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[Fix] export/TypeScript: properly detect export specifiers as child…
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…ren of a TS module block

Fixes #1773
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Andreu Botella authored and ljharb committed Aug 20, 2020
1 parent 5ade156 commit fa44608
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3 changes: 3 additions & 0 deletions CHANGELOG.md
Original file line number Diff line number Diff line change
Expand Up @@ -6,6 +6,9 @@ This change log adheres to standards from [Keep a CHANGELOG](http://keepachangel

## [Unreleased]

### Fixed
- [`export`]/TypeScript: properly detect export specifiers as children of a TS module block ([#1889], thanks [@andreubotella])

## [2.22.1] - 2020-09-27
### Fixed
- [`default`]/TypeScript: avoid crash on `export =` with a MemberExpression ([#1841], thanks [@ljharb])
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6 changes: 5 additions & 1 deletion src/rules/export.js
Original file line number Diff line number Diff line change
Expand Up @@ -87,7 +87,11 @@ module.exports = {
return {
'ExportDefaultDeclaration': (node) => addNamed('default', node, getParent(node)),

'ExportSpecifier': (node) => addNamed(node.exported.name, node.exported, getParent(node)),
'ExportSpecifier': (node) => addNamed(
node.exported.name,
node.exported,
getParent(node.parent)
),

'ExportNamedDeclaration': function (node) {
if (node.declaration == null) return
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48 changes: 48 additions & 0 deletions tests/src/rules/export.js
Original file line number Diff line number Diff line change
Expand Up @@ -221,6 +221,30 @@ context('TypeScript', function () {
parser: parser,
}),
]),

// Exports in ambient modules
test(Object.assign({
code: `
declare module "a" {
const Foo = 1;
export {Foo as default};
}
declare module "b" {
const Bar = 2;
export {Bar as default};
}
`,
}, parserConfig)),
test(Object.assign({
code: `
declare module "a" {
const Foo = 1;
export {Foo as default};
}
const Bar = 2;
export {Bar as default};
`,
}, parserConfig)),
],
invalid: [
// type/value name clash
Expand Down Expand Up @@ -312,6 +336,30 @@ context('TypeScript', function () {
},
],
}, parserConfig)),

// Exports in ambient modules
test(Object.assign({
code: `
declare module "a" {
const Foo = 1;
export {Foo as default};
}
const Bar = 2;
export {Bar as default};
const Baz = 3;
export {Baz as default};
`,
errors: [
{
message: 'Multiple default exports.',
line: 7,
},
{
message: 'Multiple default exports.',
line: 9,
},
],
}, parserConfig)),
],
})
})
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