86 lines
2.5 KiB
Go
86 lines
2.5 KiB
Go
package helper
|
|
|
|
import (
|
|
"math"
|
|
"testing"
|
|
)
|
|
|
|
func TestEqFloat64Fuzzy(t *testing.T) {
|
|
tests := []struct {
|
|
name string
|
|
a, b float64
|
|
want bool
|
|
}{
|
|
{"exactly equal", 1, 1, true},
|
|
{"nearly equal", 1, math.Nextafter(1, math.Inf(1)), true},
|
|
{"zero equal to itself", +0., -0., true},
|
|
{"zero not equal to non-zero", 0., 1e-9, false},
|
|
{"definitely not equal", 1, 1 + 1e-9, false},
|
|
{"infinity equal to itself", math.Inf(1), math.Inf(1), true},
|
|
{"infinity not equal to a finite value", math.Inf(1), 1, false},
|
|
{"NaN equal to itself", math.NaN(), math.NaN(), true},
|
|
{"NaN not equal to a finite value", math.NaN(), 1, false},
|
|
{"NaN not equal to infinity", math.NaN(), math.Inf(1), false},
|
|
|
|
// these are actual numbers encountered that should be equal, but failed the test at some point.
|
|
// keeping them around as test cases.
|
|
{"testcase1", 0.0015172579307272023, 0.001517257930727202, true},
|
|
{"testcase2", 0, -8.131516293641283e-20, true},
|
|
{"testcase3", 0, -5.0186702124817295e-20, true},
|
|
{"testcase4", 0, -6.776263578034403e-21, true},
|
|
}
|
|
for _, tt := range tests {
|
|
t.Run(tt.name, func(t *testing.T) {
|
|
if got := EqFloat64Fuzzy(tt.a, tt.b); got != tt.want {
|
|
t.Errorf("EqFloat64Fuzzy(%v, %v) = %v, want %v", tt.a, tt.b, got, tt.want)
|
|
}
|
|
|
|
// swapping the arguments shouldn't change the outcome.
|
|
if got := EqFloat64Fuzzy(tt.b, tt.a); got != tt.want {
|
|
t.Errorf("EqFloat64Fuzzy(%v, %v) = %v, want %v", tt.b, tt.a, got, tt.want)
|
|
}
|
|
|
|
// negating the arguments shouldn't change the outcome either
|
|
if got := EqFloat64Fuzzy(-tt.a, -tt.b); got != tt.want {
|
|
t.Errorf("EqFloat64Fuzzy(%v, %v) = %v, want %v", -tt.a, -tt.b, got, tt.want)
|
|
}
|
|
|
|
if got := EqFloat64Fuzzy(tt.b, tt.a); got != tt.want {
|
|
t.Errorf("EqFloat64Fuzzy(%v, %v) = %v, want %v", -tt.b, -tt.a, got, tt.want)
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
func TestEqFloat64SliceFuzzy(t *testing.T) {
|
|
tests := []struct {
|
|
name string
|
|
a, b []float64
|
|
want bool
|
|
}{
|
|
{
|
|
"equivalent float slices",
|
|
[]float64{1, 2, 3, math.NaN()},
|
|
[]float64{1, 2, math.Nextafter(3, math.Inf(1)), math.NaN()},
|
|
true,
|
|
}, {
|
|
"dissimilar float slices",
|
|
[]float64{1, 2, 4},
|
|
[]float64{1, 3, 4},
|
|
false,
|
|
}, {
|
|
"different lengths",
|
|
[]float64{1, 2},
|
|
[]float64{1, 2, 3},
|
|
false,
|
|
},
|
|
}
|
|
for _, tt := range tests {
|
|
t.Run(tt.name, func(t *testing.T) {
|
|
if got := EqFloat64SliceFuzzy(tt.a, tt.b); got != tt.want {
|
|
t.Errorf("EqFloat64SliceFuzzy(%v, %v) = %v, want %v", tt.a, tt.b, got, tt.want)
|
|
}
|
|
})
|
|
}
|
|
}
|