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59 lines
1.5 KiB
Go
59 lines
1.5 KiB
Go
package op
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import (
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"strings"
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"testing"
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)
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func assertExprResult(t *testing.T, expected int64, instructions []byte) {
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t.Helper()
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actual, _, err := ExecuteStackProgram(DwarfRegisters{}, instructions, 8, nil)
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if err != nil {
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t.Error(err)
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}
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if actual != expected {
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buf := new(strings.Builder)
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PrettyPrint(buf, instructions)
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t.Errorf("actual %d != expected %d (in %s)", actual, expected, buf.String())
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}
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}
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func TestExecuteStackProgram(t *testing.T) {
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assertExprResult(t, 56, []byte{byte(DW_OP_consts), 0x1c, byte(DW_OP_consts), 0x1c, byte(DW_OP_plus)})
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}
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func TestSignExtension(t *testing.T) {
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var tgt uint64 = 0xffffffffffffff88
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assertExprResult(t, int64(tgt), []byte{byte(DW_OP_const1s), 0x88})
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tgt = 0xffffffffffff8888
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assertExprResult(t, int64(tgt), []byte{byte(DW_OP_const2s), 0x88, 0x88})
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}
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func TestStackOps(t *testing.T) {
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assertExprResult(t, 1, []byte{byte(DW_OP_lit1), byte(DW_OP_lit2), byte(DW_OP_drop)})
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assertExprResult(t, 0, []byte{byte(DW_OP_lit1), byte(DW_OP_lit0), byte(DW_OP_pick), 0})
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assertExprResult(t, 1, []byte{byte(DW_OP_lit1), byte(DW_OP_lit0), byte(DW_OP_pick), 1})
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}
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func TestBra(t *testing.T) {
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assertExprResult(t, 32, []byte{
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byte(DW_OP_lit1),
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byte(DW_OP_lit5),
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byte(DW_OP_dup),
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byte(DW_OP_lit0),
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byte(DW_OP_eq),
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byte(DW_OP_bra), 9, 0x0,
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byte(DW_OP_swap),
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byte(DW_OP_dup),
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byte(DW_OP_plus),
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byte(DW_OP_swap),
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byte(DW_OP_lit1),
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byte(DW_OP_minus),
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byte(DW_OP_skip), 0xf1, 0xff,
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byte(DW_OP_drop),
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})
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}
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