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Add tests

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This commit is contained in:
Anders Hejlsberg 2019-10-04 16:12:44 -07:00
parent 7d32355f95
commit 42500d0606
1 changed files with 77 additions and 0 deletions
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77
tests/cases/conformance/controlFlow/controlFlowOptionalChain.ts
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@ -161,3 +161,80 @@ function f01(x: unknown) {
x;
}
}
type Thing = { foo: number, bar(): number };
function f10(o: Thing | undefined, value: number) {
if (o?.foo === value) {
o;
o.foo;
}
if (o?.["foo"] === value) {
o;
o["foo"];
}
if (o?.bar() === value) {
o;
o.bar;
}
}
function f11(o: Thing | null, value: number) {
if (o?.foo === value) {
o;
o.foo;
}
if (o?.["foo"] === value) {
o;
o["foo"];
}
if (o?.bar() === value) {
o;
o.bar;
}
}
function f12(o: Thing | undefined, value: number | undefined) {
if (o?.foo === value) {
o;
o.foo; // Error
}
if (o?.["foo"] === value) {
o;
o["foo"]; // Error
}
if (o?.bar() === value) {
o;
o.bar; // Error
}
}
function f13(o: Thing | undefined) {
if (o?.foo !== undefined) {
o;
o.foo;
}
if (o?.["foo"] !== undefined) {
o;
o["foo"];
}
if (o?.bar() !== undefined) {
o;
o.bar;
}
}
function f14(o: Thing | null) {
if (o?.foo !== undefined) {
o;
o.foo;
}
if (o?.["foo"] !== undefined) {
o;
o["foo"];
}
if (o?.bar() !== undefined) {
o;
o.bar;
}
}