Use libabigail to track NDK ABIs.

The local diffing behavior is currently flagged off so we can land
this in stages.

Test: pytest cc
Test: treehugger
Test: development/tools/update_ndk_abi.sh
Test: m ndk
Bug: http://b/156513478
Change-Id: Iccb314411bc74ea3ddfea8b85b0539709295f65a
diff --git a/cc/ndkstubgen/test_ndkstubgen.py b/cc/ndkstubgen/test_ndkstubgen.py
index 6d2c9d6..3dbab61 100755
--- a/cc/ndkstubgen/test_ndkstubgen.py
+++ b/cc/ndkstubgen/test_ndkstubgen.py
@@ -33,8 +33,10 @@
         # OmitVersionTest, PrivateVersionTest, and SymbolPresenceTest.
         src_file = io.StringIO()
         version_file = io.StringIO()
-        generator = ndkstubgen.Generator(src_file, version_file, Arch('arm'),
-                                         9, False, False)
+        symbol_list_file = io.StringIO()
+        generator = ndkstubgen.Generator(src_file,
+                                         version_file, symbol_list_file,
+                                         Arch('arm'), 9, False, False)
 
         version = symbolfile.Version('VERSION_PRIVATE', None, [], [
             symbolfile.Symbol('foo', []),
@@ -62,8 +64,10 @@
         # SymbolPresenceTest.
         src_file = io.StringIO()
         version_file = io.StringIO()
-        generator = ndkstubgen.Generator(src_file, version_file, Arch('arm'),
-                                         9, False, False)
+        symbol_list_file = io.StringIO()
+        generator = ndkstubgen.Generator(src_file,
+                                         version_file, symbol_list_file,
+                                         Arch('arm'), 9, False, False)
 
         version = symbolfile.Version('VERSION_1', None, [], [
             symbolfile.Symbol('foo', [Tag('x86')]),
@@ -96,8 +100,10 @@
     def test_write(self) -> None:
         src_file = io.StringIO()
         version_file = io.StringIO()
-        generator = ndkstubgen.Generator(src_file, version_file, Arch('arm'),
-                                         9, False, False)
+        symbol_list_file = io.StringIO()
+        generator = ndkstubgen.Generator(src_file,
+                                         version_file, symbol_list_file,
+                                         Arch('arm'), 9, False, False)
 
         versions = [
             symbolfile.Version('VERSION_1', None, [], [
@@ -141,6 +147,17 @@
         """)
         self.assertEqual(expected_version, version_file.getvalue())
 
+        expected_allowlist = textwrap.dedent("""\
+            [abi_symbol_list]
+            foo
+            bar
+            woodly
+            doodly
+            baz
+            qux
+        """)
+        self.assertEqual(expected_allowlist, symbol_list_file.getvalue())
+
 
 class IntegrationTest(unittest.TestCase):
     def test_integration(self) -> None:
@@ -186,8 +203,10 @@
 
         src_file = io.StringIO()
         version_file = io.StringIO()
-        generator = ndkstubgen.Generator(src_file, version_file, Arch('arm'),
-                                         9, False, False)
+        symbol_list_file = io.StringIO()
+        generator = ndkstubgen.Generator(src_file,
+                                         version_file, symbol_list_file,
+                                         Arch('arm'), 9, False, False)
         generator.write(versions)
 
         expected_src = textwrap.dedent("""\
@@ -215,6 +234,16 @@
         """)
         self.assertEqual(expected_version, version_file.getvalue())
 
+        expected_allowlist = textwrap.dedent("""\
+            [abi_symbol_list]
+            foo
+            baz
+            qux
+            wibble
+            wobble
+        """)
+        self.assertEqual(expected_allowlist, symbol_list_file.getvalue())
+
     def test_integration_future_api(self) -> None:
         api_map = {
             'O': 9000,
@@ -238,8 +267,10 @@
 
         src_file = io.StringIO()
         version_file = io.StringIO()
-        generator = ndkstubgen.Generator(src_file, version_file, Arch('arm'),
-                                         9001, False, False)
+        symbol_list_file = io.StringIO()
+        generator = ndkstubgen.Generator(src_file,
+                                         version_file, symbol_list_file,
+                                         Arch('arm'), 9001, False, False)
         generator.write(versions)
 
         expected_src = textwrap.dedent("""\
@@ -257,6 +288,13 @@
         """)
         self.assertEqual(expected_version, version_file.getvalue())
 
+        expected_allowlist = textwrap.dedent("""\
+            [abi_symbol_list]
+            foo
+            bar
+        """)
+        self.assertEqual(expected_allowlist, symbol_list_file.getvalue())
+
     def test_multiple_definition(self) -> None:
         input_file = io.StringIO(textwrap.dedent("""\
             VERSION_1 {
@@ -336,8 +374,10 @@
 
         src_file = io.StringIO()
         version_file = io.StringIO()
-        generator = ndkstubgen.Generator(src_file, version_file, Arch('arm'),
-                                         9, False, True)
+        symbol_list_file = io.StringIO()
+        generator = ndkstubgen.Generator(src_file,
+                                         version_file, symbol_list_file,
+                                         Arch('arm'), 9, False, True)
         generator.write(versions)
 
         expected_src = textwrap.dedent("""\