82 lines
2.4 KiB
Go
82 lines
2.4 KiB
Go
package simulation
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import (
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"encoding/json"
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"fmt"
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"math/rand"
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"testing"
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"time"
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"github.com/cosmos/cosmos-sdk/baseapp"
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sdk "github.com/cosmos/cosmos-sdk/types"
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"github.com/cosmos/cosmos-sdk/x/mock"
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"github.com/stretchr/testify/require"
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abci "github.com/tendermint/tendermint/abci/types"
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)
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// Simulate tests application by sending random messages.
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func Simulate(
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t *testing.T, app *baseapp.BaseApp, appStateFn func(r *rand.Rand, accs []sdk.AccAddress) json.RawMessage, ops []TestAndRunTx, setups []RandSetup,
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invariants []Invariant, numKeys int, numBlocks int, blockSize int,
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) {
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time := time.Now().UnixNano()
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SimulateFromSeed(t, app, appStateFn, time, ops, setups, invariants, numKeys, numBlocks, blockSize)
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}
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// SimulateFromSeed tests an application by running the provided
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// operations, testing the provided invariants, but using the provided seed.
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func SimulateFromSeed(
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t *testing.T, app *baseapp.BaseApp, appStateFn func(r *rand.Rand, accs []sdk.AccAddress) json.RawMessage, seed int64, ops []TestAndRunTx, setups []RandSetup,
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invariants []Invariant, numKeys int, numBlocks int, blockSize int,
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) {
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log := fmt.Sprintf("Starting SimulateFromSeed with randomness created with seed %d", int(seed))
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keys, addrs := mock.GeneratePrivKeyAddressPairs(numKeys)
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r := rand.New(rand.NewSource(seed))
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// Setup event stats
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events := make(map[string]uint)
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event := func(what string) {
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events[what] += 1
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}
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app.InitChain(abci.RequestInitChain{AppStateBytes: appStateFn(r, addrs)})
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for i := 0; i < len(setups); i++ {
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setups[i](r, keys)
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}
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app.Commit()
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header := abci.Header{Height: 0}
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for i := 0; i < numBlocks; i++ {
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app.BeginBlock(abci.RequestBeginBlock{})
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// Make sure invariants hold at beginning of block and when nothing was
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// done.
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AssertAllInvariants(t, app, invariants, log)
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ctx := app.NewContext(false, header)
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// TODO: Add modes to simulate "no load", "medium load", and
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// "high load" blocks.
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for j := 0; j < blockSize; j++ {
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logUpdate, err := ops[r.Intn(len(ops))](t, r, app, ctx, keys, log, event)
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log += "\n" + logUpdate
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require.Nil(t, err, log)
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AssertAllInvariants(t, app, invariants, log)
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}
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app.EndBlock(abci.RequestEndBlock{})
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header.Height++
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}
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DisplayEvents(events)
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}
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// AssertAllInvariants asserts a list of provided invariants against application state
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func AssertAllInvariants(t *testing.T, app *baseapp.BaseApp, tests []Invariant, log string) {
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for i := 0; i < len(tests); i++ {
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tests[i](t, app, log)
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}
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}
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