add more unit test to react redux

[zenz34]

------------------------------|---------|----------|---------|---------|-------------------

File	% Stmts	% Branch	% Funcs	% Lines	Uncovered Line #s
All files	97.71	98.11	71.43	98.26
xarc-react-redux	0	100	100	0
.eslintrc.js	0	100	100	0	1-2
xarc-react-redux/src/browser	100	100	100	100
index.tsx	100	100	100	100
xarc-react-redux/src/common	99.21	98.11	71.43	100
index.tsx	100	95.83	52.63	100	168
redux-shared-store.ts	98.57	100	93.75	100
xarc-react-redux/src/node	0	0	0	0
index.ts	0	0	0	0
------------------------------	---------	----------	---------	---------	-------------------

=============================== Coverage summary ===============================
Statements : 97.71% ( 128/131 )
Branches : 98.11% ( 52/53 )
Functions : 71.43% ( 25/35 )
Lines : 98.26% ( 113/115 )

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