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I had the same issue for that tutorial looks like once the test is ran it adds an import for react-bootstrap/lib/Breadcrumb. I just removed the import and reran the test and it worked.


The metamask.js script seems incorrect. There isn't enough code to test but you have to do something like this const oldProvider = web3.currentProvider; // keep a reference to metamask provider myWeb3 = new Web3(oldProvider); // now you can use myWeb3 instead of web3 If the project is large you may want to replace web3 with myWeb3. global.web3 = myWeb3

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