Test the detection of known Rust binaries (mandiant#855)

* Test the detection of known Rust binaries

---------

Co-authored-by: Moritz <[email protected]>

tests/test_language_rust_known_binary.py

@@ -0,0 +1,136 @@
+import pathlib
+import zipfile
+
+import pytest
+
+from floss.language.rust.extract import extract_rust_strings
+
+
+@pytest.fixture(scope="module")
+def extract_files(request):
+    def _extract_files(zip_file_name, extracted_dir_name):
+        zip_file_path = (
+            pathlib.Path(__file__).parent
+            / "data"
+            / "language"
+            / "rust"
+            / "rust-binaries-all-versions"
+            / "bin"
+            / zip_file_name
+        )
+
+        CD = pathlib.Path(__file__).resolve().parent
+
+        abs_zip_path = (CD / zip_file_path).resolve()
+        assert abs_zip_path.exists(), f"Zip file {zip_file_path} does not exist"
+
+        extracted_files = []
+
+        with zipfile.ZipFile(abs_zip_path, "r") as zip_ref:
+            for zip_info in zip_ref.infolist():
+                extracted_file_path = (
+                    CD
+                    / "data"
+                    / "language"
+                    / "rust"
+                    / "rust-binaries-all-versions"
+                    / "bin"
+                    / extracted_dir_name
+                    / zip_info.filename
+                ).resolve()
+                extracted_file = zip_ref.extract(zip_info, path=extracted_file_path.parent)
+                extracted_files.append(extracted_file)
+
+        yield
+
+        # Clean up - remove the extracted files after the test finishes
+        for extracted_file in extracted_files:
+            pathlib.Path(extracted_file).unlink()
+        pathlib.Path(extracted_file_path.parent).rmdir()
+
+    return _extract_files
+
+
+@pytest.fixture(scope="module")
+def extract_files_64(request, extract_files):
+    yield from extract_files("versions_64.zip", "extracted_64")
+
+
+@pytest.fixture(scope="module")
+def extract_files_32(request, extract_files):
+    yield from extract_files("versions_32.zip", "extracted_32")
+
+
+@pytest.mark.parametrize(
+    "binary_file",
+    [
+        ("data/language/rust/rust-binaries-all-versions/bin/extracted_64/rust1.56.0.exe"),
+        ("data/language/rust/rust-binaries-all-versions/bin/extracted_64/rust1.58.0.exe"),
+        ("data/language/rust/rust-binaries-all-versions/bin/extracted_64/rust1.60.0.exe"),
+        ("data/language/rust/rust-binaries-all-versions/bin/extracted_64/rust1.62.0.exe"),
+        ("data/language/rust/rust-binaries-all-versions/bin/extracted_64/rust1.64.0.exe"),
+        ("data/language/rust/rust-binaries-all-versions/bin/extracted_64/rust1.66.0.exe"),
+        ("data/language/rust/rust-binaries-all-versions/bin/extracted_64/rust1.68.0.exe"),
+        ("data/language/rust/rust-binaries-all-versions/bin/extracted_64/rust1.70.0.exe"),
+    ],
+)
+def test_language_detection_64(binary_file, extract_files_64):
+    expected_strings = [
+        "the quick brown fox jumps over the lazy dog",
+        "Pangram: ",
+        "Used characters: ",
+        "Alice says: ",
+        "Bob says: ",
+    ]
+
+    CD = pathlib.Path(__file__).resolve().parent
+    abs_path = (CD / binary_file).resolve()
+
+    assert abs_path.exists(), f"File {binary_file} does not exist"
+
+    rust_strings = extract_rust_strings(abs_path, 6)
+
+    strings = []
+
+    for rust_string in rust_strings:
+        strings.append(rust_string.string)
+
+    assert all(elem in strings for elem in expected_strings)
+
+
+@pytest.mark.parametrize(
+    "binary_file",
+    [
+        ("data/language/rust/rust-binaries-all-versions/bin/extracted_32/rust1.56.0.exe"),
+        ("data/language/rust/rust-binaries-all-versions/bin/extracted_32/rust1.58.0.exe"),
+        ("data/language/rust/rust-binaries-all-versions/bin/extracted_32/rust1.60.0.exe"),
+        ("data/language/rust/rust-binaries-all-versions/bin/extracted_32/rust1.62.0.exe"),
+        ("data/language/rust/rust-binaries-all-versions/bin/extracted_32/rust1.64.0.exe"),
+        ("data/language/rust/rust-binaries-all-versions/bin/extracted_32/rust1.66.0.exe"),
+        ("data/language/rust/rust-binaries-all-versions/bin/extracted_32/rust1.68.0.exe"),
+        ("data/language/rust/rust-binaries-all-versions/bin/extracted_32/rust1.70.0.exe"),
+    ],
+)
+def test_language_detection_32(binary_file, extract_files_32):
+    expected_strings = [
+        "the quick brown fox jumps over the lazy dog",
+        "Words in reverse",
+        "Pangram: ",
+        "Used characters: ",
+        "Alice says: ",
+        "Bob says: ",
+    ]
+
+    CD = pathlib.Path(__file__).resolve().parent
+    abs_path = (CD / binary_file).resolve()
+
+    assert abs_path.exists(), f"File {binary_file} does not exist"
+
+    rust_strings = extract_rust_strings(abs_path, 6)
+
+    strings = []
+
+    for rust_string in rust_strings:
+        strings.append(rust_string.string)
+
+    assert all(elem in strings for elem in expected_strings)