1 files changed, 55 insertions, 0 deletions
diff --git a/tst/argv.test.ts b/tst/argv.test.ts
new file mode 100644
index 0000000..1eae059
--- /dev/null
+++ b/tst/argv.test.ts
@@ -0,0 +1,55 @@
+import { argv, getArg, isArgKey } from '../lib/index';
+
+describe('process/argv', () => {
+    test('isArgKey detects keys', () => {
+        expect(isArgKey('--foo')).toBe(true);
+        expect(isArgKey('foo')).toBe(false);
+        expect(isArgKey('-f')).toBe(false);
+    });
+
+    test('getArg returns absent default when missing', () => {
+        const res = getArg('--foo', ['--bar', 'x'], { absent: 'nope', present: (v: string) => v });
+        expect(res.right().get()).toBe('nope');
+    });
+
+    test('getArg errors when missing and no absent default', () => {
+        const res = getArg('--foo', ['--bar', 'x'], { present: (v: string) => v });
+        expect(res.left().get().message).toMatch(/arg --foo is not present/);
+    });
+
+    test('getArg reads value from equals form', () => {
+        const res = getArg('--foo', ['--foo=bar'], { present: (v: string) => v });
+        expect(res.right().get()).toBe('bar');
+    });
+
+    test('getArg reads value from next token form', () => {
+        const res = getArg('--foo', ['--foo', 'bar'], { present: (v: string) => v });
+        expect(res.right().get()).toBe('bar');
+    });
+
+    test('getArg uses unspecified when value missing', () => {
+        const res = getArg('--foo', ['--foo', '--bar', 'x'], {
+            unspecified: 'default',
+            present: (v: string) => v,
+        });
+        expect(res.right().get()).toBe('default');
+    });
+
+    test('argv maps multiple args with handlers', () => {
+        const res = argv(
+            ['--port', '--host'] as const,
+            {
+                '--port': {
+                    present: (v: string) => parseInt(v, 10),
+                },
+                '--host': {
+                    absent: '127.0.0.1',
+                    present: (v: string) => v,
+                },
+            },
+            ['--port', '8080'],
+        );
+
+        expect(res.right().get()).toEqual({ '--port': 8080, '--host': '127.0.0.1' });
+    });
+});