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Add tests
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+152
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8 files changed

+152
-1
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‎tests/baselines/reference/arrayConcat2.js

+22
Original file line numberDiff line numberDiff line change
@@ -6,6 +6,20 @@ a.concat('Hello');
66

77
var b = new Array<string>();
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b.concat('hello');
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// #19535
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const c: number[][] = [];
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const [x] = c.concat([1]);
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x == 1;
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// #26378
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[1].concat(['a']);
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// #26976
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[].concat([1]);
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1024

1125
//// [arrayConcat2.js]
@@ -14,3 +28,11 @@ a.concat("hello", 'world');
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a.concat('Hello');
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var b = new Array();
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b.concat('hello');
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// #19535
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var c = [];
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var x = c.concat([1])[0];
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x == 1;
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// #26378
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[1].concat(['a']);
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// #26976
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[].concat([1]);

‎tests/baselines/reference/arrayConcat2.symbols

+26
Original file line numberDiff line numberDiff line change
@@ -21,3 +21,29 @@ b.concat('hello');
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>b : Symbol(b, Decl(arrayConcat2.ts, 5, 3))
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>concat : Symbol(Array.concat, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --))
2323

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// #19535
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const c: number[][] = [];
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>c : Symbol(c, Decl(arrayConcat2.ts, 10, 5))
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const [x] = c.concat([1]);
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>x : Symbol(x, Decl(arrayConcat2.ts, 11, 7))
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>c.concat : Symbol(Array.concat, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --))
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>c : Symbol(c, Decl(arrayConcat2.ts, 10, 5))
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>concat : Symbol(Array.concat, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --))
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x == 1;
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>x : Symbol(x, Decl(arrayConcat2.ts, 11, 7))
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// #26378
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[1].concat(['a']);
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>[1].concat : Symbol(Array.concat, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --))
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>concat : Symbol(Array.concat, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --))
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// #26976
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[].concat([1]);
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>[].concat : Symbol(Array.concat, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --))
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>concat : Symbol(Array.concat, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --))
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‎tests/baselines/reference/arrayConcat2.types

+42-1
Original file line numberDiff line numberDiff line change
@@ -1,7 +1,7 @@
11
=== tests/cases/compiler/arrayConcat2.ts ===
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var a: string[] = [];
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>a : string[]
4-
>[] : undefined[]
4+
>[] : never[]
55

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a.concat("hello", 'world');
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>a.concat("hello", 'world') : string[]
@@ -30,3 +30,44 @@ b.concat('hello');
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>concat : { (...items: ConcatArray<string>[]): string[]; <U extends any[]>(...items: U): (string | ConcatFlatten<U[number]>)[]; }
3131
>'hello' : "hello"
3232

33+
// #19535
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const c: number[][] = [];
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>c : number[][]
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>[] : never[]
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const [x] = c.concat([1]);
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>x : number | number[]
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>c.concat([1]) : (number | number[])[]
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>c.concat : { (...items: ConcatArray<number[]>[]): number[][]; <U extends any[]>(...items: U): (number[] | ConcatFlatten<U[number]>)[]; }
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>c : number[][]
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>concat : { (...items: ConcatArray<number[]>[]): number[][]; <U extends any[]>(...items: U): (number[] | ConcatFlatten<U[number]>)[]; }
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>[1] : number[]
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>1 : 1
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x == 1;
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>x == 1 : boolean
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>x : number | number[]
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>1 : 1
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// #26378
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[1].concat(['a']);
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>[1].concat(['a']) : (string | number)[]
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>[1].concat : { (...items: ConcatArray<number>[]): number[]; <U extends any[]>(...items: U): (number | ConcatFlatten<U[number]>)[]; }
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>[1] : number[]
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>1 : 1
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>concat : { (...items: ConcatArray<number>[]): number[]; <U extends any[]>(...items: U): (number | ConcatFlatten<U[number]>)[]; }
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>['a'] : string[]
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>'a' : "a"
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64+
// #26976
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[].concat([1]);
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>[].concat([1]) : number[]
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>[].concat : { (...items: ConcatArray<never>[]): never[]; <U extends any[]>(...items: U): ConcatFlatten<U[number]>[]; }
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>[] : never[]
70+
>concat : { (...items: ConcatArray<never>[]): never[]; <U extends any[]>(...items: U): ConcatFlatten<U[number]>[]; }
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>[1] : number[]
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>1 : 1
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‎tests/baselines/reference/arrayFlatMap.js

