v/vlib/builtin/float_test.v

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fn test_float_decl() {
// z := 1f
// assert z > 0
x1 := 1e10
x2 := -2e16
x3 := 1e-15
x4 := -9e-4
assert typeof(x1).name == 'f64'
assert typeof(x2).name == 'f64'
assert typeof(x3).name == 'f64'
assert typeof(x4).name == 'f64'
x5 := 4e108
x6 := -7e99
x7 := 3e-205
x8 := -6e-147
assert typeof(x5).name == 'f64'
assert typeof(x6).name == 'f64'
assert typeof(x7).name == 'f64'
assert typeof(x8).name == 'f64'
x9 := 312874834.77
x10 := -22399994.06
x11 := 0.0000000019
x12 := -0.00000000008
assert typeof(x9).name == 'f64'
assert typeof(x10).name == 'f64'
assert typeof(x11).name == 'f64'
assert typeof(x12).name == 'f64'
x13 := 34234234809890890898903213154353453453253253243432413232228908902183918392183902432432438980380123021983901392183921389083913890389089031.0
x14 := -39999999999999999999222212128182813294989082302832183928343325325233253242312331324392839238239829389038097438248932789371837218372837293.8
x15 := 0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000002
x16 := -0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000004
assert typeof(x13).name == 'f64'
assert typeof(x14).name == 'f64'
assert typeof(x15).name == 'f64'
assert typeof(x16).name == 'f64'
}
fn test_f32_equal_operator() {
b := f32(1.0)
mut a := f32(1.0)
a += 0.0000019073486328125
assert a != b
a -= 0.0000019073486328125
assert a == b
assert -1 == 1 * -1
assert -1.0 == 1.0 * -1.0
a = 1
a += 0.0000019073486328125
a -= 0.0000019073486328125
assert a == f32(1.0)
a += 0.000001
assert !(a < f32(1))
assert !(a <= f32(1))
assert a > f32(1)
assert a >= 1
assert a != 1
f := 1.2
ab := int(f)
assert ab == 1
e := f32(-1.602176634e-19)
m := f32(9.1093837015e-31)
assert e < m
assert e <= m
assert e != m
assert !(e == m)
assert m >= e
assert m > e
}
fn test_f64_equal_operator() {
b := 1.0
mut a := 1.0
a += 0.0000019073486328125
assert a != b
a -= 0.0000019073486328125
assert a == b
e := -1.602176634e-19
m := 9.1093837015e-31
assert e < m
assert e <= m
assert e != m
assert !(e == m)
assert m >= e
assert m > e
}
fn test_f64_eq_epsilon() {
a := 1.662248544459347e308
b := 1.662248544459348e308
x := 1.662248544459352e308
assert a != b
assert a.eq_epsilon(b)
assert b.eq_epsilon(a)
assert (-a).eq_epsilon(-b)
assert (-b).eq_epsilon(-a)
assert !a.eq_epsilon(x)
assert !x.eq_epsilon(a)
assert !a.eq_epsilon(-b)
assert !(-a).eq_epsilon(b)
c := 1.5367748374385438503
d := -1.5367748374385447257
z := 1.5367748378943546
assert c != -d
assert c.eq_epsilon(-d)
assert d.eq_epsilon(-c)
assert !c.eq_epsilon(z)
assert !z.eq_epsilon(c)
e := 2.531434251587394233e-308
f := 2.531434251587395675e-308
y := 2.531434251587398934e-308
assert e != f
assert e.eq_epsilon(f)
assert (-f).eq_epsilon(-e)
assert !e.eq_epsilon(y)
assert !(-y).eq_epsilon(-e)
}
fn test_f32_eq_epsilon() {
a := f32(3.244331e38)
b := f32(3.244332e38)
x := f32(3.244338e38)
assert a != b
assert a.eq_epsilon(b)
assert b.eq_epsilon(a)
assert (-a).eq_epsilon(-b)
assert (-b).eq_epsilon(-a)
assert !a.eq_epsilon(x)
assert !(-x).eq_epsilon(-a)
assert !a.eq_epsilon(-b)
assert !(-a).eq_epsilon(b)
c := f32(0.9546742)
d := f32(-0.9546745)
z := f32(0.9546754)
assert c != -d
assert c.eq_epsilon(-d)
assert d.eq_epsilon(-c)
assert !c.eq_epsilon(z)
assert !z.eq_epsilon(c)
e := f32(-1.5004390e-38)
f := f32(-1.5004395e-38)
y := f32(-1.5004409e-38)
