testing: Replace Ginkgo and Gomega with Testify

Some of the reasons to prefer native Go testing with Testify:
 - Ginkgo doesn't seem very convenient to use, e.g. running an
   arbitrary subset of tests
 - Ginkgo doesn't seem to have native integration with Go's benchmark
   or fuzz testing facilities

Signed-off-by: Sergey Fedorov <sergey.fedorov@protocol.ai>

Makefile

@@ -23,7 +23,7 @@ clean:
 
 .PHONY: test
 test:
-	go test -race
+	go test -race ./...
 
 .PHONY: lint
 lint:

go.mod

@@ -6,10 +6,9 @@ require (
 	github.com/AlecAivazis/survey/v2 v2.3.2
 	github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751 // indirect
 	github.com/alecthomas/units v0.0.0-20211218093645-b94a6e3cc137 // indirect
-	github.com/dgraph-io/badger/v2 v2.2007.2
-	github.com/onsi/ginkgo/v2 v2.1.4
-	github.com/onsi/gomega v1.19.0
+	github.com/otiai10/copy v1.7.0
 	github.com/pkg/errors v0.9.1
+	github.com/stretchr/testify v1.7.0
 	github.com/tidwall/gjson v1.14.1 // indirect
 	github.com/tidwall/wal v1.1.7
 	github.com/ttacon/chalk v0.0.0-20160626202418-22c06c80ed31
@@ -22,18 +21,11 @@ require (
 	gopkg.in/alecthomas/kingpin.v2 v2.2.6
 )
 
-require github.com/stretchr/testify v1.7.0
-
 require (
-	github.com/DataDog/zstd v1.4.1 // indirect
-	github.com/cespare/xxhash v1.1.0 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/dgraph-io/ristretto v0.0.3-0.20200630154024-f66de99634de // indirect
-	github.com/dgryski/go-farm v0.0.0-20190423205320-6a90982ecee2 // indirect
-	github.com/dustin/go-humanize v1.0.0 // indirect
 	github.com/golang/protobuf v1.5.2 // indirect
-	github.com/golang/snappy v0.0.1 // indirect
 	github.com/kballard/go-shellquote v0.0.0-20180428030007-95032a82bc51 // indirect
+	github.com/kr/pretty v0.1.0 // indirect
 	github.com/mattn/go-colorable v0.1.2 // indirect
 	github.com/mattn/go-isatty v0.0.8 // indirect
 	github.com/mgutz/ansi v0.0.0-20170206155736-9520e82c474b // indirect
@@ -43,6 +35,6 @@ require (
 	github.com/tidwall/tinylru v1.1.0 // indirect
 	golang.org/x/term v0.0.0-20210927222741-03fcf44c2211 // indirect
 	golang.org/x/text v0.3.7 // indirect
-	gopkg.in/yaml.v2 v2.4.0 // indirect
+	gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )