/
no-implicit-coercion.js
360 lines (352 loc) · 11.7 KB
/
no-implicit-coercion.js
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/**
* @fileoverview Tests for no-implicit-coercion rule.
* @author Toru Nagashima
*/
"use strict";
//------------------------------------------------------------------------------
// Requirements
//------------------------------------------------------------------------------
const rule = require("../../../lib/rules/no-implicit-coercion");
const { RuleTester } = require("../../../lib/rule-tester");
//------------------------------------------------------------------------------
// Tests
//------------------------------------------------------------------------------
const ruleTester = new RuleTester();
ruleTester.run("no-implicit-coercion", rule, {
valid: [
"Boolean(foo)",
"foo.indexOf(1) !== -1",
"Number(foo)",
"parseInt(foo)",
"parseFloat(foo)",
"String(foo)",
"!foo",
"~foo",
"-foo",
"+1234",
"-1234",
"+Number(lol)",
"-parseFloat(lol)",
"2 * foo",
"1 * 1234",
"1 * Number(foo)",
"1 * parseInt(foo)",
"1 * parseFloat(foo)",
"Number(foo) * 1",
"parseInt(foo) * 1",
"parseFloat(foo) * 1",
"1 * 1234 * 678 * Number(foo)",
"1 * 1234 * 678 * parseInt(foo)",
"1234 * 1 * 678 * Number(foo)",
"1234 * 1 * Number(foo) * Number(bar)",
"1234 * 1 * Number(foo) * parseInt(bar)",
"1234 * 1 * Number(foo) * parseFloat(bar)",
"1234 * 1 * parseInt(foo) * parseFloat(bar)",
"1234 * 1 * parseInt(foo) * Number(bar)",
"1234 * 1 * parseFloat(foo) * Number(bar)",
"1234 * Number(foo) * 1 * Number(bar)",
"1234 * parseInt(foo) * 1 * Number(bar)",
"1234 * parseFloat(foo) * 1 * parseInt(bar)",
"1234 * parseFloat(foo) * 1 * Number(bar)",
"1234*foo*1",
"1234*1*foo",
"1234*bar*1*foo",
"1234*1*foo*bar",
"1234*1*foo*Number(bar)",
"1234*1*Number(foo)*bar",
"1234*1*parseInt(foo)*bar",
"0 + foo",
"~foo.bar()",
"foo + 'bar'",
{ code: "foo + `${bar}`", parserOptions: { ecmaVersion: 6 } },
{ code: "!!foo", options: [{ boolean: false }] },
{ code: "~foo.indexOf(1)", options: [{ boolean: false }] },
{ code: "+foo", options: [{ number: false }] },
{ code: "1*foo", options: [{ number: false }] },
{ code: "\"\"+foo", options: [{ string: false }] },
{ code: "foo += \"\"", options: [{ string: false }] },
{ code: "var a = !!foo", options: [{ boolean: true, allow: ["!!"] }] },
{ code: "var a = ~foo.indexOf(1)", options: [{ boolean: true, allow: ["~"] }] },
{ code: "var a = ~foo", options: [{ boolean: true }] },
{ code: "var a = 1 * foo", options: [{ boolean: true, allow: ["*"] }] },
{ code: "var a = +foo", options: [{ boolean: true, allow: ["+"] }] },
{ code: "var a = \"\" + foo", options: [{ boolean: true, string: true, allow: ["+"] }] },
// https://github.com/eslint/eslint/issues/7057
"'' + 'foo'",
{ code: "`` + 'foo'", parserOptions: { ecmaVersion: 6 } },
{ code: "'' + `${foo}`", parserOptions: { ecmaVersion: 6 } },
"'foo' + ''",
{ code: "'foo' + ``", parserOptions: { ecmaVersion: 6 } },
{ code: "`${foo}` + ''", parserOptions: { ecmaVersion: 6 } },
"foo += 'bar'",
{ code: "foo += `${bar}`", parserOptions: { ecmaVersion: 6 } },
"+42"
],
invalid: [
{
code: "!!foo",
output: "Boolean(foo)",
errors: [{
messageId: "useRecommendation",
data: { recommendation: "Boolean(foo)" },
type: "UnaryExpression"
}]
},
{
code: "!!(foo + bar)",
output: "Boolean(foo + bar)",
errors: [{
messageId: "useRecommendation",
data: { recommendation: "Boolean(foo + bar)" },
type: "UnaryExpression"
}]
},
{
code: "~foo.indexOf(1)",
output: null,
errors: [{
messageId: "useRecommendation",
data: { recommendation: "foo.indexOf(1) !== -1" },
type: "UnaryExpression"
}]
},
{
code: "~foo.bar.indexOf(2)",
output: null,
errors: [{
messageId: "useRecommendation",
data: { recommendation: "foo.bar.indexOf(2) !== -1" },
type: "UnaryExpression"
}]
},
{
code: "+foo",
output: "Number(foo)",
errors: [{
messageId: "useRecommendation",
data: { recommendation: "Number(foo)" },
type: "UnaryExpression"
}]
},
{
code: "+foo.bar",
output: "Number(foo.bar)",
errors: [{
messageId: "useRecommendation",
data: { recommendation: "Number(foo.bar)" },
type: "UnaryExpression"
}]
},
{
code: "1*foo",
output: "Number(foo)",
errors: [{
