Merge pull request #771 from cosmos/cwgoes/staking-tests-v2
Simplified multi-candidate staking pool tests
This commit is contained in:
commit
0c9ba2ba99
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@ -60,7 +60,7 @@ func (p Pool) addTokensBonded(amount int64) (p2 Pool, issuedShares sdk.Rat) {
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func (p Pool) removeSharesBonded(shares sdk.Rat) (p2 Pool, removedTokens int64) {
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removedTokens = p.bondedShareExRate().Mul(shares).Evaluate() // (tokens/shares) * shares
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p.BondedShares = p.BondedShares.Sub(shares)
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p.BondedPool -= removedTokens
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p.BondedPool = p.BondedPool - removedTokens
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return p, removedTokens
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}
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@ -4,7 +4,6 @@ import (
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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/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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@ -12,6 +11,48 @@ import (
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sdk "github.com/cosmos/cosmos-sdk/types"
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)
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func TestBondedRatio(t *testing.T) {
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ctx, _, keeper := createTestInput(t, nil, false, 0)
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pool := keeper.GetPool(ctx)
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pool.TotalSupply = 3
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pool.BondedPool = 2
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// bonded pool / total supply
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require.Equal(t, pool.bondedRatio(), sdk.NewRat(2).Quo(sdk.NewRat(3)))
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pool.TotalSupply = 0
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// avoids divide-by-zero
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require.Equal(t, pool.bondedRatio(), sdk.ZeroRat)
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}
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func TestBondedShareExRate(t *testing.T) {
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ctx, _, keeper := createTestInput(t, nil, false, 0)
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pool := keeper.GetPool(ctx)
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pool.BondedPool = 3
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pool.BondedShares = sdk.NewRat(10)
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// bonded pool / bonded shares
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require.Equal(t, pool.bondedShareExRate(), sdk.NewRat(3).Quo(sdk.NewRat(10)))
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pool.BondedShares = sdk.ZeroRat
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// avoids divide-by-zero
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require.Equal(t, pool.bondedShareExRate(), sdk.OneRat)
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}
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func TestUnbondedShareExRate(t *testing.T) {
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ctx, _, keeper := createTestInput(t, nil, false, 0)
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pool := keeper.GetPool(ctx)
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pool.UnbondedPool = 3
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pool.UnbondedShares = sdk.NewRat(10)
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// unbonded pool / unbonded shares
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require.Equal(t, pool.unbondedShareExRate(), sdk.NewRat(3).Quo(sdk.NewRat(10)))
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pool.UnbondedShares = sdk.ZeroRat
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// avoids divide-by-zero
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require.Equal(t, pool.unbondedShareExRate(), sdk.OneRat)
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}
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func TestBondedToUnbondedPool(t *testing.T) {
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ctx, _, keeper := createTestInput(t, nil, false, 0)
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@ -97,6 +138,7 @@ func TestRemoveSharesBonded(t *testing.T) {
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// same number of bonded shares / tokens when exchange rate is one
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assert.Equal(t, poolB.BondedShares, sdk.NewRat(poolB.BondedPool))
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}
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func TestAddTokensUnbonded(t *testing.T) {
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@ -181,6 +223,35 @@ func TestCandidateRemoveShares(t *testing.T) {
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assert.Equal(t, candB.Assets, candA.Assets.Sub(sdk.NewRat(10).Mul(candA.delegatorShareExRate())))
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// conservation of tokens
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assert.Equal(t, poolB.UnbondedPool+poolB.BondedPool+coinsB, poolA.UnbondedPool+poolA.BondedPool)
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// specific case from random tests
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assets := sdk.NewRat(5102)
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liabilities := sdk.NewRat(115)
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cand := Candidate{
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Status: Bonded,
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Address: addrs[0],
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PubKey: pks[0],
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Assets: assets,
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Liabilities: liabilities,
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}
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pool := Pool{
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TotalSupply: 0,
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BondedShares: sdk.NewRat(248305),
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UnbondedShares: sdk.NewRat(232147),
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BondedPool: 248305,
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UnbondedPool: 232147,
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InflationLastTime: 0,
