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ahejlsbergahejlsberg
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Add tests
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4 files changed

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lines changed

4 files changed

+463
-1
lines changed

‎tests/baselines/reference/discriminantPropertyCheck.js

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@@ -174,6 +174,67 @@ function func3(value: Partial<UnionOfBar>) {
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}
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}
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}
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// Repro from #30557
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interface TypeA {
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Name: "TypeA";
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Value1: "Cool stuff!";
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}
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interface TypeB {
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Name: "TypeB";
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Value2: 0;
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}
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type Type = TypeA | TypeB;
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declare function isType(x: unknown): x is Type;
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function WorksProperly(data: Type) {
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if (data.Name === "TypeA") {
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const value1 = data.Value1;
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}
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}
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function DoesNotWork(data: unknown) {
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if (isType(data)) {
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if (data.Name === "TypeA") {
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const value1 = data.Value1;
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}
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}
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}
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// Repro from #36777
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type TestA = {
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type: 'testA';
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bananas: 3;
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}
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type TestB = {
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type: 'testB';
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apples: 5;
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}
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type AllTests = TestA | TestB;
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type MapOfAllTests = Record<string, AllTests>;
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const doTestingStuff = (mapOfTests: MapOfAllTests, ids: string[]) => {
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ids.forEach(id => {
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let test;
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test = mapOfTests[id];
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if (test.type === 'testA') {
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console.log(test.bananas);
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}
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switch (test.type) {
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case 'testA': {
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console.log(test.bananas);
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}
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}
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});
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};
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//// [discriminantPropertyCheck.js]
@@ -269,3 +330,29 @@ function func3(value) {
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}
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}
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}
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function WorksProperly(data) {
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if (data.Name === "TypeA") {
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var value1 = data.Value1;
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}
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}
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function DoesNotWork(data) {
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if (isType(data)) {
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if (data.Name === "TypeA") {
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var value1 = data.Value1;
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}
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}
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}
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var doTestingStuff = function (mapOfTests, ids) {
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ids.forEach(function (id) {
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var test;
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test = mapOfTests[id];
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if (test.type === 'testA') {
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console.log(test.bananas);
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}
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switch (test.type) {
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case 'testA': {
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console.log(test.bananas);
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}
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}
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});
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};

