package kept

import (
	"errors"
	"strings"
	"testing"
)

func TestAKeptValueIsReadOnlyAtItsVersionAndAKeyPartOnlyOfKeyCharacters(t *testing.T) {
	var v struct{ V int }
	for data, ok := range map[string]bool{`{"v":1}`: true, `{"v":2}`: false, `{}`: false} {
		err := Decode([]byte(data), &v)
		if (err == nil) != ok || (!ok && !errors.Is(err, ErrUnknownVersion)) {
			t.Errorf("Decode(%s) = %v", data, err)
		}
	}
	if Decode([]byte(`nope`), &v) == nil {
		t.Error("a value that is no JSON is read")
	}
	for name, ok := range map[string]bool{"a-b_c/d=": true, "": false, "a.b": false, "a b": false, "a*": false} {
		if (CheckName("module", name) == nil) != ok {
			t.Errorf("CheckName(%q) = %v", name, CheckName("module", name))
		}
	}
	if !IsHex64(strings.Repeat("a", 64)) || IsHex64(strings.Repeat("A", 64)) || IsHex64("a") {
		t.Error("IsHex64 reads a wrong form")
	}
	if CheckDigest("sha256:"+strings.Repeat("0", 64), "x") != nil || CheckDigest("sha256:0", "x") == nil {
		t.Error("CheckDigest reads a wrong form")
	}
}