Moved RandVal into test helper functions, as needed in other repos for testing

example/dummy/helpers.go

@@ -0,0 +1,34 @@
+package dummy
+
+import (
+	"github.com/tendermint/abci/types"
+	crypto "github.com/tendermint/go-crypto"
+	cmn "github.com/tendermint/tmlibs/common"
+)
+
+// RandVal creates one random validator, with a key derived
+// from the input value
+func RandVal(i int) *types.Validator {
+	pubkey := crypto.GenPrivKeyEd25519FromSecret([]byte(cmn.Fmt("test%d", i))).PubKey().Bytes()
+	power := cmn.RandUint16() + 1
+	return &types.Validator{pubkey, uint64(power)}
+}
+
+// RandVals returns a list of cnt validators for initializing
+// the application. Note that the keys are deterministically
+// derived from the index in the array, while the power is
+// random (Change this if not desired)
+func RandVals(cnt int) []*types.Validator {
+	res := make([]*types.Validator, cnt)
+	for i := 0; i < cnt; i++ {
+		res[i] = RandVal(i)
+	}
+	return res
+}
+
+// InitDummy initializes the dummy app with some data,
+// which allows tests to pass and is fine as long as you
+// don't make any tx that modify the validator state
+func InitDummy(app *PersistentDummyApplication) {
+	app.InitChain(types.RequestInitChain{RandVals(1)})
+}