x86: rel types and generated tests

internal/gen/util_test.go

@@ -0,0 +1,46 @@
+package gen
+
+import (
+	"reflect"
+	"testing"
+)
+
+func TestCross(t *testing.T) {
+	x := [][]string{
+		{"a", "b", "c"},
+		{"1", "2"},
+		{"!", "?"},
+	}
+	expect := [][]string{
+		{"a", "1", "!"},
+		{"a", "1", "?"},
+		{"a", "2", "!"},
+		{"a", "2", "?"},
+		{"b", "1", "!"},
+		{"b", "1", "?"},
+		{"b", "2", "!"},
+		{"b", "2", "?"},
+		{"c", "1", "!"},
+		{"c", "1", "?"},
+		{"c", "2", "!"},
+		{"c", "2", "?"},
+	}
+	got := cross(x)
+	if !reflect.DeepEqual(got, expect) {
+		t.Errorf("bad cross product")
+	}
+}
+
+func TestCrossSimple(t *testing.T) {
+	x := [][]string{
+		{"a", "b"},
+	}
+	expect := [][]string{
+		{"a"},
+		{"b"},
+	}
+	got := cross(x)
+	if !reflect.DeepEqual(got, expect) {
+		t.Errorf("bad cross product")
+	}
+}