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Add tests
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12 files changed

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12 files changed

+202
-1
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‎tests/baselines/reference/arrayConcat2.js‎

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

Lines changed: 26 additions & 0 deletions
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, --, --))
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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

Lines changed: 42 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1,7 +1,7 @@
11
=== tests/cases/compiler/arrayConcat2.ts ===
22
var a: string[] = [];
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>a : string[]
4-
>[] : undefined[]
4+
>[] : never[]
55

66
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

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// #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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// #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[]
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>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/arrayFlat.js‎

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,11 @@
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//// [arrayFlat.ts]
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// #29604
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const result = [[1], ['a']].flat();
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const assert: any extends typeof result[number] ? false : true = true;
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//// [arrayFlat.js]
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// #29604
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var result = [[1], ['a']].flat();
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var assert = true;

‎tests/baselines/reference/arrayFlat.symbols‎

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,12 @@
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=== tests/cases/compiler/arrayFlat.ts ===
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// #29604
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const result = [[1], ['a']].flat();
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>result : Symbol(result, Decl(arrayFlat.ts, 2, 5))
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>[[1], ['a']].flat : Symbol(Array.flat, Decl(lib.es2019.array.d.ts, --, --), Decl(lib.es2019.array.d.ts, --, --), Decl(lib.es2019.array.d.ts, --, --), Decl(lib.es2019.array.d.ts, --, --), Decl(lib.es2019.array.d.ts, --, --) ... and 4 more)
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>flat : Symbol(Array.flat, Decl(lib.es2019.array.d.ts, --, --), Decl(lib.es2019.array.d.ts, --, --), Decl(lib.es2019.array.d.ts, --, --), Decl(lib.es2019.array.d.ts, --, --), Decl(lib.es2019.array.d.ts, --, --) ... and 4 more)
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const assert: any extends typeof result[number] ? false : true = true;
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>assert : Symbol(assert, Decl(arrayFlat.ts, 3, 5))
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>result : Symbol(result, Decl(arrayFlat.ts, 2, 5))
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‎tests/baselines/reference/arrayFlat.types‎

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@@ -0,0 +1,21 @@
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=== tests/cases/compiler/arrayFlat.ts ===
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// #29604
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const result = [[1], ['a']].flat();
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>result : (string | number)[]
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>[[1], ['a']].flat() : (string | number)[]
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>[[1], ['a']].flat : { <U extends readonly any[]>(this: U, depth: 7): Flatten<Flatten<Flatten<Flatten<Flatten<Flatten<Flatten<U[number]>>>>>>>[]; <U extends readonly any[]>(this: U, depth: 6): Flatten<Flatten<Flatten<Flatten<Flatten<Flatten<U[number]>>>>>>[]; <U extends readonly any[]>(this: U, depth: 5): Flatten<Flatten<Flatten<Flatten<Flatten<U[number]>>>>>[]; <U extends readonly any[]>(this: U, depth: 4): Flatten<Flatten<Flatten<Flatten<U[number]>>>>[]; <U extends readonly any[]>(this: U, depth: 3): Flatten<Flatten<Flatten<U[number]>>>[]; <U extends readonly any[]>(this: U, depth: 2): Flatten<Flatten<U[number]>>[]; <U extends readonly any[]>(this: U, depth?: 1): Flatten<U[number]>[]; <U extends readonly any[]>(this: U, depth: 0): U[number][]; (this: readonly any[], depth: number): any[]; }
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>[[1], ['a']] : (number[] | string[])[]
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>[1] : number[]
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>1 : 1
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>['a'] : string[]
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>'a' : "a"
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>flat : { <U extends readonly any[]>(this: U, depth: 7): Flatten<Flatten<Flatten<Flatten<Flatten<Flatten<Flatten<U[number]>>>>>>>[]; <U extends readonly any[]>(this: U, depth: 6): Flatten<Flatten<Flatten<Flatten<Flatten<Flatten<U[number]>>>>>>[]; <U extends readonly any[]>(this: U, depth: 5): Flatten<Flatten<Flatten<Flatten<Flatten<U[number]>>>>>[]; <U extends readonly any[]>(this: U, depth: 4): Flatten<Flatten<Flatten<Flatten<U[number]>>>>[]; <U extends readonly any[]>(this: U, depth: 3): Flatten<Flatten<Flatten<U[number]>>>[]; <U extends readonly any[]>(this: U, depth: 2): Flatten<Flatten<U[number]>>[]; <U extends readonly any[]>(this: U, depth?: 1): Flatten<U[number]>[]; <U extends readonly any[]>(this: U, depth: 0): U[number][]; (this: readonly any[], depth: number): any[]; }
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const assert: any extends typeof result[number] ? false : true = true;
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>assert : boolean
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>result : (string | number)[]
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>false : false
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>true : true
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>true : true
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‎tests/baselines/reference/arrayFlatMap.js‎

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Original file line numberDiff line numberDiff line change
@@ -3,10 +3,18 @@ const array: number[] = [];
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const readonlyArray: ReadonlyArray<number> = [];
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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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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

Lines changed: 14 additions & 0 deletions
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, --, --))
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// #19535
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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);
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>x : Symbol(x, Decl(arrayFlatMap.ts, 8, 7))
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>[1].flatMap : Symbol(Array.flatMap, Decl(lib.es2019.array.d.ts, --, --))
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>flatMap : Symbol(Array.flatMap, Decl(lib.es2019.array.d.ts, --, --))
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>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

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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

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// #19535
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declare function f(): number[] | number[][];
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>f : () => number[] | number[][]
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const [x] = [1].flatMap(f);
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>x : number | number[]
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>[1].flatMap(f) : (number | number[])[]
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>[1].flatMap : <U, This = undefined>(callback: (this: This, value: number, index: number, array: number[]) => U, thisArg?: This) => Flatten<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) => Flatten<U>[]
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>f : () => number[] | number[][]
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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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‎tests/cases/compiler/arrayConcat2.ts‎

Lines changed: 15 additions & 0 deletions
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
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11+
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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// @strictNullChecks: true
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[].concat([1]);

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