test: add test for updateFileSettings.effect

#2318

visualization/app/codeCharta/state/effects/updateFileSettings/updateFileSettings.effect.spec.ts

@@ -0,0 +1,51 @@
+import { ApplicationInitStatus } from "@angular/core"
+import { TestBed } from "@angular/core/testing"
+import { Action } from "redux"
+import { Subject } from "rxjs"
+
+import { EffectsModule } from "../../angular-redux/effects/effects.module"
+import { State } from "../../angular-redux/state"
+import { setFiles } from "../../store/files/files.actions"
+import { setState } from "../../store/state.actions"
+import { Store } from "../../store/store"
+import { UpdateFileSettingsEffect } from "./updateFileSettings.effect"
+
+describe("UpdateFileSettingsEffect", () => {
+	const mockedDialog = { open: jest.fn() }
+	let storeDispatchSpy
+
+	beforeEach(async () => {
+		storeDispatchSpy = jest.spyOn(Store, "dispatch")
+		mockedDialog.open = jest.fn()
+
+		EffectsModule.actions$ = new Subject<Action>()
+		TestBed.configureTestingModule({
+			imports: [EffectsModule.forRoot([UpdateFileSettingsEffect])],
+			providers: [{ provide: State, useValue: { getValue: () => ({ files: [] }) } }]
+		})
+		await TestBed.inject(ApplicationInitStatus).donePromise
+	})
+
+	afterEach(() => {
+		EffectsModule.actions$.complete()
+	})
+
+	it("should ignore a not relevant action", () => {
+		EffectsModule.actions$.next({ type: "whatever" })
+		expect(storeDispatchSpy).not.toHaveBeenCalled()
+	})
+
+	it("should not blacklist items if it would lead to an empty map but show error dialog", () => {
+		EffectsModule.actions$.next(setFiles([]))
+		expect(storeDispatchSpy).not.toHaveBeenCalledWith(
+			setState({
+				fileSettings: {
+					edges: [],
+					markedPackages: [],
+					blacklist: [],
+					attributeTypes: {}
+				}
+			})
+		)
+	})
+})