Test and fix for the case where ffi.embedding_api() is called but

does not list any `extern "Python"` function

3 files changed, 22 insertions, 1 deletions

diff --git a/testing/embedding/empty-test.c b/testing/embedding/empty-test.c
new file mode 100644
index 0000000..b00dd50
--- /dev/null
+++ b/testing/embedding/empty-test.c
@@ -0,0 +1,11 @@
+#include <stdio.h>
+
+void initialize_my_empty_cffi(void);
+
+int main(void)
+{
+    initialize_my_empty_cffi();
+    printf("OK\n");
+    return 0;
+}
+
diff --git a/testing/embedding/empty.py b/testing/embedding/empty.py
index aa8d830..1093505 100644
--- a/testing/embedding/empty.py
+++ b/testing/embedding/empty.py
@@ -4,7 +4,14 @@ ffi = cffi.FFI()
 
 ffi.embedding_api("")
 
-ffi.set_source("_empty_cffi", "")
+ffi.set_source("_empty_cffi", """
+void initialize_my_empty_cffi(void) {
+    if (cffi_start_python() != 0) {
+        printf("oops, cffi_start_python() returned non-0\\n");
+        abort();
+    }
+}
+""")
 
 fn = ffi.compile(verbose=True)
 print('FILENAME: %s' % (fn,))
diff --git a/testing/embedding/test_basic.py b/testing/embedding/test_basic.py
index 8d2e776..b29afd2 100644
--- a/testing/embedding/test_basic.py
+++ b/testing/embedding/test_basic.py
@@ -180,6 +180,9 @@ if sys.platform == 'win32':
 class TestBasic(EmbeddingTests):
     def test_empty(self):
         empty_cffi = self.prepare_module('empty')
+        self.compile('empty-test', [empty_cffi])
+        output = self.execute('empty-test')
+        assert output == 'OK\n'
 
     def test_basic(self):
         add1_cffi = self.prepare_module('add1')