v/vlib/builtin/array_test.v

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fn test_pointer() {
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mut arr := []&int{}
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a := 1
b := 2
c := 3
arr << &a
arr << &b
arr << &c
assert *arr[0] == 1
arr[1] = &c
assert *arr[1] == 3
mut d_arr := [arr] // [][]&int
d_arr << arr
assert *d_arr[0][1] == 3
println(*d_arr[0][1])
assert *d_arr[1][0] == 1
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}
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fn test_assign() {
mut arr := [2, 4, 8, 16, 32, 64, 128]
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arr[0] = 2
arr[1] &= 255
arr[2] |= 255
arr[3] <<= 4
arr[4] >>= 4
arr[5] %= 5
arr[6] ^= 3
assert arr[0] == 2
assert arr[1] == 4 & 255
assert arr[2] == 8 | 255
assert arr[3] == 16 << 4
assert arr[4] == 32 >> 4
assert arr[5] == 64 % 5
assert arr[6] == 128 ^ 3
}
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fn test_ints() {
mut a := [1, 5, 2, 3]
assert a.len == 4
assert a[0] == 1
assert a[2] == 2
assert a.last() == 3
a << 4
assert a.len == 5
assert a[4] == 4
assert a.last() == 4
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s := a.str()
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assert s == '[1, 5, 2, 3, 4]'
assert a[1] == 5
assert a.last() == 4
}
fn test_deleting() {
mut a := [1, 5, 2, 3, 4]
assert a.len == 5
assert a.str() == '[1, 5, 2, 3, 4]'
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a.delete(0)
assert a.str() == '[5, 2, 3, 4]'
assert a.len == 4
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a.delete(1)
assert a.str() == '[5, 3, 4]'
assert a.len == 3
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a.delete(a.len - 1)
assert a.str() == '[5, 3]'
assert a.len == 2
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}
fn test_short() {
a := [1, 2, 3]
assert a.len == 3
assert a.cap == 3
assert a[0] == 1
assert a[1] == 2
assert a[2] == 3
}
fn test_large() {
mut a := [0].repeat(0)
for i in 0..10000 {
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a << i
}
assert a.len == 10000
assert a[234] == 234
}
struct Chunk {
val string
}
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struct Kkk {
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q []Chunk
}
fn test_empty() {
mut chunks := []Chunk{}
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a := Chunk{}
assert chunks.len == 0
chunks << a
assert chunks.len == 1
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chunks = []
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assert chunks.len == 0
chunks << a
assert chunks.len == 1
}
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fn test_push() {
mut a := []int{}
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a << 1
a << 3
assert a[1] == 3
assert a.str() == '[1, 3]'
}
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fn test_insert() {
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mut a := [1, 2]
a.insert(0, 3)
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assert a[0] == 3
assert a[2] == 2
assert a.len == 3
a.insert(1, 4)
assert a[1] == 4
assert a[2] == 1
assert a.len == 4
a.insert(4, 5)
assert a[4] == 5
assert a[3] == 2
assert a.len == 5
mut b := []f64{}
assert b.len == 0
b.insert(0, f64(1.1))
assert b.len == 1
assert b[0] == f64(1.1)
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}
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fn test_insert_many() {
mut a := [3, 4]
a.insert(0, [1, 2])
assert a == [1,2,3,4]
b := [5,6]
a.insert(1, b)
assert a == [1,5,6,2,3,4]
}
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fn test_prepend() {
mut a := []int{}
assert a.len == 0
a.prepend(1)
assert a.len == 1
assert a[0] == 1
mut b := []f64{}
assert b.len == 0
b.prepend(f64(1.1))
assert b.len == 1
assert b[0] == f64(1.1)
}
fn test_prepend_many() {
mut a := [3,4]
a.prepend([1,2])
assert a == [1,2,3,4]
b := [5,6]
a.prepend(b)
assert a == [5,6,1,2,3,4]
}
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fn test_strings() {
a := ['a', 'b', 'c']
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assert a.str() == "['a', 'b', 'c']"
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}
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/*
fn test_compare_ints() {
assert compare_ints(1, 2) == -1
