psutil: move to Python 3.9, add TEST(). (#8172)

Package is non-functional: on both 3.7 and 3.9 it gives an error
when trying to "import psutil".

The patchset is WIP, so attempting to update to psutil 5.9.4 won't
do much.

Still, moving away from 3.7 makes sense.

dev-python/psutil/psutil-5.6.7.recipe

@@ -33,24 +33,31 @@ BUILD_PREREQUIRES="
 	cmd:gcc$secondaryArchSuffix
 	"
 
-PYTHON_PACKAGES=(python3)
-PYTHON_VERSIONS=(3.7)
+PYTHON_PACKAGES=(python39)
+PYTHON_VERSIONS=(3.9)
 for i in "${!PYTHON_PACKAGES[@]}"; do
-pythonPackage=${PYTHON_PACKAGES[i]}
-pythonVersion=${PYTHON_VERSIONS[$i]}
-eval "PROVIDES_${pythonPackage}=\"\
-	${portName}_$pythonPackage = $portVersion\
-	\"; \
-REQUIRES_$pythonPackage=\"\
-	haiku$secondaryArchSuffix\n\
-	cmd:python$pythonVersion\
-	\""
-BUILD_REQUIRES="$BUILD_REQUIRES
-	setuptools_$pythonPackage"
-BUILD_PREREQUIRES="$BUILD_PREREQUIRES
-	cmd:python$pythonVersion"
+	pythonPackage=${PYTHON_PACKAGES[i]}
+	pythonVersion=${PYTHON_VERSIONS[$i]}
+
+	eval "PROVIDES_${pythonPackage}=\"
+		${portName}_$pythonPackage = $portVersion
+		\""
+	eval "REQUIRES_$pythonPackage=\"
+		haiku$secondaryArchSuffix
+		cmd:python$pythonVersion
+		\""
+	BUILD_REQUIRES+="
+		setuptools_$pythonPackage
+		"
+	BUILD_PREREQUIRES+="
+		cmd:python$pythonVersion
+		"
+	TEST_REQUIRES+="
+		cmd:make
+		"
 done
 
+
 INSTALL()
 {
 	for i in "${!PYTHON_PACKAGES[@]}"; do
@@ -60,8 +67,10 @@ INSTALL()
 		python=python$pythonVersion
 		installLocation=$prefix/lib/$python/vendor-packages/
 		export PYTHONPATH=$installLocation:$PYTHONPATH
+
 		mkdir -p $installLocation
 		rm -rf build
+
 		$python setup.py build install \
 			--root=/ --prefix=$prefix
 
@@ -69,3 +78,18 @@ INSTALL()
 			$prefix/lib/python*
 	done
 }
+
+
+TEST()
+{
+	for i in "${!PYTHON_PACKAGES[@]}"; do
+		pythonPackage=${PYTHON_PACKAGES[i]}
+		pythonVersion=${PYTHON_VERSIONS[$i]}
+
+		python=python$pythonVersion
+		installLocation=$prefix/lib/$python/vendor-packages/
+		export PYTHONPATH=$installLocation:$PYTHONPATH
+
+		make test PYTHON=$python
+	done
+}