gematriya_test.go

package gematriya

import (
	"fmt"
	"strconv"
	"testing"
)

func TestGematriya(t *testing.T) {
	tests := []struct {
		number int
		want   string
	}{
		{3, "ג׳"},
		{14, "י״ד"},
		{15, "ט״ו"}, // 9+6 rather than 10+5
		{16, "ט״ז"}, // 9+7 rather than 10+6
		{17, "י״ז"},
		{20, "כ׳"},
		{25, "כ״ה"},
		{60, "ס׳"},
		{115, "קט״ו"}, // the 15 rule still applies below a hundreds letter
		{116, "קט״ז"},
		{123, "קכ״ג"},
		{400, "ת׳"},
		{500, "ת״ק"}, // 400+100, there being no letter above tav
		{613, "תרי״ג"},
		{900, "תת״ק"},
		{999, "תתקצ״ט"},
		{5749, "תשמ״ט"}, // present millennium: the leading 5 is omitted
		{5774, "תשע״ד"},
		{5780, "תש״פ"},
		{1123, "א׳קכ״ג"},
		{3761, "ג׳תשס״א"},
		{6749, "ו׳תשמ״ט"},
		{8765, "ח׳תשס״ה"},
		{16123, "טז׳קכ״ג"},
		{22700, "כב׳ת״ש"},
		{6000, "ו׳"}, // no letters below the thousands
		{7007, "ז׳ז׳"},
		{5000, ""}, // the elided 5 leaves nothing to write
		{0, ""},
		{-1, ""},
	}
	for _, tt := range tests {
		t.Run(strconv.Itoa(tt.number), func(t *testing.T) {
			if got := Gematriya(tt.number); got != tt.want {
				t.Errorf("Gematriya(%d) = %q, want %q", tt.number, got, tt.want)
			}
		})
	}
}

func ExampleGematriya() {
	gematriya := Gematriya(5749)
	fmt.Println(gematriya)
	// Output: תשמ״ט
}

var sink string

func BenchmarkGematriya(b *testing.B) {
	for i := 0; i < b.N; i++ {
		sink = Gematriya(5749)
	}
}

func BenchmarkGematriyaThousands(b *testing.B) {
	for i := 0; i < b.N; i++ {
		sink = Gematriya(16123)
	}
}