Fix failing tests

tests/test_cli_compile.py

@@ -39,17 +39,8 @@ def test_command_line_overrides_pip_conf(pip_with_index_conf, runner):
     assert "Using indexes:\n  http://override.com" in out.stderr
 
 
-def test_command_line_setuptools_read(make_pip_conf, runner):
-    make_pip_conf(
-        dedent(
-            f"""\
-            [global]
-            disable-pip-version-check = True
-            find-links = {MINIMAL_WHEELS_PATH}
-            """
-        )
-    )
-
+@pytest.mark.network
+def test_command_line_setuptools_read(runner):
     with open("setup.py", "w") as package:
         package.write(
             dedent(
@@ -62,16 +53,13 @@ def test_command_line_setuptools_read(make_pip_conf, runner):
                 """
             )
         )
-    out = runner.invoke(cli, ["--no-emit-find-links"])
+    out = runner.invoke(
+        cli,
+        ["--no-header", "--no-emit-find-links", "--find-links", MINIMAL_WHEELS_PATH],
+    )
 
     assert out.stderr == dedent(
         """\
-        #
-        # This file is autogenerated by pip-compile
-        # To update, run:
-        #
-        #    pip-compile --no-emit-find-links
-        #
         small-fake-a==0.1
             # via fake-setuptools-a (setup.py)
         """
@@ -81,6 +69,7 @@ def test_command_line_setuptools_read(make_pip_conf, runner):
     assert os.path.exists("requirements.txt")
 
 
+@pytest.mark.network
 @pytest.mark.parametrize(
     ("options", "expected_output_file"),
     (
@@ -96,20 +85,10 @@ def test_command_line_setuptools_read(make_pip_conf, runner):
         (["setup.py", "--output-file", "output.txt"], "output.txt"),
     ),
 )
-def test_command_line_setuptools_output_file(
-    make_pip_conf, runner, options, expected_output_file
-):
+def test_command_line_setuptools_output_file(runner, options, expected_output_file):
     """
     Test the output files for setup.py as a requirement file.
     """
-    make_pip_conf(
-        dedent(
-            f"""\
-            [global]
-            find-links = {MINIMAL_WHEELS_PATH}
-            """
-        )
-    )
 
     with open("setup.py", "w") as package:
         package.write(
@@ -126,7 +105,8 @@ def test_command_line_setuptools_output_file(
     assert os.path.exists(expected_output_file)
 
 
-def test_command_line_setuptools_nested_output_file(pip_conf, tmpdir, runner):
+@pytest.mark.network
+def test_command_line_setuptools_nested_output_file(tmpdir, runner):
     """
     Test the output file for setup.py in nested folder as a requirement file.
     """
@@ -147,6 +127,34 @@ def test_command_line_setuptools_nested_output_file(pip_conf, tmpdir, runner):
     assert (proj_dir / "requirements.txt").exists()
 
 
+@pytest.mark.network
+def test_setuptools_preserves_environment_markers(
+    runner, make_package, make_wheel, tmpdir
+):
+    dists_dir = tmpdir / "dists"
+
+    foo_dir = make_package(name="foo", version="1.0")
+    make_wheel(foo_dir, dists_dir)
+
+    bar_dir = make_package(
+        name="bar", version="2.0", install_requires=['foo ; python_version >= "1"']
+    )
+    out = runner.invoke(
+        cli,
+        [
+            str(bar_dir / "setup.py"),
+            "--no-header",
+            "--no-annotate",
+            "--no-emit-find-links",
+            "--find-links",
+            str(dists_dir),
+        ],
+    )
+
+    assert out.exit_code == 0, out.stderr
+    assert out.stderr == 'foo==1.0 ; python_version >= "1"\n'
+
+
 def test_find_links_option(runner):
     with open("requirements.in", "w") as req_in:
         req_in.write("-f ./libs3")