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logical-assignment-operators.js
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logical-assignment-operators.js
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/**
* @fileoverview Tests for logical-assignment-operators.
* @author Daniel Martens
*/
"use strict";
//------------------------------------------------------------------------------
// Requirements
//------------------------------------------------------------------------------
const rule = require("../../../lib/rules/logical-assignment-operators"),
{ RuleTester } = require("../../../lib/rule-tester"),
parser = require("../../fixtures/fixture-parser");
//------------------------------------------------------------------------------
// Tests
//------------------------------------------------------------------------------
const ruleTester = new RuleTester({ parserOptions: { ecmaVersion: 2021 } });
ruleTester.run("logical-assignment-operators", rule, {
valid: [
// Unrelated
"a || b",
"a && b",
"a ?? b",
"a || a || b",
"var a = a || b",
"a === undefined ? a : b",
"while (a) a = b",
// Preferred
"a ||= b",
"a &&= b",
"a ??= b",
// > Operator
"a += a || b",
"a *= a || b",
"a ||= a || b",
"a &&= a || b",
// > Right
"a = a",
"a = b",
"a = a === b",
"a = a + b",
"a = a / b",
"a = fn(a) || b",
// > Reference
"a = false || c",
"a = f() || g()",
"a = b || c",
"a = b || a",
"object.a = object.b || c",
"[a] = a || b",
"({ a } = a || b)",
// Logical
"(a = b) || a",
"a + (a = b)",
"a || (b ||= c)",
"a || (b &&= c)",
"a || b === 0",
"a || fn()",
"a || (b && c)",
"a || (b ?? c)",
// > Reference
"a || (b = c)",
"a || (a ||= b)",
"fn() || (a = b)",
"a.b || (a = b)",
"a?.b || (a.b = b)",
{
code: "class Class { #prop; constructor() { this.#prop || (this.prop = value) } }",
parserOptions: { ecmaVersion: 2022 }
}, {
code: "class Class { #prop; constructor() { this.prop || (this.#prop = value) } }",
parserOptions: { ecmaVersion: 2022 }
},
// If
"if (a) a = b",
{
code: "if (a) a = b",
options: ["always", { enforceForIfStatements: false }]
}, {
code: "if (a) { a = b } else {}",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (a) { a = b } else if (a) {}",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (unrelated) {} else if (a) a = b; else {}",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (unrelated) {} else if (a) a = b; else if (unrelated) {}",
options: ["always", { enforceForIfStatements: true }]
},
// > Body
{
code: "if (a) {}",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (a) { before; a = b }",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (a) { a = b; after }",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (a) throw new Error()",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (a) a",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (a) a ||= b",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (a) b = a",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (a) { a() }",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (a) { a += a || b }",
options: ["always", { enforceForIfStatements: true }]
},
// > Test
{
code: "if (true) a = b",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (predicate(a)) a = b",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (a?.b) a.b = c",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (!a?.b) a.b = c",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (a === b) a = b",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (a === undefined) a = b",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (a === null) a = b",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (a != null) a = b",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (a === null && a === undefined) a = b",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (a === 0 || a === undefined) a = b",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (a === null || a === 1) a = b",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (a == null || a == undefined) a = b",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (a === null || a === !0) a = b",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (a === null || a === +0) a = b",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (a === null || a === null) a = b",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (a === undefined || a === void 0) a = b",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (a === null || a === void void 0) a = b",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (a === null || a === void 'string') a = b",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (a === null || a === void fn()) a = b",
options: ["always", { enforceForIfStatements: true }]
},
// > Test > Yoda
{
code: "if (a == a) a = b",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (a == b) a = b",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (null == null) a = b",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (undefined == undefined) undefined = b",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (null == x) a = b",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (null == fn()) a = b",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (null === a || a === 0) a = b",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (0 === a || null === a) a = b",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (1 === a || a === undefined) a = b",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (undefined === a || 1 === a) a = b",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (a === null || a === b) a = b",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (b === undefined || a === null) a = b",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (null === a || b === a) a = b",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (null === null || undefined === undefined) a = b",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (null === null || a === a) a = b",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (undefined === undefined || a === a) a = b",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (null === undefined || a === a) a = b",
options: ["always", { enforceForIfStatements: true }]
},
// > Test > Undefined
{
code: [
"{",
" const undefined = 0;",
" if (a == undefined) a = b",
"}"
].join("\n"),
options: ["always", { enforceForIfStatements: true }]
}, {
code: [
"(() => {",
" const undefined = 0;",
" if (condition) {",
" if (a == undefined) a = b",
" }",
"})()"
].join("\n"),
options: ["always", { enforceForIfStatements: true }]
}, {
code: [
"{",
" if (a == undefined) a = b",
"}",
"var undefined = 0;"
].join("\n"),
options: ["always", { enforceForIfStatements: true }]
}, {
code: [
"{",
" const undefined = 0;",
" if (undefined == null) undefined = b",
"}"
].join("\n"),
options: ["always", { enforceForIfStatements: true }]
}, {
code: [
"{",
" const undefined = 0;",
" if (a === undefined || a === null) a = b",
"}"
].join("\n"),
options: ["always", { enforceForIfStatements: true }]
}, {
code: [
"{",
" const undefined = 0;",
" if (undefined === a || null === a) a = b",
"}"
].join("\n"),
options: ["always", { enforceForIfStatements: true }]
},
// > Reference
{
code: "if (a) b = c",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (!a) b = c",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (!!a) b = c",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (a == null) b = c",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (a === null || a === undefined) b = c",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (a === null || b === undefined) a = b",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (a === null || b === undefined) b = c",
