diff -r 1f340f3597a8 -r ea92f4fe783d client/src/reducers/__tests__/sessionsReducer.test.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/client/src/reducers/__tests__/sessionsReducer.test.js	Mon Oct 08 18:35:47 2018 +0200
@@ -0,0 +1,338 @@
+import { sessions } from '../sessionsReducer';
+import SessionRecord from '../../store/sessionRecord';
+import * as types from '../../constants/actionTypes';
+import { ActionEnum } from '../../constants';
+
+
+describe('sessions reducer lastSync', () => {
+
+  it('should return the initial state', () => {
+    expect(
+      sessions(undefined, {})
+    ).toEqual([])
+  });
+
+  it('should handle types.CREATE_SESSION'  , () => {
+    const initialState = [
+      SessionRecord({ _id: 'session1', title: 'Session title 1' }),
+      SessionRecord({ _id: 'session2', title: 'Session title 2' }),
+      SessionRecord({ _id: 'session3', title: 'Session title 3' })
+    ];
+
+    expect(
+      sessions(initialState, {
+        type: types.CREATE_SESSION,
+        session: {
+          _id: 'session4',
+          title: 'Session title 4'
+        }
+      })
+    ).toEqual([
+      SessionRecord({ _id: 'session1', title: 'Session title 1' }),
+      SessionRecord({ _id: 'session2', title: 'Session title 2' }),
+      SessionRecord({ _id: 'session3', title: 'Session title 3' }),
+      SessionRecord({ _id: 'session4', title: 'Session title 4' })
+    ]);
+
+  });
+
+  it('should handle types.UPDATE_SESSION'  , () => {
+    const initialState = [
+      SessionRecord({ _id: 'session1', title: 'Session title 1' }),
+      SessionRecord({ _id: 'session2', title: 'Session title 2' }),
+      SessionRecord({ _id: 'session3', title: 'Session title 3' })
+    ];
+
+    expect(
+      sessions(initialState, {
+        type: types.UPDATE_SESSION,
+        sessionId: 'session2',
+        values: {
+          title: 'New session title 2'
+        }
+      })
+    ).toEqual([
+      SessionRecord({ _id: 'session1', title: 'Session title 1' }),
+      SessionRecord({ _id: 'session2', title: 'New session title 2', action: ActionEnum.UPDATED }),
+      SessionRecord({ _id: 'session3', title: 'Session title 3' })
+    ]);
+  });
+
+
+  it('should handle types.UPDATE_SESSION not found', () => {
+    const initialState = [
+      SessionRecord({ _id: 'session1', title: 'Session title 1' }),
+      SessionRecord({ _id: 'session2', title: 'Session title 2' }),
+      SessionRecord({ _id: 'session3', title: 'Session title 3' })
+    ];
+
+    expect(
+      sessions(initialState, {
+        type: types.UPDATE_SESSION,
+        sessionId: 'session0',
+        values: {
+          title: 'New session title 0'
+        }
+      })
+    ).toEqual([
+      SessionRecord({ _id: 'session1', title: 'Session title 1' }),
+      SessionRecord({ _id: 'session2', title: 'Session title 2' }),
+      SessionRecord({ _id: 'session3', title: 'Session title 3' })
+    ]);
+  });
+
+  it('should handle types.UPDATE_SESSION CREATED'  , () => {
+    const initialState = [
+      SessionRecord({ _id: 'session1', title: 'Session title 1' }),
+      SessionRecord({ _id: 'session2', title: 'Session title 2', action: ActionEnum.CREATED }),
+      SessionRecord({ _id: 'session3', title: 'Session title 3' })
+    ];
+
+    expect(
+      sessions(initialState, {
+        type: types.UPDATE_SESSION,
+        sessionId: 'session2',
+        values: {
+          title: 'New session title 2'
+        }
+      })
+    ).toEqual([
+      SessionRecord({ _id: 'session1', title: 'Session title 1' }),
+      SessionRecord({ _id: 'session2', title: 'New session title 2', action: ActionEnum.CREATED }),
+      SessionRecord({ _id: 'session3', title: 'Session title 3' })
+    ]);
+  });
+
+
+  it('should handle types.UPDATE_SESSION DELETED'  , () => {
+    const initialState = [
+      SessionRecord({ _id: 'session1', title: 'Session title 1' }),
+      SessionRecord({ _id: 'session2', title: 'Session title 2', action: ActionEnum.DELETED }),
+      SessionRecord({ _id: 'session3', title: 'Session title 3' })
+    ];
+
+    expect(
