82 lines
2.7 KiB
Go
82 lines
2.7 KiB
Go
package mssql
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import (
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"testing"
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)
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func TestToString(t *testing.T) {
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values := []struct {
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dec Decimal
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s string
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}{
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{Decimal{positive: true, prec: 10, scale: 0, integer: [4]uint32{1, 0, 0, 0}}, "1"},
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{Decimal{positive: false, prec: 10, scale: 0, integer: [4]uint32{1, 0, 0, 0}}, "-1"},
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{Decimal{positive: true, prec: 10, scale: 1, integer: [4]uint32{1, 0, 0, 0}}, "0.1"},
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{Decimal{positive: false, prec: 10, scale: 1, integer: [4]uint32{1, 0, 0, 0}}, "-0.1"},
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{Decimal{positive: true, prec: 10, scale: 2, integer: [4]uint32{100, 0, 0, 0}}, "1.00"},
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{Decimal{positive: false, prec: 10, scale: 2, integer: [4]uint32{100, 0, 0, 0}}, "-1.00"},
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{Decimal{positive: true, prec: 30, scale: 0, integer: [4]uint32{0, 1, 0, 0}}, "4294967296"}, // 2^32
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{Decimal{positive: true, prec: 30, scale: 0, integer: [4]uint32{0, 0, 1, 0}}, "18446744073709551616"}, // 2^64
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{Decimal{positive: true, prec: 30, scale: 0, integer: [4]uint32{0, 1, 1, 0}}, "18446744078004518912"}, // 2^64+2^32
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}
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for _, v := range values {
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if v.dec.String() != v.s {
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t.Error("String values don't match ", v.dec.String(), v.s)
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}
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}
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}
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func TestToFloat64(t *testing.T) {
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values := []struct {
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dec Decimal
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flt float64
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}{
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{Decimal{positive: true, prec: 1},
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0.0},
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{Decimal{positive: true, prec: 1, integer: [4]uint32{1}},
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1.0},
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{Decimal{positive: false, prec: 1, integer: [4]uint32{1}},
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-1.0},
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{Decimal{positive: true, prec: 1, scale: 1, integer: [4]uint32{5}},
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0.5},
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{Decimal{positive: true, prec: 38, integer: [4]uint32{0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff}},
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3.402823669209385e+38},
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{Decimal{positive: true, prec: 38, scale: 3, integer: [4]uint32{0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff}},
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3.402823669209385e+35},
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}
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for _, v := range values {
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if v.dec.ToFloat64() != v.flt {
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t.Error("ToFloat values don't match ", v.dec.ToFloat64(), v.flt)
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}
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}
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}
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func TestFromFloat64(t *testing.T) {
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values := []struct {
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dec Decimal
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flt float64
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}{
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{Decimal{positive: true, prec: 20},
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0.0},
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{Decimal{positive: true, prec: 20, integer: [4]uint32{1}},
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1.0},
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{Decimal{positive: false, prec: 20, integer: [4]uint32{1}},
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-1.0},
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{Decimal{positive: true, prec: 20, scale: 1, integer: [4]uint32{5}},
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0.5},
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{Decimal{positive: true, prec: 20, integer: [4]uint32{0, 0, 0xfffff000, 0xffffffff}},
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3.402823669209384e+38},
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//{Decimal{positive: true, prec: 20, scale: 3, integer: [4]uint32{0, 0, 0xfffff000, 0xffffffff}},
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// 3.402823669209385e+35},
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}
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for _, v := range values {
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decfromflt, err := Float64ToDecimal(v.flt)
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if err == nil {
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if decfromflt != v.dec {
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t.Error("FromFloat values don't match ", decfromflt, v.dec)
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}
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} else {
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t.Error("Float64ToDecimal failed with error:", err.Error())
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}
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}
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}
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