first commit

libs/web/tracker/application/src/lib/stores/board.reducers.spec.ts

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+import {
+  BoardColumn,
+  IssueStatus,
+  IssueSummary,
+} from '@task-stream/web/tracker/domain';
+import { applyIssueChange, moveIssue } from './board.reducers';
+
+const issue = (
+  id: string,
+  status: IssueStatus,
+  version = 1,
+  assignee: string | null = null,
+): IssueSummary =>
+  ({
+    id,
+    status,
+    version,
+    key: id,
+    projectId: 'p',
+    title: id,
+    assignee: assignee ? { id: assignee, name: assignee } : null,
+    release: null,
+    area: null,
+    labels: [],
+    commentCount: 0,
+  }) as unknown as IssueSummary;
+
+const board = (): BoardColumn[] => [
+  {
+    status: IssueStatus.TODO,
+    total: 1,
+    issues: [issue('a', IssueStatus.TODO)],
+  },
+  { status: IssueStatus.IN_PROGRESS, total: 0, issues: [] },
+];
+
+describe('board reducers', () => {
+  it('moves a card optimistically', () => {
+    const next = moveIssue(board(), 'a', IssueStatus.IN_PROGRESS);
+    expect(next[0]).toMatchObject({ total: 0, issues: [] });
+    expect(next[1].issues[0]).toMatchObject({
+      id: 'a',
+      status: IssueStatus.IN_PROGRESS,
+    });
+    expect(next[1].total).toBe(1);
+  });
+
+  it('applies newer realtime versions and ignores stale ones', () => {
+    const moved = applyIssueChange(
+      board(),
+      issue('a', IssueStatus.IN_PROGRESS, 2),
+      null,
+    );
+    expect(moved[1].issues.map((i) => i.id)).toEqual(['a']);
+
+    const stale = applyIssueChange(
+      moved,
+      issue('a', IssueStatus.TODO, 1),
+      null,
+    );
+    expect(stale).toBe(moved);
+  });
+
+  it('drops issues that no longer match the filter', () => {
+    const next = applyIssueChange(
+      board(),
+      issue('a', IssueStatus.TODO, 2, 'bob'),
+      { projectId: 'p', assigneeId: 'ana' },
+    );
+    expect(next[0].issues).toEqual([]);
+  });
+
+  it('adds new issues from other users', () => {
+    const next = applyIssueChange(
+      board(),
+      issue('b', IssueStatus.TODO, 1),
+      null,
+    );
+    expect(next[0].issues.map((i) => i.id)).toEqual(['b', 'a']);
+  });
+});