ReferenceError: IntersectionObserver is not defined at renderTextual (../rendermime/src/renderers.ts:843:20) at Object.renderTextual [as renderError] (../rendermime/src/renderers.ts:1230:3) at RenderedError.renderError [as render] (../rendermime/src/widgets.ts:458:22) at RenderedError.render [as renderModel] (../rendermime/src/widgets.ts:106:16) at LogOutputArea.renderModel [as _setOutput] (src/widget.ts:571:21) at _setOutput (src/widget.ts:297:20) at invokeSlot (../../node_modules/@lumino/signaling/src/index.ts:716:12) at Object.emit (../../node_modules/@lumino/signaling/src/index.ts:638:9) at Signal.emit (../../node_modules/@lumino/signaling/src/index.ts:189:13) at ObservableString.emit [as insert] (../observables/src/observablestring.ts:174:19) at Object.insert [as addText] (src/model.ts:630:19) at OutputAreaModel.addText [as _add] (src/model.ts:361:35) at OutputAreaModel._add [as fromJSON] (src/model.ts:320:12) at Object.<anonymous> (test/widget.spec.ts:294:22)

ReferenceError: IntersectionObserver is not defined at renderTextual (../rendermime/src/renderers.ts:843:20) at Object.renderTextual [as renderError] (../rendermime/src/renderers.ts:1230:3) at RenderedError.renderError [as render] (../rendermime/src/widgets.ts:458:22) at RenderedError.render [as renderModel] (../rendermime/src/widgets.ts:106:16) at LogOutputArea.renderModel [as _setOutput] (src/widget.ts:571:21) at _setOutput (src/widget.ts:297:20) at invokeSlot (../../node_modules/@lumino/signaling/src/index.ts:716:12) at Object.emit (../../node_modules/@lumino/signaling/src/index.ts:638:9) at Signal.emit (../../node_modules/@lumino/signaling/src/index.ts:189:13) at ObservableString.emit [as insert] (../observables/src/observablestring.ts:174:19) at Object.insert [as addText] (src/model.ts:630:19) at OutputAreaModel.addText [as _add] (src/model.ts:361:35) at OutputAreaModel._add [as fromJSON] (src/model.ts:320:12) at Object.<anonymous> (test/widget.spec.ts:425:22)

ReferenceError: IntersectionObserver is not defined at renderTextual (../rendermime/src/renderers.ts:843:20) at Object.renderTextual [as renderText] (../rendermime/src/renderers.ts:790:3) at RenderedText.renderText [as render] (../rendermime/src/widgets.ts:441:22) at RenderedText.render [as renderModel] (../rendermime/src/widgets.ts:106:16) at LogOutputArea.renderModel [as _setOutput] (src/widget.ts:571:21) at LogOutputArea._setOutput (src/widget.ts:330:14) at LogOutputArea.onModelChanged (test/widget.spec.ts:42:11) at invokeSlot (../../node_modules/@lumino/signaling/src/index.ts:716:12) at Object.emit (../../node_modules/@lumino/signaling/src/index.ts:638:9) at Signal.emit (../../node_modules/@lumino/signaling/src/index.ts:189:13) at OutputAreaModel.emit [as _onListChanged] (src/model.ts:451:19) at invokeSlot (../../node_modules/@lumino/signaling/src/index.ts:716:12) at Object.emit (../../node_modules/@lumino/signaling/src/index.ts:638:9) at Signal.emit (../../node_modules/@lumino/signaling/src/index.ts:189:13) at ObservableList.emit [as set] (../observables/src/observablelist.ts:395:19) at OutputAreaModel.set (src/model.ts:249:15) at set (src/widget.ts:718:19) at KernelShellFutureHandler.iopub [as _handleIOPub] (../services/src/kernel/future.ts:260:13) at KernelShellFutureHandler.handleMsg (../services/src/kernel/future.ts:226:9) at ../services/src/kernel/default.ts:1171:13 at async Promise.all (index 0) at KernelConnection._handleDisplayId (../services/src/kernel/default.ts:1167:7) at KernelConnection._handleMessage (../services/src/kernel/default.ts:1569:19)

