diff --git a/matrix_test.go b/matrix_test.go
new file mode 100644
index 0000000..18ed3a2
--- /dev/null
+++ b/matrix_test.go
@@ -0,0 +1,33 @@
+package datok
+
+import (
+	"bytes"
+	"strings"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestFullTokenizerMatrix(t *testing.T) {
+	assert := assert.New(t)
+	foma := LoadFomaFile("testdata/simpletok.fst")
+	assert.NotNil(foma)
+
+	mat := foma.ToMatrix()
+
+	r := strings.NewReader("  wald   gehen Da kann\t man was \"erleben\"!")
+	b := make([]byte, 0, 2048)
+	w := bytes.NewBuffer(b)
+	var tokens []string
+	mat.Transduce(r, w)
+	tokens = strings.Split(w.String(), "\n")
+	assert.Equal(len(tokens), 9)
+	assert.Equal("wald", tokens[0])
+	assert.Equal("gehen", tokens[1])
+	assert.Equal("Da", tokens[2])
+	assert.Equal("kann", tokens[3])
+	assert.Equal("man", tokens[4])
+	assert.Equal("was", tokens[5])
+	assert.Equal("\"erleben\"", tokens[6])
+	assert.Equal("!", tokens[7])
+}