fix(cli): `expandFiles` path normalization for windows

src/cli/__mocks__/glob.ts

+import path from "path";
 import minimatch from "minimatch";
 
 const glob: any = jest.requireActual("glob");
@@ -9,7 +10,7 @@ interface Options {
 let mockFiles: string[] = null;
 
 function setMockFiles(files: string[]): void {
-	mockFiles = files;
+	mockFiles = files.map((cur) => path.normalize(cur));
 }
 
 function resetMock(): void {
@@ -25,7 +26,10 @@ function syncMock(pattern: string, options: Options = {}): string[] {
 	/* slice the cwd away since it is prepended automatically and makes it harder
 	 * to test with */
 	const cwd = options.cwd || "";
-	const dir = cwd.replace(process.cwd(), "").replace(/^\/(.*)/, "$1/");
+	const dir = cwd
+		.replace(process.cwd(), "")
+		.replace("\\", "/")
+		.replace(/^\/(.*)/, `$1${path.sep}`);
 
 	let src = mockFiles;
 	if (dir) {

src/cli/expand-files.spec.ts

@@ -2,6 +2,7 @@ jest.mock("fs");
 jest.mock("glob");
 
 import fs from "fs";
+import path from "path";
 import glob from "glob";
 import { CLI } from "./cli";
 
@@ -41,9 +42,9 @@ describe("expandFiles()", () => {
 		expect.assertions(3);
 		const spy = jest.spyOn(glob, "sync");
 		expect(cli.expandFiles(["foo.html", "bar/**/*.html"])).toEqual([
-			"foo.html",
-			"bar/fred.html",
-			"bar/barney.html",
+			path.normalize("foo.html"),
+			path.normalize("bar/fred.html"),
+			path.normalize("bar/barney.html"),
 		]);
 		expect(spy).toHaveBeenCalledWith("foo.html", expect.anything());
 		expect(spy).toHaveBeenCalledWith("bar/**/*.html", expect.anything());
@@ -52,26 +53,26 @@ describe("expandFiles()", () => {
 	it("should expand directories (default extensions)", () => {
 		expect.assertions(1);
 		expect(cli.expandFiles(["bar"])).toEqual([
-			"bar/fred.html",
-			"bar/barney.html",
+			path.normalize("bar/fred.html"),
+			path.normalize("bar/barney.html"),
 		]);
 	});
 
 	it("should expand directories (explicit extensions)", () => {
 		expect.assertions(1);
 		expect(cli.expandFiles(["bar"], { extensions: ["js", "json"] })).toEqual([
-			"bar/fred.json",
-			"bar/barney.js",
+			path.normalize("bar/fred.json"),
+			path.normalize("bar/barney.js"),
 		]);
 	});
 
 	it("should expand directories (no extensions => all files)", () => {
 		expect.assertions(1);
 		expect(cli.expandFiles(["bar"], { extensions: [] })).toEqual([
-			"bar/fred.html",
-			"bar/fred.json",
-			"bar/barney.html",
-			"bar/barney.js",
+			path.normalize("bar/fred.html"),
+			path.normalize("bar/fred.json"),
+			path.normalize("bar/barney.html"),
+			path.normalize("bar/barney.js"),
 		]);
 	});
 

src/cli/expand-files.ts

@@ -27,9 +27,9 @@ function directoryPattern(extensions: string[]): string {
 		case 0:
 			return "**";
 		case 1:
-			return `**/*.${extensions[0]}`;
+			return path.join("**", `*.${extensions[0]}`);
 		default:
-			return `**/*.{${extensions.join(",")}}`;
+			return path.join("**", `*.{${extensions.join(",")}}`);
 	}
 }