options: ["always", { enforceForIfStatements: true }]
}, {
code: "if (Boolean(a)) b = c",
options: ["always", { enforceForIfStatements: true }]
}, {
code: [
"function fn(Boolean) {",
" if (Boolean(a)) a = b",
"}"
].join("\n"),
options: ["always", { enforceForIfStatements: true }]
},
// Never
{
code: "a = a || b",
options: ["never"]
}, {
code: "a = a && b",
options: ["never"]
}, {
code: "a = a ?? b",
options: ["never"]
}, {
code: "a = b",
options: ["never"]
}, {
code: "a += b",
options: ["never"]
}, {
code: "a -= b",
options: ["never"]
}, {
code: "a.b = a.b || c",
options: ["never"]
},
// 3 or more operands
{
code: "a = a && b || c",
options: ["always"]
},
{
code: "a = a && b && c || d",
options: ["always"]
},
{
code: "a = (a || b) || c", // Allow if parentheses are used.
options: ["always"]
},
{
code: "a = (a && b) && c", // Allow if parentheses are used.
options: ["always"]
},
{
code: "a = (a ?? b) ?? c", // Allow if parentheses are used.
options: ["always"]
}
],
invalid: [
// Assignment
{
code: "a = a || b",
output: "a ||= b",
errors: [{ messageId: "assignment", type: "AssignmentExpression", data: { operator: "||=" }, suggestions: [] }]
}, {
code: "a = a && b",
output: "a &&= b",
errors: [{ messageId: "assignment", type: "AssignmentExpression", data: { operator: "&&=" }, suggestions: [] }]
}, {
code: "a = a ?? b",
output: "a ??= b",
errors: [{ messageId: "assignment", type: "AssignmentExpression", data: { operator: "??=" }, suggestions: [] }]
}, {
code: "foo = foo || bar",
output: "foo ||= bar",
errors: [{ messageId: "assignment", type: "AssignmentExpression", data: { operator: "||=" }, suggestions: [] }]
},
// > Right
{
code: "a = a || fn()",
output: "a ||= fn()",
errors: [{ messageId: "assignment", type: "AssignmentExpression", data: { operator: "||=" }, suggestions: [] }]
}, {
code: "a = a || b && c",
output: "a ||= b && c",
errors: [{ messageId: "assignment", type: "AssignmentExpression", data: { operator: "||=" }, suggestions: [] }]
}, {
code: "a = a || (b || c)",
output: "a ||= (b || c)",
errors: [{ messageId: "assignment", type: "AssignmentExpression", data: { operator: "||=" }, suggestions: [] }]
}, {
code: "a = a || (b ? c : d)",
output: "a ||= (b ? c : d)",
errors: [{ messageId: "assignment", type: "AssignmentExpression", data: { operator: "||=" }, suggestions: [] }]
},
// > Comments
{
code: "/* before */ a = a || b",
output: "/* before */ a ||= b",
errors: [{ messageId: "assignment", type: "AssignmentExpression", data: { operator: "||=" }, suggestions: [] }]
}, {
code: "a = a || b // after",
output: "a ||= b // after",
errors: [{ messageId: "assignment", type: "AssignmentExpression", data: { operator: "||=" }, suggestions: [] }]
}, {
code: "a /* between */ = a || b",
output: null,
errors: [{ messageId: "assignment", type: "AssignmentExpression", data: { operator: "||=" }, suggestions: [] }]
}, {
code: "a = /** @type */ a || b",
output: null,
errors: [{ messageId: "assignment", type: "AssignmentExpression", data: { operator: "||=" }, suggestions: [] }]
}, {
code: "a = a || /* between */ b",
output: null,
errors: [{ messageId: "assignment", type: "AssignmentExpression", data: { operator: "||=" }, suggestions: [] }]
},
// > Parenthesis
{
code: "(a) = a || b",
output: "(a) ||= b",
errors: [{ messageId: "assignment", type: "AssignmentExpression", data: { operator: "||=" }, suggestions: [] }]
}, {
code: "a = (a) || b",
output: "a ||= b",
errors: [{ messageId: "assignment", type: "AssignmentExpression", data: { operator: "||=" }, suggestions: [] }]
}, {
code: "a = a || (b)",
output: "a ||= (b)",
errors: [{ messageId: "assignment", type: "AssignmentExpression", data: { operator: "||=" }, suggestions: [] }]
}, {
code: "a = a || ((b))",
output: "a ||= ((b))",
errors: [{ messageId: "assignment", type: "AssignmentExpression", data: { operator: "||=" }, suggestions: [] }]
}, {
code: "(a = a || b)",
output: "(a ||= b)",
errors: [{ messageId: "assignment", type: "AssignmentExpression", data: { operator: "||=" }, suggestions: [] }]
}, {
code: "a = a || (f(), b)",
output: "a ||= (f(), b)",
errors: [{ messageId: "assignment", type: "AssignmentExpression", data: { operator: "||=" }, suggestions: [] }]
},
// > Suggestions
{
code: "a.b = a.b ?? c",
output: null,
errors: [{
messageId: "assignment",
type: "AssignmentExpression",
data: { operator: "??=" },
suggestions: [{
messageId: "useLogicalOperator",
data: { operator: "??=" },
output: "a.b ??= c"
}]
}]
}, {
code: "a.b.c = a.b.c ?? d",
output: null,
errors: [{
messageId: "assignment",
type: "AssignmentExpression",
data: { operator: "??=" },
suggestions: [{
messageId: "useLogicalOperator",
data: { operator: "??=" },
output: "a.b.c ??= d"
}]
}]
}, {
code: "a[b] = a[b] ?? c",
output: null,
errors: [{
messageId: "assignment",
type: "AssignmentExpression",
data: { operator: "??=" },
suggestions: [{
messageId: "useLogicalOperator",
data: { operator: "??=" },
output: "a[b] ??= c"
}]
}]
}, {
code: "a['b'] = a['b'] ?? c",
output: null,
errors: [{
messageId: "assignment",
type: "AssignmentExpression",
data: { operator: "??=" },
suggestions: [{
messageId: "useLogicalOperator",
data: { operator: "??=" },
output: "a['b'] ??= c"
}]
}]
}, {
code: "a.b = a['b'] ?? c",
output: null,
errors: [{
messageId: "assignment",
type: "AssignmentExpression",
data: { operator: "??=" },
suggestions: [{
messageId: "useLogicalOperator",
data: { operator: "??=" },
output: "a.b ??= c"
}]
}]
}, {
code: "a['b'] = a.b ?? c",
output: null,
errors: [{
messageId: "assignment",
type: "AssignmentExpression",
data: { operator: "??=" },
suggestions: [{
messageId: "useLogicalOperator",
data: { operator: "??=" },
output: "a['b'] ??= c"
}]
}]
}, {
code: "this.prop = this.prop ?? {}",
output: null,
errors: [{
messageId: "assignment",
type: "AssignmentExpression",
data: { operator: "??=" },
suggestions: [{
messageId: "useLogicalOperator",
data: { operator: "??=" },
output: "this.prop ??= {}"
}]
}]
},
// > With
{
code: "with (object) a = a || b",
output: null,
errors: [{
messageId: "assignment",
type: "AssignmentExpression",
data: { operator: "||=" },
suggestions: [{
messageId: "useLogicalOperator",
data: { operator: "||=" },
output: "with (object) a ||= b"
}]
}]
}, {
code: "with (object) { a = a || b }",
output: null,
errors: [{
messageId: "assignment",
type: "AssignmentExpression",
data: { operator: "||=" },
suggestions: [{
messageId: "useLogicalOperator",
data: { operator: "||=" },
output: "with (object) { a ||= b }"
}]
}]
}, {
code: "with (object) { if (condition) a = a || b }",
output: null,
errors: [{
messageId: "assignment",
type: "AssignmentExpression",
data: { operator: "||=" },
suggestions: [{
messageId: "useLogicalOperator",
data: { operator: "||=" },
output: "with (object) { if (condition) a ||= b }"
}]
}]
}, {
code: "with (a = a || b) {}",
output: "with (a ||= b) {}",
errors: [{ messageId: "assignment", type: "AssignmentExpression", data: { operator: "||=" }, suggestions: [] }]
}, {
code: "with (object) {} a = a || b",
output: "with (object) {} a ||= b",
errors: [{ messageId: "assignment", type: "AssignmentExpression", data: { operator: "||=" }, suggestions: [] }]
}, {
code: "a = a || b; with (object) {}",
output: "a ||= b; with (object) {}",
errors: [{ messageId: "assignment", type: "AssignmentExpression", data: { operator: "||=" }, suggestions: [] }]
}, {
code: "if (condition) a = a || b",
output: "if (condition) a ||= b",
errors: [{ messageId: "assignment", type: "AssignmentExpression", data: { operator: "||=" }, suggestions: [] }]
}, {
code: [
"with (object) {",
' "use strict";',
" a = a || b",
"}"
].join("\n"),
output: null,
errors: [{
messageId: "assignment",
type: "AssignmentExpression",
data: { operator: "||=" },
suggestions: [{
