Add loading indicator for search queries

tests/unit/services/map-ui-test.js

@@ -0,0 +1,68 @@
+import { module, test } from 'qunit';
+import { setupTest } from 'marco/tests/helpers';
+
+module('Unit | Service | map-ui', function (hooks) {
+  setupTest(hooks);
+
+  test('it handles loading state correctly', function (assert) {
+    let service = this.owner.lookup('service:map-ui');
+
+    // Initial state
+    assert.strictEqual(
+      service.loadingState,
+      null,
+      'loadingState starts as null'
+    );
+
+    // Start loading search A
+    service.startLoading('search', 'A');
+    assert.deepEqual(
+      service.loadingState,
+      { type: 'search', value: 'A' },
+      'loadingState is set to search A'
+    );
+
+    // Stop loading search A (successful case)
+    service.stopLoading('search', 'A');
+    assert.strictEqual(
+      service.loadingState,
+      null,
+      'loadingState is cleared when stopped with matching parameters'
+    );
+  });
+
+  test('it handles race condition: stopLoading only clears if parameters match', function (assert) {
+    let service = this.owner.lookup('service:map-ui');
+
+    // 1. Start loading search A
+    service.startLoading('search', 'A');
+    assert.deepEqual(service.loadingState, { type: 'search', value: 'A' });
+
+    // 2. Start loading search B (interruption)
+    // In a real app, search B would start before search A finishes.
+    service.startLoading('search', 'B');
+    assert.deepEqual(
+      service.loadingState,
+      { type: 'search', value: 'B' },
+      'loadingState updates to search B'
+    );
+
+    // 3. Search A finishes and tries to stop loading
+    // The service should ignore this because current loading state is for B
+    service.stopLoading('search', 'A');
+
+    assert.deepEqual(
+      service.loadingState,
+      { type: 'search', value: 'B' },
+      'loadingState remains search B even after stopping search A'
+    );
+
+    // 4. Search B finishes
+    service.stopLoading('search', 'B');
+    assert.strictEqual(
+      service.loadingState,
+      null,
+      'loadingState is cleared when search B stops'
+    );
+  });
+});