assert e != f
assert e.eq_epsilon(f)
assert (-f).eq_epsilon(-e)
assert !e.eq_epsilon(y)
assert !(-y).eq_epsilon(-e)
}
fn test_float_point_formatting_rounding() {
float_1 := 462.18
float_2 := 45.02227
float_3 := 238.5
float_4 := 239.5
assert '${float_1:0.0f}' == '462'
assert '${float_2:0.0f}' == '45'
assert '${float_3:0.0f}' == '239'
assert '${float_4:0.0f}' == '240'
//
//
assert '${239.5555551:0.0f}' == '240'
assert '${239.5555551:0.1f}' == '239.6'
assert '${239.5555551:0.2f}' == '239.56'
assert '${239.5555551:0.3f}' == '239.556'
assert '${239.5555551:0.4f}' == '239.5556'
assert '${239.5555551:0.5f}' == '239.55556'
assert '${239.5555551:0.6f}' == '239.555555'
assert '${239.5555551:0.7f}' == '239.5555551'
assert '${239.5555551:0.8f}' == '239.55555510'
assert '${239.5555551:0.9f}' == '239.555555100'
assert '${239.5555551:0.10f}' == '239.5555551000'
assert '${239.5555551:0.11f}' == '239.55555510000'
//
assert '${239.5:0.0f}' == '240'
assert '${239.55:0.1f}' == '239.6'
assert '${239.555:0.2f}' == '239.56'
assert '${239.5555:0.3f}' == '239.555' // NB: 5 ?
assert '${239.55555:0.4f}' == '239.5556'
assert '${239.555555:0.5f}' == '239.55555' // NB: 5 ?
assert '${239.5555555:0.6f}' == '239.555556' // after this, it is all ending in 6
assert '${239.55555555:0.7f}' == '239.5555556'
assert '${239.555555555:0.8f}' == '239.55555556'
assert '${239.5555555555:0.9f}' == '239.555555556'
assert '${239.55555555555:0.10f}' == '239.5555555556'
//
assert '${239.5550:0.3f}' == '239.555'
assert '${239.5551:0.3f}' == '239.555'
assert '${239.5552:0.3f}' == '239.555'
assert '${239.5553:0.3f}' == '239.555'
assert '${239.5554:0.3f}' == '239.555'
assert '${239.5555:0.3f}' == '239.555'
assert '${239.5556:0.3f}' == '239.556' // rounding at last 6 ?
assert '${239.5557:0.3f}' == '239.556'
assert '${239.5558:0.3f}' == '239.556'
assert '${239.5559:0.3f}' == '239.556'
//
assert '${239.5555551:0.6f}' == '239.555555'
assert '${239.5555552:0.6f}' == '239.555555'
assert '${239.5555553:0.6f}' == '239.555555'
assert '${239.5555554:0.6f}' == '239.555555'
assert '${239.5555555:0.6f}' == '239.555556'
assert '${239.5555556:0.6f}' == '239.555556'
assert '${239.5555557:0.6f}' == '239.555556'
assert '${239.5555558:0.6f}' == '239.555556'
assert '${239.5555559:0.6f}' == '239.555556'
//
assert '${239.55555555555:0.10f}' == '239.5555555556'
assert '${239.55555555555:0.9f}' == '239.555555556'
assert '${239.55555555555:0.8f}' == '239.55555556'
assert '${239.55555555555:0.7f}' == '239.5555556'
assert '${239.55555555555:0.6f}' == '239.555556'
assert '${239.55555555555:0.5f}' == '239.55556'
assert '${239.55555555555:0.4f}' == '239.5556'
assert '${239.55555555555:0.3f}' == '239.556'
assert '${239.55555555555:0.2f}' == '239.56'
assert '${239.55555555555:0.1f}' == '239.6'
assert '${239.55555555555:0.0f}' == '240'
//
assert '${-239.55555555555:0.10f}' == '-239.5555555556'
assert '${-239.55555555555:0.9f}' == '-239.555555556'
assert '${-239.55555555555:0.8f}' == '-239.55555556'
assert '${-239.55555555555:0.7f}' == '-239.5555556'
assert '${-239.55555555555:0.6f}' == '-239.555556'
assert '${-239.55555555555:0.5f}' == '-239.55556'
assert '${-239.55555555555:0.4f}' == '-239.5556'
assert '${-239.55555555555:0.3f}' == '-239.556'
assert '${-239.55555555555:0.2f}' == '-239.56'
assert '${-239.55555555555:0.1f}' == '-239.6'
assert '${-239.55555555555:0.0f}' == '-240'
}