+      sessions(initialState, {
+        type: types.UPDATE_SESSION,
+        sessionId: 'session2',
+        values: {
+          title: 'New session title 2'
+        }
+      })
+    ).toEqual([
+      SessionRecord({ _id: 'session1', title: 'Session title 1' }),
+      SessionRecord({ _id: 'session2', title: 'New session title 2', action: ActionEnum.DELETED }),
+      SessionRecord({ _id: 'session3', title: 'Session title 3' })
+    ]);
+  });
+
+
+  it('should handle types.DO_DELETE_SESSION', () => {
+    const initialState = [
+      SessionRecord({ _id: 'session1', title: 'Session title 1' }),
+      SessionRecord({ _id: 'session2', title: 'Session title 2' }),
+      SessionRecord({ _id: 'session3', title: 'Session title 3' })
+    ];
+
+    expect(
+      sessions(initialState, {
+        type: types.DO_DELETE_SESSION,
+        sessionId: 'session2'
+      })
+    ).toEqual([
+      SessionRecord({ _id: 'session1', title: 'Session title 1' }),
+      SessionRecord({ _id: 'session3', title: 'Session title 3' })
+    ]);
+
+  });
+
+  it('should handle types.DO_DELETE_SESSION unknown', () => {
+    const initialState = [
+      SessionRecord({ _id: 'session1', title: 'Session title 1' }),
+      SessionRecord({ _id: 'session2', title: 'Session title 2' }),
+      SessionRecord({ _id: 'session3', title: 'Session title 3' })
+    ];
+
+    expect(
+      sessions(initialState, {
+        type: types.DO_DELETE_SESSION,
+        sessionId: 'session0'
+      })
+    ).toEqual([
+      SessionRecord({ _id: 'session1', title: 'Session title 1' }),
+      SessionRecord({ _id: 'session2', title: 'Session title 2' }),
+      SessionRecord({ _id: 'session3', title: 'Session title 3' })
+    ]);
+
+  });
+
+
+  it('should handle types.DELETE_SESSION'  , () => {
+    const initialState = [
+      SessionRecord({ _id: 'session1', title: 'Session title 1' }),
+      SessionRecord({ _id: 'session2', title: 'Session title 2' }),
+      SessionRecord({ _id: 'session3', title: 'Session title 3' })
+    ];
+
+    expect(
+      sessions(initialState, {
+        type: types.DELETE_SESSION,
+        sessionId: 'session2'
+      })
+    ).toEqual([
+      SessionRecord({ _id: 'session1', title: 'Session title 1' }),
+      SessionRecord({ _id: 'session2', title: 'Session title 2', action: ActionEnum.DELETED }),
+      SessionRecord({ _id: 'session3', title: 'Session title 3' })
+    ]);
+
+  });
+
+  it('should handle types.DELETE_SESSION unknown'  , () => {
+    const initialState = [
+      SessionRecord({ _id: 'session1', title: 'Session title 1' }),
+      SessionRecord({ _id: 'session2', title: 'Session title 2' }),
+      SessionRecord({ _id: 'session3', title: 'Session title 3' })
+    ];
+
+    expect(
+      sessions(initialState, {
+        type: types.DELETE_SESSION,
+        sessionId: 'session0'
+      })
+    ).toEqual([
+      SessionRecord({ _id: 'session1', title: 'Session title 1' }),
+      SessionRecord({ _id: 'session2', title: 'Session title 2' }),
+      SessionRecord({ _id: 'session3', title: 'Session title 3' })
+    ]);
+
+  });
+
+  it('should handle types.LOAD_SESSIONS'  , () => {
+    const initialState = [
+      SessionRecord({ _id: 'session1', title: 'Session title 1' }),
+      SessionRecord({ _id: 'session2', title: 'Session title 2' }),
+      SessionRecord({ _id: 'session3', title: 'Session title 3' })
+    ];
+
+    expect(
+      sessions(initialState, {
+        type: types.LOAD_SESSIONS,
+        sessions: [
+          SessionRecord({ _id: 'session1bis', title: 'Session title 1 bis' }),
+          SessionRecord({ _id: 'session2bis', title: 'Session title 2 bis' }),
+          SessionRecord({ _id: 'session3bis', title: 'Session title 3 bis' })
+        ]
+      })
+    ).toEqual([
+      SessionRecord({ _id: 'session1bis', title: 'Session title 1 bis' }),
+      SessionRecord({ _id: 'session2bis', title: 'Session title 2 bis' }),
+      SessionRecord({ _id: 'session3bis', title: 'Session title 3 bis' })
+    ]);
+
+  });
+
+  it('should handle types.LOAD_SESSION', () => {
