test: add test for parser (#192)

Author: ysknsid25

test/parser.test.ts

@@ -0,0 +1,91 @@
+import { parseRawArgs } from "../src/_parser";
+import { describe, it, expect } from "vitest";
+
+describe("parseRawArgs", () => {
+  it("parses arguments correctly", () => {
+    const args = ["--name", "John", "--age", "30"];
+    const opts = { boolean: ["age"] };
+    const result = parseRawArgs(args, opts);
+
+    expect(result).toEqual({
+      _: [30],
+      name: "John",
+      age: true,
+    });
+  });
+
+  it("handles unknown options", () => {
+    const args = ["--unknown", "value"];
+    const opts = { unknown: () => false };
+    const result = parseRawArgs(args, opts);
+
+    expect(result).toEqual(false);
+  });
+
+  it("handles default values", () => {
+    const args = [];
+    const opts = { default: { name: "Default" } };
+    const result = parseRawArgs(args, opts);
+
+    expect(result).toEqual({
+      _: [],
+      name: "Default",
+    });
+  });
+
+  it("handles aliases", () => {
+    const args = ["-n", "John"];
+    const opts = { alias: { n: "name" } };
+    const result = parseRawArgs(args, opts);
+
+    expect(result).toEqual({
+      _: [],
+      n: "John",
+      name: "John",
+    });
+  });
+
+  it("handles boolean flags", () => {
+    const args = ["--flag"];
+    const opts = { boolean: ["flag"] };
+    const result = parseRawArgs(args, opts);
+
+    expect(result).toEqual({
+      _: [],
+      flag: true,
+    });
+  });
+
+  it("handles string flags", () => {
+    const args = ["--name", "John"];
+    const opts = { string: ["name"] };
+    const result = parseRawArgs(args, opts);
+
+    expect(result).toEqual({
+      _: [],
+      name: "John",
+    });
+  });
+
+  it("handles mixed flags", () => {
+    const args = ["--name", "John", "--age", "30"];
+    const opts = { string: ["name"], boolean: ["age"] };
+    const result = parseRawArgs(args, opts);
+
+    expect(result).toEqual({
+      _: [30],
+      name: "John",
+      age: true,
+    });
+  });
+
+  it("handles empty arguments", () => {
+    const args = [];
+    const opts = {};
+    const result = parseRawArgs(args, opts);
+
+    expect(result).toEqual({
+      _: [],
+    });
+  });
+});