Function TestScriptBuilderAddData

txscript/scriptbuilder_test.go:182–314

TestScriptBuilderAddData tests that pushing data to a script via the ScriptBuilder API works as expected and conforms to BIP0062.

(t *testing.T)

// TestScriptBuilderAddData tests that pushing data to a script via the
// ScriptBuilder API works as expected and conforms to BIP0062.
func TestScriptBuilderAddData(t *testing.T) {
	t.Parallel()

	tests := []struct {
		name     string
		data     []byte
		expected []byte
		useFull  bool // use AddFullData instead of AddData.
	}{
		// BIP0062: Pushing an empty byte sequence must use OP_0.
		{name: "push empty byte sequence", data: nil, expected: []byte{OP_0}},
		{name: "push 1 byte 0x00", data: []byte{0x00}, expected: []byte{OP_0}},

		// BIP0062: Pushing a 1-byte sequence of byte 0x01 through 0x10 must use OP_n.
		{name: "push 1 byte 0x01", data: []byte{0x01}, expected: []byte{OP_1}},
		{name: "push 1 byte 0x02", data: []byte{0x02}, expected: []byte{OP_2}},
		{name: "push 1 byte 0x03", data: []byte{0x03}, expected: []byte{OP_3}},
		{name: "push 1 byte 0x04", data: []byte{0x04}, expected: []byte{OP_4}},
		{name: "push 1 byte 0x05", data: []byte{0x05}, expected: []byte{OP_5}},
		{name: "push 1 byte 0x06", data: []byte{0x06}, expected: []byte{OP_6}},
		{name: "push 1 byte 0x07", data: []byte{0x07}, expected: []byte{OP_7}},
		{name: "push 1 byte 0x08", data: []byte{0x08}, expected: []byte{OP_8}},
		{name: "push 1 byte 0x09", data: []byte{0x09}, expected: []byte{OP_9}},
		{name: "push 1 byte 0x0a", data: []byte{0x0a}, expected: []byte{OP_10}},
		{name: "push 1 byte 0x0b", data: []byte{0x0b}, expected: []byte{OP_11}},
		{name: "push 1 byte 0x0c", data: []byte{0x0c}, expected: []byte{OP_12}},
		{name: "push 1 byte 0x0d", data: []byte{0x0d}, expected: []byte{OP_13}},
		{name: "push 1 byte 0x0e", data: []byte{0x0e}, expected: []byte{OP_14}},
		{name: "push 1 byte 0x0f", data: []byte{0x0f}, expected: []byte{OP_15}},
		{name: "push 1 byte 0x10", data: []byte{0x10}, expected: []byte{OP_16}},

		// BIP0062: Pushing the byte 0x81 must use OP_1NEGATE.
		{name: "push 1 byte 0x81", data: []byte{0x81}, expected: []byte{OP_1NEGATE}},

		// BIP0062: Pushing any other byte sequence up to 75 bytes must
		// use the normal data push (opcode byte n, with n the number of
		// bytes, followed n bytes of data being pushed).
		{name: "push 1 byte 0x11", data: []byte{0x11}, expected: []byte{OP_DATA_1, 0x11}},
		{name: "push 1 byte 0x80", data: []byte{0x80}, expected: []byte{OP_DATA_1, 0x80}},
		{name: "push 1 byte 0x82", data: []byte{0x82}, expected: []byte{OP_DATA_1, 0x82}},
		{name: "push 1 byte 0xff", data: []byte{0xff}, expected: []byte{OP_DATA_1, 0xff}},
		{
			name:     "push data len 17",
			data:     bytes.Repeat([]byte{0x49}, 17),
			expected: append([]byte{OP_DATA_17}, bytes.Repeat([]byte{0x49}, 17)...),
		},
		{
			name:     "push data len 75",
			data:     bytes.Repeat([]byte{0x49}, 75),
			expected: append([]byte{OP_DATA_75}, bytes.Repeat([]byte{0x49}, 75)...),
		},

		// BIP0062: Pushing 76 to 255 bytes must use OP_PUSHDATA1.
		{
			name:     "push data len 76",
			data:     bytes.Repeat([]byte{0x49}, 76),
			expected: append([]byte{OP_PUSHDATA1, 76}, bytes.Repeat([]byte{0x49}, 76)...),
		},