45 lines
1.2 KiB
Go
45 lines
1.2 KiB
Go
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//go:build dnum
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package fixedpoint
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import (
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"testing"
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"github.com/stretchr/testify/assert"
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)
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func TestDelta(t *testing.T) {
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f1 := MustNewFromString("0.0009763593380614657")
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f2 := NewFromInt(42300)
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assert.InDelta(t, f1.Mul(f2).Float64(), 41.3, 1e-14)
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}
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func TestFloor(t *testing.T) {
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f1 := MustNewFromString("10.333333")
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f2 := f1.Floor()
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assert.Equal(t, "10", f2.String())
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}
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func TestInternal(t *testing.T) {
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r := &reader{"1.1e-15", 0}
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c, e := r.getCoef()
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assert.Equal(t, uint64(1100000000000000), c)
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assert.Equal(t, 1, e)
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f := MustNewFromString("1.1e-15")
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digits := getDigits(f.coef)
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assert.Equal(t, "11", digits)
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f = MustNewFromString("1.00000000000000111")
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assert.Equal(t, "1.000000000000001", f.String())
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f = MustNewFromString("1.1e-15")
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assert.Equal(t, "0.0000000000000011", f.String())
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assert.Equal(t, 16, f.NumFractionalDigits())
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f = MustNewFromString("1.00000000000000111")
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assert.Equal(t, "1.000000000000001", f.String())
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f = MustNewFromString("0.00000000000000000001000111")
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assert.Equal(t, "0.00000000000000000001000111", f.String())
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f = MustNewFromString("0.000000000000000000001000111")
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assert.Equal(t, "1.000111e-21", f.String())
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f = MustNewFromString("1e-100")
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assert.Equal(t, 100, f.NumFractionalDigits())
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}
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