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define-custom-blocks-visitor.js
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/**
* @author Yosuke Ota <https://github.com/ota-meshi>
*/
"use strict"
//------------------------------------------------------------------------------
// Requirements
//------------------------------------------------------------------------------
const assert = require("assert")
const path = require("path")
const eslint = require("eslint")
const jsonParser = require("jsonc-eslint-parser")
const espree = require("espree")
const Linter = eslint.Linter
//------------------------------------------------------------------------------
// Helpers
//------------------------------------------------------------------------------
const PARSER_PATH = path.resolve(__dirname, "../src/index.ts")
const LINTER_CONFIG = {
parser: PARSER_PATH,
parserOptions: {
ecmaVersion: 2018,
},
rules: {
"test-no-number-literal": "error",
"test-no-forbidden-key": "error",
"test-no-parsing-error": "error",
},
}
const noNumberLiteralRule = {
create(context) {
let count = 0
return {
JSONLiteral(node) {
if (typeof node.value === "number") {
context.report({
node,
message: `OK ${node.value}@count:${++count}`,
})
}
},
}
},
}
const noNoForbiddenKeyRule = {
create(context) {
return {
'JSONProperty > JSONLiteral[value="forbidden"]'(node) {
if (node.parent.key === node) {
context.report({
node,
message: 'no "forbidden" key',
})
}
},
}
},
}
const noParsingErrorRule = {
create(context) {
const parseError = context.parserServices.parseError
if (parseError) {
let loc = undefined
if ("column" in parseError && "lineNumber" in parseError) {
loc = {
line: parseError.lineNumber,
column: parseError.column,
}
}
return {
Program(node) {
context.report({
node,
loc,
message: parseError.message,
})
},
}
}
return {}
},
}
const noProgramExitRule = {
create(context) {
return {
"Program:exit"(node) {
context.report({
node,
message: "Program:exit",
})
},
}
},
}
const siblingSelectorRule = {
create(context) {
return {
"* ~ *"(node) {
context.report({
node,
message: "* ~ *",
})
},
}
},
}
function createLinter(target = "json") {
const linter = new Linter()
linter.defineParser(PARSER_PATH, require(PARSER_PATH))
linter.defineRule("test-no-number-literal", (context) =>
context.parserServices.defineCustomBlocksVisitor(context, jsonParser, {
target,
...noNumberLiteralRule,
})
)
linter.defineRule("test-no-forbidden-key", (context) =>
context.parserServices.defineCustomBlocksVisitor(context, jsonParser, {
target,
...noNoForbiddenKeyRule,
})
)
linter.defineRule("test-no-parsing-error", (context) =>
context.parserServices.defineCustomBlocksVisitor(context, jsonParser, {
target,
...noParsingErrorRule,
})
)
linter.defineRule("test-no-parsing-error", (context) =>
context.parserServices.defineCustomBlocksVisitor(context, jsonParser, {
target,
...noParsingErrorRule,
})
)
linter.defineRule("test-no-program-exit", (context) =>
context.parserServices.defineCustomBlocksVisitor(
context,
jsonParser,
{
target,
...noProgramExitRule,
},
noProgramExitRule.create(context)
)
)
return linter
}
//------------------------------------------------------------------------------
// Tests
//------------------------------------------------------------------------------
describe("parserServices.defineCustomBlocksVisitor tests", () => {
it("should work even if AST object was reused.", () => {
const code = `
<i18n lang="json">
{"forbidden": 42}
</i18n>`
const linter = createLinter()
const messages1 = linter.verify(code, LINTER_CONFIG)
const messages2 = linter.verify(linter.getSourceCode(), LINTER_CONFIG)
assert.strictEqual(messages1.length, 2)
assert.strictEqual(messages1[0].message, 'no "forbidden" key')
assert.strictEqual(messages1[1].message, "OK 42@count:1")
assert.strictEqual(messages1[1].line, 3)
assert.strictEqual(messages1[1].column, 15)
assert.strictEqual(messages1[1].endColumn, 17)
assert.strictEqual(messages2.length, 2)
assert.strictEqual(messages2[0].message, 'no "forbidden" key')
assert.strictEqual(messages2[1].message, "OK 42@count:1")
})
it("should work even if multiple blocks.", () => {
const code = `
<i18n lang="json">
{"foo": 42}
</i18n>
<i18n lang="json5">
{"foo": 123}
</i18n>
`
const linter = createLinter(["json", "json5"])
const messages = linter.verify(code, LINTER_CONFIG)
assert.strictEqual(messages.length, 2)
assert.strictEqual(messages[0].message, "OK 42@count:1")
assert.strictEqual(messages[0].line, 3)
assert.strictEqual(messages[0].column, 9)
