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fix: allow declaration merging
fixes sveltejs/svelte#11416 Also cleans up test suite error checks
1 parent 0c11e2b commit 35e1a3b

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13 files changed

+281
-103
lines changed

13 files changed

+281
-103
lines changed

‎.changeset/proud-parks-swim.md

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,5 @@
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---
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'@sveltejs/acorn-typescript': patch
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---
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fix: allow declaration merging

‎__test__/__snapshot__/identifier/normal.ts

Lines changed: 205 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1,5 +1,5 @@
11
const NormalIdentifierSnapshot = {
2-
Issue50: {
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TypeNameSame1: {
33
type: 'Program',
44
start: 0,
55
end: 25,
@@ -146,6 +146,210 @@ const NormalIdentifierSnapshot = {
146146
],
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sourceType: 'module'
148148
},
149+
TypeNameSame2: {
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type: 'Program',
151+
start: 0,
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end: 25,
153+
loc: { start: { line: 1, column: 0, index: 0 }, end: { line: 2, column: 8, index: 25 } },
154+
body: [
155+
{
156+
type: 'TSTypeAliasDeclaration',
157+
start: 0,
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end: 16,
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loc: { start: { line: 1, column: 0, index: 0 }, end: { line: 1, column: 16, index: 16 } },
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id: {
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type: 'Identifier',
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start: 5,
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end: 8,
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loc: { start: { line: 1, column: 5, index: 5 }, end: { line: 1, column: 8, index: 8 } },
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name: 'abc'
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},
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typeAnnotation: {
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type: 'TSLiteralType',
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start: 11,
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end: 15,
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loc: {
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start: { line: 1, column: 11, index: 11 },
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end: { line: 1, column: 15, index: 15 }
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},
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literal: {
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type: 'Literal',
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start: 11,
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end: 15,
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loc: {
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start: { line: 1, column: 11, index: 11 },
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end: { line: 1, column: 15, index: 15 }
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},
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value: 1234,
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raw: '1234'
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}
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}
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},
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{
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type: 'VariableDeclaration',
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start: 17,
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end: 25,
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loc: { start: { line: 2, column: 0, index: 17 }, end: { line: 2, column: 8, index: 25 } },
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declarations: [
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{
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type: 'VariableDeclarator',
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start: 21,
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end: 24,
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loc: {
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start: { line: 2, column: 4, index: 21 },
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end: { line: 2, column: 7, index: 24 }
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},
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id: {
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type: 'Identifier',
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start: 21,
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end: 24,
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loc: {
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start: { line: 2, column: 4, index: 21 },
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end: { line: 2, column: 7, index: 24 }
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},
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name: 'abc'
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},
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init: null
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}
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],
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kind: 'let'
216+
}
217+
],
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sourceType: 'module'
219+
},
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TypeNameSame3: {
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type: 'Program',
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start: 0,
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end: 34,
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loc: { start: { line: 1, column: 0, index: 0 }, end: { line: 2, column: 17, index: 34 } },
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body: [
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{
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type: 'TSTypeAliasDeclaration',
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start: 0,
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end: 16,
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loc: { start: { line: 1, column: 0, index: 0 }, end: { line: 1, column: 16, index: 16 } },
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id: {
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type: 'Identifier',
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start: 5,
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end: 8,
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loc: { start: { line: 1, column: 5, index: 5 }, end: { line: 1, column: 8, index: 8 } },
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name: 'abc'
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},
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typeAnnotation: {
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type: 'TSLiteralType',
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start: 11,
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end: 15,
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loc: {
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start: { line: 1, column: 11, index: 11 },
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end: { line: 1, column: 15, index: 15 }
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},
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literal: {
247+
type: 'Literal',
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start: 11,
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end: 15,
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loc: {
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start: { line: 1, column: 11, index: 11 },
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end: { line: 1, column: 15, index: 15 }
253+
},
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value: 1234,
255+
raw: '1234'
256+
}
257+
}
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},
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{
260+
type: 'FunctionDeclaration',
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start: 17,
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end: 34,
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loc: { start: { line: 2, column: 0, index: 17 }, end: { line: 2, column: 17, index: 34 } },
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id: {
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type: 'Identifier',
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start: 26,
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end: 29,
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loc: {
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start: { line: 2, column: 9, index: 26 },
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end: { line: 2, column: 12, index: 29 }
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},
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name: 'abc'
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},
274+
expression: false,
275+
generator: false,
276+
async: false,
277+
params: [],
278+
body: {
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type: 'BlockStatement',
280+
start: 32,
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end: 34,
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loc: {
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start: { line: 2, column: 15, index: 32 },
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end: { line: 2, column: 17, index: 34 }
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},
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body: []
287+
}
288+
}
289+
],
290+
sourceType: 'module'
291+
},
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InterfaceMerging: {
293+
type: 'Program',
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start: 0,
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end: 33,
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loc: { start: { line: 1, column: 0, index: 0 }, end: { line: 2, column: 16, index: 33 } },
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body: [
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{
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type: 'TSInterfaceDeclaration',
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start: 0,
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end: 16,
302+
loc: { start: { line: 1, column: 0, index: 0 }, end: { line: 1, column: 16, index: 16 } },
303+
id: {
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type: 'Identifier',
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start: 10,
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end: 13,
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loc: {
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start: { line: 1, column: 10, index: 10 },
309+
end: { line: 1, column: 13, index: 13 }
310+
},
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name: 'abc'
312+
},
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body: {
314+
type: 'TSInterfaceBody',
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start: 14,
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end: 16,
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loc: {
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start: { line: 1, column: 14, index: 14 },
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end: { line: 1, column: 16, index: 16 }
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},
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body: []
322+
}
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},
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{
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type: 'TSInterfaceDeclaration',
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start: 17,
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end: 33,
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loc: { start: { line: 2, column: 0, index: 17 }, end: { line: 2, column: 16, index: 33 } },
329+
id: {
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type: 'Identifier',
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start: 27,
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end: 30,
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loc: {
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start: { line: 2, column: 10, index: 27 },
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end: { line: 2, column: 13, index: 30 }
336+
},
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name: 'abc'
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},
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body: {
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type: 'TSInterfaceBody',
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start: 31,
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end: 33,
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loc: {
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start: { line: 2, column: 14, index: 31 },
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end: { line: 2, column: 16, index: 33 }
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},
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body: []
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}
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}
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],
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sourceType: 'module'
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},
149353
ExportIdentifierAs: {
150354
type: 'Program',
151355
start: 0,

