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feat(eslint-plugin): [type-annotation-spacing] handle space between ? and : #3138

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merged 4 commits into from Mar 28, 2021
Merged

feat(eslint-plugin): [type-annotation-spacing] handle space between ? and : #3138

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377ad4c
fix(eslint-plugin): [type-annotation-spacing] handle space after ?
Knutas Mar 3, 2021
e3a545d
fix: skip before flag and add test for interface
Knutas Mar 3, 2021
4c4d93b
fix: add new message
Knutas Mar 22, 2021
ae1372e
fix: use isSpaceBetweenTokens to support older ESLint
Knutas Mar 22, 2021
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19 changes: 19 additions & 0 deletions packages/eslint-plugin/src/rules/type-annotation-spacing.ts
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Expand Up @@ -177,6 +177,25 @@ export default util.createRule<Options, MessageIds>({
const { before, after } = getRules(ruleSet, typeAnnotation);

if (type === ':' && previousToken.value === '?') {
if (
!before &&
sourceCode.isSpaceBetween!(previousToken, punctuatorTokenStart)
) {
context.report({
node: punctuatorTokenStart,
messageId: 'unexpectedSpaceBefore',
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I think we could add a custom message here for additional clarity.
Something like Unexpected space between the {{previousToken}} and the {{type}}.

data: {
type,
},
fix(fixer) {
return fixer.removeRange([
previousToken.range[1],
punctuatorTokenStart.range[0],
]);
},
});
}

// shift the start to the ?
type = '?:';
punctuatorTokenStart = previousToken;
Expand Down
78 changes: 78 additions & 0 deletions packages/eslint-plugin/tests/rules/type-annotation-spacing.test.ts
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Expand Up @@ -314,6 +314,10 @@ type Foo = {
code: 'function foo(a : string) {}',
options: [{ after: true, before: true }],
},
{
code: 'function foo(a ? : string) {}',
options: [{ after: true, before: true }],
},
{
code: `
class Foo {
Expand Down Expand Up @@ -4593,6 +4597,54 @@ type Bar = Record<keyof Foo, string>
},
],
},
{
code: 'function foo(a? : string) {}',
output: 'function foo(a?: string) {}',
errors: [
{
messageId: 'unexpectedSpaceBefore',
data: { type: ':' },
line: 1,
column: 17,
},
],
},
{
code: 'function foo(a ? : string) {}',
output: 'function foo(a?: string) {}',
errors: [
{
messageId: 'unexpectedSpaceBefore',
data: { type: '?:' },
line: 1,
column: 16,
},
{
messageId: 'unexpectedSpaceBefore',
data: { type: ':' },
line: 1,
column: 18,
},
],
},
{
code: 'function foo(a ? : string) {}',
output: 'function foo(a?: string) {}',
errors: [
{
messageId: 'unexpectedSpaceBefore',
data: { type: '?:' },
line: 1,
column: 16,
},
{
messageId: 'unexpectedSpaceBefore',
data: { type: ':' },
line: 1,
column: 19,
},
],
},
{
code: `
class Foo {
Expand Down Expand Up @@ -4635,6 +4687,32 @@ class Foo {
},
{
code: `
class Foo {
constructor(message ? : string);
}
`,
output: `
class Foo {
constructor(message?: string);
}
`,
errors: [
{
messageId: 'unexpectedSpaceBefore',
data: { type: '?:' },
line: 3,
column: 25,
},
{
messageId: 'unexpectedSpaceBefore',
data: { type: ':' },
line: 3,
column: 27,
},
],
},
{
code: `
class Foo {
greet(name ?: string) : string { return name; }
}
Expand Down