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package furgit
import (
"strings"
"testing"
)
func TestParseHashValidAndInvalid(t *testing.T) {
pattern := "0123456789abcdef"
repeats := (testHashSize*2 + len(pattern) - 1) / len(pattern)
hexStr := strings.Repeat(pattern, repeats)[:testHashSize*2]
repo := &Repository{HashSize: testHashSize}
id, err := repo.ParseHash(hexStr)
if err != nil {
t.Fatalf("ParseHash returned error: %v", err)
}
if got := id.String(); got != hexStr {
t.Fatalf("unexpected String result: %q", got)
}
if _, err := repo.ParseHash("abcd"); err == nil {
t.Fatal("expected error for short hash")
}
badHex := strings.Repeat("z", testHashSize*2)
if _, err := repo.ParseHash(badHex); err == nil {
t.Fatal("expected error for non-hex input")
}
}
func TestHashBytesCopiesUnderlyingData(t *testing.T) {
var id Hash
for i := range id.data {
id.data[i] = byte(i)
}
id.size = testHashSize
orig := id.Bytes()
orig[0] ^= 0xff
if id.data[0] == orig[0] {
t.Fatal("Bytes should return a copy")
}
}
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