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roman_test.go
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roman_test.go
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package roman
import (
"fmt"
"testing"
)
var cases = []struct {
value uint16
numeral string
}{
{1, "I"},
{2, "II"},
{3, "III"},
{40, "XL"},
{47, "XLVII"},
{50, "L"},
{798, "DCCXCVIII"},
{1006, "MVI"},
{1984, "MCMLXXXIV"},
}
func TestRomanNumerals(t *testing.T) {
for _, test := range cases {
t.Run(fmt.Sprintf("%d got converted to %s", test.value, test.numeral), func(t *testing.T) {
got, errrorConverting := ConvertToRoman(test.value)
if errrorConverting != nil {
t.Error(errrorConverting)
}
if got != test.numeral {
t.Errorf("got %v, expected %v", got, test.numeral)
}
})
}
t.Run("Number lower than 1 returns an error", func(t *testing.T) {
_, error := ConvertToRoman(0)
if error == nil {
t.Error("Expected an error, didn't get one.")
}
})
t.Run("Number greater than 3999 returns an error", func(t *testing.T) {
_, error := ConvertToRoman(5000)
if error == nil {
t.Error("Expected an error, didn't get one.")
}
})
}
func TestParseRoman(t *testing.T) {
for _, test := range cases {
t.Run(fmt.Sprintf("%s got converted to %d.", test.numeral, test.value), func(t *testing.T) {
got, errrorConverting := ParseRoman(test.numeral)
if errrorConverting != nil {
t.Error(errrorConverting)
}
if got != test.value {
t.Errorf("Got %d, expected %v.", got, test.value)
}
})
}
t.Run("Invalid Roman numerals returns an error.", func(t *testing.T) {
_, errorParsing := ParseRoman("XXXX")
if errorParsing == nil {
t.Error("Expected an error, didn't get one.")
}
})
}