messageId: "useLogicalOperator",
data: { operator: "||=" },
output: [
"with (object) {",
' "use strict";',
" a ||= b",
"}"
].join("\n")
}]
}]
},
// > Context
{
code: "fn(a = a || b)",
output: "fn(a ||= b)",
errors: [{ messageId: "assignment", type: "AssignmentExpression", data: { operator: "||=" }, suggestions: [] }]
}, {
code: "fn((a = a || b))",
output: "fn((a ||= b))",
errors: [{ messageId: "assignment", type: "AssignmentExpression", data: { operator: "||=" }, suggestions: [] }]
}, {
code: "(a = a || b) ? c : d",
output: "(a ||= b) ? c : d",
errors: [{ messageId: "assignment", type: "AssignmentExpression", data: { operator: "||=" }, suggestions: [] }]
}, {
code: "a = b = b || c",
output: "a = b ||= c",
errors: [{ messageId: "assignment", type: "AssignmentExpression", data: { operator: "||=" }, suggestions: [] }]
},
// Logical
{
code: "a || (a = b)",
output: "a ||= b",
errors: [{ messageId: "logical", type: "LogicalExpression", data: { operator: "||=" } }]
}, {
code: "a && (a = b)",
output: "a &&= b",
errors: [{ messageId: "logical", type: "LogicalExpression", data: { operator: "&&=" } }]
}, {
code: "a ?? (a = b)",
output: "a ??= b",
errors: [{ messageId: "logical", type: "LogicalExpression", data: { operator: "??=" } }]
}, {
code: "foo ?? (foo = bar)",
output: "foo ??= bar",
errors: [{ messageId: "logical", type: "LogicalExpression", data: { operator: "??=" } }]
},
// > Right
{
code: "a || (a = 0)",
output: "a ||= 0",
errors: [{ messageId: "logical", type: "LogicalExpression", data: { operator: "||=" } }]
}, {
code: "a || (a = fn())",
output: "a ||= fn()",
errors: [{ messageId: "logical", type: "LogicalExpression", data: { operator: "||=" } }]
}, {
code: "a || (a = (b || c))",
output: "a ||= (b || c)",
errors: [{ messageId: "logical", type: "LogicalExpression", data: { operator: "||=" } }]
},
// > Parenthesis
{
code: "(a) || (a = b)",
output: "a ||= b",
errors: [{ messageId: "logical", type: "LogicalExpression", data: { operator: "||=" } }]
}, {
code: "a || ((a) = b)",
output: "(a) ||= b",
errors: [{ messageId: "logical", type: "LogicalExpression", data: { operator: "||=" } }]
}, {
code: "a || (a = (b))",
output: "a ||= (b)",
errors: [{ messageId: "logical", type: "LogicalExpression", data: { operator: "||=" } }]
}, {
code: "a || ((a = b))",
output: "a ||= b",
errors: [{ messageId: "logical", type: "LogicalExpression", data: { operator: "||=" } }]
}, {
code: "a || (((a = b)))",
output: "a ||= b",
errors: [{ messageId: "logical", type: "LogicalExpression", data: { operator: "||=" } }]
}, {
code: "a || ( ( a = b ) )",
output: "a ||= b",
errors: [{ messageId: "logical", type: "LogicalExpression", data: { operator: "||=" } }]
},
// > Comments
{
code: "/* before */ a || (a = b)",
output: "/* before */ a ||= b",
errors: [{ messageId: "logical", type: "LogicalExpression", data: { operator: "||=" } }]
}, {
code: "a || (a = b) // after",
output: "a ||= b // after",
errors: [{ messageId: "logical", type: "LogicalExpression", data: { operator: "||=" } }]
}, {
code: "a /* between */ || (a = b)",
output: null,
errors: [{ messageId: "logical", type: "LogicalExpression", data: { operator: "||=" } }]
}, {
code: "a || /* between */ (a = b)",
output: null,
errors: [{ messageId: "logical", type: "LogicalExpression", data: { operator: "||=" } }]
},
// > Fix Condition
{
code: "a.b || (a.b = c)",
output: "a.b ||= c",
errors: [{ messageId: "logical", type: "LogicalExpression", data: { operator: "||=" } }]
}, {
code: "class Class { #prop; constructor() { this.#prop || (this.#prop = value) } }",
output: "class Class { #prop; constructor() { this.#prop ||= value } }",
parserOptions: { ecmaVersion: 2022 },
errors: [{ messageId: "logical", type: "LogicalExpression", data: { operator: "||=" } }]
}, {
code: "a['b'] || (a['b'] = c)",
output: "a['b'] ||= c",
