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Add syntax check for ES2021 to no-unsupported-features/es-syntax rule #283

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Add syntax check for ES2021 to no-unsupported-features/es-syntax rule #283

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42 changes: 35 additions & 7 deletions .github/workflows/CI.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -31,13 +31,25 @@ jobs:
strategy:
matrix:
os: [ubuntu-latest, windows-latest, macOS-latest]
eslint: [6.x, 5.x]
node: [13.x, 12.x, 10.x, 8.x]
eslint: [7.x, 6.x, 5.x]
node: [14.x, 12.x, 10.x, 8.x]
exclude:
# On Windows, run tests with only the latest LTS environments.
- os: windows-latest
eslint: 7.x
node: 12.x
- os: windows-latest
eslint: 7.x
node: 10.x
- os: windows-latest
eslint: 7.x
node: 8.x
- os: windows-latest
eslint: 6.x
node: 13.x
node: 14.x
- os: windows-latest
eslint: 6.x
node: 12.x
- os: windows-latest
eslint: 6.x
node: 10.x
Expand All @@ -46,7 +58,7 @@ jobs:
node: 8.x
- os: windows-latest
eslint: 5.x
node: 13.x
node: 14.x
- os: windows-latest
eslint: 5.x
node: 12.x
Expand All @@ -57,9 +69,21 @@ jobs:
eslint: 5.x
node: 8.x
# On macOS, run tests with only the latest LTS environments.
- os: macOS-latest
eslint: 7.x
node: 12.x
- os: macOS-latest
eslint: 7.x
node: 10.x
- os: macOS-latest
eslint: 7.x
node: 8.x
- os: macOS-latest
eslint: 6.x
node: 14.x
- os: macOS-latest
eslint: 6.x
node: 13.x
node: 12.x
- os: macOS-latest
eslint: 6.x
node: 10.x
Expand All @@ -68,7 +92,7 @@ jobs:
node: 8.x
- os: macOS-latest
eslint: 5.x
node: 13.x
node: 14.x
- os: macOS-latest
eslint: 5.x
node: 12.x
Expand All @@ -78,10 +102,14 @@ jobs:
- os: macOS-latest
eslint: 5.x
node: 8.x
# Run ESLint 7.x tests on only the supports LTS Node.
- os: ubuntu-latest
eslint: 7.x
node: 8.x
# Run ESLint 5.x tests on only the latest LTS Node.
- os: ubuntu-latest
eslint: 5.x
node: 13.x
node: 12.x
- os: ubuntu-latest
eslint: 5.x
node: 10.x
Expand Down
5 changes: 5 additions & 0 deletions docs/rules/no-unsupported-features/es-syntax.md
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Expand Up @@ -64,6 +64,11 @@ The `"ignores"` option accepts an array of the following strings.

<details>

**ES2021:**

- `"logicalAssignmentOperators"`
- `"numericSeparators"`

**ES2020:**

- `"bigint"`
Expand Down
30 changes: 30 additions & 0 deletions lib/rules/no-unsupported-features/es-syntax.js
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Expand Up @@ -401,6 +401,28 @@ const features = {
},
],
},

//--------------------------------------------------------------------------
// ES2021
//--------------------------------------------------------------------------
logicalAssignmentOperators: {
ruleId: "no-logical-assignment-operators",
cases: [
{
supported: "15.0.0",
messageId: "no-logical-assignment-operators",
},
],
},
numericSeparators: {
ruleId: "no-numeric-separators",
cases: [
{
supported: "12.5.0",
messageId: "no-numeric-separators",
},
],
},
}
const keywords = Object.keys(features)

Expand Down Expand Up @@ -651,6 +673,14 @@ module.exports = {
"Optional chainings are not supported until Node.js {{supported}}. The configured version range is '{{version}}'.",
"no-nullish-coalescing-operators":
"Nullish coalescing operators are not supported until Node.js {{supported}}. The configured version range is '{{version}}'.",

//------------------------------------------------------------------
// ES2021
//------------------------------------------------------------------
"no-logical-assignment-operators":
"Logical assignment operators are not supported until Node.js {{supported}}. The configured version range is '{{version}}'.",
"no-numeric-separators":
"Numeric separators are not supported until Node.js {{supported}}. The configured version range is '{{version}}'.",
},
},
create(context) {
Expand Down
2 changes: 1 addition & 1 deletion package.json
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Expand Up @@ -24,7 +24,7 @@
"devDependencies": {
"@mysticatea/eslint-plugin": "^10.0.3",
"codecov": "^3.3.0",
"eslint": "^6.3.0",
"eslint": "^7.27.0",
"eslint-plugin-node": "file:.",
"fast-glob": "^2.2.6",
"globals": "^11.12.0",
Expand Down
101 changes: 98 additions & 3 deletions tests/lib/rules/no-unsupported-features/es-syntax.js
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Original file line number Diff line number Diff line change
Expand Up @@ -9,12 +9,19 @@ const { Linter, RuleTester } = require("eslint")
const { builtin } = require("globals")
const rule = require("../../../../lib/rules/no-unsupported-features/es-syntax")

const ES2020Supported = (() => {
const config = { parserOptions: { ecmaVersion: 2020 } }
const ES2021Supported = (() => {
const config = { parserOptions: { ecmaVersion: 2021 } }
const messages = new Linter().verify("0n", config)
return messages.length === 0
})()
const ecmaVersion = ES2020Supported ? 2020 : 2019
const ES2020Supported =
ES2021Supported ||
(() => {
const config = { parserOptions: { ecmaVersion: 2020 } }
const messages = new Linter().verify("0n", config)
return messages.length === 0
})()
const ecmaVersion = ES2021Supported ? 2021 : ES2020Supported ? 2020 : 2019

/**
* Makes a file path to a fixture.
Expand Down Expand Up @@ -2563,6 +2570,94 @@ ruleTester.run(
],
},

//----------------------------------------------------------------------
// ES2021
//----------------------------------------------------------------------
{
keyword: "logicalAssignmentOperators",
requiredEcmaVersion: 2021,
valid: [
{
code: "a ||= b",
options: [{ version: "15.0.0" }],
},
{
code: "a &&= b",
options: [{ version: "15.0.0" }],
},
{
code: "a ??= b",
options: [{ version: "15.0.0" }],
},
],
invalid: [
{
code: "a ||= b",
options: [{ version: "14.0.0" }],
errors: [
{
messageId: "no-logical-assignment-operators",
data: {
supported: "15.0.0",
version: "14.0.0",
},
},
],
},
{
code: "a &&= b",
options: [{ version: "14.0.0" }],
errors: [
{
messageId: "no-logical-assignment-operators",
data: {
supported: "15.0.0",
version: "14.0.0",
},
},
],
},
{
code: "a ??= b",
options: [{ version: "14.0.0" }],
errors: [
{
messageId: "no-logical-assignment-operators",
data: {
supported: "15.0.0",
version: "14.0.0",
},
},
],
},
],
},
{
keyword: "numericSeparators",
requiredEcmaVersion: 2021,
valid: [
{
code: "a = 123_456_789",
options: [{ version: "12.5.0" }],
},
],
invalid: [
{
code: "a = 123_456_789",
options: [{ version: "12.4.0" }],
errors: [
{
messageId: "no-numeric-separators",
data: {
supported: "12.5.0",
version: "12.4.0",
},
},
],
},
],
},

//----------------------------------------------------------------------
// MISC
//----------------------------------------------------------------------
Expand Down