1// Copyright 2021 The go-ethereum Authors
2// This file is part of the go-ethereum library.
3//
4// The go-ethereum library is free software: you can redistribute it and/or modify
5// it under the terms of the GNU Lesser General Public License as published by
6// the Free Software Foundation, either version 3 of the License, or
7// (at your option) any later version.
8//
9// The go-ethereum library is distributed in the hope that it will be useful,
10// but WITHOUT ANY WARRANTY; without even the implied warranty of
11// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12// GNU Lesser General Public License for more details.
13//
14// You should have received a copy of the GNU Lesser General Public License
15// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
16
17package gasprice
18
19import (
20	"context"
21	"errors"
22	"math/big"
23	"testing"
24
25	"github.com/ethereum/go-ethereum/rpc"
26)
27
28func TestFeeHistory(t *testing.T) {
29	var cases = []struct {
30		pending             bool
31		maxHeader, maxBlock int
32		count               int
33		last                rpc.BlockNumber
34		percent             []float64
35		expFirst            uint64
36		expCount            int
37		expErr              error
38	}{
39		{false, 1000, 1000, 10, 30, nil, 21, 10, nil},
40		{false, 1000, 1000, 10, 30, []float64{0, 10}, 21, 10, nil},
41		{false, 1000, 1000, 10, 30, []float64{20, 10}, 0, 0, errInvalidPercentile},
42		{false, 1000, 1000, 1000000000, 30, nil, 0, 31, nil},
43		{false, 1000, 1000, 1000000000, rpc.LatestBlockNumber, nil, 0, 33, nil},
44		{false, 1000, 1000, 10, 40, nil, 0, 0, errRequestBeyondHead},
45		{true, 1000, 1000, 10, 40, nil, 0, 0, errRequestBeyondHead},
46		{false, 20, 2, 100, rpc.LatestBlockNumber, nil, 13, 20, nil},
47		{false, 20, 2, 100, rpc.LatestBlockNumber, []float64{0, 10}, 31, 2, nil},
48		{false, 20, 2, 100, 32, []float64{0, 10}, 31, 2, nil},
49		{false, 1000, 1000, 1, rpc.PendingBlockNumber, nil, 0, 0, nil},
50		{false, 1000, 1000, 2, rpc.PendingBlockNumber, nil, 32, 1, nil},
51		{true, 1000, 1000, 2, rpc.PendingBlockNumber, nil, 32, 2, nil},
52		{true, 1000, 1000, 2, rpc.PendingBlockNumber, []float64{0, 10}, 32, 2, nil},
53	}
54	for i, c := range cases {
55		config := Config{
56			MaxHeaderHistory: c.maxHeader,
57			MaxBlockHistory:  c.maxBlock,
58		}
59		backend := newTestBackend(t, big.NewInt(16), c.pending)
60		oracle := NewOracle(backend, config)
61
62		first, reward, baseFee, ratio, err := oracle.FeeHistory(context.Background(), c.count, c.last, c.percent)
63
64		expReward := c.expCount
65		if len(c.percent) == 0 {
66			expReward = 0
67		}
68		expBaseFee := c.expCount
69		if expBaseFee != 0 {
70			expBaseFee++
71		}
72
73		if first.Uint64() != c.expFirst {
74			t.Fatalf("Test case %d: first block mismatch, want %d, got %d", i, c.expFirst, first)
75		}
76		if len(reward) != expReward {
77			t.Fatalf("Test case %d: reward array length mismatch, want %d, got %d", i, expReward, len(reward))
78		}
79		if len(baseFee) != expBaseFee {
80			t.Fatalf("Test case %d: baseFee array length mismatch, want %d, got %d", i, expBaseFee, len(baseFee))
81		}
82		if len(ratio) != c.expCount {
83			t.Fatalf("Test case %d: gasUsedRatio array length mismatch, want %d, got %d", i, c.expCount, len(ratio))
84		}
85		if err != c.expErr && !errors.Is(err, c.expErr) {
86			t.Fatalf("Test case %d: error mismatch, want %v, got %v", i, c.expErr, err)
87		}
88	}
89}
90