feat: Add getOS()

__tests__/get-os.test.js

@@ -0,0 +1,17 @@
+const getOS = require("../lib/get-os");
+
+describe("getOS", () => {
+  test("test", () => {
+    expect(getOS("linux")).toBe("Linux");
+    expect(getOS("darwin")).toBe("macOS");
+  });
+
+  test("test exception", () => {
+    expect(() => {
+      getOS("win32");
+    }).toThrowError("Windows is not supported");
+    expect(() => {
+      getOS("centos");
+    }).toThrowError("centos is not supported");
+  });
+});