tests: Rename the Node tests to *.cjs.

Signed-off-by: Anders Kaseorg <anders@zulip.com>

web/tests/ui_util.test.cjs

@@ -0,0 +1,69 @@
+"use strict";
+
+const assert = require("node:assert/strict");
+
+const {zrequire} = require("./lib/namespace.cjs");
+const {run_test} = require("./lib/test.cjs");
+const $ = require("./lib/zjquery.cjs");
+
+const ui_util = zrequire("ui_util");
+
+run_test("potentially_collapse_quotes", ({override_rewire}) => {
+    const $element = $.create("message-content");
+    let children = [];
+    $element.children = () => children;
+
+    children = [
+        $.create("normal paragraph 1"),
+        $.create("blockquote"),
+        $.create("normal paragraph 2"),
+        $.create("user said paragraph"),
+        $.create("message quote"),
+        $.create("normal paragraph 3"),
+    ];
+    override_rewire(ui_util, "get_collapsible_status_array", () => [
+        false,
+        true,
+        false,
+        true,
+        true,
+        false,
+    ]);
+    // When there are both collapsible and non-collapsible elements, for
+    // multiple collapsible elements in a row, only the first element
+    // should be collapsed, and the rest's text should be removed. Non-
+    // collapsible elements should not be touched.
+    let collapsed = ui_util.potentially_collapse_quotes($element);
+    assert.equal(collapsed, true);
+    let expected_texts = ["never-been-set", "[…]", "never-been-set", "[…]", "", "never-been-set"];
+    assert.deepEqual(
+        $element.children().map(($el) => $el.text()),
+        expected_texts,
+    );
+
+    children = [
+        $.create("normal paragraph 4"),
+        $.create("normal paragraph 5"),
+        $.create("normal paragraph 6"),
+    ];
+    override_rewire(ui_util, "get_collapsible_status_array", () => [false, false, false]);
+    // For all non-collapsible elements, none should be collapsed.
+    collapsed = ui_util.potentially_collapse_quotes($element);
+    assert.equal(collapsed, false);
+    expected_texts = ["never-been-set", "never-been-set", "never-been-set"];
+    assert.deepEqual(
+        $element.children().map(($el) => $el.text()),
+        expected_texts,
+    );
+
+    children = [$.create("blockquote 1"), $.create("blockquote 2"), $.create("blockquote 3")];
+    override_rewire(ui_util, "get_collapsible_status_array", () => [true, true, true]);
+    // For all collapsible elements, none should be collapsed.
+    collapsed = ui_util.potentially_collapse_quotes($element);
+    assert.equal(collapsed, false);
+    expected_texts = ["never-been-set", "never-been-set", "never-been-set"];
+    assert.deepEqual(
+        $element.children().map(($el) => $el.text()),
+        expected_texts,
+    );
+});