1 files changed, 94 insertions, 0 deletions
diff --git a/tests/test_sources.py b/tests/test_sources.py
new file mode 100644
index 0000000..a79cc24
--- /dev/null
+++ b/tests/test_sources.py
@@ -0,0 +1,94 @@
+import posixpath
+import zipfile
+
+import pytest
+
+from installer.records import parse_record_file
+from installer.sources import WheelFile, WheelSource
+
+
+class TestWheelSource:
+    def test_takes_two_arguments(self):
+        WheelSource("distribution", "version")
+        WheelSource(distribution="distribution", version="version")
+
+    def test_correctly_computes_properties(self):
+        source = WheelSource(distribution="distribution", version="version")
+
+        assert source.data_dir == "distribution-version.data"
+        assert source.dist_info_dir == "distribution-version.dist-info"
+
+    def test_raises_not_implemented_error(self):
+        source = WheelSource(distribution="distribution", version="version")
+
+        with pytest.raises(NotImplementedError):
+            source.dist_info_filenames
+
+        with pytest.raises(NotImplementedError):
+            source.read_dist_info("METADATA")
+
+        with pytest.raises(NotImplementedError):
+            source.get_contents()
+
+
+class TestWheelFile:
+    def test_rejects_not_okay_name(self, tmp_path):
+        # Create an empty zipfile
+        path = tmp_path / "not_a_valid_name.whl"
+        with zipfile.ZipFile(str(path), "w"):
+            pass
+
+        with pytest.raises(ValueError, match="Not a valid wheel filename: .+"):
+            with WheelFile.open(str(path)):
+                pass
+
+    def test_provides_correct_dist_info_filenames(self, fancy_wheel):
+        with WheelFile.open(fancy_wheel) as source:
+            assert sorted(source.dist_info_filenames) == [
+                "METADATA",
+                "RECORD",
+                "WHEEL",
+                "entry_points.txt",
+                "top_level.txt",
+            ]
+
+    def test_correctly_reads_from_dist_info_files(self, fancy_wheel):
+        files = {}
+        with zipfile.ZipFile(fancy_wheel) as archive:
+            for file in archive.namelist():
+                if ".dist-info" not in file:
+                    continue
+                files[posixpath.basename(file)] = archive.read(file).decode("utf-8")
+
+        got_files = {}
+        with WheelFile.open(fancy_wheel) as source:
+            for file in files:
+                got_files[file] = source.read_dist_info(file)
+
+        assert got_files == files
+
+    def test_provides_correct_contents(self, fancy_wheel):
+        # Know the contents of the wheel
+        files = {}
+        with zipfile.ZipFile(fancy_wheel) as archive:
+            for file in archive.namelist():
+                if file[-1:] == "/":
+                    continue
+                files[file] = archive.read(file)
+
+        expected_record_lines = (
+            files["fancy-1.0.0.dist-info/RECORD"].decode("utf-8").splitlines()
+        )
+        expected_records = list(parse_record_file(expected_record_lines))
+
+        # Check that the object's output is appropriate
+        got_records = []
+        got_files = {}
+        with WheelFile.open(fancy_wheel) as source:
+            for record_elements, stream, is_executable in source.get_contents():
+                got_records.append(record_elements)
+                got_files[record_elements[0]] = stream.read()
+                assert not is_executable
+
+        assert sorted(got_records) == sorted(expected_records)
+        assert got_files == files