assert compare_ints(2, 1) == 1
assert compare_ints(0, 0) == 0
a := 1
b := 2
assert compare_ints(a, b) == -1
assert compare_ints(b, a) == 1
assert compare_ints(a, a) == 0
}
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*/
fn test_repeat() {
{
a := [0].repeat(5)
assert a.len == 5
assert a[0] == 0 && a[1] == 0 && a[2] == 0 && a[3] == 0 && a[4] == 0
}
{
a := [1.1].repeat(10)
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assert a[0] == 1.1
assert a[5] == 1.1
assert a[9] == 1.1
}
{
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a := [i64(-123)].repeat(10)
assert a[0] == -123
assert a[5] == -123
assert a[9] == -123
}
{
a := [u64(123)].repeat(10)
assert a[0] == 123
assert a[5] == 123
assert a[9] == 123
}
{
a := [1.1].repeat(10)
assert a[0] == 1.1
assert a[5] == 1.1
assert a[9] == 1.1
}
{
a := [1, 2].repeat(2)
assert a[0] == 1
assert a[1] == 2
assert a[2] == 1
assert a[3] == 2
}
{
a := ['1', 'abc'].repeat(2)
assert a[0] == '1'
assert a[1] == 'abc'
assert a[2] == '1'
assert a[3] == 'abc'
}
{
mut a := ['1', 'abc'].repeat(0)
assert a.len == 0
a << 'abc'
assert a[0] == 'abc'
}
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}
fn test_right() {
a := [1, 2, 3, 4]
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c := a[1..a.len]
d := a[1..]
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assert c[0] == 2
assert c[1] == 3
assert d[0] == 2
assert d[1] == 3
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}
fn test_left() {
a := [1, 2, 3]
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c := a[0..2]
d := a[..2]
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assert c[0] == 1
assert c[1] == 2
assert d[0] == 1
assert d[1] == 2
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}
fn test_slice() {
a := [1, 2, 3, 4]
b := a.slice(2, 4)
assert b.len == 2
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assert a.slice(1, 2).len == 1
assert a.len == 4
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}
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fn test_push_many() {
mut a := [1, 2, 3]
b := [4, 5, 6]
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a << b
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assert a.len == 6
assert a[0] == 1
assert a[3] == 4
assert a[5] == 6
}
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fn test_reverse() {
a := [1, 2, 3, 4]
b := ['test', 'array', 'reverse']
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c := a.reverse()
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println(c)
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d := b.reverse()
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for i, _ in c {
assert c[i] == a[a.len - i - 1]
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}
for i, _ in d {
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assert d[i] == b[b.len - i - 1]
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}
e := []int{}
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f := e.reverse()
assert f.len == 0
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}
const (
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c_n = 5
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)
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struct Foooj {
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a [5]int // c_n
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}
fn test_fixed() {
mut nums := [4]int{}
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//x := nums[1..3]
//assert x.len == 2
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assert nums[0] == 0
assert nums[1] == 0
assert nums[2] == 0
assert nums[3] == 0
nums[1] = 7
assert nums[1] == 7
nums2 := [5]int{} // c_n
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assert nums2[c_n - 1] == 0
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}
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fn modify(mut numbers []int) {
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numbers[0] = 777
}
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fn test_mut_slice() {
/*
QTODO
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mut n := [1, 2, 3]
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//modify(mut n)
modify(mut n[..2])
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assert n[0] == 777
modify(mut n[2..])