errors: [{ messageId: "logical", type: "LogicalExpression", data: { operator: "||=" } }]
}, {
code: "a[0] || (a[0] = b)",
output: "a[0] ||= b",
errors: [{ messageId: "logical", type: "LogicalExpression", data: { operator: "||=" } }]
}, {
code: "a[this] || (a[this] = b)",
output: "a[this] ||= b",
errors: [{ messageId: "logical", type: "LogicalExpression", data: { operator: "||=" } }]
}, {
code: "foo.bar || (foo.bar = baz)",
output: "foo.bar ||= baz",
errors: [{ messageId: "logical", type: "LogicalExpression", data: { operator: "||=" } }]
}, {
code: "a.b.c || (a.b.c = d)",
output: null,
errors: [{
messageId: "logical",
type: "LogicalExpression",
data: { operator: "||=" },
suggestions: [{
messageId: "convertLogical",
data: { operator: "||=" },
output: "a.b.c ||= d"
}]
}]
}, {
code: "a[b.c] || (a[b.c] = d)",
output: null,
errors: [{
messageId: "logical",
type: "LogicalExpression",
data: { operator: "||=" },
suggestions: [{
messageId: "convertLogical",
data: { operator: "||=" },
output: "a[b.c] ||= d"
}]
}]
}, {
code: "a[b?.c] || (a[b?.c] = d)",
output: null,
errors: [{
messageId: "logical",
type: "LogicalExpression",
data: { operator: "||=" },
suggestions: [{
messageId: "convertLogical",
data: { operator: "||=" },
output: "a[b?.c] ||= d"
}]
}]
}, {
code: "with (object) a.b || (a.b = c)",
output: null,
errors: [{
messageId: "logical",
type: "LogicalExpression",
data: { operator: "||=" },
suggestions: [{
messageId: "convertLogical",
data: { operator: "||=" },
output: "with (object) a.b ||= c"
}]
}]
},
// > Context
{
code: "a = a.b || (a.b = {})",
output: "a = a.b ||= {}",
errors: [{ messageId: "logical", type: "LogicalExpression", data: { operator: "||=" }, suggestions: [] }]
},
{
code: "a || (a = 0) || b",
output: "(a ||= 0) || b",
errors: [{ messageId: "logical", type: "LogicalExpression", data: { operator: "||=" } }]
}, {
code: "(a || (a = 0)) || b",
output: "(a ||= 0) || b",
errors: [{ messageId: "logical", type: "LogicalExpression", data: { operator: "||=" } }]
}, {
code: "a || (b || (b = 0))",
output: "a || (b ||= 0)",
errors: [{ messageId: "logical", type: "LogicalExpression", data: { operator: "||=" } }]
}, {
code: "a = b || (b = c)",
output: "a = b ||= c",
errors: [{ messageId: "logical", type: "LogicalExpression", data: { operator: "||=" } }]
}, {
code: "a || (a = 0) ? b : c",
output: "(a ||= 0) ? b : c",
errors: [{ messageId: "logical", type: "LogicalExpression", data: { operator: "||=" } }]
}, {
code: "fn(a || (a = 0))",
output: "fn(a ||= 0)",
errors: [{ messageId: "logical", type: "LogicalExpression", data: { operator: "||=" } }]
},
// If
{
code: "if (a) a = b",
output: "a &&= b",
options: ["always", { enforceForIfStatements: true }],
errors: [{ messageId: "if", type: "IfStatement", data: { operator: "&&=" } }]
}, {
code: "if (Boolean(a)) a = b",
output: "a &&= b",
options: ["always", { enforceForIfStatements: true }],
errors: [{ messageId: "if", type: "IfStatement", data: { operator: "&&=" } }]
}, {
code: "if (!!a) a = b",
output: "a &&= b",
options: ["always", { enforceForIfStatements: true }],
errors: [{ messageId: "if", type: "IfStatement", data: { operator: "&&=" } }]
}, {
code: "if (!a) a = b",
output: "a ||= b",
options: ["always", { enforceForIfStatements: true }],
errors: [{ messageId: "if", type: "IfStatement", data: { operator: "||=" } }]
}, {
code: "if (!Boolean(a)) a = b",
output: "a ||= b",
options: ["always", { enforceForIfStatements: true }],
errors: [{ messageId: "if", type: "IfStatement", data: { operator: "||=" } }]
}, {
code: "if (a == undefined) a = b",
output: "a ??= b",
options: ["always", { enforceForIfStatements: true }],
errors: [{ messageId: "if", type: "IfStatement", data: { operator: "??=" } }]
}, {
code: "if (a == null) a = b",
output: "a ??= b",
options: ["always", { enforceForIfStatements: true }],
errors: [{ messageId: "if", type: "IfStatement", data: { operator: "??=" } }]
