87 lines
2.0 KiB
Go
87 lines
2.0 KiB
Go
package langext
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import (
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"git.blackforestbytes.com/BlackForestBytes/goext/tst"
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"strings"
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"testing"
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)
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func TestEncodeBase62Zero(t *testing.T) {
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tst.AssertEqual(t, EncodeBase62(0), "0")
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}
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func TestEncodeBase62Small(t *testing.T) {
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tst.AssertEqual(t, EncodeBase62(1), "1")
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tst.AssertEqual(t, EncodeBase62(9), "9")
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tst.AssertEqual(t, EncodeBase62(10), "A")
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tst.AssertEqual(t, EncodeBase62(35), "Z")
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tst.AssertEqual(t, EncodeBase62(36), "a")
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tst.AssertEqual(t, EncodeBase62(61), "z")
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tst.AssertEqual(t, EncodeBase62(62), "10")
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}
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func TestDecodeBase62Empty(t *testing.T) {
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_, err := DecodeBase62("")
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if err == nil {
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t.Errorf("expected error on empty input")
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}
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}
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func TestDecodeBase62Invalid(t *testing.T) {
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_, err := DecodeBase62("foo!bar")
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if err == nil {
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t.Errorf("expected error on invalid character")
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}
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}
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func TestDecodeBase62Basic(t *testing.T) {
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v, err := DecodeBase62("0")
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if err != nil {
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t.Fatalf("unexpected error: %v", err)
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}
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tst.AssertEqual(t, v, uint64(0))
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v, err = DecodeBase62("10")
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if err != nil {
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t.Fatalf("unexpected error: %v", err)
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}
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tst.AssertEqual(t, v, uint64(62))
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}
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func TestEncodeDecodeBase62RoundTrip(t *testing.T) {
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for _, n := range []uint64{0, 1, 61, 62, 100, 12345, 1<<32 - 1, 1 << 40} {
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s := EncodeBase62(n)
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v, err := DecodeBase62(s)
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if err != nil {
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t.Errorf("decode error for %d (encoded %q): %v", n, s, err)
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continue
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}
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tst.AssertEqual(t, v, n)
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}
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}
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func TestRandBase62Length(t *testing.T) {
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for _, l := range []int{0, 1, 8, 32, 64} {
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s := RandBase62(l)
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tst.AssertEqual(t, len(s), l)
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}
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}
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func TestRandBase62Alphabet(t *testing.T) {
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const alphabet = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
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s := RandBase62(256)
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for _, r := range s {
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if !strings.ContainsRune(alphabet, r) {
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t.Errorf("character %q not in base62 alphabet", string(r))
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}
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}
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}
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func TestRandBase62Distinct(t *testing.T) {
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a := RandBase62(32)
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b := RandBase62(32)
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if a == b {
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t.Errorf("two base62 random strings of length 32 should not be equal")
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}
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}
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