[pygobject] Add tests for pyg_constant_strip_prefix()

[Christoph Reiter <creiter src gnome org>]

commit 46dbd9455c37223932e9427da3c0217f5dcdec41
Author: Christoph Reiter <reiter christoph gmail com>
Date:   Tue Apr 24 16:00:56 2018 +0200

    Add tests for pyg_constant_strip_prefix()

 tests/test_internal_api.py |  9 +++++++++
 tests/testhelpermodule.c   | 14 ++++++++++++++
 2 files changed, 23 insertions(+)
---
diff --git a/tests/test_internal_api.py b/tests/test_internal_api.py
index 9dcde058..090fdc3c 100644
--- a/tests/test_internal_api.py
+++ b/tests/test_internal_api.py
@@ -116,3 +116,12 @@ def test_to_unichar_conv():
 
     with pytest.raises(TypeError):
         testhelper.test_to_unichar_conv(u"AA")
+
+
+def test_constant_strip_prefix():
+    assert testhelper.constant_strip_prefix("foo", "bar") == "foo"
+    assert testhelper.constant_strip_prefix("foo", "f") == "oo"
+    assert testhelper.constant_strip_prefix("foo", "f") == "oo"
+    assert testhelper.constant_strip_prefix("ha2foo", "ha") == "a2foo"
+    assert testhelper.constant_strip_prefix("2foo", "ha") == "2foo"
+    assert testhelper.constant_strip_prefix("bla_foo", "bla") == "_foo"
diff --git a/tests/testhelpermodule.c b/tests/testhelpermodule.c
index 9fc4fc6f..638727b2 100644
--- a/tests/testhelpermodule.c
+++ b/tests/testhelpermodule.c
@@ -525,6 +525,19 @@ _wrap_test_value_array(PyObject *self, PyObject *args)
   return pyg_value_as_pyobject(value, FALSE);
 }
 
+static PyObject *
+_wrap_constant_strip_prefix(PyObject *self, PyObject *args)
+{
+    const char *name, *strip_prefix;
+    const gchar *result;
+
+    if (!PyArg_ParseTuple (args, "ss", &name, &strip_prefix))
+        return NULL;
+
+    result = pyg_constant_strip_prefix (name, strip_prefix);
+    return PYGLIB_PyUnicode_FromString (result);
+}
+
 static PyObject *
 _wrap_test_gerror_exception(PyObject *self, PyObject *args)
 {
@@ -642,6 +655,7 @@ static PyMethodDef testhelper_functions[] = {
     { "connectcallbacks", (PyCFunction)_wrap_connectcallbacks, METH_VARARGS },
     { "test_value", (PyCFunction)_wrap_test_value, METH_VARARGS },      
     { "test_value_array", (PyCFunction)_wrap_test_value_array, METH_VARARGS },
+    { "constant_strip_prefix", (PyCFunction)_wrap_constant_strip_prefix, METH_VARARGS },
     { "test_gerror_exception", (PyCFunction)_wrap_test_gerror_exception, METH_VARARGS },
     { "owned_by_library_get_instance_list", (PyCFunction)_wrap_test_owned_by_library_get_instance_list, 
METH_NOARGS },
     { "floating_and_sunk_get_instance_list", (PyCFunction)_wrap_test_floating_and_sunk_get_instance_list, 
METH_NOARGS },