fix(typescript): print typeArguments in TSExpressionWithTypeArguments (#1530)

src/printer.js

@@ -1590,7 +1590,10 @@ function genericPrintNoParens(path, options, print, args) {
     case "TSHeritageClause":
       return join(", ", path.map(print, "types"));
     case "TSExpressionWithTypeArguments":
-      return path.call(print, "expression");
+      return concat([
+        path.call(print, "expression"),
+        printTypeParameters(path, options, print, "typeArguments")
+      ]);
     case "TemplateElement":
       return join(literalline, n.value.raw.split(/\r?\n/g));
     case "TemplateLiteral":

tests/typescript/compiler/__snapshots__/jsfmt.spec.js.snap

@@ -18,6 +18,43 @@ interface i2 {
 
 `;
 
+exports[`checkInfiniteExpansionTermination.ts 1`] = `
+// Regression test for #1002
+// Before fix this code would cause infinite loop
+
+interface IObservable<T> {
+    n: IObservable<T[]>; // Needed, must be T[]
+}
+
+// Needed
+interface ISubject<T> extends IObservable<T> { }
+
+interface Foo { x }
+interface Bar { y }
+
+var values: IObservable<Foo>;
+var values2: ISubject<Bar>;
+values = values2;
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+// Regression test for #1002
+// Before fix this code would cause infinite loop
+
+interface IObservable<T> {
+  n: IObservable<T[]> // Needed, must be T[]
+}
+
+// Needed
+interface ISubject<T> extends IObservable<T> {}
+
+interface Foo { x }
+interface Bar { y }
+
+var values: IObservable<Foo>;
+var values2: ISubject<Bar>;
+values = values2;
+
+`;
+
 exports[`functionOverloadsOnGenericArity1.ts 1`] = `
 // overloading on arity not allowed
 interface C {

tests/typescript/compiler/checkInfiniteExpansionTermination.ts

@@ -0,0 +1,16 @@
+// Regression test for #1002
+// Before fix this code would cause infinite loop
+
+interface IObservable<T> {
+    n: IObservable<T[]>; // Needed, must be T[]
+}
+
+// Needed
+interface ISubject<T> extends IObservable<T> { }
+
+interface Foo { x }
+interface Bar { y }
+
+var values: IObservable<Foo>;
+var values2: ISubject<Bar>;
+values = values2;