fix(lint): ignore indentation multiple when set to zero

src/rules/indentationMultiple.spec.ts

@@ -14,6 +14,12 @@ describe('indentationMultiple', () => {
     expect(indentationMultiple.test(line, 1, config)).toEqual([])
   })
 
+  it('should ignore indentation when the multiple is set to 0', () => {
+    const line = " %put 'hello';"
+    const config = new LintConfig({ indentationMultiple: 0 })
+    expect(indentationMultiple.test(line, 1, config)).toEqual([])
+  })
+
   it('should return an empty array when the line is not indented', () => {
     const line = "%put 'hello';"
     const config = new LintConfig({ indentationMultiple: 2 })

src/rules/indentationMultiple.ts

@@ -9,9 +9,13 @@ const message = 'Line has incorrect indentation'
 const test = (value: string, lineNumber: number, config?: LintConfig) => {
   if (!value.startsWith(' ')) return []
 
-  const indentationMultiple = config?.indentationMultiple || 2
+  const indentationMultiple = isNaN(config?.indentationMultiple as number)
+    ? 2
+    : config?.indentationMultiple
+
+  if (indentationMultiple === 0) return []
   const numberOfSpaces = value.search(/\S|$/)
-  if (numberOfSpaces % indentationMultiple === 0) return []
+  if (numberOfSpaces % indentationMultiple! === 0) return []
   return [
     {
       message: `${message} - ${numberOfSpaces} ${

src/types/LintConfig.spec.ts

@@ -40,6 +40,20 @@ describe('LintConfig', () => {
     expect(config.fileLintRules[0].type).toEqual(LintRuleType.File)
   })
 
+  it('should create an instance with the indentation multiple set', () => {
+    const config = new LintConfig({ indentationMultiple: 5 })
+
+    expect(config).toBeTruthy()
+    expect(config.indentationMultiple).toEqual(5)
+  })
+
+  it('should create an instance with the indentation multiple turned off', () => {
+    const config = new LintConfig({ indentationMultiple: 0 })
+
+    expect(config).toBeTruthy()
+    expect(config.indentationMultiple).toEqual(0)
+  })
+
   it('should create an instance with all flags set', () => {
     const config = new LintConfig({
       noTrailingSpaces: true,

src/types/LintConfig.ts

@@ -19,8 +19,8 @@ export class LintConfig {
   readonly lineLintRules: LineLintRule[] = []
   readonly fileLintRules: FileLintRule[] = []
   readonly pathLintRules: PathLintRule[] = []
-  readonly maxLineLength = 80
-  readonly indentationMultiple = 2
+  readonly maxLineLength: number = 80
+  readonly indentationMultiple: number = 2
 
   constructor(json?: any) {
     if (json?.noTrailingSpaces) {
@@ -40,8 +40,8 @@ export class LintConfig {
       this.lineLintRules.push(maxLineLength)
     }
 
-    if (json?.indentationMultiple) {
-      this.indentationMultiple = json.indentationMultiple
+    if (!isNaN(json?.indentationMultiple)) {
+      this.indentationMultiple = json.indentationMultiple as number
       this.lineLintRules.push(indentationMultiple)
     }