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assert n[2] == 777
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println(n)
*/
}
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fn double_up(mut a []int) {
for i := 0; i < a.len; i++ {
a[i] = a[i]*2
}
}
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fn double_up_v2(mut a []int) {
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for i, _ in a {
a[i] = a[i]*2 // or val*2, doesn't matter
}
}
fn test_mut_arg() {
mut arr := [1,2,3,4,5,6,7,8,9,10]
double_up(mut arr)
assert arr.str() == '[2, 4, 6, 8, 10, 12, 14, 16, 18, 20]'
arr = [1,2,3,4,5,6,7,8,9,10]
double_up_v2(mut arr)
assert arr.str() == '[2, 4, 6, 8, 10, 12, 14, 16, 18, 20]'
}
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fn test_clone() {
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nums := [1, 2, 3, 4, 100]
nums2 := nums.clone()
assert nums2.len == 5
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assert nums.str() == '[1, 2, 3, 4, 100]'
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assert nums2.str() == '[1, 2, 3, 4, 100]'
assert nums.slice(1, 3).str() == '[2, 3]'
}
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fn test_mutli_array_clone() {
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// 2d array_int
mut a2_1 := [[1, 2, 3], [4, 5, 6]]
mut a2_2 := a2_1.clone()
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a2_1[0][1] = 0
a2_2[1][0] = 0
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assert a2_1 == [[1, 0, 3], [4, 5, 6]]
assert a2_2 == [[1, 2, 3], [0, 5, 6]]
// 2d array_string
mut b2_1 := [['1', '2', '3'], ['4', '5', '6']]
mut b2_2 := b2_1.clone()
b2_1[0][1] = '0'
b2_2[1][0] = '0'
assert b2_1 == [['1', '0', '3'], ['4', '5', '6']]
assert b2_2 == [['1', '2', '3'], ['0', '5', '6']]
// 3d array_int
mut a3_1 := [[[1,1], [2,2], [3,3]], [[4,4], [5,5], [6,6]]]
mut a3_2 := a3_1.clone()
a3_1[0][0][1] = 0
a3_2[0][1][0] = 0
assert a3_1 == [[[1, 0], [2, 2], [3, 3]], [[4, 4], [5, 5], [6, 6]]]
assert a3_2 == [[[1, 1], [0, 2], [3, 3]], [[4, 4], [5, 5], [6, 6]]]
// 3d array_string
mut b3_1 := [[['1','1'], ['2','2'], ['3','3']], [['4','4'], ['5','5'], ['6','6']]]
mut b3_2 := b3_1.clone()
b3_1[0][0][1] = '0'
b3_2[0][1][0] = '0'
assert b3_1 == [[['1','0'], ['2','2'], ['3','3']], [['4','4'], ['5','5'], ['6','6']]]
assert b3_2 == [[['1','1'], ['0','2'], ['3','3']], [['4','4'], ['5','5'], ['6','6']]]
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}
fn test_doubling() {
mut nums := [1, 2, 3, 4, 5]
for i in 0..nums.len {
nums[i] *= 2
}
println(nums.str())
assert nums.str() == '[2, 4, 6, 8, 10]'
}
struct Test2 {
one int
two int
}
struct Test {
a string
mut:
b []Test2
}
// TODO: default array/struct str methods
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fn (ta []Test2) str() string {
mut s := '['
for i, t in ta {
s += t.str()
if i < ta.len-1 {
s += ', '
}
}
s += ']'
return s
}
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fn (t Test2) str() string {
return '{$t.one $t.two}'
}
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fn (t Test) str() string {
return '{$t.a $t.b}'
}
fn test_struct_print() {
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mut a := Test{
a: 'Test'
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b: []
}
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b := Test2{
one: 1
two: 2
}
a.b << b
a.b << b
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assert a.str() == '{Test [{1 2}, {1 2}]}'
assert b.str() == '{1 2}'
assert a.b.str() == '[{1 2}, {1 2}]'
}
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fn test_single_element() {
mut a := [1]
a << 2
assert a.len == 2
assert a[0] == 1
assert a[1] == 2
println(a)
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}
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fn test_find_index() {
// string