‎__test__/assert/index.test.ts

Lines changed: 3 additions & 6 deletions
Original file line numberDiff line numberDiff line change
@@ -1,4 +1,4 @@
1-
import { describe, it, expect } from 'vitest';
1+
import { describe, it } from 'vitest';
22
import { equalNode, parseSource, parseSourceShouldThrowError } from '../utils';
33
import AssertionSnapshot from '../__snapshot__/assert';
44

@@ -16,13 +16,10 @@ describe('assert', () => {
1616
});
1717

1818
it('import with duplicate', () => {
19-
const res = parseSourceShouldThrowError(
19+
parseSourceShouldThrowError(
2020
`import json from './foo.json' with { type: 'json', type: 'json' };`,
21-
'Duplicated key in attributes',
22-
'(1:63)'
21+
'Duplicated key in attributes (1:63)'
2322
);
24-
25-
expect(res).toBe(true);
2623
});
2724

2825
it('dynamic import assert', () => {

‎__test__/class/type.test.ts

Lines changed: 2 additions & 5 deletions
Original file line numberDiff line numberDiff line change
@@ -402,15 +402,12 @@ describe('class', () => {
402402
});
403403

404404
it('class abstract method with body', function () {
405-
const res = parseSourceShouldThrowError(
405+
parseSourceShouldThrowError(
406406
generateSource([`abstract class Person {`, ` abstract find(string): Person {}`, `}`]),
407407
TypeScriptError.AbstractMethodHasImplementation({
408408
methodName: 'find'
409-
}),
410-
'(2:2)'
409+
}) + ' (2:2)'
411410
);
412-
413-
expect(res).toBe(true);
414411
});
415412

416413
it('definite property', () => {

‎__test__/export/type.test.ts

Lines changed: 3 additions & 6 deletions
Original file line numberDiff line numberDiff line change
@@ -1,4 +1,4 @@
1-
import { describe, it, expect } from 'vitest';
1+
import { describe, it } from 'vitest';
22
import {
33
equalNode,
44
generateSource,
@@ -97,12 +97,9 @@ describe('export type', () => {
9797
});
9898

9999
it('export outer type type with name', () => {
100-
const res = parseSourceShouldThrowError(
100+
parseSourceShouldThrowError(
101101
generateSource([`const A = 'test'`, `export type {`, ` type A`, `}`]),
102-
TypeScriptError.TypeModifierIsUsedInTypeExports,
103-
'(3:2)'
102+
TypeScriptError.TypeModifierIsUsedInTypeExports + ' (3:2)'
104103
);
105-
106-
expect(res).toBe(true);
107104
});
108105
});