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Inflation: sdk.NewRat(7, 100),
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}
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shares := sdk.NewRat(29)
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msg := fmt.Sprintf("candidate %s (status: %d, assets: %v, liabilities: %v, delegatorShareExRate: %v)",
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cand.Address, cand.Status, cand.Assets, cand.Liabilities, cand.delegatorShareExRate())
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msg = fmt.Sprintf("Removed %v shares from %s", shares, msg)
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newPool, _, tokens := pool.candidateRemoveShares(cand, shares)
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require.Equal(t,
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tokens+newPool.UnbondedPool+newPool.BondedPool,
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pool.BondedPool+pool.UnbondedPool,
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"Tokens were not conserved: %s", msg)
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}
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/////////////////////////////////////
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@ -206,7 +277,7 @@ func randomCandidate(r *rand.Rand) Candidate {
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}
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// generate a random staking state
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func randomSetup(r *rand.Rand) (Pool, Candidate) {
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func randomSetup(r *rand.Rand, numCandidates int) (Pool, Candidates) {
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pool := Pool{
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TotalSupply: 0,
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BondedShares: sdk.ZeroRat,
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@ -217,75 +288,75 @@ func randomSetup(r *rand.Rand) (Pool, Candidate) {
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Inflation: sdk.NewRat(7, 100),
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}
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candidates := make([]Candidate, numCandidates)
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for i := 0; i < numCandidates; i++ {
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candidate := randomCandidate(r)
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if candidate.Status == Bonded {
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pool.BondedShares = pool.BondedShares.Add(candidate.Assets)
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pool.BondedPool += candidate.Assets.Evaluate()
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} else {
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} else if candidate.Status == Unbonded {
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pool.UnbondedShares = pool.UnbondedShares.Add(candidate.Assets)
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pool.UnbondedPool += candidate.Assets.Evaluate()
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}
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return pool, candidate
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candidates[i] = candidate
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}
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return pool, candidates
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}
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func randomTokens(r *rand.Rand) int64 {
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return int64(r.Int31n(10000))
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// any operation that transforms staking state
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// takes in RNG instance, pool, candidate
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// returns updated pool, updated candidate, delta tokens, descriptive message
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type Operation func(r *rand.Rand, p Pool, c Candidate) (Pool, Candidate, int64, string)
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// operation: bond or unbond a candidate depending on current status
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func OpBondOrUnbond(r *rand.Rand, p Pool, cand Candidate) (Pool, Candidate, int64, string) {
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var msg string
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if cand.Status == Bonded {
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msg = fmt.Sprintf("Unbonded previously bonded candidate %s (assets: %v, liabilities: %v, delegatorShareExRate: %v)",
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cand.Address, cand.Assets, cand.Liabilities, cand.delegatorShareExRate())
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p, cand = p.bondedToUnbondedPool(cand)
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} else if cand.Status == Unbonded {
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msg = fmt.Sprintf("Bonded previously unbonded candidate %s (assets: %v, liabilities: %v, delegatorShareExRate: %v)",
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cand.Address, cand.Assets, cand.Liabilities, cand.delegatorShareExRate())
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p, cand = p.unbondedToBondedPool(cand)
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}
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return p, cand, 0, msg
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}
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// operation that transforms staking state
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type Operation func(p Pool, c Candidate) (Pool, Candidate, int64, string)
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// operation: add a random number of tokens to a candidate
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func OpAddTokens(r *rand.Rand, p Pool, cand Candidate) (Pool, Candidate, int64, string) {
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tokens := int64(r.Int31n(1000))
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msg := fmt.Sprintf("candidate %s (status: %d, assets: %v, liabilities: %v, delegatorShareExRate: %v)",
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cand.Address, cand.Status, cand.Assets, cand.Liabilities, cand.delegatorShareExRate())
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p, cand, _ = p.candidateAddTokens(cand, tokens)
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msg = fmt.Sprintf("Added %d tokens to %s", tokens, msg)
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return p, cand, -1 * tokens, msg // tokens are removed so for accounting must be negative
