matrix is done

Signed-off-by: Casey Lee <cplee@nektos.com>

pkg/common/cartesian_test.go

@@ -0,0 +1,28 @@
+package common
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestCartisianProduct(t *testing.T) {
+	assert := assert.New(t)
+	input := map[string][]interface{}{
+		"foo": []interface{}{1, 2, 3, 4},
+		"bar": []interface{}{"a", "b", "c"},
+		"baz": []interface{}{false, true},
+	}
+
+	output := CartesianProduct(input)
+	assert.Len(output, 24)
+
+	for _, v := range output {
+		assert.Len(v, 3)
+
+		assert.Contains(v, "foo")
+		assert.Contains(v, "bar")
+		assert.Contains(v, "baz")
+	}
+
+}