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// Copyright 2015 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.

package rpc

import (
    "encoding/json"
    "testing"

    "github.com/tangerine-network/go-tangerine/common/math"
)

func TestBlockNumberJSONUnmarshal(t *testing.T) {
    tests := []struct {
        input    string
        mustFail bool
        expected BlockNumber
    }{
        0:  {`"0x"`, true, BlockNumber(0)},
        1:  {`"0x0"`, false, BlockNumber(0)},
        2:  {`"0X1"`, false, BlockNumber(1)},
        3:  {`"0x00"`, true, BlockNumber(0)},
        4:  {`"0x01"`, true, BlockNumber(0)},
        5:  {`"0x1"`, false, BlockNumber(1)},
        6:  {`"0x12"`, false, BlockNumber(18)},
        7:  {`"0x7fffffffffffffff"`, false, BlockNumber(math.MaxInt64)},
        8:  {`"0x8000000000000000"`, true, BlockNumber(0)},
        9:  {"0", true, BlockNumber(0)},
        10: {`"ff"`, true, BlockNumber(0)},
        11: {`"pending"`, false, PendingBlockNumber},
        12: {`"latest"`, false, LatestBlockNumber},
        13: {`"earliest"`, false, EarliestBlockNumber},
        14: {`someString`, true, BlockNumber(0)},
        15: {`""`, true, BlockNumber(0)},
        16: {``, true, BlockNumber(0)},
    }

    for i, test := range tests {
        var num BlockNumber
        err := json.Unmarshal([]byte(test.input), &num)
        if test.mustFail && err == nil {
            t.Errorf("Test %d should fail", i)
            continue
        }
        if !test.mustFail && err != nil {
            t.Errorf("Test %d should pass but got err: %v", i, err)
            continue
        }
        if num != test.expected {
            t.Errorf("Test %d got unexpected value, want %d, got %d", i, test.expected, num)
        }
    }
}