Add initial minimatch support

__tests__/pathUtils.test.ts

@@ -0,0 +1,42 @@
+import * as path from "path";
+import * as os from "os";
+import * as pathUtils from "../src/utils/pathUtils";
+
+jest.mock("@actions/core");
+jest.mock("os");
+
+test("expandPaths with no ~ in path", () => {
+    const filePath = ".cache/yarn";
+
+    const resolvedPath = pathUtils.expandPaths([filePath]);
+
+    const expectedPath = [path.resolve(filePath)];
+    expect(resolvedPath).toStrictEqual(expectedPath);
+});
+
+test("expandPaths with ~ in path", () => {
+    const filePath = "~/.cache/yarn";
+
+    const homedir = jest.requireActual("os").homedir();
+    const homedirMock = jest.spyOn(os, "homedir");
+    homedirMock.mockImplementation(() => {
+        return homedir;
+    });
+
+    const resolvedPath = pathUtils.expandPaths([filePath]);
+
+    const expectedPath = [path.join(homedir, ".cache/yarn")];
+    expect(resolvedPath).toStrictEqual(expectedPath);
+});
+
+test("expandPaths with home not found", () => {
+    const filePath = "~/.cache/yarn";
+    const homedirMock = jest.spyOn(os, "homedir");
+    homedirMock.mockImplementation(() => {
+        return "";
+    });
+
+    expect(() => pathUtils.expandPaths([filePath])).toThrow(
+        "Unable to resolve `~` to HOME"
+    );
+});