ReferenceError: IntersectionObserver is not defined at renderTextual (../rendermime/src/renderers.ts:843:20) at Object.renderTextual [as renderText] (../rendermime/src/renderers.ts:790:3) at RenderedText.renderText [as render] (../rendermime/src/widgets.ts:441:22) at RenderedText.render [as renderModel] (../rendermime/src/widgets.ts:106:16) at LogOutputArea.renderModel [as _setOutput] (src/widget.ts:571:21) at LogOutputArea._setOutput (src/widget.ts:330:14) at LogOutputArea.onModelChanged (test/widget.spec.ts:42:11) at invokeSlot (../../node_modules/@lumino/signaling/src/index.ts:716:12) at Object.emit (../../node_modules/@lumino/signaling/src/index.ts:638:9) at Signal.emit (../../node_modules/@lumino/signaling/src/index.ts:189:13) at OutputAreaModel.emit [as _onListChanged] (src/model.ts:451:19) at invokeSlot (../../node_modules/@lumino/signaling/src/index.ts:716:12) at Object.emit (../../node_modules/@lumino/signaling/src/index.ts:638:9) at Signal.emit (../../node_modules/@lumino/signaling/src/index.ts:189:13) at ObservableList.emit [as set] (../observables/src/observablelist.ts:395:19) at OutputAreaModel.set (src/model.ts:249:15) at set (src/widget.ts:718:19) at KernelShellFutureHandler.iopub [as _handleIOPub] (../services/src/kernel/future.ts:260:13) at KernelShellFutureHandler.handleMsg (../services/src/kernel/future.ts:226:9) at ../services/src/kernel/default.ts:1171:13 at async Promise.all (index 0) at KernelConnection._handleDisplayId (../services/src/kernel/default.ts:1167:7) at KernelConnection._handleMessage (../services/src/kernel/default.ts:1569:19)

ReferenceError: IntersectionObserver is not defined at renderTextual (../rendermime/src/renderers.ts:843:20) at Object.renderTextual [as renderText] (../rendermime/src/renderers.ts:790:3) at RenderedText.renderText [as render] (../rendermime/src/widgets.ts:441:22) at RenderedText.render [as renderModel] (../rendermime/src/widgets.ts:106:16) at LogOutputArea.renderModel [as _setOutput] (src/widget.ts:571:21) at LogOutputArea._setOutput (src/widget.ts:330:14) at LogOutputArea.onModelChanged (test/widget.spec.ts:42:11) at invokeSlot (../../node_modules/@lumino/signaling/src/index.ts:716:12) at Object.emit (../../node_modules/@lumino/signaling/src/index.ts:638:9) at Signal.emit (../../node_modules/@lumino/signaling/src/index.ts:189:13) at OutputAreaModel.emit [as _onListChanged] (src/model.ts:451:19) at invokeSlot (../../node_modules/@lumino/signaling/src/index.ts:716:12) at Object.emit (../../node_modules/@lumino/signaling/src/index.ts:638:9) at Signal.emit (../../node_modules/@lumino/signaling/src/index.ts:189:13) at ObservableList.emit [as set] (../observables/src/observablelist.ts:395:19) at OutputAreaModel.set (src/model.ts:249:15) at set (src/widget.ts:718:19) at KernelShellFutureHandler.iopub [as _handleIOPub] (../services/src/kernel/future.ts:260:13) at KernelShellFutureHandler.handleMsg (../services/src/kernel/future.ts:226:9) at ../services/src/kernel/default.ts:1171:13 at async Promise.all (index 1) at KernelConnection._handleDisplayId (../services/src/kernel/default.ts:1167:7) at KernelConnection._handleMessage (../services/src/kernel/default.ts:1569:19)

