Add tests

tests/cases/fourslash/incrementalParsingDynamicImport2.ts

@@ -0,0 +1,13 @@
+/// <reference path="fourslash.ts"/>
+
+// @lib: es2015
+
+// @Filename: ./foo.ts
+//// export function bar() { return 1; }
+
+// @Filename: ./0.ts
+//// /*1*/ import { bar } from "./foo"
+verify.numberOfErrorsInCurrentFile(0);
+goTo.marker("1");
+edit.insert("var x = ");
+verify.numberOfErrorsInCurrentFile(1);

tests/cases/fourslash/incrementalParsingDynamicImport3.ts

@@ -0,0 +1,14 @@
+/// <reference path="fourslash.ts"/>
+
+// @lib: es2015
+
+// @Filename: ./foo.ts
+//// export function bar() { return 1; }
+
+// @Filename: ./0.ts
+//// var x = import/*1*/
+
+verify.numberOfErrorsInCurrentFile(0);
+goTo.marker("1");
+edit.insert("(");
+verify.numberOfErrorsInCurrentFile(2);