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Add test cases for typeof x == s and typeof x != s form of typeguard which has no effect on narrowing type

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Sheetal Nandi
2014-11-12 12:49:29 -08:00
parent 45ca9d285f
commit 152c77cd2a
6 changed files with 372 additions and 0 deletions
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35
tests/cases/conformance/expressions/typeGuards/typeGuardOfFormTypeOfEqualEqualHasNoEffect.ts Normal file
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@@ -0,0 +1,35 @@
class C { private p: string };
var strOrNum: string | number;
var strOrBool: string | boolean;
var numOrBool: number | boolean
var strOrC: string | C;
// typeof x == s has not effect on typeguard
if (typeof strOrNum == "string") {
var r1 = strOrNum; // string | number
}
else {
var r1 = strOrNum; // string | number
}
if (typeof strOrBool == "boolean") {
var r2 = strOrBool; // string | boolean
}
else {
var r2 = strOrBool; // string | boolean
}
if (typeof numOrBool == "number") {
var r3 = numOrBool; // number | boolean
}
else {
var r3 = numOrBool; // number | boolean
}
if (typeof strOrC == "Object") {
var r4 = strOrC; // string | C
}
else {
var r4 = strOrC; // string | C
}

35
tests/cases/conformance/expressions/typeGuards/typeGuardOfFormTypeOfNotEqualHasNoEffect.ts Normal file
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@@ -0,0 +1,35 @@
class C { private p: string };
var strOrNum: string | number;
var strOrBool: string | boolean;
var numOrBool: number | boolean
var strOrC: string | C;
// typeof x != s has not effect on typeguard
if (typeof strOrNum != "string") {
var r1 = strOrNum; // string | number
}
else {
var r1 = strOrNum; // string | number
}
if (typeof strOrBool != "boolean") {
var r2 = strOrBool; // string | boolean
}
else {
var r2 = strOrBool; // string | boolean
}
if (typeof numOrBool != "number") {
var r3 = numOrBool; // number | boolean
}
else {
var r3 = numOrBool; // number | boolean
}
if (typeof strOrC != "Object") {
var r4 = strOrC; // string | C
}
else {
var r4 = strOrC; // string | C
}