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}
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// operation: remove a random number of shares from a candidate
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func OpRemoveShares(r *rand.Rand, p Pool, cand Candidate) (Pool, Candidate, int64, string) {
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var shares sdk.Rat
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for {
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shares = sdk.NewRat(int64(r.Int31n(1000)))
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if shares.LT(cand.Liabilities) {
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break
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}
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}
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msg := fmt.Sprintf("Removed %v shares from candidate %s (status: %d, assets: %v, liabilities: %v, delegatorShareExRate: %v)",
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shares, cand.Address, cand.Status, cand.Assets, cand.Liabilities, cand.delegatorShareExRate())
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p, cand, tokens := p.candidateRemoveShares(cand, shares)
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return p, cand, tokens, msg
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}
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// pick a random staking operation
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func randomOperation(r *rand.Rand) Operation {
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operations := []Operation{
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// bond/unbond
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func(p Pool, cand Candidate) (Pool, Candidate, int64, string) {
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var msg string
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if cand.Status == Bonded {
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msg = fmt.Sprintf("Unbonded previously bonded candidate %s (assets: %d, liabilities: %d, delegatorShareExRate: %v)",
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cand.Address, cand.Assets.Evaluate(), cand.Liabilities.Evaluate(), cand.delegatorShareExRate())
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p, cand = p.bondedToUnbondedPool(cand)
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} else {
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msg = fmt.Sprintf("Bonded previously unbonded candidate %s (assets: %d, liabilities: %d, delegatorShareExRate: %v)",
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cand.Address, cand.Assets.Evaluate(), cand.Liabilities.Evaluate(), cand.delegatorShareExRate())
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p, cand = p.unbondedToBondedPool(cand)
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}
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return p, cand, 0, msg
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},
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// add some tokens to a candidate
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func(p Pool, cand Candidate) (Pool, Candidate, int64, string) {
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tokens := int64(r.Int31n(1000))
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msg := fmt.Sprintf("candidate %s (assets: %d, liabilities: %d, delegatorShareExRate: %v)",
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cand.Address, cand.Assets.Evaluate(), cand.Liabilities.Evaluate(), cand.delegatorShareExRate())
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p, cand, _ = p.candidateAddTokens(cand, tokens)
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msg = fmt.Sprintf("Added %d tokens to %s", tokens, msg)
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return p, cand, -1 * tokens, msg // tokens are removed so for accounting must be negative
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},
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// remove some shares from a candidate
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func(p Pool, cand Candidate) (Pool, Candidate, int64, string) {
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shares := sdk.NewRat(int64(r.Int31n(1000)))
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if shares.GT(cand.Liabilities) {
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shares = cand.Liabilities.Quo(sdk.NewRat(2))
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}
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msg := fmt.Sprintf("candidate %s (assets: %d, liabilities: %d, delegatorShareExRate: %v)",
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cand.Address, cand.Assets.Evaluate(), cand.Liabilities.Evaluate(), cand.delegatorShareExRate())
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p, cand, tokens := p.candidateRemoveShares(cand, shares)
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msg = fmt.Sprintf("Removed %d shares from %s", shares.Evaluate(), msg)
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return p, cand, tokens, msg
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},
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OpBondOrUnbond,
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OpAddTokens,
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OpRemoveShares,
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}
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r.Shuffle(len(operations), func(i, j int) {
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operations[i], operations[j] = operations[j], operations[i]
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@ -295,80 +366,168 @@ func randomOperation(r *rand.Rand) Operation {
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// ensure invariants that should always be true are true
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func assertInvariants(t *testing.T, msg string,
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pOrig Pool, cOrig Candidate, pMod Pool, cMod Candidate, tokens int64) {
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pOrig Pool, cOrig Candidates, pMod Pool, cMods Candidates, tokens int64) {
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// total tokens conserved
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require.Equal(t,
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pOrig.UnbondedPool+pOrig.BondedPool,
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pMod.UnbondedPool+pMod.BondedPool+tokens,
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"msg: %v\n, pOrig.UnbondedPool: %v, pOrig.BondedPool: %v, pMod.UnbondedPool: %v, pMod.BondedPool: %v, tokens: %v\n",