‎__test__/expression/variables.test.ts

Lines changed: 3 additions & 12 deletions
Original file line numberDiff line numberDiff line change
@@ -173,23 +173,14 @@ describe('variables declaration', () => {
173173
});
174174

175175
it('parse generics with comma', () => {
176-
const res = parseSourceShouldThrowError(
177-
generateSource([`const a: Foo<T, > = 1`]),
178-
TypeScriptError.GenericsEndWithComma,
179-
'(1:16)'
180-
);
181-
182-
expect(res).toBe(false);
176+
parseSource(generateSource([`const a: Foo<T, > = 1`]));
183177
});
184178

185179
it('parse condition express error', () => {
186-
const res = parseSourceShouldThrowError(
180+
parseSourceShouldThrowError(
187181
generateSource([`const a = true ? : 1`]),
188-
'Unexpected token',
189-
'(1:17)'
182+
'Unexpected token (1:17)'
190183
);
191-
192-
expect(res).toBe(true);
193184
});
194185

195186
it('issue 43', () => {

‎__test__/for/index.test.ts

Lines changed: 3 additions & 6 deletions
Original file line numberDiff line numberDiff line change
@@ -1,4 +1,4 @@
1-
import { describe, it, expect } from 'vitest';
1+
import { describe, it } from 'vitest';
22
import { equalNode, generateSource, parseSource, parseSourceShouldThrowError } from '../utils';
33
import ForSnapshot from '../__snapshot__/for';
44

@@ -16,12 +16,9 @@ describe('for', () => {
1616
equalNode(node, ForSnapshot.inWithoutDecl);
1717
});
1818
it('async in for of without decl', () => {
19-
const res = parseSourceShouldThrowError(
19+
parseSourceShouldThrowError(
2020
generateSource([`var async;`, `for (async of [1]) ;`]),
21-
'Unexpected token',
22-
'(2:14)'
21+
'Unexpected token (2:14)'
2322
);
24-
25-
expect(res).toBe(true);
2623
});
2724
});

‎__test__/identifier/normal.test.ts

Lines changed: 35 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -1,5 +1,5 @@
11
import { describe, it } from 'vitest';
2-
import { equalNode, generateSource, parseSource } from '../utils';
2+
import { equalNode, generateSource, parseSource, parseSourceShouldThrowError } from '../utils';
33
import NormalIdentifierSnapshot from '../__snapshot__/identifier/normal';
44

55
describe('normal identifier test', () => {
@@ -15,9 +15,41 @@ describe('normal identifier test', () => {
1515
equalNode(node, NormalIdentifierSnapshot.ImportIdentifierAs);
1616
});
1717

18-
it('issue 50', () => {
18+
it('type/value same name #1', () => {
1919
const node = parseSource(generateSource([`type abc = 1234;`, `var abc;`]));
2020

21-
equalNode(node, NormalIdentifierSnapshot.Issue50);
21+
equalNode(node, NormalIdentifierSnapshot.TypeNameSame1);
22+
});
23+
24+
it('type/identifier same name #2', () => {
25+
const node = parseSource(generateSource([`type abc = 1234;`, `let abc;`]));
26+
27+
equalNode(node, NormalIdentifierSnapshot.TypeNameSame2);
28+
});
29+
30+
it('type/identifier same name #3', () => {
31+
const node = parseSource(generateSource([`type abc = 1234;`, `function abc() {}`]));
32+
33+
equalNode(node, NormalIdentifierSnapshot.TypeNameSame3);
34+
});
35+
36+
it('interface merging', () => {
37+
const node = parseSource(generateSource([`interface abc {}`, `interface abc {}`]));
38+
39+
equalNode(node, NormalIdentifierSnapshot.InterfaceMerging);
40+
});
41+
42+
it('identifier multiple times error #1', () => {
43+
parseSourceShouldThrowError(
44+
generateSource([`let abc = 1234;`, `function abc() {}`]),
45+
"Identifier 'abc' has already been declared (2:9)"
46+
);
47+
});
48+
49+
it('identifier multiple times error #2', () => {
50+
parseSourceShouldThrowError(
51+
generateSource([`type abc = 1234;`, `type abc = 'hi';`]),
52+
"type 'abc' has already been declared. (2:5)"
53+
);
2254
});
2355
});

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