fix: only do type checking while compiling file

e2e/__cases__/diagnostics/main.spec.ts

@@ -1,5 +1,11 @@
-import { strInNumOut } from './main'
+import { Thing } from "./main";
 
-it('should pass', () => {
-  expect(strInNumOut('1')).toBe('1')
-})
+export const thing: Thing = { a: 1 };
+
+function doTheThing() {
+  return 1 + 2;
+}
+
+it("should do the thing", () => {
+  expect(doTheThing()).toEqual(3);
+});

e2e/__cases__/diagnostics/main.ts

@@ -1,3 +1 @@
-export function strInNumOut(input: string): number {
-  return input
-}
+export type Thing = { a: number, b: number }

e2e/__cases__/isolated-modules/main.spec.ts

@@ -0,0 +1,11 @@
+import { Thing } from "./main";
+
+// See the Thing definition.  Changing the type definition should result in a compile failure here.
+export const thing: Thing = { a: 1 };
+function doTheThing() {
+  return 1 + 2;
+}
+
+it("should do the thing", () => {
+  expect(doTheThing()).toEqual(3);
+});

e2e/__cases__/isolated-modules/main.ts

@@ -0,0 +1 @@
+export type Thing = { a: number, b: number }

e2e/__helpers__/templates.ts

@@ -6,7 +6,7 @@ export enum PackageSets {
   // invalid
   unsupportedVersion = 'with-unsupported-version',
 }
-export const allValidPackageSets = [PackageSets.default, PackageSets.babel7, PackageSets.babel7StringConfig, PackageSets.typescript2_7],
-  allPackageSetsWithPreset = [PackageSets.default, PackageSets.babel7, PackageSets.babel7StringConfig, PackageSets.typescript2_7],
-  allPackageSetsWithProgram = [PackageSets.default, PackageSets.babel7, PackageSets.babel7StringConfig],
-  allPackageSetsWithoutProgram = [PackageSets.typescript2_7, PackageSets.unsupportedVersion]
+export const allValidPackageSets = [PackageSets.default, PackageSets.babel7, PackageSets.babel7StringConfig, PackageSets.typescript2_7]
+export const allPackageSetsWithPreset = [PackageSets.default, PackageSets.babel7, PackageSets.babel7StringConfig, PackageSets.typescript2_7]
+export const allPackageSetsWithProgram = [PackageSets.default, PackageSets.babel7, PackageSets.babel7StringConfig]
+export const allPackageSetsWithoutProgram = [PackageSets.typescript2_7, PackageSets.unsupportedVersion]