAT(
p.errors,
ElementsAreArray({
DIAG_TYPE_OFFSETS(
p.code, diag_cannot_import_variable_named_keyword, //
import_name, strlen(u8"import { 'someFunction' as "), name),
}));
}
{
test_parser p(concat(u8"import "_sv, name, u8" from 'other';"_sv),
capture_diags);
SCOPED_TRACE(p.code);
p.parse_and_visit_statement();
EXPECT_THAT(p.visits, ElementsAreArray({
"visit_variable_declaration", // (name)
}));
EXPECT_THAT(p.errors,
ElementsAreArray({
DIAG_TYPE_OFFSETS(
p.code, diag_cannot_import_variable_named_keyword, //
import_name, strlen(u8"import "), name),
}));
}
{
test_parser p(concat(u8"import * as "_sv, name, u8" from 'other';"_sv),
capture_diags);
SCOPED_TRACE(p.code);
p.parse_and_visit_statement();
EXPECT_THAT(p.visits, ElementsAreArray({
"visit_variable_declaration", // (name)
}));
EXPECT_THAT(p.errors,
ElementsAreArray({
DIAG_TYPE_OFFSETS(
p.code, diag_cannot_import_variable_named_keyword, //
import_name, strlen(u8"import * as "), name),
}));
}
}
// TODO(strager): Test u8"await" and u8"yield".
// TODO(#73): Disallow 'protected', 'implements', etc.
for (string8 keyword : disallowed_binding_identifier_keywords) {
string8 imported_variable = escape_first_character_in_keyword(keyword);
{
test_parser p(
concat(u8"import { "_sv, imported_variable, u8" } from 'other';"_sv),
capture_diags);
SCOPED_TRACE(p.code);
p.parse_and_visit_statement();
EXPECT_THAT(p.variable_declarations,
ElementsAreArray({import_decl(keyword)}));
EXPECT_THAT(
p.errors,
ElementsAreArray({
DIAG_TYPE_OFFSETS(