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v/vlib/builtin/array_test.v

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const (
q = [1, 2, 3]
A = 8
)
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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}
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)
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for i := 0; i < 10000; i++ {
a << i
}
assert a.len == 10000
assert a[234] == 234
}
struct Chunk {
val string
}
struct K {
q []Chunk
}
fn test_empty() {
mut chunks := []Chunk{}
a := Chunk{}
assert chunks.len == 0
chunks << a
assert chunks.len == 1
chunks = []Chunk{}
assert chunks.len == 0
chunks << a
assert chunks.len == 1
}
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fn test_push() {
mut a := []int
a << 1
a << 3
assert a[1] == 3
assert a.str() == '[1, 3]'
}
fn test_strings() {
a := ['a', 'b', 'c']
assert a.str() == '["a", "b", "c"]'
}
fn test_repeat() {
a := [0].repeat(5)
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assert a.len == 5
assert a[0] == 0 && a[1] == 0 && a[2] == 0 && a[3] == 0 && a[4] == 0
b := [7].repeat(3)
assert b.len == 3
assert b[0] == 7 && b[1] == 7 && b[2] == 7
{
mut aa := [1.1].repeat(10)
// FIXME: assert aa[0] == 1.1 will fail, need fix
assert aa[0] == f32(1.1)
assert aa[5] == f32(1.1)
assert aa[9] == f32(1.1)
}
{
mut aa := [f32(1.1)].repeat(10)
assert aa[0] == f32(1.1)
assert aa[5] == f32(1.1)
assert aa[9] == f32(1.1)
}
{
aa := [f64(1.1)].repeat(10)
assert aa[0] == f64(1.1)
assert aa[5] == f64(1.1)
assert aa[9] == f64(1.1)
}
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}
fn test_right() {
a := [1, 2, 3, 4]
b := a.right(1)
assert b[0] == 2
assert b[1] == 3
}
fn test_right_with_n_bigger_than_array_size() {
a := [1, 2, 3, 4]
mut b := a.right(10)
assert b.len == 0
// also check that the result of a.right
// is an array of the same type/element size as a:
b << 5
b << 6
assert b.len == 2
assert b[0] == 5
assert b[1] == 6
}
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fn test_left() {
a := [1, 2, 3]
b := a.left(2)
assert b[0] == 1
assert b[1] == 2
}
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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}
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() {
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mut a := [1, 2, 3, 4]
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mut b := ['test', 'array', 'reverse']
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c := a.reverse()
d := b.reverse()
for i, _ in c {
assert c[i] == a[a.len-i-1]
}
for i, _ in d {
assert d[i] == b[b.len-i-1]
}
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}
const (
N = 5
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)
fn test_fixed() {
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mut nums := [4]int
assert nums[0] == 0
assert nums[1] == 0
assert nums[2] == 0
assert nums[3] == 0
nums[1] = 7
assert nums[1] == 7
nums2 := [N]int
assert nums2[N - 1] == 0
}
fn modify (numbers mut []int) {
numbers[0] = 777
}
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fn test_mut_slice() {
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mut n := [1,2,3]
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modify(mut n.left(2))
assert n[0] == 777
modify(mut n.right(2))
assert n[2] == 777
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println(n)
}
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fn test_clone() {
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nums := [1, 2, 3, 4, 100]
nums2 := nums.clone()
assert nums2.len == 5
assert nums2.str() == '[1, 2, 3, 4, 100]'
assert nums.slice(1, 3).str() == '[2, 3]'
}
fn test_doubling() {
mut nums := [1, 2, 3, 4, 5]
for i := 0; i < nums.len; i++ {
nums[i] *= 2
}
assert nums.str() == '[2, 4, 6, 8, 10]'
}
struct Test2 {
one int
two int
}
struct Test {
a string
mut:
b []Test2
}
fn (t Test2) str() string {
return '{$t.one $t.two}'
}
fn (t Test) str() string {
return '{$t.a $t.b}'
}
fn test_struct_print() {
mut a := Test {
a: 'Test',
b: []Test2
}
b := Test2 {
one: 1,
two: 2
}
a.b << b
a.b << b
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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fn test_find_index() {
// string
a := ['v', 'is', 'great']
assert a.index('v') == 0
assert a.index('is') == 1
assert a.index('gre') == -1
// 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() {
a := [[1,2,3],[4,5,6]]
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() {
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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fn callback_1(val int, index int, arr []int) bool {
return val >= 2
}
fn callback_2(val string, index int, arr []string) bool {
return val.len >= 2
}
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fn test_filter2() {
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a := [1, 2, 3, 4, 5, 6]
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b := a.filter2(callback_1)
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assert b[0] == 2
assert b[1] == 3
c := ['v', 'is', 'awesome']
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d := c.filter2(callback_2)
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assert d[0] == 'is'
assert d[1] == 'awesome'
}
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fn sum(prev int, curr int) int {
return prev + curr
}
fn sub(prev int, curr int) int {
return prev - curr
}
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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fn test_filter() {
a := [1, 2, 3, 4, 5, 6]
b := a.filter(it % 2 == 0)
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'
}