assert.strictEqual(messages[0].endColumn, 11)
assert.strictEqual(messages[1].message, "OK 123@count:1")
assert.strictEqual(messages[1].line, 6)
assert.strictEqual(messages[1].column, 9)
assert.strictEqual(messages[1].endColumn, 12)
})
it("should ignore standard blocks.", () => {
const code = `
<template lang="json">
{"foo": 42}
</template>
<style lang="json">
{"foo": 123}
</style>
`
const linter = createLinter()
const messages = linter.verify(code, LINTER_CONFIG)
assert.strictEqual(messages.length, 0)
})
it("should ignore linked blocks.", () => {
const code = `
<i18n lang="json" src="./foo.json">
{"foo": 42}
</i18n>
`
const linter = createLinter()
const messages = linter.verify(code, LINTER_CONFIG)
assert.strictEqual(messages.length, 0)
})
it("should ignore un closed blocks.", () => {
const code = `
<i18n lang="json">
{"foo": 42}
`
const linter = createLinter()
const messages = linter.verify(code, LINTER_CONFIG)
assert.strictEqual(messages.length, 0)
})
it("should ignore not target blocks.", () => {
const code = `
<i18n lang="yaml">
"foo": 42
</i18n>
<i18n lang="yml">
"foo": 42
</i18n>
<docs>
"foo": 42
</docs>
`
const linter = createLinter(
(lang, block) =>
(lang === "json" && lang === "json5") ||
(!lang && block.name === "i18n")
)
const messages1 = linter.verify(code, LINTER_CONFIG)
assert.strictEqual(messages1.length, 0)
const messages2 = linter.verify(
`${code}<i18n>123</i18n>`,
LINTER_CONFIG
)
assert.strictEqual(messages2.length, 1)
})
it("should ignore html.", () => {
const code = `
<i18n lang="json">
{ "foo": 42 }
</i18n>
`
const linter = createLinter()
const messages = linter.verify(code, LINTER_CONFIG, "test.html")
assert.strictEqual(messages.length, 0)
})
it("should work even if parse error.", () => {
const code = `
<i18n lang="json">
"foo": 42
</i18n>
<i18n lang="json"></i18n>
<i18n lang="json">
</i18n>
`
const linter = createLinter()
const messages = linter.verify(code, LINTER_CONFIG)
assert.strictEqual(messages.length, 3)
assert.strictEqual(messages[0].message, "Unexpected token :")
assert.strictEqual(messages[0].line, 3)
assert.strictEqual(messages[0].column, 6)
assert.strictEqual(messages[1].message, "Unexpected end of expression.")
assert.strictEqual(messages[1].line, 5)
assert.strictEqual(messages[1].column, 19)
assert.strictEqual(
messages[2].message,
"Expected to be an expression, but got empty."
)
assert.strictEqual(messages[2].line, 6)
assert.strictEqual(messages[2].column, 19)
})
it("should work even if error.", () => {
const code = `
<i18n lang="json">
{ "foo": 42 }
</i18n>
<i18n lang="yaml">
"foo" 42
</i18n>
`
const linter = createLinter()
linter.defineRule("test-no-yml-parsing-error", (context) =>
context.parserServices.defineCustomBlocksVisitor(
context,
{
parse() {
throw new Error("Foo")
},
},
{
target: "yaml",
...noParsingErrorRule,
}
)
)
const messages = linter.verify(code, {
...LINTER_CONFIG,
rules: {
...LINTER_CONFIG.rules,
"test-no-yml-parsing-error": "error",
},
})
assert.strictEqual(messages.length, 2)
assert.strictEqual(messages[0].message, "OK 42@count:1")
assert.strictEqual(messages[0].line, 3)
assert.strictEqual(messages[0].column, 10)
assert.strictEqual(messages[0].endColumn, 12)
assert.strictEqual(messages[1].message, "Foo")
assert.strictEqual(messages[1].line, 5)
assert.strictEqual(messages[1].column, 19)
})
it("should work even with scriptVisitor.", () => {
const code = `
<i18n lang="json">
{ "foo": 42 }
</i18n>
`
const linter = createLinter()
const messages = linter.verify(code, {
...LINTER_CONFIG,
rules: {
"test-no-program-exit": "error",
...LINTER_CONFIG.rules,
},
})
assert.strictEqual(messages.length, 3)
assert.strictEqual(messages[0].message, "Program:exit")
assert.strictEqual(messages[0].line, 1)
assert.strictEqual(messages[0].column, 1)
assert.strictEqual(messages[1].message, "Program:exit")
assert.strictEqual(messages[1].line, 2)
assert.strictEqual(messages[1].column, 19)
assert.strictEqual(messages[2].message, "OK 42@count:1")
})
it("should work with parseCustomBlockElement().", () => {
const code = `
<i18n lang="json">
{ "foo": "bar" }// comment
</i18n>
`
const linter = createLinter()
linter.defineRule("test-for-parse-custom-block-element", (context) =>
context.parserServices.defineCustomBlocksVisitor(
context,
jsonParser,
{
target: "json",
create(ctx) {
return {
Program(node) {
const error =
ctx.parserServices.parseCustomBlockElement(
jsonParser,
{ jsonSyntax: "json" }
).error
ctx.report({
node,
message: JSON.stringify({
lineNumber: error.lineNumber,
