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This library, like Ruby'svcr, serializes the results once executed and saves them as a file. You can easily write tests to verify that the code outputs the same results as in the past, even after modifying the code.

go get github.com/juntaki/fix

Append code like below to your tests. and Run test twice.

err := fix.Fix(&output) // output is dumped to a file.if err != nil {  t.Fatal(err)}

First test will fail, because juntaki/fix writes serialized data to file.From the second time, the test will pass, if output is the same as first output.