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Defined CoordsList type

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This commit is contained in:
Brandon Dyck 2019-08-31 12:46:32 -06:00
parent 5412e5e108
commit edb347c9ea
2 changed files with 43 additions and 35 deletions
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22
attribute/coords.go
View File

@ -1,19 +1,27 @@
package attribute
import (
"strconv"
"strings"
"bytes"
"gitlab.codemonkeysoftware.net/b/hatmill"
)
func Coords(values ...float32) hatmill.Attrib {
s := make([]string, 0, len(values))
for _, value := range values {
s = append(s, strconv.FormatFloat(float64(value), 'G', -1, 32))
type CoordsList []float32
func (l CoordsList) String() string {
var buf bytes.Buffer
for i, f := range l {
if i > 0 {
buf.WriteRune(',')
}
buf.WriteString(Float(f).String())
}
return buf.String()
}
func Coords(values ...float32) hatmill.Attrib {
return hatmill.Attrib{
Key: "coords",
Value: String(strings.Join(s, ",")),
Value: CoordsList(values),
}
}

42
attribute/coords_test.go
View File

@ -6,35 +6,35 @@ import (
"gitlab.codemonkeysoftware.net/b/hatmill/attribute"
)
func TestCoordsNumberFormat(t *testing.T) {
func TestCoordsList(t *testing.T) {
t.Run("String returns empty string for empty list", func(t *testing.T) {
expectEqualStrings(t, attribute.CoordsList(nil).String(), "")
})
t.Run("String uses valid number format", func(t *testing.T) {
for _, testcase := range []struct {
name string
f float32
value string
s string
}{
{name: "zero", f: 0, value: "0"},
{name: "integral", f: 45, value: "45"},
{name: "positive fractional, small positive exponent", f: 12.55, value: "12.55"},
{name: "positive fractional, large positive exponent", f: 1.55E+12, value: "1.55E+12"},
{name: "positive fractional, large negative exponent", f: 1.55E-12, value: "1.55E-12"},
{name: "negative fractional, small positive exponent", f: -12.55, value: "-12.55"},
{name: "negative fractional, large positive exponent", f: -1.55E+12, value: "-1.55E+12"},
{name: "negative fractional, large negative exponent", f: -1.55E-12, value: "-1.55E-12"},
{name: "zero", f: 0, s: "0"},
{name: "integral", f: 45, s: "45"},
{name: "positive fractional, small positive exponent", f: 12.55, s: "12.55"},
{name: "positive fractional, large positive exponent", f: 1.55E+12, s: "1.55E+12"},
{name: "positive fractional, large negative exponent", f: 1.55E-12, s: "1.55E-12"},
{name: "negative fractional, small positive exponent", f: -12.55, s: "-12.55"},
{name: "negative fractional, large positive exponent", f: -1.55E+12, s: "-1.55E+12"},
{name: "negative fractional, large negative exponent", f: -1.55E-12, s: "-1.55E-12"},
} {
t.Run(testcase.name, func(t *testing.T) {
testAttribValue(t, attribute.Coords(testcase.f), testcase.value)
expectEqualStrings(t, attribute.CoordsList{testcase.f}.String(), testcase.s)
})
}
}
})
func TestCoordsCardinality(t *testing.T) {
t.Run("zero", func(t *testing.T) {
testAttribValue(t, attribute.Coords(), "")
})
t.Run("one", func(t *testing.T) {
testAttribValue(t, attribute.Coords(5), "5")
})
t.Run("many", func(t *testing.T) {
testAttribValue(t, attribute.Coords(5, 4, 3, 2, 1), "5,4,3,2,1")
t.Run("String inserts delimiter in lists with length > 1", func(t *testing.T) {
actual := attribute.CoordsList{0, 0}.String()
expected := "0,0"
expectEqualStrings(t, actual, expected)
})
}