Add a test case for ttconv

If I enable svg, I see artifacts in the resulting file that look like there are similar bugs as #903 in svg.
matplotlib · jkseppan · May 31, 2012 · May 27, 2012 · May 29, 2012 · May 29, 2012
commit 253d2be79e520a00a8290be7909540ec54d9b4f9
diff --git a/lib/matplotlib/mpl-data/fonts/ttf/mpltest.ttf b/lib/matplotlib/mpl-data/fonts/ttf/mpltest.ttf
diff --git a/lib/matplotlib/tests/baseline_images/test_ttconv/truetype-conversion.pdf b/lib/matplotlib/tests/baseline_images/test_ttconv/truetype-conversion.pdf
diff --git a/lib/matplotlib/tests/baseline_images/test_ttconv/truetype-conversion.png b/lib/matplotlib/tests/baseline_images/test_ttconv/truetype-conversion.png
diff --git a/lib/matplotlib/tests/test_ttconv.py b/lib/matplotlib/tests/test_ttconv.py
@@ -0,0 +1,13 @@
+import matplotlib
+from matplotlib.testing.decorators import image_comparison
+import matplotlib.pyplot as plt
+
+@image_comparison(baseline_images=["truetype-conversion"],
+                  extensions=["pdf", "png"])
+def test_truetype_conversion():
+    matplotlib.rcParams['pdf.fonttype'] = 3
+    fig = plt.figure()
+    ax = fig.add_subplot(111)
+    ax.text(0, 0, "ABCDE", name="mpltest", fontsize=80)
+    ax.set_xticks([])
+    ax.set_yticks([])