1 files changed, 88 insertions, 0 deletions
diff --git a/src/pkg/big/nat_test.go b/src/pkg/big/nat_test.go
new file mode 100644
index 000000000..8f9f9cc6a
--- /dev/null
+++ b/src/pkg/big/nat_test.go
@@ -0,0 +1,88 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package big
+
+import "testing"
+
+func TestCmpNN(t *testing.T) {
+	// TODO(gri) write this test - all other tests depends on it
+}
+
+
+type funNN func(z, x, y []Word) []Word
+type argNN struct { z, x, y []Word }
+
+var sumNN = []argNN{
+	argNN{},
+	argNN{[]Word{1}, nil, []Word{1}},
+	argNN{[]Word{1111111110}, []Word{123456789}, []Word{987654321}},
+	argNN{[]Word{0, 0, 0, 1}, nil, []Word{0, 0, 0, 1}},
+	argNN{[]Word{0, 0, 0, 1111111110}, []Word{0, 0, 0, 123456789}, []Word{0, 0, 0, 987654321}},
+	argNN{[]Word{0, 0, 0, 1}, []Word{0, 0, _M}, []Word{0, 0, 1}},
+}
+
+
+func TestSetN(t *testing.T) {
+	for _, a := range sumNN {
+		z := setN(nil, a.z);
+		if cmpNN(z, a.z) != 0 {
+			t.Errorf("got z = %v; want %v", z, a.z);
+		}
+	}
+}
+
+
+func testFunNN(t *testing.T, msg string, f funNN, a argNN) {
+	z := f(nil, a.x, a.y);
+	if cmpNN(z, a.z) != 0 {
+		t.Errorf("%s%+v\n\tgot z = %v; want %v", msg, a, z, a.z);
+	}
+}
+
+
+func TestFunNN(t *testing.T) {
+	for _, a := range sumNN {
+		arg := a;
+		testFunNN(t, "addNN", addNN, arg);
+
+		arg = argNN{a.z, a.y, a.x};
+		testFunNN(t, "addNN symmetric", addNN, arg);
+
+		arg = argNN{a.x, a.z, a.y};
+		testFunNN(t, "subNN", subNN, arg);
+
+		arg = argNN{a.y, a.z, a.x};
+		testFunNN(t, "subNN symmetric", subNN, arg);
+	}
+}
+
+
+type strN struct { x []Word; b int; s string }
+var tabN = []strN{
+	strN{nil, 10,  "0"},
+	strN{[]Word{1}, 10, "1"},
+	strN{[]Word{10}, 10, "10"},
+	strN{[]Word{1234567890}, 10, "1234567890"},
+}
+
+func TestStringN(t *testing.T) {
+	for _, a := range tabN {
+		s := stringN(a.x, a.b);
+		if s != a.s {
+			t.Errorf("stringN%+v\n\tgot s = %s; want %s", a, s, a.s);
+		}
+
+		x, b, n := scanN(nil, a.s, a.b);
+		if cmpNN(x, a.x) != 0 {
+			t.Errorf("scanN%+v\n\tgot z = %v; want %v", a, x, a.x);
+		}
+		if b != a.b {
+			t.Errorf("scanN%+v\n\tgot b = %d; want %d", a, b, a.b);
+		}
+		if n != len(a.s) {
+			t.Errorf("scanN%+v\n\tgot n = %d; want %d", a, n, len(a.s));
+		}
+	}
+}