hatmill/attribute/coords_test.go

package attribute_test

import (
	"testing"

	"git.codemonkeysoftware.net/b/hatmill/attribute"
)

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
			s    string
		}{
			{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) {
				expectEqualStrings(t, attribute.CoordsList{testcase.f}.String(), testcase.s)
			})
		}
	})

	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)
	})
}