Fixed duplicate requirements if several requires args are specified (PY-10297)

python/openapi/src/com/jetbrains/python/packaging/PyRequirement.java

@@ -288,7 +288,7 @@ public class PyRequirement {
 
   @NotNull
   private static List<PyRequirement> parse(@NotNull String s, @Nullable VirtualFile anchor, @NotNull Set<VirtualFile> visited) {
-    final List<PyRequirement> result = new ArrayList<PyRequirement>();
+    final Set<PyRequirement> result = new LinkedHashSet<PyRequirement>();
     for (String line : StringUtil.splitByLines(s)) {
       final String trimmed = line.trim();
       if (!trimmed.isEmpty()) {
@@ -301,7 +301,7 @@ public class PyRequirement {
         }
       }
     }
-    return result;
+    return new ArrayList<PyRequirement>(result);
   }
 
   @NotNull

python/testData/inspections/PyPackageRequirementsInspection/DuplicateInstallAndTests/setup.py

@@ -0,0 +1,10 @@
+from distutils.core import setup
+
+requires = [
+    'mynose'
+]
+
+setup(name='foo',
+      version=0.1,
+      install_requires=requires,
+      tests_require=requires)

python/testData/inspections/PyPackageRequirementsInspection/DuplicateInstallAndTests/test1.py

@@ -0,0 +1,2 @@
+<warning descr="Package requirement 'mynose' is not satisfied">print("Hello, World!")
+</warning>