feat: add more tests for tool built-ins (#5)

src/tests/tools/bash.test.ts

@@ -0,0 +1,81 @@
+import { describe, expect, test } from "bun:test";
+import { bash } from "../../tools/impl/Bash";
+
+describe("Bash tool", () => {
+  test("executes simple command", async () => {
+    const result = await bash({
+      command: "echo 'Hello, World!'",
+      description: "Test echo",
+    });
+
+    expect(result.content).toBeDefined();
+    expect(result.content[0].text).toContain("Hello, World!");
+    expect(result.isError).toBeUndefined();
+  });
+
+  test("captures stderr in output", async () => {
+    const result = await bash({
+      command: "echo 'error message' >&2",
+      description: "Test stderr",
+    });
+
+    expect(result.content[0].text).toContain("error message");
+  });
+
+  test("returns error for failed command", async () => {
+    const result = await bash({
+      command: "exit 1",
+      description: "Test exit code",
+    });
+
+    expect(result.isError).toBe(true);
+    expect(result.content[0].text).toContain("Exit code");
+  });
+
+  test("times out long-running command", async () => {
+    const result = await bash({
+      command: "sleep 10",
+      description: "Test timeout",
+      timeout: 100,
+    });
+
+    expect(result.isError).toBe(true);
+    expect(result.content[0].text).toContain("timed out");
+  }, 2000);
+
+  test("runs command in background mode", async () => {
+    const result = await bash({
+      command: "echo 'background'",
+      description: "Test background",
+      run_in_background: true,
+    });
+
+    expect(result.content[0].text).toContain("background with ID:");
+    expect(result.content[0].text).toMatch(/bash_\d+/);
+  });
+
+  test("handles complex commands with pipes", async () => {
+    // Skip on Windows - pipe syntax is different
+    if (process.platform === "win32") {
+      return;
+    }
+
+    const result = await bash({
+      command: "echo -e 'foo\\nbar\\nbaz' | grep bar",
+      description: "Test pipe",
+    });
+
+    expect(result.content[0].text).toContain("bar");
+    expect(result.content[0].text).not.toContain("foo");
+  });
+
+  test("lists background processes with /bashes command", async () => {
+    const result = await bash({
+      command: "/bashes",
+      description: "List processes",
+    });
+
+    expect(result.content).toBeDefined();
+    expect(result.content[0].text).toBeDefined();
+  });
+});