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"Tokens not conserved - msg: %v\n, pOrig.BondedShares: %v, pOrig.UnbondedShares: %v, pMod.BondedShares: %v, pMod.UnbondedShares: %v, pOrig.UnbondedPool: %v, pOrig.BondedPool: %v, pMod.UnbondedPool: %v, pMod.BondedPool: %v, tokens: %v\n",
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msg,
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pOrig.BondedShares, pOrig.UnbondedShares,
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pMod.BondedShares, pMod.UnbondedShares,
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pOrig.UnbondedPool, pOrig.BondedPool,
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pMod.UnbondedPool, pMod.BondedPool, tokens)
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// nonnegative shares
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// nonnegative bonded shares
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require.False(t, pMod.BondedShares.LT(sdk.ZeroRat),
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"msg: %v\n, pOrig: %v\n, pMod: %v\n, cOrig: %v\n, cMod %v, tokens: %v\n",
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msg, pOrig, pMod, cOrig, cMod, tokens)
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require.False(t, pMod.UnbondedShares.LT(sdk.ZeroRat),
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"msg: %v\n, pOrig: %v\n, pMod: %v\n, cOrig: %v\n, cMod %v, tokens: %v\n",
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msg, pOrig, pMod, cOrig, cMod, tokens)
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"Negative bonded shares - msg: %v\npOrig: %#v\npMod: %#v\ntokens: %v\n",
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msg, pOrig, pMod, tokens)
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// nonnegative ex rates
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// nonnegative unbonded shares
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require.False(t, pMod.UnbondedShares.LT(sdk.ZeroRat),
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"Negative unbonded shares - msg: %v\npOrig: %#v\npMod: %#v\ntokens: %v\n",
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msg, pOrig, pMod, tokens)
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// nonnegative bonded ex rate
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require.False(t, pMod.bondedShareExRate().LT(sdk.ZeroRat),
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"Applying operation \"%s\" resulted in negative bondedShareExRate: %d",
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msg, pMod.bondedShareExRate().Evaluate())
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// nonnegative unbonded ex rate
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require.False(t, pMod.unbondedShareExRate().LT(sdk.ZeroRat),
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"Applying operation \"%s\" resulted in negative unbondedShareExRate: %d",
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msg, pMod.unbondedShareExRate().Evaluate())
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for _, cMod := range cMods {
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// nonnegative ex rate
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require.False(t, cMod.delegatorShareExRate().LT(sdk.ZeroRat),
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"Applying operation \"%s\" resulted in negative candidate.delegatorShareExRate(): %v (candidate.PubKey: %s)",
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"Applying operation \"%s\" resulted in negative candidate.delegatorShareExRate(): %v (candidate.Address: %s)",
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msg,
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cMod.delegatorShareExRate(),
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cMod.PubKey,
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cMod.Address,
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)
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// nonnegative assets / liabilities
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// nonnegative assets
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require.False(t, cMod.Assets.LT(sdk.ZeroRat),
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"Applying operation \"%s\" resulted in negative candidate.Assets: %d (candidate.Liabilities: %d, candidate.PubKey: %s)",
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"Applying operation \"%s\" resulted in negative candidate.Assets: %v (candidate.Liabilities: %v, candidate.delegatorShareExRate: %v, candidate.Address: %s)",
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msg,
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cMod.Assets.Evaluate(),
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cMod.Liabilities.Evaluate(),
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cMod.PubKey,
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cMod.Assets,
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cMod.Liabilities,
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cMod.delegatorShareExRate(),
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cMod.Address,
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)
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// nonnegative liabilities
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require.False(t, cMod.Liabilities.LT(sdk.ZeroRat),
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"Applying operation \"%s\" resulted in negative candidate.Liabilities: %d (candidate.Assets: %d, candidate.PubKey: %s)",
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"Applying operation \"%s\" resulted in negative candidate.Liabilities: %v (candidate.Assets: %v, candidate.delegatorShareExRate: %v, candidate.Address: %s)",
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msg,
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cMod.Liabilities.Evaluate(),
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cMod.Assets.Evaluate(),
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cMod.PubKey,
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cMod.Liabilities,
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cMod.Assets,
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cMod.delegatorShareExRate(),
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cMod.Address,
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)
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}
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// run random operations in a random order on a random state, assert invariants hold
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func TestIntegrationInvariants(t *testing.T) {
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}
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// TODO Re-enable once the overflow bug is fixed!
