fix (masonry.api): get_requires_for_build_wheel must return additio…

…nal list of requirements for building a package, not listed in `pyproject.toml` and not dependencies for the package itself (#1875)

fix (tests): adopted tests

poetry/masonry/api.py

@@ -20,13 +20,14 @@
 
 def get_requires_for_build_wheel(config_settings=None):
     """
-    Returns a list of requirements for building, as strings
-    """
-    poetry = Factory().create_poetry(Path("."))
+    Returns an additional list of requirements for building, as PEP508 strings,
+    above and beyond those specified in the pyproject.toml file.
 
-    main, _ = SdistBuilder.convert_dependencies(poetry.package, poetry.package.requires)
+    This implementation is optional. At the moment it only returns an empty list, which would be the same as if
+    not define. So this is just for completeness for future implementation.
+    """
 
-    return main
+    return []
 
 
 # For now, we require all dependencies to build either a wheel or an sdist.

tests/masonry/test_api.py

@@ -28,15 +28,15 @@ def cwd(directory):
 
 
 def test_get_requires_for_build_wheel():
-    expected = ["cleo>=0.6.0,<0.7.0", "cachy[msgpack]>=0.2.0,<0.3.0"]
+    expected = []
     with cwd(os.path.join(fixtures, "complete")):
-        api.get_requires_for_build_wheel() == expected
+        assert api.get_requires_for_build_wheel() == expected
 
 
 def test_get_requires_for_build_sdist():
-    expected = ["cleo>=0.6.0,<0.7.0", "cachy[msgpack]>=0.2.0,<0.3.0"]
+    expected = []
     with cwd(os.path.join(fixtures, "complete")):
-        api.get_requires_for_build_sdist() == expected
+        assert api.get_requires_for_build_sdist() == expected
 
 
 def test_build_wheel():