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Add a regression test related to narrowing in plain JS files #59611

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Merged
merged 1 commit into from
Aug 13, 2024
Merged

Add a regression test related to narrowing in plain JS files #59611

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21 changes: 21 additions & 0 deletions tests/baselines/reference/narrowingPlainJsNoCrash1.js
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@@ -0,0 +1,21 @@
//// [tests/cases/compiler/narrowingPlainJsNoCrash1.ts] ////

//// [index.js]
// https://github.com/microsoft/TypeScript/issues/59594

var a$b = {};
var c, d;
d = a$b;
while (d !== a$b);
while ((c = a$b != a$b)) c.e;


//// [index.js]
// https://github.com/microsoft/TypeScript/issues/59594
var a$b = {};
var c, d;
d = a$b;
while (d !== a$b)
;
while ((c = a$b != a$b))
c.e;
26 changes: 26 additions & 0 deletions tests/baselines/reference/narrowingPlainJsNoCrash1.symbols
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@@ -0,0 +1,26 @@
//// [tests/cases/compiler/narrowingPlainJsNoCrash1.ts] ////

=== index.js ===
// https://github.com/microsoft/TypeScript/issues/59594

var a$b = {};
>a$b : Symbol(a$b, Decl(index.js, 2, 3))

var c, d;
>c : Symbol(c, Decl(index.js, 3, 3))
>d : Symbol(d, Decl(index.js, 3, 6))

d = a$b;
>d : Symbol(d, Decl(index.js, 3, 6))
>a$b : Symbol(a$b, Decl(index.js, 2, 3))

while (d !== a$b);
>d : Symbol(d, Decl(index.js, 3, 6))
>a$b : Symbol(a$b, Decl(index.js, 2, 3))

while ((c = a$b != a$b)) c.e;
>c : Symbol(c, Decl(index.js, 3, 3))
>a$b : Symbol(a$b, Decl(index.js, 2, 3))
>a$b : Symbol(a$b, Decl(index.js, 2, 3))
>c : Symbol(c, Decl(index.js, 3, 3))

48 changes: 48 additions & 0 deletions tests/baselines/reference/narrowingPlainJsNoCrash1.types
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//// [tests/cases/compiler/narrowingPlainJsNoCrash1.ts] ////

=== index.js ===
// https://github.com/microsoft/TypeScript/issues/59594

var a$b = {};
>a$b : {}
> : ^^
>{} : {}
> : ^^

var c, d;
>c : any
>d : any

d = a$b;
>d = a$b : {}
> : ^^
>d : any
>a$b : {}
> : ^^

while (d !== a$b);
>d !== a$b : boolean
> : ^^^^^^^
>d : {}
> : ^^
>a$b : {}
> : ^^

while ((c = a$b != a$b)) c.e;
>(c = a$b != a$b) : boolean
> : ^^^^^^^
>c = a$b != a$b : boolean
> : ^^^^^^^
>c : any
>a$b != a$b : boolean
> : ^^^^^^^
>a$b : {}
> : ^^
>a$b : {}
> : ^^
>c.e : error
>c : true
> : ^^^^
>e : any
> : ^^^

13 changes: 13 additions & 0 deletions tests/cases/compiler/narrowingPlainJsNoCrash1.ts
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@@ -0,0 +1,13 @@
// @allowJs: true
// @checkJs: false
// @outDir: true

// @filename: index.js

// https://github.com/microsoft/TypeScript/issues/59594

var a$b = {};
var c, d;
d = a$b;
while (d !== a$b);
while ((c = a$b != a$b)) c.e;