[Tests] convert _f_p_g_m doctests into _f_p_g_m_test.py

Tests/ttLib/tables/_f_p_g_m_test.py

@@ -0,0 +1,20 @@
+from __future__ import print_function, division, absolute_import, unicode_literals
+from fontTools.misc.py23 import *
+from fontTools.ttLib.tables._f_p_g_m import table__f_p_g_m
+from fontTools.ttLib.tables import ttProgram
+
+
+def test__bool__():
+    fpgm = table__f_p_g_m()
+    assert not bool(fpgm)
+
+    p = ttProgram.Program()
+    fpgm.program = p
+    assert not bool(fpgm)
+
+    bc = bytearray([0])
+    p.fromBytecode(bc)
+    assert bool(fpgm)
+
+    p.bytecode.pop()
+    assert not bool(fpgm)