Move toolbar functions into redux reducer (#1763)

Signed-off-by: Tilman Vatteroth <git@tilmanvatteroth.de>

src/redux/note-details/reducers/build-state-from-selection-format.test.ts

@@ -0,0 +1,47 @@
+/*
+ * SPDX-FileCopyrightText: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import * as buildStateFromUpdatedMarkdownContentLinesModule from '../build-state-from-updated-markdown-content'
+import { Mock } from 'ts-mockery'
+import type { NoteDetails } from '../types/note-details'
+import * as applyFormatTypeToMarkdownLinesModule from '../format-selection/apply-format-type-to-markdown-lines'
+import { buildStateFromSelectionFormat } from './build-state-from-selection-format'
+import { initialState } from '../initial-state'
+import { FormatType } from '../types'
+import type { CursorSelection } from '../../editor/types'
+
+describe('build state from selection format', () => {
+  const buildStateFromUpdatedMarkdownContentLinesMock = jest.spyOn(
+    buildStateFromUpdatedMarkdownContentLinesModule,
+    'buildStateFromUpdatedMarkdownContentLines'
+  )
+  const mockedNoteDetails = Mock.of<NoteDetails>()
+  const applyFormatTypeToMarkdownLinesMock = jest.spyOn(
+    applyFormatTypeToMarkdownLinesModule,
+    'applyFormatTypeToMarkdownLines'
+  )
+  const mockedFormattedLines = ['formatted']
+
+  beforeAll(() => {
+    buildStateFromUpdatedMarkdownContentLinesMock.mockImplementation(() => mockedNoteDetails)
+    applyFormatTypeToMarkdownLinesMock.mockImplementation(() => mockedFormattedLines)
+  })
+
+  afterAll(() => {
+    buildStateFromUpdatedMarkdownContentLinesMock.mockReset()
+    applyFormatTypeToMarkdownLinesMock.mockReset()
+  })
+
+  it('builds a new state with the formatted code', () => {
+    const originalLines = ['original']
+    const customCursor = Mock.of<CursorSelection>()
+    const startState = { ...initialState, markdownContentLines: originalLines, selection: customCursor }
+    const result = buildStateFromSelectionFormat(startState, FormatType.BOLD)
+    expect(result).toBe(mockedNoteDetails)
+    expect(buildStateFromUpdatedMarkdownContentLinesMock).toHaveBeenCalledWith(startState, mockedFormattedLines)
+    expect(applyFormatTypeToMarkdownLinesMock).toHaveBeenCalledWith(originalLines, customCursor, FormatType.BOLD)
+  })
+})