history testing on tools

src/client/ts/tools/eyedropperTool.ts

@@ -66,7 +66,9 @@ export class EyedropperTool extends Tool {
 
     endUse(pos: Vec2) {
         this.continueUse(pos);
-        this.icon.removeAttribute("style");
+        if (this.icon != null) {
+            this.icon.removeAttribute("style");
+        }
     }
 
     drawPreview(layer: Layer) {

test/test-tools.ts

@@ -0,0 +1,33 @@
+import {Vec2} from "../src/client/ts/vec2";
+import {Project} from "../src/client/ts/docState";
+import {ActionInterface} from "../src/client/ts/tools/actionInterface";
+
+describe('History', function () {
+    let w = 20;
+    let h = 20;
+    let randPos = function () {
+        return new Vec2(Math.floor(Math.random() * w), Math.floor(Math.random() * h));
+    };
+    let proj = new Project(null, 'test project', new Vec2(w, h));
+    for (let t of proj.toolRegistry.getTools()) {
+        let need_ui = false;
+        for (let req of t.getSettings().getRequests()) {
+            if (req.name == "user_interface") {
+                need_ui = true;
+            }
+        }
+        if (!need_ui) {
+            it('works with tool ' + t.getName(), async function () {
+                proj.currentLayer.reset();
+                let initState = proj.currentLayer.getHTMLElement().toDataURL();
+                t.startUse(proj.currentLayer.getContext().getImageData(0, 0, w, h), randPos());
+                t.continueUse(randPos());
+                t.endUse(randPos());
+                let undo: Promise<ActionInterface> = t.applyTool(proj.currentLayer, true);
+                proj.link.sendAction(await undo);
+                let endState = proj.currentLayer.getHTMLElement().toDataURL();
+                expect(initState).toEqual(endState);
+            });
+        }
+    }
+});