a := ['v', 'is', 'great']
assert a.index('v') == 0
assert a.index('is') == 1
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assert a.index('gre') == -1
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// int
b := [1, 2, 3, 4]
assert b.index(1) == 0
assert b.index(4) == 3
assert b.index(5) == -1
// byte
c := [0x22, 0x33, 0x55]
assert c.index(0x22) == 0
assert c.index(0x55) == 2
assert c.index(0x99) == -1
// char
d := [`a`, `b`, `c`]
assert d.index(`b`) == 1
assert d.index(`c`) == 2
assert d.index(`u`) == -1
}
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fn test_multi() {
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a := [[1, 2, 3], [4, 5, 6]]
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assert a.len == 2
assert a[0].len == 3
assert a[0][0] == 1
assert a[0][2] == 3
assert a[1][2] == 6
// TODO
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// b := [ [[1,2,3],[4,5,6]], [[1,2]] ]
// assert b[0][0][0] == 1
}
fn test_in() {
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a := [1, 2, 3]
assert 1 in a
assert 2 in a
assert 3 in a
assert !(4 in a)
assert !(0 in a)
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assert 0 !in a
assert 4 !in a
b := [1, 4, 0]
c := [3, 6, 2, 0]
assert 0 in b
assert 0 in c
}
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fn sum(prev int, curr int) int {
return prev + curr
}
fn sub(prev int, curr int) int {
return prev - curr
}
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/*
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fn test_reduce() {
a := [1, 2, 3, 4, 5]
b := a.reduce(sum, 0)
c := a.reduce(sum, 5)
d := a.reduce(sum, -1)
assert b == 15
assert c == 20
assert d == 14
e := [1, 2, 3]
f := e.reduce(sub, 0)
g := e.reduce(sub, -1)
assert f == -6
assert g == -7
}
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*/
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fn filter_test_helper_1(a int) bool {
return a > 3
}
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fn test_filter() {
a := [1, 2, 3, 4, 5, 6]
b := a.filter(it % 2 == 0)
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assert b.len == 3
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assert b[0] == 2
assert b[1] == 4
assert b[2] == 6
c := ['v', 'is', 'awesome']
d := c.filter(it.len > 1)
assert d[0] == 'is'
assert d[1] == 'awesome'
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////////
arr :=[1,2,3,4,5,6,7,8,9,10]
println(arr.filter(it % 2 == 0 || it % 3 == 0))
assert true
assert [1,2,3].len == 3
mut mut_arr := [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
mut_arr = mut_arr.filter(it < 4)
assert mut_arr.len == 3
assert a.filter(filter_test_helper_1) == [4,5,6]
assert [1,5,10].filter(filter_test_helper_1) == [5,10]
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// TODO
//assert arr.filter(arr % 2).len == 5
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}
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fn test_anon_fn_filter() {
filter_num := fn (i int) bool {
return i % 2 == 0
}
assert [1,2,3,4,5].filter(filter_num) == [2,4]
}
fn test_anon_fn_arg_filter() {
a := [1,2,3,4].filter(fn (i int) bool {
return i % 2 == 0
})
assert a == [2,4]
}
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fn map_test_helper_1(i int) int {
return i * i
}
fn map_test_helper_2(i int, b string) int {
return i + b.len
}
fn map_test_helper_3(i int, b []string) int {
return i + b.map(it.len)[i % b.len]
}
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fn test_map() {
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nums := [1, 2, 3, 4, 5, 6]
strs := ['v', 'is', 'awesome']
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//assert nums.map() == <error>
//assert nums.map(it, 'excessive') == <error>
// identity
assert nums.map(it) == [1, 2, 3, 4, 5, 6]
assert strs.map(it) == ['v', 'is', 'awesome']
