/// Test array creation, indexing, iteration, and mutation

#[test]

fn test_array_literal_sum() {

let arr: [u256; 5] = [10, 20, 30, 40, 50]

let mut sum: u256 = 0

for x in arr {

sum += x

}

assert!(sum == 150)

}

#[test]

fn test_array_index() {

let arr: [u256; 4] = [100, 200, 300, 400]

assert!(arr[0] == 100)

assert!(arr[1] == 200)

assert!(arr[2] == 300)

assert!(arr[3] == 400)

}

#[test]

fn test_array_mut() {

let mut arr: [u256; 3] = [1, 2, 3]

arr[1] = 99

assert!(arr[0] == 1)

assert!(arr[1] == 99)

assert!(arr[2] == 3)

}

#[test]

fn test_multiple_arrays() {

let a: [u256; 3] = [1, 2, 3]

let b: [u256; 3] = [10, 20, 30]

let mut sum: u256 = 0

for x in a {

sum += x

}

for x in b {

sum += x

}

assert!(sum == 66)

}

#[test]

fn test_u8_array_mut() {

let mut arr: [u8; 4] = [1, 2, 3, 4]

arr[1] = 9

assert!(arr[0] == 1)

assert!(arr[1] == 9)

assert!(arr[2] == 3)

assert!(arr[3] == 4)

}

#[test]

fn test_bool_array_mut() {

let mut arr: [bool; 4] = [true, false, true, false]

arr[1] = true

arr[2] = false

assert!(arr[0] == true)

assert!(arr[1] == true)

assert!(arr[2] == false)

assert!(arr[3] == false)

}