ReferenceError: IntersectionObserver is not defined at renderTextual (../rendermime/src/renderers.ts:843:20) at Object.renderTextual [as renderText] (../rendermime/src/renderers.ts:790:3) at RenderedText.renderText [as render] (../rendermime/src/widgets.ts:441:22) at RenderedText.render [as renderModel] (../rendermime/src/widgets.ts:106:16) at SimplifiedOutputArea.renderModel [as _setOutput] (src/widget.ts:571:21) at _setOutput (src/widget.ts:297:20) at invokeSlot (../../node_modules/@lumino/signaling/src/index.ts:716:12) at Object.emit (../../node_modules/@lumino/signaling/src/index.ts:638:9) at Signal.emit (../../node_modules/@lumino/signaling/src/index.ts:189:13) at ObservableString.emit [as insert] (../observables/src/observablestring.ts:174:19) at Object.insert [as addText] (src/model.ts:630:19) at OutputAreaModel.addText [as _add] (src/model.ts:361:35) at OutputAreaModel._add [as add] (src/model.ts:284:17) at add (src/widget.ts:706:15) at KernelShellFutureHandler.iopub [as _handleIOPub] (../services/src/kernel/future.ts:260:13) at KernelShellFutureHandler.handleMsg (../services/src/kernel/future.ts:226:9) at KernelConnection._handleMessage (../services/src/kernel/default.ts:1579:9)

ReferenceError: IntersectionObserver is not defined at renderTextual (../rendermime/src/renderers.ts:843:20) at Object.renderTextual [as renderText] (../rendermime/src/renderers.ts:790:3) at RenderedText.renderText [as render] (../rendermime/src/widgets.ts:441:22) at RenderedText.render [as renderModel] (../rendermime/src/widgets.ts:106:16) at SimplifiedOutputArea.renderModel [as _setOutput] (src/widget.ts:571:21) at _setOutput (src/widget.ts:297:20) at invokeSlot (../../node_modules/@lumino/signaling/src/index.ts:716:12) at Object.emit (../../node_modules/@lumino/signaling/src/index.ts:638:9) at Signal.emit (../../node_modules/@lumino/signaling/src/index.ts:189:13) at ObservableString.emit [as insert] (../observables/src/observablestring.ts:174:19) at Object.insert [as addText] (src/model.ts:630:19) at OutputAreaModel.addText [as _add] (src/model.ts:361:35) at OutputAreaModel._add [as add] (src/model.ts:284:17) at add (src/widget.ts:706:15) at KernelShellFutureHandler.iopub [as _handleIOPub] (../services/src/kernel/future.ts:260:13) at KernelShellFutureHandler.handleMsg (../services/src/kernel/future.ts:226:9) at KernelConnection._handleMessage (../services/src/kernel/default.ts:1579:9)

expect(received).toBe(expected) // Object.is equality - Expected - 1 + Received + 4 - Javascript Error: IntersectionObserver is not defined + Hello Jupyter! 0 + Hello Jupyter! 1 + Hello Jupyter! 2 + at Object.<anonymous> (test/widget.spec.ts:543:41)

ReferenceError: IntersectionObserver is not defined at renderTextual (../rendermime/src/renderers.ts:843:20) at Object.renderTextual [as renderError] (../rendermime/src/renderers.ts:1230:3) at RenderedError.renderError [as render] (../rendermime/src/widgets.ts:458:22) at RenderedError.render [as renderModel] (../rendermime/src/widgets.ts:106:16) at LogOutputArea.renderModel [as _setOutput] (src/widget.ts:571:21) at _setOutput (src/widget.ts:297:20) at invokeSlot (../../node_modules/@lumino/signaling/src/index.ts:716:12) at Object.emit (../../node_modules/@lumino/signaling/src/index.ts:638:9) at Signal.emit (../../node_modules/@lumino/signaling/src/index.ts:189:13) at ObservableString.emit [as insert] (../observables/src/observablestring.ts:174:19) at Object.insert [as addText] (src/model.ts:630:19) at OutputAreaModel.addText [as _add] (src/model.ts:361:35) at OutputAreaModel._add [as fromJSON] (src/model.ts:320:12) at Object.<anonymous> (test/widget.spec.ts:294:22)