assert nums.map(it - it) == [0,0,0,0,0,0]
assert nums.map(it - it)[0] == 0
// type switch
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assert nums.map(it * 10) == [10, 20, 30, 40, 50, 60]
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assert nums.map(it * it) == [1, 4, 9, 16, 25, 36]
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assert nums.map('$it') == ['1', '2', '3', '4', '5', '6']
assert nums.map(it % 2 == 0) == [false, true, false, true, false, true]
assert strs.map(it.to_upper()) == ['V', 'IS', 'AWESOME']
assert strs.map(it == 'awesome') == [false, false, true]
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assert strs.map(it.len in nums) == [true, true, false]
assert strs.map(int(7)) == [7, 7, 7]
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// external func
assert nums.map(map_test_helper_1(it)) == [1, 4, 9, 16, 25, 36]
assert nums.map(map_test_helper_2(it, 'bb')) == [3, 4, 5, 6, 7, 8]
assert nums.map(map_test_helper_3(it, strs)) == [3, 9, 4, 6, 12, 7]
// empty array as input
assert []int{len:0}.map(it * 2) == []
// nested maps (where it is of same type)
assert nums.map( strs.map(int(7)) == [7, 7, 7] ) == [true, true, true, true, true, true]
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assert nums.map( '$it' + strs.map('a')[0] ) == ['1a', '2a', '3a', '4a', '5a', '6a']
assert nums.map( it + strs.map(int(7))[0] ) == [8, 9, 10, 11, 12, 13]
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assert nums.map( it + strs.map(it.len)[0] ) == [2, 3, 4, 5, 6, 7]
assert strs.map( it.len + strs.map(it.len)[0] ) == [2, 3, 8]
// nested (different it types)
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assert strs.map( it[ nums.map(it - it)[0] ] ) == [byte(`v`), `i`, `a`]
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assert nums[0..3].map('$it' + strs.map(it)[it-1]) == ['1v','2is','3awesome']
assert nums.map(map_test_helper_1) == [1,4,9,16,25,36]
assert [1,5,10].map(map_test_helper_1) == [1,25,100]
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assert nums == [1, 2, 3, 4, 5, 6]
assert strs == ['v', 'is', 'awesome']
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}
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fn test_anon_fn_map() {
add_num := fn (i int) int {
return i + 1
}
assert [1,2,3].map(add_num) == [2,3,4]
}
fn test_mutli_anon_fn_map() {
a := [1,2,3].map(fn (i int) int {
return i + 1
})
b := [1,2,3].map(fn (i int) int {
return i + 2
})
assert a == [2,3,4]
assert b == [3,4,5]
}
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fn test_anon_fn_arg_map() {
a := [1,2,3].map(fn (i int) int {
return i + 1
})
assert a == [2,3,4]
}
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fn test_array_str() {
numbers := [1, 2, 3]
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assert numbers == [1,2,3]
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numbers2 := [numbers, [4, 5, 6]] // dup str() bug
_ = numbers2
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assert true
assert numbers.str() == '[1, 2, 3]'
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// QTODO
//assert numbers2.str() == '[[1, 2, 3], [4, 5, 6]]'
}
fn test_eq() {
/*
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assert [5, 6, 7].eq([6, 7]) == false
assert [`a`, `b`].eq([`a`, `b`]) == true
*/
}
struct User {
age int
name string
}
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fn test_sort() {
mut a := ['hi', '1', '5', '3']
a.sort()
assert a[0] == '1'
assert a[1] == '3'
assert a[2] == '5'
assert a[3] == 'hi'
//
mut nums := [67, -3, 108, 42, 7]
nums.sort()
assert nums[0] == -3
assert nums[1] == 7
assert nums[2] == 42
assert nums[3] == 67
assert nums[4] == 108
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//
nums.sort(a < b)
assert nums[0] == -3
assert nums[1] == 7
assert nums[2] == 42
