Accept baselines

Author: ahejlsberg

tests/baselines/reference/typePredicateStructuralMatch.errors.txt

@@ -0,0 +1,36 @@
+tests/cases/compiler/typePredicateStructuralMatch.ts(17,12): error TS2322: Type 'Result[] | { data: Result[]; }' is not assignable to type 'Result[]'.
+  Type '{ data: Result[]; }' is not assignable to type 'Result[]'.
+    Property 'length' is missing in type '{ data: Result[]; }'.
+
+
+==== tests/cases/compiler/typePredicateStructuralMatch.ts (1 errors) ====
+    // Repro from #12235
+    
+    getResults1([]);
+    getResults1({data: []});
+    
+    getResults2([]);
+    getResults2({data: []});
+    
+    type Result = { value: string };
+    type Results = Result[];
+    
+    function isResponseInData<T>(value: T | { data: T}): value is { data: T } {
+        return value.hasOwnProperty('data');
+    }
+    
+    function getResults1(value: Results | { data: Results }): Results {
+        return isResponseInData(value) ? value.data : value;
+               ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+!!! error TS2322: Type 'Result[] | { data: Result[]; }' is not assignable to type 'Result[]'.
+!!! error TS2322:   Type '{ data: Result[]; }' is not assignable to type 'Result[]'.
+!!! error TS2322:     Property 'length' is missing in type '{ data: Result[]; }'.
+    }
+    
+    function isPlainResponse<T>(value: T | { data: T}): value is T {
+        return !value.hasOwnProperty('data');
+    }
+    
+    function getResults2(value: Results | { data: Results }): Results {
+        return isPlainResponse(value) ? value : value.data;
+    }

tests/baselines/reference/typePredicateStructuralMatch.js

@@ -0,0 +1,46 @@
+//// [typePredicateStructuralMatch.ts]
+// Repro from #12235
+
+getResults1([]);
+getResults1({data: []});
+
+getResults2([]);
+getResults2({data: []});
+
+type Result = { value: string };
+type Results = Result[];
+
+function isResponseInData<T>(value: T | { data: T}): value is { data: T } {
+    return value.hasOwnProperty('data');
+}
+
+function getResults1(value: Results | { data: Results }): Results {
+    return isResponseInData(value) ? value.data : value;
+}
+
+function isPlainResponse<T>(value: T | { data: T}): value is T {
+    return !value.hasOwnProperty('data');
+}
+
+function getResults2(value: Results | { data: Results }): Results {
+    return isPlainResponse(value) ? value : value.data;
+}
+
+//// [typePredicateStructuralMatch.js]
+// Repro from #12235
+getResults1([]);
+getResults1({ data: [] });
+getResults2([]);
+getResults2({ data: [] });
+function isResponseInData(value) {
+    return value.hasOwnProperty('data');
+}
+function getResults1(value) {
+    return isResponseInData(value) ? value.data : value;
+}
+function isPlainResponse(value) {
+    return !value.hasOwnProperty('data');
+}
+function getResults2(value) {
+    return isPlainResponse(value) ? value : value.data;
+}