Add test for pyproject.toml-style project using setuptools

Author: cjolowicz

test/fixtures/pyproject-toml/pyproject.toml

@@ -0,0 +1,3 @@
+[build-system]
+requires = ["setuptools", "wheel"]
+build-backend = "setuptools.build_meta:__legacy__"

test/fixtures/pyproject-toml/setup.py

@@ -0,0 +1,4 @@
+from setuptools import setup
+
+
+setup(name="foobar", version="1.0.0")

test/run-features

@@ -70,6 +70,11 @@ testPipenvFullVersion() {
   assertCapturedSuccess
 }
 
+testPyProjectToml() {
+    compile "pyproject-toml"
+    assertCapturedSuccess
+}
+
 testPoetry() {
     compile "poetry"
     assertCapturedSuccess