assert nums[3] == 67
assert nums[4] == 108
//
mut users := [User{22, 'Peter'}, User{20, 'Bob'}, User{25, 'Alice'}]
users.sort(a.age < b.age)
assert(users[0].age == 20)
assert(users[1].age == 22)
assert(users[2].age == 25)
assert(users[0].name == 'Bob')
assert(users[1].name == 'Peter')
assert(users[2].name == 'Alice')
//
users.sort(a.age > b.age)
assert(users[0].age == 25)
assert(users[1].age == 22)
assert(users[2].age == 20)
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//
users.sort(a.name < b.name) // Test sorting by string fields
//assert users.map(it.name).join(' ') == 'Alice Bob Peter'
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}
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fn test_f32_sort() {
mut f := [f32(50.0), 15, 1, 79, 38, 0, 27]
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f.sort_with_compare(compare_f32)
assert f[0] == 0.0
assert f[1] == 1.0
assert f[6] == 79.0
}
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fn test_f64_sort() {
mut f := [50.0, 15, 1, 79, 38, 0, 27]
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f.sort_with_compare(compare_f64)
assert f[0] == 0.0
assert f[1] == 1.0
assert f[6] == 79.0
}
fn test_i64_sort() {
mut f := [i64(50), 15, 1, 79, 38, 0, 27]
f.sort_with_compare(compare_i64)
assert f[0] == 0
assert f[1] == 1
assert f[6] == 79
}
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/*
fn test_for_last() {
numbers := [1, 2, 3, 4]
mut s := '['
for num in numbers {
s += '$num'
if !last {
s += ', '
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}
}
s += ']'
assert s == '[1, 2, 3, 4]'
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}
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*/
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struct Foo {
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mut:
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bar []int
}
fn test_in_struct() {
mut baz := Foo{
bar: [0, 0, 0]
}
baz.bar[0] += 2
baz.bar[0]++
assert baz.bar[0] == 3
}
fn test_bools() {
println('test b')
mut a := [true, false]
a << true
println(a)
}
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fn test_push_many_self() {
mut actual_arr := [1, 2, 3, 4]
actual_arr << actual_arr
expected_arr := [1, 2, 3, 4, 1, 2, 3, 4]
assert actual_arr.len == expected_arr.len
for i in 0..actual_arr.len {
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assert actual_arr[i] == expected_arr[i]
}
}
fn test_for() {
nums := [1,2,3]
mut sum := 0
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for num in nums {
sum += num
}
assert sum == 6
}
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fn test_clear() {
mut arr := [1,2,3]
assert arr.len == 3
arr.clear()
assert arr.len == 0
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arr << 3
arr << 2
arr << 1
arr << 0
assert arr.len == 4
assert arr[0] == 3
assert arr[1] == 2
assert arr[2] == 1
assert arr[3] == 0
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arr.clear()
assert arr.len == 0
}
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fn test_trim() {
mut arr := [1,2,3,4,5,6,7,8,9]
assert arr.len == 9
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arr.trim(9)
assert arr.len == 9
assert arr.last() == 9
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arr.trim(7)
assert arr.len == 7
assert arr.last() == 7
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arr.trim(2)
assert arr.len == 2
assert arr.last() == 2
}
fn test_hex(){
// array hex
st := [byte(`V`),`L`,`A`,`N`,`G`]
assert st.hex() == "564c414e47"
assert st.hex().len == 10
st1 := [byte(0x41)].repeat(100)
assert st1.hex() == "41".repeat(100)
}
fn test_left_shift_precendence() {
mut arr := []int{}
arr << 1 + 1
arr << 1 - 1
arr << 2 / 1
arr << 2 * 1
assert arr[0] == 2
assert arr[1] == 0
assert arr[2] == 2
assert arr[3] == 2
}
fn test_array_with_cap() {
