package bundle

import "testing"

func TestValidateDigest(t *testing.T) {
	tests := []struct {
		name    string
		value   string
		wantErr bool
	}{
		{
			name:  "valid",
			value: "sha256:0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef",
		},
		{
			name:    "uppercase hex",
			value:   "sha256:0123456789ABCDEF0123456789abcdef0123456789abcdef0123456789abcdef",
			wantErr: true,
		},
		{
			name:    "missing prefix",
			value:   "0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef",
			wantErr: true,
		},
		{
			name:    "wrong algorithm",
			value:   "sha512:0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef",
			wantErr: true,
		},
		{
			name:    "short hex",
			value:   "sha256:0123456789abcdef",
			wantErr: true,
		},
		{
			name:    "long hex",
			value:   "sha256:0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef0",
			wantErr: true,
		},
		{
			name:    "non hex",
			value:   "sha256:0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdeg",
			wantErr: true,
		},
	}

	for _, test := range tests {
		t.Run(test.name, func(t *testing.T) {
			err := ValidateDigest(test.value)
			if test.wantErr && err == nil {
				t.Fatal("ValidateDigest() error = nil, want error")
			}
			if !test.wantErr && err != nil {
				t.Fatalf("ValidateDigest() error = %v", err)
			}
		})
	}
}