const test = require("node:test");
const assert = require("node:assert/strict");
const { extractUserFcmTokens } = require("./notification_tokens");

test("extractUserFcmTokens supports legacy single token", () => {
    const tokens = extractUserFcmTokens({ fcmToken: "token_1" });
    assert.deepEqual(tokens, ["token_1"]);
});

test("extractUserFcmTokens merges single and multi token formats", () => {
    const tokens = extractUserFcmTokens({
        fcmToken: "token_legacy",
        fcmTokens: ["token_a", "token_b"],
    });
    assert.deepEqual(tokens, ["token_legacy", "token_a", "token_b"]);
});

test("extractUserFcmTokens filters invalid values", () => {
    const tokens = extractUserFcmTokens({
        fcmToken: "",
        fcmTokens: ["valid", null, 42, ""],
    });
    assert.deepEqual(tokens, ["valid"]);
});