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a4 := []int{cap:10, len:1 }
assert a4.len == 1
assert a4.cap == 10
a5 := []int{len:1, cap:10}
assert a5.len == 1
assert a5.cap == 10
}
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fn test_mutli_array_index() {
mut a := [][]int{len:2, init: []int{len:3, init:0}}
a[0][0] = 1
assert '$a' == '[[1, 0, 0], [0, 0, 0]]'
mut b := [[0].repeat(3)].repeat(2)
b[0][0] = 1
assert '$b' == '[[1, 0, 0], [0, 0, 0]]'
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}
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fn test_plus_assign_string() {
mut a := ['']
a[0] += 'abc'
assert a == ['abc']
}
fn mut_arr_with_eq_in_fn(mut a []int) {
if a == [1,2,3,4] {
a[0] = 0
}
if [0,2,3,4] == a {
a[1] = 0
}
if !(a != [0,0,3,4]) {
a[2] = 0
}
if !([0,0,0,4] != a) {
a[3] = 0
}
}
fn test_mut_arr_with_eq_in_fn() {
mut a := [1,2,3,4]
mut_arr_with_eq_in_fn(mut a)
assert a == [0,0,0,0]
}
fn array_in_mut(mut a []int) {
if 1 in a {
a[0] = 2
}
}
fn test_array_in_mut() {
mut a := [1,2]
array_in_mut(mut a)
assert a == [2,2]
}
// test array delete in function with mut argument
fn delete_nums(mut arr []int) {
arr.delete(0)
}
fn test_array_delete_in_mut() {
mut nums := [1, 2, 3]
delete_nums(mut nums)
assert nums == [2, 3]
}
// test array add in function with mut argument
fn add_nums(mut arr []int) {
arr << 4
}
fn test_array_add_in_mut() {
mut nums := [1, 2, 3]
add_nums(mut nums)
assert nums == [1, 2, 3, 4]
}
fn test_reverse_in_place() {
mut a := [1, 2, 3, 4]
a.reverse_in_place()
assert a == [4, 3, 2, 1]
mut b := ['a', 'b', 'c']
b.reverse_in_place()
assert b == ['c', 'b', 'a']
mut c := [[1, 2], [3, 4], [5, 6]]
c.reverse_in_place()
assert c == [[5, 6], [3, 4], [1, 2]]
}
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fn test_array_int_pop() {
mut a := [1,2,3,4,5]
assert a.len == 5
x := a.last()
y := a.pop()
assert x == y
assert a.len == 4
z := a.pop()
assert a.len == 3
assert z == 4
a.pop()
a.pop()
final := a.pop()
assert final == 1
}
fn test_array_string_pop() {
mut a := ['abc', 'def', 'xyz']
assert a.len == 3
assert a.pop() == 'xyz'
assert a.pop() == 'def'
assert a.pop() == 'abc'
assert a.len == 0
assert a.cap == 3
}
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[direct_array_access]
fn test_direct_array_access() {
mut a := [11,22,33,44]
assert a[0] == 11
assert a[2] == 33
x := a[0]
a[0] = 21
a[1] += 2
a[2] = x + 3
a[3] -= a[1]
assert a == [21, 24, 14, 20]
}
[direct_array_access]
fn test_direct_array_access_via_ptr() {
mut b := [11,22,33,44]
unsafe {
mut a := &b
assert a[0] == 11
assert a[2] == 33
x := a[0]
a[0] = 21
a[1] += 2
a[2] = x + 3
a[3] -= a[1]
assert a == [21, 24, 14, 20]
}
}
fn test_push_arr_string_free() {
mut lines := ['hi']
s := 'a' + 'b'
lines << s
s.free() // make sure the data in the array is valid after freeing the string
println(lines)
assert lines.len == 2
assert lines[0] == 'hi'
assert lines[1] == 'ab'
}
const (
grid_size_1 = 2
grid_size_2 = 3
grid_size_3 = 4
cell_value = 123
)
fn test_multidimensional_array_initialization_with_consts() {
mut data := [][][]int{len: grid_size_1, init: [][]int{len: grid_size_2, init: []int{len: grid_size_3, init: cell_value}}}
assert data.len == grid_size_1
assert data[0].len == grid_size_2
assert data[0][0].len == grid_size_3
assert data[0][0][0] == cell_value
assert data[1][1][1] == cell_value
}
fn test_byteptr_vbytes() {
unsafe {
bp := malloc(5)
bp[0] = 1
bp[1] = 2
bp[2] = 3
bp[3] = 4
bp[4] = 255
bytes := bp.vbytes(5)
println(bytes)
assert bytes.len == 5
assert bytes[0] == 1
assert bytes[1] == 2
assert bytes[2] == 3
assert bytes[3] == 4
assert bytes[4] == 255
}
}
fn test_voidptr_vbytes() {
unsafe {
bp := malloc(3)
bp[0] = 4
bp[1] = 5
bp[2] = 6
bytes := voidptr(bp).vbytes(3)
assert bytes.len == 3
assert bytes[0] == 4
assert bytes[1] == 5
assert bytes[2] == 6
println(bytes)
}
}