Added WIP number package

1 files changed, 92 insertions, 0 deletions

diff --git a/ethutil/number/uint_test.go b/ethutil/number/uint_test.go
new file mode 100644
index 000000000..c42989465
--- /dev/null
+++ b/ethutil/number/uint_test.go
@@ -0,0 +1,92 @@
+package number
+
+import (
+	"math/big"
+	"testing"
+
+	"github.com/ethereum/go-ethereum/ethutil"
+)
+
+func TestSet(t *testing.T) {
+	a := Uint(0)
+	b := Uint(10)
+	a.Set(b)
+	if a.num.Cmp(b.num) != 0 {
+		t.Error("didn't compare", a, b)
+	}
+
+	c := Uint(0).SetBytes(ethutil.Hex2Bytes("0a"))
+	if c.num.Cmp(big.NewInt(10)) != 0 {
+		t.Error("c set bytes failed.")
+	}
+}
+
+func TestInitialiser(t *testing.T) {
+	check := false
+	init := NewInitialiser(func(x *Number) *Number {
+		check = true
+		return x
+	})
+	a := init(0).Add(init(1), init(2))
+	if a.Cmp(init(3)) != 0 {
+		t.Error("expected 3. got", a)
+	}
+	if !check {
+		t.Error("expected limiter to be called")
+	}
+}
+
+func TestGet(t *testing.T) {
+	a := Uint(10)
+	if a.Uint64() != 10 {
+		t.Error("expected to get 10. got", a.Uint64())
+	}
+
+	a = Uint(10)
+	if a.Int64() != 10 {
+		t.Error("expected to get 10. got", a.Int64())
+	}
+}
+
+func TestCmp(t *testing.T) {
+	a := Uint(10)
+	b := Uint(10)
+	c := Uint(11)
+
+	if a.Cmp(b) != 0 {
+		t.Error("a b == 0 failed", a, b)
+	}
+
+	if a.Cmp(c) >= 0 {
+		t.Error("a c < 0 failed", a, c)
+	}
+
+	if c.Cmp(b) <= 0 {
+		t.Error("c b > 0 failed", c, b)
+	}
+}
+
+func TestMaxArith(t *testing.T) {
+	a := Uint(0).Add(MaxUint256, One)
+	if a.Cmp(Zero) != 0 {
+		t.Error("expected max256 + 1 = 0 got", a)
+	}
+
+	a = Uint(0).Sub(Uint(0), One)
+	if a.Cmp(MaxUint256) != 0 {
+		t.Error("expected 0 - 1 = max256 got", a)
+	}
+
+	a = Int(0).Sub(Int(0), One)
+	if a.Cmp(MinOne) != 0 {
+		t.Error("expected 0 - 1 = -1 got", a)
+	}
+}
+
+func TestConversion(t *testing.T) {
+	a := Int(-1)
+	b := a.Uint256()
+	if b.Cmp(MaxUint256) != 0 {
+		t.Error("expected -1 => unsigned to return max. got", b)
+	}
+}