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// ref https://github.com/cosmos/cosmos-sdk/issues/753
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/*
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func TestPossibleOverflow(t *testing.T) {
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assets := sdk.NewRat(2159)
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liabilities := sdk.NewRat(391432570689183511).Quo(sdk.NewRat(40113011844664))
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cand := Candidate{
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Status: Bonded,
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Address: addrs[0],
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PubKey: pks[0],
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Assets: assets,
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Liabilities: liabilities,
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}
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pool := Pool{
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TotalSupply: 0,
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BondedShares: assets,
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UnbondedShares: sdk.ZeroRat,
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BondedPool: assets.Evaluate(),
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UnbondedPool: 0,
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InflationLastTime: 0,
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Inflation: sdk.NewRat(7, 100),
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}
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tokens := int64(71)
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msg := fmt.Sprintf("candidate %s (status: %d, assets: %v, liabilities: %v, delegatorShareExRate: %v)",
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cand.Address, cand.Status, cand.Assets, cand.Liabilities, cand.delegatorShareExRate())
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_, newCandidate, _ := pool.candidateAddTokens(cand, tokens)
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msg = fmt.Sprintf("Added %d tokens to %s", tokens, msg)
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require.False(t, newCandidate.delegatorShareExRate().LT(sdk.ZeroRat),
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"Applying operation \"%s\" resulted in negative delegatorShareExRate(): %v",
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msg, newCandidate.delegatorShareExRate())
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}
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*/
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// run random operations in a random order on a random single-candidate state, assert invariants hold
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func TestSingleCandidateIntegrationInvariants(t *testing.T) {
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r := rand.New(rand.NewSource(41))
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for i := 0; i < 10; i++ {
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poolOrig, candidatesOrig := randomSetup(r, 1)
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require.Equal(t, 1, len(candidatesOrig))
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r1 := rand.New(rand.NewSource(time.Now().UnixNano()))
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pool, candidates := randomSetup(r1)
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initialPool, initialCandidates := pool, candidates
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// sanity check
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assertInvariants(t, "no operation",
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initialPool, initialCandidates,
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pool, candidates, 0)
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poolOrig, candidatesOrig,
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poolOrig, candidatesOrig, 0)
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|
||||
for j := 0; j < 100; j++ {
|
||||
// TODO Increase iteration count once overflow bug is fixed
|
||||
// ref https://github.com/cosmos/cosmos-sdk/issues/753
|
||||
for j := 0; j < 4; j++ {
|
||||
poolMod, candidateMod, tokens, msg := randomOperation(r)(r, poolOrig, candidatesOrig[0])
|
||||
|
||||
r2 := rand.New(rand.NewSource(time.Now().UnixNano()))
|
||||
pool, candidates, tokens, msg := randomOperation(r2)(pool, candidates)
|
||||
candidatesMod := make([]Candidate, len(candidatesOrig))
|
||||
copy(candidatesMod[:], candidatesOrig[:])
|
||||
require.Equal(t, 1, len(candidatesOrig), "j %v", j)
|
||||
require.Equal(t, 1, len(candidatesMod), "j %v", j)
|
||||
candidatesMod[0] = candidateMod
|
||||
|
||||
assertInvariants(t, msg,
|
||||
initialPool, initialCandidates,
|
||||
pool, candidates, tokens)
|
||||
poolOrig, candidatesOrig,
|
||||
poolMod, candidatesMod, tokens)
|
||||
|
||||
poolOrig = poolMod
|
||||
candidatesOrig = candidatesMod
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// run random operations in a random order on a random multi-candidate state, assert invariants hold
|
||||
func TestMultiCandidateIntegrationInvariants(t *testing.T) {
|
||||
r := rand.New(rand.NewSource(42))
|
||||
|
||||
for i := 0; i < 10; i++ {
|
||||
poolOrig, candidatesOrig := randomSetup(r, 100)
|
||||
|
||||
assertInvariants(t, "no operation",
|
||||
poolOrig, candidatesOrig,
|
||||
poolOrig, candidatesOrig, 0)
|
||||
|
||||
// TODO Increase iteration count once overflow bug is fixed
|
||||
// ref https://github.com/cosmos/cosmos-sdk/issues/753
|
||||
for j := 0; j < 3; j++ {
|
||||
index := int(r.Int31n(int32(len(candidatesOrig))))
|
||||
poolMod, candidateMod, tokens, msg := randomOperation(r)(r, poolOrig, candidatesOrig[index])
|
||||
candidatesMod := make([]Candidate, len(candidatesOrig))
|
||||
copy(candidatesMod[:], candidatesOrig[:])
|
||||
candidatesMod[index] = candidateMod
|
||||
|
||||
assertInvariants(t, msg,
|
||||
poolOrig, candidatesOrig,
|
||||
poolMod, candidatesMod, tokens)
|
||||
|
||||
poolOrig = poolMod
|
||||
candidatesOrig = candidatesMod
|
||||
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
|
@ -104,7 +104,7 @@ func (c Candidate) delegatorShareExRate() sdk.Rat {
|
|||
// Should only be called when the Candidate qualifies as a validator.
|
||||
func (c Candidate) validator() Validator {
|
||||
return Validator{
|
||||
Address: c.Address, // XXX !!!
|
||||
Address: c.Address,
|
||||
VotingPower: c.Assets,
|
||||
}
|
||||
}
|
||||
|
|
Loading…
Reference in New Issue