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125 lines
5.4 KiB
Go
125 lines
5.4 KiB
Go
package fixedpoint
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import (
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"fmt"
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"testing"
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"github.com/stretchr/testify/assert"
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)
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func Test_FormatString(t *testing.T) {
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cases := []struct {
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input string
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prec int
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expected string
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}{
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{input: "0.57", prec: 5, expected: "0.57000"},
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{input: "-0.57", prec: 5, expected: "-0.57000"},
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{input: "0.57123456", prec: 8, expected: "0.57123456"},
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{input: "-0.57123456", prec: 8, expected: "-0.57123456"},
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{input: "0.57123456", prec: 5, expected: "0.57123"},
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{input: "-0.57123456", prec: 5, expected: "-0.57123"},
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{input: "0.57123456", prec: 0, expected: "0"},
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{input: "-0.57123456", prec: 0, expected: "0"},
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{input: "0.57123456", prec: -1, expected: "0"},
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{input: "-0.57123456", prec: -1, expected: "0"},
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{input: "0.57123456", prec: -5, expected: "0"},
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{input: "-0.57123456", prec: -5, expected: "0"},
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{input: "0.57123456", prec: -9, expected: "0"},
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{input: "-0.57123456", prec: -9, expected: "0"},
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{input: "1.23456789", prec: 9, expected: "1.234567890"},
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{input: "-1.23456789", prec: 9, expected: "-1.234567890"},
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{input: "1.02345678", prec: 9, expected: "1.023456780"},
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{input: "-1.02345678", prec: 9, expected: "-1.023456780"},
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{input: "1.02345678", prec: 2, expected: "1.02"},
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{input: "-1.02345678", prec: 2, expected: "-1.02"},
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{input: "1.02345678", prec: 0, expected: "1"},
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{input: "-1.02345678", prec: 0, expected: "-1"},
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{input: "1.02345678", prec: -1, expected: "0"},
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{input: "-1.02345678", prec: -1, expected: "0"},
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{input: "1.02345678", prec: -10, expected: "0"},
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{input: "-1.02345678", prec: -10, expected: "0"},
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{input: "0.0001234", prec: 9, expected: "0.000123400"},
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{input: "-0.0001234", prec: 9, expected: "-0.000123400"},
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{input: "0.0001234", prec: 7, expected: "0.0001234"},
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{input: "-0.0001234", prec: 7, expected: "-0.0001234"},
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{input: "0.0001234", prec: 5, expected: "0.00012"},
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{input: "-0.0001234", prec: 5, expected: "-0.00012"},
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{input: "0.0001234", prec: 3, expected: "0.000"},
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{input: "-0.0001234", prec: 3, expected: "0.000"},
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{input: "0.0001234", prec: 2, expected: "0.00"},
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{input: "-0.0001234", prec: 2, expected: "0.00"},
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{input: "0.0001234", prec: 0, expected: "0"},
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{input: "-0.0001234", prec: 0, expected: "0"},
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{input: "0.00001234", prec: -1, expected: "0"},
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{input: "-0.00001234", prec: -1, expected: "0"},
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{input: "0.00001234", prec: -5, expected: "0"},
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{input: "-0.00001234", prec: -5, expected: "0"},
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{input: "0.00001234", prec: -9, expected: "0"},
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{input: "-0.00001234", prec: -9, expected: "0"},
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{input: "12.3456789", prec: 10, expected: "12.3456789000"},
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{input: "-12.3456789", prec: 10, expected: "-12.3456789000"},
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{input: "12.3456789", prec: 9, expected: "12.345678900"},
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{input: "-12.3456789", prec: 9, expected: "-12.345678900"},
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{input: "12.3456789", prec: 7, expected: "12.3456789"},
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{input: "-12.3456789", prec: 7, expected: "-12.3456789"},
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{input: "12.3456789", prec: 5, expected: "12.34567"},
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{input: "-12.3456789", prec: 5, expected: "-12.34567"},
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{input: "12.3456789", prec: 1, expected: "12.3"},
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{input: "-12.3456789", prec: 1, expected: "-12.3"},
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{input: "12.3456789", prec: 0, expected: "12"},
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{input: "-12.3456789", prec: 0, expected: "-12"},
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{input: "12.3456789", prec: -1, expected: "10"},
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{input: "-12.3456789", prec: -1, expected: "-10"},
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{input: "12.3456789", prec: -2, expected: "0"},
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{input: "-12.3456789", prec: -2, expected: "0"},
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{input: "12.3456789", prec: -3, expected: "0"},
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{input: "-12.3456789", prec: -3, expected: "0"},
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{input: "12345678.9", prec: 10, expected: "12345678.9000000000"},
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{input: "-12345678.9", prec: 10, expected: "-12345678.9000000000"},
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{input: "12345678.9", prec: 3, expected: "12345678.900"},
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{input: "-12345678.9", prec: 3, expected: "-12345678.900"},
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{input: "12345678.9", prec: 1, expected: "12345678.9"},
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{input: "-12345678.9", prec: 1, expected: "-12345678.9"},
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{input: "12345678.9", prec: 0, expected: "12345678"},
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{input: "-12345678.9", prec: 0, expected: "-12345678"},
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{input: "12345678.9", prec: -2, expected: "12345600"},
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{input: "-12345678.9", prec: -2, expected: "-12345600"},
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{input: "12345678.9", prec: -5, expected: "12300000"},
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{input: "-12345678.9", prec: -5, expected: "-12300000"},
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{input: "12345678.9", prec: -7, expected: "10000000"},
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{input: "-12345678.9", prec: -7, expected: "-10000000"},
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{input: "12345678.9", prec: -8, expected: "0"},
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{input: "-12345678.9", prec: -8, expected: "0"},
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{input: "12345678.9", prec: -10, expected: "0"},
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{input: "-12345678.9", prec: -10, expected: "0"},
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{input: "123000", prec: 7, expected: "123000.0000000"},
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{input: "-123000", prec: 7, expected: "-123000.0000000"},
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{input: "123000", prec: 2, expected: "123000.00"},
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{input: "-123000", prec: 2, expected: "-123000.00"},
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{input: "123000", prec: 0, expected: "123000"},
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{input: "-123000", prec: 0, expected: "-123000"},
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{input: "123000", prec: -1, expected: "123000"},
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{input: "-123000", prec: -1, expected: "-123000"},
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{input: "123000", prec: -5, expected: "100000"},
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{input: "-123000", prec: -5, expected: "-100000"},
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{input: "123000", prec: -6, expected: "0"},
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{input: "-123000", prec: -6, expected: "0"},
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{input: "123000", prec: -8, expected: "0"},
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{input: "-123000", prec: -8, expected: "0"},
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}
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for _, c := range cases {
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t.Run(fmt.Sprintf("%s with prec = %d, expected %s", c.input, c.prec, c.expected), func(t *testing.T) {
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v := MustNewFromString(c.input)
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s := v.FormatString(c.prec)
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assert.Equal(t, c.expected, s)
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})
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}
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}
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