Fix validation to accept false as agent value

Fixes #2360

Author: sindresorhus

source/core/options.ts

@@ -1188,7 +1188,7 @@ export default class Options {
 			}
 
 			// @ts-expect-error - No idea why `value[key]` doesn't work here.
-			assert.any([is.object, is.undefined], value[key]);
+			assert.any([is.object, is.undefined, (v: unknown) => v === false], value[key]);
 		}
 
 		if (this._merging) {

test/agent.ts

@@ -219,3 +219,48 @@ test('accept undefined agent', withServer, async (t, server, got) => {
 		agent: undefinedAgent,
 	})).body);
 });
+
+test('accept false as agent value', withServer, async (t, server, got) => {
+	server.get('/', (_request, response) => {
+		response.end('ok');
+	});
+
+	// Should not throw error when setting agent types to false
+	t.notThrows(() => got.extend({
+		agent: {
+			http: false,
+			https: false,
+			http2: false,
+		},
+	}));
+
+	// Should successfully make request with false agent values
+	const response = await got({
+		agent: {
+			http: false,
+		},
+	});
+
+	t.is(response.body, 'ok');
+});
+
+test('accept mixed agent values with false', withServer, async (t, server, got) => {
+	server.get('/', (_request, response) => {
+		response.end('ok');
+	});
+
+	const {agent: httpAgent} = createAgentSpy(HttpAgent);
+
+	// Should accept a mix of agent instance and false values
+	const response = await got({
+		agent: {
+			http: httpAgent,
+			https: false,
+			http2: false,
+		},
+	});
+
+	t.is(response.body, 'ok');
+
+	httpAgent.destroy();
+});