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safe-ios/Packages/Ethereum/Tests/SolidityTests/FixedArrayEncodingTests.swift
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//
// File.swift
//
//
// Created by Dmitry Bespalov on 03.01.22.
//
import Foundation
import Solidity
import XCTest
class FixedArrayEncodingTests: XCTestCase {
func testEncodeStaticFixedArray() {
// encoded as a tuple of k elements
// bytes3[2] = (bytes3, bytes3)
let value = Sol.FixedArray(size: 2, elements: [
Sol.Bytes3(storage: Data([0xaa, 0xbb, 0xcc])),
Sol.Bytes3(storage: Data([0x11, 0x22, 0x33]))
])
let expected = Data([
// 0 element
0xaa, 0xbb, 0xcc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 16 bytes
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 32 bytes
// 1 element
0x11, 0x22, 0x33, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 16 bytes
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 32 bytes
])
let data = value.encode()
XCTAssertEqual(Array(data), Array(expected))
}
func testDecodeStaticFixedArray() throws {
let data = Data([
// 0 element
0xaa, 0xbb, 0xcc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 16 bytes
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 32 bytes
// 1 element
0x11, 0x22, 0x33, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 16 bytes
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 32 bytes
])
var value = Sol.FixedArray(size: 2, repeating: Sol.Bytes3())
var offset = 0
try value.decode(from: data, offset: &offset)
continueAfterFailure = false
XCTAssertEqual(value.elements.count, 2)
XCTAssertEqual(Array(value.elements[0].storage), [0xaa, 0xbb, 0xcc])
XCTAssertEqual(Array(value.elements[1].storage), [0x11, 0x22, 0x33])
XCTAssertEqual(offset, 64)
}
func testEncodeDynamicFixedArray() {
// bytes[2] = encoded as (bytes, bytes)
// (bytes, bytes) encoded as
let value = Sol.FixedArray(size: 2, elements: [Sol.Bytes(storage: Data([0xaa])), Sol.Bytes(storage: Data([0xbb]))])
let expected = Data([
// head[0] = location of the 1st 'bytes' = heads size = 64 = 0x40
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 16 bytes
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, // 32 bytes
// head[1] = location of the 2nd 'bytes' = heads size + tail[0].size = 64 + 64 = 128 = 0x80
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 16 bytes
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, // 32 bytes
// tail[0] = uint256(size) pad_right(data) = 0x01 0xaa... (size = 32 + 32 = 64)
// size: uint256 = 0x01
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 16 bytes
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, // 32 bytes
// padded data: 0xaa...
0xaa, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 16 bytes
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 32 bytes
// tail[1] = uint256(size) pad_right(data) = 0x01 0xbb... (size = 32 + 32 = 64)
// size: uint256 = 0x01
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 16 bytes
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, // 32 bytes
// padded data: 0xbb ...
0xbb, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 16 bytes
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 32 bytes
])
let data = value.encode()
XCTAssertEqual(Array(data), Array(expected))
}
func testDecodeDynamicFixedArray() throws {
let data = Data([
// head[0] = location of the 1st 'bytes' = heads size = 64 = 0x40
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 16 bytes
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, // 32 bytes
// head[1] = location of the 2nd 'bytes' = heads size + tail[0].size = 64 + 64 = 128 = 0x80
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 16 bytes
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, // 32 bytes
// tail[0] = uint256(size) pad_right(data) = 0x01 0xaa... (size = 32 + 32 = 64)
// size: uint256 = 0x01
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 16 bytes
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, // 32 bytes
// padded data: 0xaa...
0xaa, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 16 bytes
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 32 bytes
// tail[1] = uint256(size) pad_right(data) = 0x01 0xbb... (size = 32 + 32 = 64)
// size: uint256 = 0x01
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 16 bytes
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, // 32 bytes
// padded data: 0xbb ...
0xbb, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 16 bytes
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 32 bytes
])
var value = Sol.FixedArray(size: 2, repeating: Sol.Bytes())
var offset = 0
try value.decode(from: data, offset: &offset)
continueAfterFailure = false
XCTAssertEqual(value.elements.count, 2)
XCTAssertEqual(Array(value.elements[0].storage), [0xaa])
XCTAssertEqual(Array(value.elements[1].storage), [0xbb])
XCTAssertEqual(offset, 192)
}
}
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