}, {
code: "if (a === null || a === undefined) a = b",
output: "a ??= b",
options: ["always", { enforceForIfStatements: true }],
errors: [{ messageId: "if", type: "IfStatement", data: { operator: "??=" } }]
}, {
code: "if (a === undefined || a === null) a = b",
output: "a ??= b",
options: ["always", { enforceForIfStatements: true }],
errors: [{ messageId: "if", type: "IfStatement", data: { operator: "??=" } }]
}, {
code: "if (a === null || a === void 0) a = b",
output: "a ??= b",
options: ["always", { enforceForIfStatements: true }],
errors: [{ messageId: "if", type: "IfStatement", data: { operator: "??=" } }]
}, {
code: "if (a === void 0 || a === null) a = b",
output: "a ??= b",
options: ["always", { enforceForIfStatements: true }],
errors: [{ messageId: "if", type: "IfStatement", data: { operator: "??=" } }]
}, {
code: "if (a) { a = b; }",
output: "a &&= b;",
options: ["always", { enforceForIfStatements: true }],
errors: [{ messageId: "if", type: "IfStatement", data: { operator: "&&=" } }]
}, {
code: [
"{ const undefined = 0; }",
"if (a == undefined) a = b"
].join("\n"),
output: [
"{ const undefined = 0; }",
"a ??= b"
].join("\n"),
options: ["always", { enforceForIfStatements: true }],
errors: [{ messageId: "if", type: "IfStatement", data: { operator: "??=" } }]
}, {
code: [
"if (a == undefined) a = b",
"{ const undefined = 0; }"
].join("\n"),
output: [
"a ??= b",
"{ const undefined = 0; }"
].join("\n"),
options: ["always", { enforceForIfStatements: true }],
errors: [{ messageId: "if", type: "IfStatement", data: { operator: "??=" } }]
},
// > Yoda
{
code: "if (null == a) a = b",
output: "a ??= b",
options: ["always", { enforceForIfStatements: true }],
errors: [{ messageId: "if", type: "IfStatement", data: { operator: "??=" }, suggestions: [] }]
}, {
code: "if (undefined == a) a = b",
output: "a ??= b",
options: ["always", { enforceForIfStatements: true }],
errors: [{ messageId: "if", type: "IfStatement", data: { operator: "??=" }, suggestions: [] }]
}, {
code: "if (undefined === a || a === null) a = b",
output: "a ??= b",
options: ["always", { enforceForIfStatements: true }],
errors: [{ messageId: "if", type: "IfStatement", data: { operator: "??=" }, suggestions: [] }]
}, {
code: "if (a === undefined || null === a) a = b",
output: "a ??= b",
options: ["always", { enforceForIfStatements: true }],
errors: [{ messageId: "if", type: "IfStatement", data: { operator: "??=" }, suggestions: [] }]
}, {
code: "if (undefined === a || null === a) a = b",
output: "a ??= b",
options: ["always", { enforceForIfStatements: true }],
errors: [{ messageId: "if", type: "IfStatement", data: { operator: "??=" }, suggestions: [] }]
}, {
code: "if (null === a || a === undefined) a = b",
output: "a ??= b",
options: ["always", { enforceForIfStatements: true }],
errors: [{ messageId: "if", type: "IfStatement", data: { operator: "??=" }, suggestions: [] }]
}, {
code: "if (a === null || undefined === a) a = b",
output: "a ??= b",
options: ["always", { enforceForIfStatements: true }],
errors: [{ messageId: "if", type: "IfStatement", data: { operator: "??=" }, suggestions: [] }]
}, {
code: "if (null === a || undefined === a) a = b",
output: "a ??= b",
options: ["always", { enforceForIfStatements: true }],
errors: [{ messageId: "if", type: "IfStatement", data: { operator: "??=" }, suggestions: [] }]
},
// > Parenthesis
{
code: "if ((a)) a = b",
output: "a &&= b",
options: ["always", { enforceForIfStatements: true }],
errors: [{ messageId: "if", type: "IfStatement", data: { operator: "&&=" } }]
}, {
code: "if (a) (a) = b",
output: "(a) &&= b",
options: ["always", { enforceForIfStatements: true }],
errors: [{ messageId: "if", type: "IfStatement", data: { operator: "&&=" } }]
}, {
code: "if (a) a = (b)",
output: "a &&= (b)",
options: ["always", { enforceForIfStatements: true }],