‎tests/baselines/reference/discriminantPropertyCheck.symbols

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Original file line numberDiff line numberDiff line change
@@ -508,3 +508,159 @@ function func3(value: Partial<UnionOfBar>) {
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}
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}
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// Repro from #30557
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interface TypeA {
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>TypeA : Symbol(TypeA, Decl(discriminantPropertyCheck.ts, 174, 1))
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Name: "TypeA";
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>Name : Symbol(TypeA.Name, Decl(discriminantPropertyCheck.ts, 178, 17))
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Value1: "Cool stuff!";
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>Value1 : Symbol(TypeA.Value1, Decl(discriminantPropertyCheck.ts, 179, 18))
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}
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interface TypeB {
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>TypeB : Symbol(TypeB, Decl(discriminantPropertyCheck.ts, 181, 1))
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Name: "TypeB";
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>Name : Symbol(TypeB.Name, Decl(discriminantPropertyCheck.ts, 183, 17))
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Value2: 0;
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>Value2 : Symbol(TypeB.Value2, Decl(discriminantPropertyCheck.ts, 184, 18))
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}
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type Type = TypeA | TypeB;
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>Type : Symbol(Type, Decl(discriminantPropertyCheck.ts, 186, 1))
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>TypeA : Symbol(TypeA, Decl(discriminantPropertyCheck.ts, 174, 1))
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>TypeB : Symbol(TypeB, Decl(discriminantPropertyCheck.ts, 181, 1))
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declare function isType(x: unknown): x is Type;
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>isType : Symbol(isType, Decl(discriminantPropertyCheck.ts, 188, 26))
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>x : Symbol(x, Decl(discriminantPropertyCheck.ts, 190, 24))
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>x : Symbol(x, Decl(discriminantPropertyCheck.ts, 190, 24))
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>Type : Symbol(Type, Decl(discriminantPropertyCheck.ts, 186, 1))
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function WorksProperly(data: Type) {
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>WorksProperly : Symbol(WorksProperly, Decl(discriminantPropertyCheck.ts, 190, 47))
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>data : Symbol(data, Decl(discriminantPropertyCheck.ts, 192, 23))
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>Type : Symbol(Type, Decl(discriminantPropertyCheck.ts, 186, 1))
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if (data.Name === "TypeA") {
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>data.Name : Symbol(Name, Decl(discriminantPropertyCheck.ts, 178, 17), Decl(discriminantPropertyCheck.ts, 183, 17))
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>data : Symbol(data, Decl(discriminantPropertyCheck.ts, 192, 23))
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>Name : Symbol(Name, Decl(discriminantPropertyCheck.ts, 178, 17), Decl(discriminantPropertyCheck.ts, 183, 17))
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const value1 = data.Value1;
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>value1 : Symbol(value1, Decl(discriminantPropertyCheck.ts, 194, 13))
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>data.Value1 : Symbol(TypeA.Value1, Decl(discriminantPropertyCheck.ts, 179, 18))
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>data : Symbol(data, Decl(discriminantPropertyCheck.ts, 192, 23))
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>Value1 : Symbol(TypeA.Value1, Decl(discriminantPropertyCheck.ts, 179, 18))
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}
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}
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function DoesNotWork(data: unknown) {
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>DoesNotWork : Symbol(DoesNotWork, Decl(discriminantPropertyCheck.ts, 196, 1))
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>data : Symbol(data, Decl(discriminantPropertyCheck.ts, 198, 21))
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if (isType(data)) {
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>isType : Symbol(isType, Decl(discriminantPropertyCheck.ts, 188, 26))
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>data : Symbol(data, Decl(discriminantPropertyCheck.ts, 198, 21))
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if (data.Name === "TypeA") {
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>data.Name : Symbol(Name, Decl(discriminantPropertyCheck.ts, 178, 17), Decl(discriminantPropertyCheck.ts, 183, 17))
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>data : Symbol(data, Decl(discriminantPropertyCheck.ts, 198, 21))
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>Name : Symbol(Name, Decl(discriminantPropertyCheck.ts, 178, 17), Decl(discriminantPropertyCheck.ts, 183, 17))
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const value1 = data.Value1;
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>value1 : Symbol(value1, Decl(discriminantPropertyCheck.ts, 201, 17))
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>data.Value1 : Symbol(TypeA.Value1, Decl(discriminantPropertyCheck.ts, 179, 18))
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>data : Symbol(data, Decl(discriminantPropertyCheck.ts, 198, 21))
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>Value1 : Symbol(TypeA.Value1, Decl(discriminantPropertyCheck.ts, 179, 18))
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}
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}
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}
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// Repro from #36777
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type TestA = {
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>TestA : Symbol(TestA, Decl(discriminantPropertyCheck.ts, 204, 1))
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type: 'testA';