messageId: "useRecommendation",
data: { recommendation: "Number(foo)" },
type: "BinaryExpression"
}]
},
{
code: "foo*1",
output: "Number(foo)",
errors: [{
messageId: "useRecommendation",
data: { recommendation: "Number(foo)" },
type: "BinaryExpression"
}]
},
{
code: "1*foo.bar",
output: "Number(foo.bar)",
errors: [{
messageId: "useRecommendation",
data: { recommendation: "Number(foo.bar)" },
type: "BinaryExpression"
}]
},
{
code: "\"\"+foo",
output: "String(foo)",
errors: [{
messageId: "useRecommendation",
data: { recommendation: "String(foo)" },
type: "BinaryExpression"
}]
},
{
code: "``+foo",
output: "String(foo)",
parserOptions: { ecmaVersion: 6 },
errors: [{
messageId: "useRecommendation",
data: { recommendation: "String(foo)" },
type: "BinaryExpression"
}]
},
{
code: "foo+\"\"",
output: "String(foo)",
errors: [{
messageId: "useRecommendation",
data: { recommendation: "String(foo)" },
type: "BinaryExpression"
}]
},
{
code: "foo+``",
output: "String(foo)",
parserOptions: { ecmaVersion: 6 },
errors: [{
messageId: "useRecommendation",
data: { recommendation: "String(foo)" },
type: "BinaryExpression"
}]
},
{
code: "\"\"+foo.bar",
output: "String(foo.bar)",
errors: [{
messageId: "useRecommendation",
data: { recommendation: "String(foo.bar)" },
type: "BinaryExpression"
}]
},
{
code: "``+foo.bar",
output: "String(foo.bar)",
parserOptions: { ecmaVersion: 6 },
errors: [{
messageId: "useRecommendation",
data: { recommendation: "String(foo.bar)" },
type: "BinaryExpression"
}]
},
{
code: "foo.bar+\"\"",
output: "String(foo.bar)",
errors: [{
messageId: "useRecommendation",
data: { recommendation: "String(foo.bar)" },
type: "BinaryExpression"
}]
},
{
code: "foo.bar+``",
output: "String(foo.bar)",
parserOptions: { ecmaVersion: 6 },
errors: [{
messageId: "useRecommendation",
data: { recommendation: "String(foo.bar)" },
type: "BinaryExpression"
}]
},
{
code: "foo += \"\"",
output: "foo = String(foo)",
errors: [{
messageId: "useRecommendation",
data: { recommendation: "foo = String(foo)" },
type: "AssignmentExpression"
}]
},
{
code: "foo += ``",
output: "foo = String(foo)",
parserOptions: { ecmaVersion: 6 },
errors: [{
messageId: "useRecommendation",
data: { recommendation: "foo = String(foo)" },
type: "AssignmentExpression"
}]
},
{
code: "var a = !!foo",
output: "var a = Boolean(foo)",
options: [{ boolean: true, allow: ["~"] }],
errors: [{
messageId: "useRecommendation",
data: { recommendation: "Boolean(foo)" },
type: "UnaryExpression"
}]
},
{
code: "var a = ~foo.indexOf(1)",
output: null,
options: [{ boolean: true, allow: ["!!"] }],
errors: [{
messageId: "useRecommendation",
data: { recommendation: "foo.indexOf(1) !== -1" },
type: "UnaryExpression"
}]
},
{
code: "var a = 1 * foo",
output: "var a = Number(foo)",
options: [{ boolean: true, allow: ["+"] }],
errors: [{
messageId: "useRecommendation",
data: { recommendation: "Number(foo)" },
type: "BinaryExpression"
}]
},
{
code: "var a = +foo",
output: "var a = Number(foo)",
options: [{ boolean: true, allow: ["*"] }],
errors: [{
messageId: "useRecommendation",
data: { recommendation: "Number(foo)" },
type: "UnaryExpression"
}]
},
{
code: "var a = \"\" + foo",
output: "var a = String(foo)",
options: [{ boolean: true, allow: ["*"] }],
errors: [{
messageId: "useRecommendation",
data: { recommendation: "String(foo)" },
type: "BinaryExpression"
}]
},
{
code: "var a = `` + foo",
output: "var a = String(foo)",
options: [{ boolean: true, allow: ["*"] }],
parserOptions: { ecmaVersion: 6 },
errors: [{
messageId: "useRecommendation",
data: { recommendation: "String(foo)" },
type: "BinaryExpression"
}]
},
{
code: "typeof+foo",
output: "typeof Number(foo)",
errors: [{
messageId: "useRecommendation",
data: { recommendation: "Number(foo)" },
type: "UnaryExpression"
}]
},
{
code: "typeof +foo",
output: "typeof Number(foo)",
errors: [{
messageId: "useRecommendation",
data: { recommendation: "Number(foo)" },
type: "UnaryExpression"
}]
},
{
code: "let x ='' + 1n;",
output: "let x =String(1n);",
parserOptions: { ecmaVersion: 2020 },
errors: [{
messageId: "useRecommendation",
data: { recommendation: "String(1n)" },
type: "BinaryExpression"
}]
}
]
});