+8
Original file line numberDiff line numberDiff line change
@@ -3,10 +3,18 @@ const array: number[] = [];
33
const readonlyArray: ReadonlyArray<number> = [];
44
array.flatMap((): ReadonlyArray<number> => []); // ok
55
readonlyArray.flatMap((): ReadonlyArray<number> => []); // ok
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// #19535
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declare function f(): number[] | number[][];
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const [x] = [1].flatMap(f);
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x == 1;
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713

814
//// [arrayFlatMap.js]
915
var array = [];
1016
var readonlyArray = [];
1117
array.flatMap(function () { return []; }); // ok
1218
readonlyArray.flatMap(function () { return []; }); // ok
19+
var x = [1].flatMap(f)[0];
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x == 1;

‎tests/baselines/reference/arrayFlatMap.symbols

+14
Original file line numberDiff line numberDiff line change
@@ -18,3 +18,17 @@ readonlyArray.flatMap((): ReadonlyArray<number> => []); // ok
1818
>flatMap : Symbol(ReadonlyArray.flatMap, Decl(lib.es2019.array.d.ts, --, --))
1919
>ReadonlyArray : Symbol(ReadonlyArray, Decl(lib.es5.d.ts, --, --), Decl(lib.es2015.core.d.ts, --, --), Decl(lib.es2015.iterable.d.ts, --, --), Decl(lib.es2016.array.include.d.ts, --, --), Decl(lib.es2019.array.d.ts, --, --))
2020

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// #19535
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23+
declare function f(): number[] | number[][];
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>f : Symbol(f, Decl(arrayFlatMap.ts, 3, 55))
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const [x] = [1].flatMap(f);
27+
>x : Symbol(x, Decl(arrayFlatMap.ts, 8, 7))
28+
>[1].flatMap : Symbol(Array.flatMap, Decl(lib.es2019.array.d.ts, --, --))
29+
>flatMap : Symbol(Array.flatMap, Decl(lib.es2019.array.d.ts, --, --))
30+
>f : Symbol(f, Decl(arrayFlatMap.ts, 3, 55))
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x == 1;
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>x : Symbol(x, Decl(arrayFlatMap.ts, 8, 7))
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‎tests/baselines/reference/arrayFlatMap.types

+19
Original file line numberDiff line numberDiff line change
@@ -23,3 +23,22 @@ readonlyArray.flatMap((): ReadonlyArray<number> => []); // ok
2323
>(): ReadonlyArray<number> => [] : () => readonly number[]
2424
>[] : undefined[]
2525

26+
// #19535
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28+
declare function f(): number[] | number[][];
29+
>f : () => number[] | number[][]
30+
31+
const [x] = [1].flatMap(f);
32+
>x : number | number[]
33+
>[1].flatMap(f) : (number | number[])[]
34+
>[1].flatMap : <U, This = undefined>(callback: (this: This, value: number, index: number, array: number[]) => U, thisArg?: This) => (U extends readonly (infer V)[] ? V : U)[]
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>[1] : number[]
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>1 : 1
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>flatMap : <U, This = undefined>(callback: (this: This, value: number, index: number, array: number[]) => U, thisArg?: This) => (U extends readonly (infer V)[] ? V : U)[]
38+
>f : () => number[] | number[][]
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x == 1;
41+
>x == 1 : boolean
42+
>x : number | number[]
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>1 : 1
44+

‎tests/cases/compiler/arrayConcat2.ts

+15
Original file line numberDiff line numberDiff line change
@@ -5,3 +5,18 @@ a.concat('Hello');
55

66
var b = new Array<string>();
77
b.concat('hello');
8+
9+
// #19535
10+
11+
const c: number[][] = [];
12+
const [x] = c.concat([1]);
13+
x == 1;
14+
15+
// #26378
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[1].concat(['a']);
18+
19+
// #26976
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// @strictNullChecks: true
22+
[].concat([1]);

‎tests/cases/compiler/arrayFlatMap.ts

+6
Original file line numberDiff line numberDiff line change
@@ -4,3 +4,9 @@ const array: number[] = [];
44
const readonlyArray: ReadonlyArray<number> = [];
55
array.flatMap((): ReadonlyArray<number> => []); // ok
66
readonlyArray.flatMap((): ReadonlyArray<number> => []); // ok
7+
8+
// #19535
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declare function f(): number[] | number[][];
11+
const [x] = [1].flatMap(f);
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x == 1;

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