Function TestRemoveOpcodeByData

txscript/script_test.go:344–501

TestRemoveOpcodeByData ensures that removing data carrying opcodes based on the data they contain works as expected.

(t *testing.T)

// TestRemoveOpcodeByData ensures that removing data carrying opcodes based on
// the data they contain works as expected.
func TestRemoveOpcodeByData(t *testing.T) {
	t.Parallel()

	tests := []struct {
		name   string
		before []byte
		remove []byte
		err    error
		after  []byte
	}{
		{
			name:   "nothing to do",
			before: []byte{OP_NOP},
			remove: []byte{1, 2, 3, 4},
			after:  []byte{OP_NOP},
		},
		{
			name:   "",
			before: []byte{OP_NOP, OP_DATA_8, 1, 2, 3, 4, 5, 6, 7, 8, OP_DATA_4, 1, 2, 3, 4},
			remove: []byte{1, 2, 3, 4},
			after:  []byte{OP_NOP, OP_DATA_8, 1, 2, 3, 4, 5, 6, 7, 8},
		},
		{
			name:   "simple case",
			before: []byte{OP_DATA_4, 1, 2, 3, 4},
			remove: []byte{1, 2, 3, 4},
			after:  nil,
		},
		{
			name:   "simple case (miss)",
			before: []byte{OP_DATA_4, 1, 2, 3, 4},
			remove: []byte{1, 2, 3, 5},
			after:  []byte{OP_DATA_4, 1, 2, 3, 4},
		},
		{
			// padded to keep it canonical.
			name: "simple case (pushdata1)",
			before: append(append([]byte{OP_PUSHDATA1, 76},
				bytes.Repeat([]byte{0}, 72)...),
				[]byte{1, 2, 3, 4}...),
			remove: []byte{1, 2, 3, 4},
			after: append(append([]byte{OP_PUSHDATA1, 76},
				bytes.Repeat([]byte{0}, 72)...),
				[]byte{1, 2, 3, 4}...),
		},
		{
			name: "simple case (pushdata1 miss)",
			before: append(append([]byte{OP_PUSHDATA1, 76},
				bytes.Repeat([]byte{0}, 72)...),
				[]byte{1, 2, 3, 4}...),
			remove: []byte{1, 2, 3, 5},
			after: append(append([]byte{OP_PUSHDATA1, 76},
				bytes.Repeat([]byte{0}, 72)...),
				[]byte{1, 2, 3, 4}...),
		},
		{
			name:   "simple case (pushdata1 miss noncanonical)",
			before: []byte{OP_PUSHDATA1, 4, 1, 2, 3, 4},