15237418122

Committed 25 May 2025 11:31AM UTC coverage: 77.048% (-3.5%) from 80.538%

Build # 15237418122

Build Type

push

github

Committed by

web-flow

Commit Message

Rewrite: Stepper (#1742)

Run Details

3433 of 4826 branches covered (71.14%)

Branch coverage included in aggregate %.

1032 of 1260 new or added lines in 27 files covered. (81.9%)

440 existing lines in 29 files now uncovered.

10099 of 12737 relevant lines covered (79.29%)

142411.96 hits per line

Source File
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82.35

/src/parser/source/rules/noDeclareMutable.ts

import { generate } from 'astring'
import type { VariableDeclaration } from 'estree'
import type { Rule } from '../../types'
import { RuleError } from '../../errors'
import { Chapter } from '../../../types'
import { getSourceVariableDeclaration } from '../../../utils/ast/helpers'

const mutableDeclarators: VariableDeclaration['kind'][] = ['let', 'var']

export class NoDeclareMutableError extends RuleError<VariableDeclaration> {
  public explain() {
    return `Mutable variable declaration using keyword '${this.node.kind}' is not allowed.`
  }

  public elaborate() {
    const {
      id: { name },
      init
    } = getSourceVariableDeclaration(this.node)
    const value = generate(init)

    return `Use keyword "const" instead, to declare a constant:\n\n\tconst ${name} = ${value};`
  }
}

const noDeclareMutable: Rule<VariableDeclaration> = {
  name: 'no-declare-mutable',
  disableFromChapter: Chapter.SOURCE_3,

  checkers: {
    VariableDeclaration(node) {
      if (mutableDeclarators.includes(node.kind)) {
        return [new NoDeclareMutableError(node)]
      } else {
        return []
      }
    }
  }
}

export default noDeclareMutable

1	import { generate } from 'astring'	77✔
2	import type { VariableDeclaration } from 'estree'
3	import type { Rule } from '../../types'
4	import { RuleError } from '../../errors'	77✔
5	import { Chapter } from '../../../types'	77✔
6	import { getSourceVariableDeclaration } from '../../../utils/ast/helpers'	77✔
7
8	const mutableDeclarators: VariableDeclaration['kind'][] = ['let', 'var']	77✔
9
10	export class NoDeclareMutableError extends RuleError<VariableDeclaration> {	77✔
11	public explain() {
12	return `Mutable variable declaration using keyword '${this.node.kind}' is not allowed.`	11✔
13	}
14
15	public elaborate() {
16	const {
17	id: { name },
18	init
UNCOV 19	} = getSourceVariableDeclaration(this.node)	×
UNCOV 20	const value = generate(init)	×
21
UNCOV 22	return `Use keyword "const" instead, to declare a constant:\n\n\tconst ${name} = ${value};`	×
23	}
24	}
25
26	const noDeclareMutable: Rule<VariableDeclaration> = {	77✔
27	name: 'no-declare-mutable',
28	disableFromChapter: Chapter.SOURCE_3,
29
30	checkers: {
31	VariableDeclaration(node) {
32	if (mutableDeclarators.includes(node.kind)) {	5,311✔
33	return [new NoDeclareMutableError(node)]	11✔
34	} else {
35	return []	5,300✔
36	}
37	}
38	}
39	}
40
41	export default noDeclareMutable	77✔

source-academy / js-slang / 15237418122

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