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>type : Symbol(type, Decl(discriminantPropertyCheck.ts, 208, 14))
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bananas: 3;
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>bananas : Symbol(bananas, Decl(discriminantPropertyCheck.ts, 209, 18))
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}
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type TestB = {
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>TestB : Symbol(TestB, Decl(discriminantPropertyCheck.ts, 211, 1))
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type: 'testB';
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>type : Symbol(type, Decl(discriminantPropertyCheck.ts, 213, 14))
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apples: 5;
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>apples : Symbol(apples, Decl(discriminantPropertyCheck.ts, 214, 18))
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}
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type AllTests = TestA | TestB;
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>AllTests : Symbol(AllTests, Decl(discriminantPropertyCheck.ts, 216, 1))
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>TestA : Symbol(TestA, Decl(discriminantPropertyCheck.ts, 204, 1))
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>TestB : Symbol(TestB, Decl(discriminantPropertyCheck.ts, 211, 1))
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type MapOfAllTests = Record<string, AllTests>;
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>MapOfAllTests : Symbol(MapOfAllTests, Decl(discriminantPropertyCheck.ts, 218, 30))
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>Record : Symbol(Record, Decl(lib.es5.d.ts, --, --))
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>AllTests : Symbol(AllTests, Decl(discriminantPropertyCheck.ts, 216, 1))
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const doTestingStuff = (mapOfTests: MapOfAllTests, ids: string[]) => {
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>doTestingStuff : Symbol(doTestingStuff, Decl(discriminantPropertyCheck.ts, 222, 5))
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>mapOfTests : Symbol(mapOfTests, Decl(discriminantPropertyCheck.ts, 222, 24))
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>MapOfAllTests : Symbol(MapOfAllTests, Decl(discriminantPropertyCheck.ts, 218, 30))
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>ids : Symbol(ids, Decl(discriminantPropertyCheck.ts, 222, 50))
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ids.forEach(id => {
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>ids.forEach : Symbol(Array.forEach, Decl(lib.es5.d.ts, --, --))
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>ids : Symbol(ids, Decl(discriminantPropertyCheck.ts, 222, 50))
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>forEach : Symbol(Array.forEach, Decl(lib.es5.d.ts, --, --))
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>id : Symbol(id, Decl(discriminantPropertyCheck.ts, 223, 16))
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let test;
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>test : Symbol(test, Decl(discriminantPropertyCheck.ts, 224, 11))
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test = mapOfTests[id];
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>test : Symbol(test, Decl(discriminantPropertyCheck.ts, 224, 11))
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>mapOfTests : Symbol(mapOfTests, Decl(discriminantPropertyCheck.ts, 222, 24))
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>id : Symbol(id, Decl(discriminantPropertyCheck.ts, 223, 16))
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if (test.type === 'testA') {
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>test.type : Symbol(type, Decl(discriminantPropertyCheck.ts, 208, 14), Decl(discriminantPropertyCheck.ts, 213, 14))
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>test : Symbol(test, Decl(discriminantPropertyCheck.ts, 224, 11))
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>type : Symbol(type, Decl(discriminantPropertyCheck.ts, 208, 14), Decl(discriminantPropertyCheck.ts, 213, 14))
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console.log(test.bananas);
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>console.log : Symbol(Console.log, Decl(lib.dom.d.ts, --, --))
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>console : Symbol(console, Decl(lib.dom.d.ts, --, --))
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>log : Symbol(Console.log, Decl(lib.dom.d.ts, --, --))
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>test.bananas : Symbol(bananas, Decl(discriminantPropertyCheck.ts, 209, 18))
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>test : Symbol(test, Decl(discriminantPropertyCheck.ts, 224, 11))
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>bananas : Symbol(bananas, Decl(discriminantPropertyCheck.ts, 209, 18))
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}
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switch (test.type) {
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>test.type : Symbol(type, Decl(discriminantPropertyCheck.ts, 208, 14), Decl(discriminantPropertyCheck.ts, 213, 14))
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>test : Symbol(test, Decl(discriminantPropertyCheck.ts, 224, 11))
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>type : Symbol(type, Decl(discriminantPropertyCheck.ts, 208, 14), Decl(discriminantPropertyCheck.ts, 213, 14))
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case 'testA': {
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console.log(test.bananas);
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>console.log : Symbol(Console.log, Decl(lib.dom.d.ts, --, --))
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>console : Symbol(console, Decl(lib.dom.d.ts, --, --))
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>log : Symbol(Console.log, Decl(lib.dom.d.ts, --, --))
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>test.bananas : Symbol(bananas, Decl(discriminantPropertyCheck.ts, 209, 18))
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>test : Symbol(test, Decl(discriminantPropertyCheck.ts, 224, 11))
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>bananas : Symbol(bananas, Decl(discriminantPropertyCheck.ts, 209, 18))
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}
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}
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});
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};
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