+    const newSession = SessionRecord({ _id: 'session2', title: 'New session title 2' });
+    const initialState = [
+      SessionRecord({ _id: 'session1', title: 'Session title 1' }),
+      SessionRecord({ _id: 'session2', title: 'Session title 2' }),
+      SessionRecord({ _id: 'session3', title: 'Session title 3' })
+    ];
+
+    expect(
+      sessions(initialState, {
+        type: types.LOAD_SESSION,
+        session: newSession,
+      })
+    ).toEqual([
+      SessionRecord({ _id: 'session1', title: 'Session title 1' }),
+      SessionRecord({ _id: 'session2', title: 'New session title 2' }),
+      SessionRecord({ _id: 'session3', title: 'Session title 3' })
+    ]);
+
+  });
+
+  it('should handle types.LOAD_SESSION new', () => {
+    const newSession = SessionRecord({ _id: 'session0', title: 'Session title 0' });
+    const initialState = [
+      SessionRecord({ _id: 'session1', title: 'Session title 1' }),
+      SessionRecord({ _id: 'session2', title: 'Session title 2' }),
+      SessionRecord({ _id: 'session3', title: 'Session title 3' })
+    ];
+
+    expect(
+      sessions(initialState, {
+        type: types.LOAD_SESSION,
+        session: newSession,
+      })
+    ).toEqual([
+      SessionRecord({ _id: 'session1', title: 'Session title 1' }),
+      SessionRecord({ _id: 'session2', title: 'Session title 2' }),
+      SessionRecord({ _id: 'session3', title: 'Session title 3' }),
+      SessionRecord({ _id: 'session0', title: 'Session title 0' })
+    ]);
+
+  });
+
+
+  it('should handle types.SYNC_RESET_ALL'  , () => {
+    const initialState = [
+      SessionRecord({ _id: 'session1', title: 'Session title 1', action: ActionEnum.DELETED }),
+      SessionRecord({ _id: 'session2', title: 'Session title 2', action: ActionEnum.CREATED }),
+      SessionRecord({ _id: 'session3', title: 'Session title 3', action: ActionEnum.UPDATED }),
+      SessionRecord({ _id: 'session4', title: 'Session title 4', action: ActionEnum.NONE })
+    ];
+
+    expect(
+      sessions(initialState, {
+        type: types.SYNC_RESET_ALL
+      })
+    ).toEqual([
+      SessionRecord({ _id: 'session1', title: 'Session title 1', action: ActionEnum.NONE }),
+      SessionRecord({ _id: 'session2', title: 'Session title 2', action: ActionEnum.NONE }),
+      SessionRecord({ _id: 'session3', title: 'Session title 3', action: ActionEnum.NONE }),
+      SessionRecord({ _id: 'session4', title: 'Session title 4', action: ActionEnum.NONE })
+    ]);
+
+  });
+
+  it('should handle types.RESET_ACTION_SESSION', () => {
+    const initialState = [
+      SessionRecord({ _id: 'session1', title: 'Session title 1', action: ActionEnum.DELETED }),
+      SessionRecord({ _id: 'session2', title: 'Session title 2', action: ActionEnum.CREATED }),
+      SessionRecord({ _id: 'session3', title: 'Session title 3', action: ActionEnum.UPDATED }),
+      SessionRecord({ _id: 'session4', title: 'Session title 4', action: ActionEnum.NONE })
+    ];
+
+    expect(
+      sessions(initialState, {
+        type: types.RESET_ACTION_SESSION,
+        sessionId: 'session2'
+      })
+    ).toEqual([
+      SessionRecord({ _id: 'session1', title: 'Session title 1', action: ActionEnum.DELETED }),
+      SessionRecord({ _id: 'session2', title: 'Session title 2', action: ActionEnum.NONE }),
+      SessionRecord({ _id: 'session3', title: 'Session title 3', action: ActionEnum.UPDATED }),
+      SessionRecord({ _id: 'session4', title: 'Session title 4', action: ActionEnum.NONE })
+    ]);
+
+  });
+
+  it('should handle types.AUTH_LOGOUT', () => {
+    const initialState = [
+      SessionRecord({ _id: 'session1', title: 'Session title 1', action: ActionEnum.DELETED }),
+      SessionRecord({ _id: 'session2', title: 'Session title 2', action: ActionEnum.CREATED }),
+      SessionRecord({ _id: 'session3', title: 'Session title 3', action: ActionEnum.UPDATED }),
+      SessionRecord({ _id: 'session4', title: 'Session title 4', action: ActionEnum.NONE })
+    ];
+
+    expect(
+      sessions(initialState, {
+        type: types.AUTH_LOGOUT
+      })
+    ).toEqual([]);
+
+  });
+
+
+});