Add test-built task

Author: Mauko Quiroga

tasks/publish.mk

@@ -24,4 +24,6 @@ build:
 
 ## Upload openfisca-core package to PyPi.
 publish:
+	@$(call print_help,$@:)
 	@twine upload dist/* --username $${PYPI_USERNAME} --password $${PYPI_PASSWORD}
+	@$(call print_pass,$@:)

tasks/test_code.mk

@@ -1,3 +1,6 @@
+## The path to the installed packages.
+python_packages = $(shell python -c "import sysconfig; print(sysconfig.get_paths()[\"purelib\"])")
+
 ## Run openfisca-core.
 test-code: test-core
 	@##	Usage:
@@ -13,9 +16,24 @@ test-code: test-core
 	@$(call print_pass,$@:)
 
 ## Run openfisca-core tests.
-test-core: $(shell git ls-files "tests/*.py")
+test-core:
+	@$(call print_help,$@:)
+	@PYTEST_ADDOPTS="\
+		${PYTEST_ADDOPTS} \
+		--cov=src \
+		${pytest_args} \
+		" \
+		openfisca test $(shell find tests -name "*.py") ${openfisca_args}
+	@$(call print_pass,$@:)
+
+## Run openfisca-core tests against the built version.
+test-built:
 	@$(call print_help,$@:)
-	@PYTEST_ADDOPTS="${PYTEST_ADDOPTS} --cov=src ${pytest_args}" \
-		openfisca test $? \
-		${openfisca_args}
+	@PYTEST_ADDOPTS=" \
+		${PYTEST_ADDOPTS} \
+		--cov=${python_packages}/openfisca_core \
+		--cov=${python_packages}/openfisca_web_api \
+		${pytest_args} \
+		" \
+		openfisca test $(shell find tests -name "*.py") ${openfisca_args}
 	@$(call print_pass,$@:)