column: error.column,
message: error.message,
}),
})
},
}
},
}
)
)
const messages = linter.verify(code, {
...LINTER_CONFIG,
rules: {
"test-for-parse-custom-block-element": "error",
...LINTER_CONFIG.rules,
},
})
assert.strictEqual(messages.length, 1)
assert.strictEqual(
messages[0].message,
'{"lineNumber":3,"column":16,"message":"Unexpected comment."}'
)
})
it("should work even if used sibling selector.", () => {
const code = `
<i18n lang="json">
[42, 42]
</i18n>
`
const linter = createLinter()
linter.defineRule("test-for-sibling-selector", (context) =>
context.parserServices.defineCustomBlocksVisitor(
context,
jsonParser,
{
target: "json",
create: siblingSelectorRule.create,
}
)
)
const messages = linter.verify(code, {
...LINTER_CONFIG,
rules: {
"test-for-sibling-selector": "error",
},
})
assert.strictEqual(messages.length, 1)
assert.strictEqual(messages[0].message, "* ~ *")
assert.strictEqual(messages[0].line, 3)
assert.strictEqual(messages[0].column, 6)
})
describe("API tests", () => {
it("should work getAncestors().", () => {
const code = `
<i18n lang="json">
{ "foo": { "bar": "target" } }
</i18n>
`
const linter = createLinter()
linter.defineRule("test", (context) =>
context.parserServices.defineCustomBlocksVisitor(
context,
jsonParser,
{
target: "json",
create(customBlockContext) {
return {
"JSONLiteral[value='target']"(node) {
customBlockContext.report({
node,
message: JSON.stringify(
customBlockContext
.getAncestors()
.map((n) => n.type)
),
})
},
}
},
}
)
)
const messages = linter.verify(code, {
...LINTER_CONFIG,
rules: {
...LINTER_CONFIG.rules,
test: "error",
},
})
assert.strictEqual(messages.length, 1)
assert.strictEqual(
messages[0].message,
'["Program","JSONExpressionStatement","JSONObjectExpression","JSONProperty","JSONObjectExpression","JSONProperty"]'
)
})
it("should work getSourceCode().", () => {
const code = `
<i18n lang="json">
{ "foo": { "bar": "target" } }
</i18n>
`
const linter = createLinter()
linter.defineRule("test", (context) =>
context.parserServices.defineCustomBlocksVisitor(
context,
jsonParser,
{
target: "json",
create(customBlockContext) {
return {
"JSONLiteral[value='target']"(node) {
customBlockContext.report({
node,
message: JSON.stringify(
customBlockContext
.getSourceCode()
.getLocFromIndex(node.range[0])
),
})
},
}
},
}
)
)
const messages = linter.verify(code, {
...LINTER_CONFIG,
rules: {
...LINTER_CONFIG.rules,
test: "error",
},
})
assert.strictEqual(messages.length, 1)
assert.strictEqual(messages[0].message, '{"line":3,"column":18}')
assert.strictEqual(messages[0].line, 3)
assert.strictEqual(messages[0].column, 19)
})
it("should work markVariableAsUsed().", () => {
const code = `
<js lang="js">
let a = 42;
</js>
`
const linter = createLinter()
const rule = linter.getRules().get("no-unused-vars")
linter.defineRule("test-no-unused-vars", {
...rule,
create(context) {
return context.parserServices.defineCustomBlocksVisitor(
context,
espree,
{
target: "js",
create(customBlockContext) {
return rule.create(customBlockContext)
},
}
)
},
})
linter.defineRule("test-mark-vars", {
create(context) {
return context.parserServices.defineCustomBlocksVisitor(
context,
espree,
{
target: "js",
create(customBlockContext) {
return {
Literal() {
customBlockContext.markVariableAsUsed(
"a"
)
customBlockContext.markVariableAsUsed(
"b"
)
},
}
},
}
)
},
})
const messages1 = linter.verify(code, {
...LINTER_CONFIG,
rules: {
...LINTER_CONFIG.rules,
"test-no-unused-vars": "error",
},
})
assert.strictEqual(messages1.length, 1)
assert.strictEqual(
messages1[0].message,
"'a' is assigned a value but never used."
)
const messages2 = linter.verify(code, {
...LINTER_CONFIG,
rules: {
...LINTER_CONFIG.rules,
"test-no-unused-vars": "error",
"test-mark-vars": "error",
},
})
assert.strictEqual(messages2.length, 0)
})
it("should work getDeclaredVariables().", () => {
const code = `
<js lang="js">
function a(arg) {
arg = 42
}
</js>
`
const linter = createLinter()
const rule = linter.getRules().get("no-param-reassign")
linter.defineRule("test-no-param-reassign", {
...rule,
create(context) {
return context.parserServices.defineCustomBlocksVisitor(
context,
espree,
{
target: "js",
create(customBlockContext) {
return rule.create(customBlockContext)
},
}
)
},
})
const messages1 = linter.verify(code, {
...LINTER_CONFIG,
rules: {
...LINTER_CONFIG.rules,
"test-no-param-reassign": "error",
},
})
assert.strictEqual(messages1.length, 1)
assert.strictEqual(
messages1[0].message,
"Assignment to function parameter 'arg'."
)
})
})
})