Init spatial

.gitignore

@@ -37,3 +37,5 @@ __MACOSX
 # custom
 .next
 out/
+# hunkwise
+.vscode/hunkwise/

__mocks__/@hms-dbmi/viv.js

@@ -1,3 +1,29 @@
+// Minimal viv stubs for jsdom tests. The real layers need WebGL; tests only need
+// the imports to resolve (BitmaskLayer extends XRLayer; SpatialViewer constructs
+// MultiscaleImageLayer and reads getDefaultInitialViewState).
+class StubLayer {
+  constructor(props) {
+    this.props = props;
+  }
+
+  // lifecycle methods invoked via super.* by subclasses — no-ops in tests
+  // eslint-disable-next-line class-methods-use-this
+  updateState() {}
+
+  // eslint-disable-next-line class-methods-use-this
+  finalizeState() {}
+
+  // eslint-disable-next-line class-methods-use-this
+  draw() {}
+}
+StubLayer.defaultProps = {};
+
+class XRLayer extends StubLayer {}
+class MultiscaleImageLayer extends StubLayer {}
+
 module.exports = {
   ZarrPixelSource: jest.fn(),
+  XRLayer,
+  MultiscaleImageLayer,
+  getDefaultInitialViewState: jest.fn(() => ({ target: [0, 0, 0], zoom: 0 })),
 };