a772c26a71
* add tests but not baselines or fixes * Update original change Still probably wrong; probably doesn't even compile beacuse I'm just typing on my laptop. * fix error code ok * notes to self * Error: property is specified more than once via spread * make jsx tests stricter * update semicolon error message * use ?. because it is great * use maybeTypeOfKind in new code * restore jsx error * add tests
77 lines
2.6 KiB
TypeScript
77 lines
2.6 KiB
TypeScript
// @target: es5
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// @strictNullChecks: true
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let o = { a: 1, b: 'no' }
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/// private propagates
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class PrivateOptionalX {
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private x?: number;
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}
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class PublicX {
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public x: number;
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}
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declare let publicX: PublicX;
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declare let privateOptionalX: PrivateOptionalX;
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let o2 = { ...publicX, ...privateOptionalX };
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let sn: number = o2.x; // error, x is private
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declare let optionalString: { sn?: string };
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declare let optionalNumber: { sn?: number };
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let allOptional: { sn: string | number } = { ...optionalString, ...optionalNumber };
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// error, 'sn' is optional in source, required in target
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// assignability as target
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interface Bool { b: boolean };
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interface Str { s: string };
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let spread = { ...{ b: true }, ...{s: "foo" } };
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spread = { s: "foo" }; // error, missing 'b'
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let b = { b: false };
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spread = b; // error, missing 's'
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// literal repeats are not allowed, but spread repeats are fine
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let duplicated = { b: 'bad', ...o, b: 'bad', ...o2, b: 'bad' }
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let duplicatedSpread = { ...o, ...o }
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// Note: ignore changes the order that properties are printed
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let ignore: { a: number, b: string } =
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{ b: 'ignored', ...o }
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let o3 = { a: 1, b: 'no' }
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let o4 = { b: 'yes', c: true }
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let combinedBefore: { a: number, b: string, c: boolean } =
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{ b: 'ok', ...o3, ...o4 }
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let combinedMid: { a: number, b: string, c: boolean } =
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{ ...o3, b: 'ok', ...o4 }
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let combinedNested: { a: number, b: boolean, c: string, d: string } =
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{ ...{ a: 4, ...{ b: false, c: 'overriden' } }, d: 'actually new', ...{ a: 5, d: 'maybe new' } }
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let changeTypeBefore: { a: number, b: string } =
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{ a: 'wrong type?', ...o3 };
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let computedMiddle: { a: number, b: string, c: boolean, "in the middle": number } =
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{ ...o3, ['in the middle']: 13, b: 'maybe?', ...o4 }
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// primitives are not allowed, except for falsy ones
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let spreadNum = { ...12 };
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let spreadSum = { ...1 + 1 };
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let spreadZero = { ...0 };
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spreadZero.toFixed(); // error, no methods even from a falsy number
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let spreadBool = { ...true };
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spreadBool.valueOf();
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let spreadStr = { ...'foo' };
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spreadStr.length; // error, no 'length'
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spreadStr.charAt(1); // error, no methods either
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// functions are skipped
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let spreadFunc = { ...function () { } }
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spreadFunc(); // error, no call signature
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// write-only properties get skipped
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let setterOnly = { ...{ set b (bad: number) { } } };
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setterOnly.b = 12; // error, 'b' does not exist
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// methods are skipped because they aren't enumerable
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class C { p = 1; m() { } }
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let c: C = new C()
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let spreadC = { ...c }
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spreadC.m(); // error 'm' is not in '{ ... c }'
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// non primitive
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let obj: object = { a: 123 };
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let spreadObj = { ...obj };
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spreadObj.a; // error 'a' is not in {}
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