fix: fix error when saving and deleting heatmap layer

Co-authored-by: David Larlet <david@larlet.fr>

umap/static/umap/js/modules/data/features.js

@@ -614,7 +614,7 @@ class Feature {
         this.datalayer.hideFeature(this)
         this.makeUI()
         this.datalayer.showFeature(this)
-      } else {
+      } else if (this.datalayer?.isBrowsable()) {
         this.ui._redraw()
       }
     }

umap/static/umap/js/modules/rendering/layers/heat.js

@@ -41,6 +41,11 @@ export const Heat = L.HeatLayer.extend({
     }
   },
 
+  removeLayer: (layer) => {
+    // No op, there is no "removeLatLng" in Leaflet.heat
+    // but this method is expected by DataLayer
+  },
+
   onAdd: function (map) {
     LayerMixin.onAdd.call(this, map)
     return L.HeatLayer.prototype.onAdd.call(this, map)

umap/tests/integration/test_heatmap.py

@@ -0,0 +1,41 @@
+import json
+from pathlib import Path
+
+import pytest
+from playwright.sync_api import expect
+
+from ..base import DataLayerFactory
+
+pytestmark = pytest.mark.django_db
+
+
+def test_heatmap(map, live_server, page):
+    path = Path(__file__).parent.parent / "fixtures/heatmap_data.json"
+    data = json.loads(path.read_text())
+    DataLayerFactory(data=data, map=map)
+    page.goto(f"{live_server.url}{map.get_absolute_url()}")
+    expect(page.locator("canvas.leaflet-heatmap-layer")).to_be_visible()
+
+
+def test_can_create_heatmap_after_import(live_server, page, tilelayer, settings):
+    settings.UMAP_ALLOW_ANONYMOUS = True
+    page.goto(f"{live_server.url}/en/map/new")
+    page.get_by_title("Import data").click()
+    file_input = page.locator("input[type='file']")
+    with page.expect_file_chooser() as fc_info:
+        file_input.click()
+    file_chooser = fc_info.value
+    path = Path(__file__).parent.parent / "fixtures/heatmap_data.json"
+    file_chooser.set_files(path)
+    page.get_by_role("button", name="Import data", exact=True).click()
+    page.get_by_role("button", name="Manage layers").click()
+    page.get_by_role("button", name="Edit", exact=True).click()
+    page.get_by_role("combobox").select_option("Heat")
+    page.get_by_role("button", name="Save draft").click()
+    expect(page.locator("canvas.leaflet-heatmap-layer")).to_be_visible()
+
+    # Test we can delete it and save
+    page.get_by_text("Advanced actions").click()
+    page.get_by_role("button", name="Delete").click()
+    page.get_by_role("button", name="Save draft").click()
+    expect(page.locator("canvas.leaflet-heatmap-layer")).to_be_hidden()