FindPython: migrate tests to RunCMake framework

Tests/RunCMake/FindPython/PyPy.cmake

@@ -0,0 +1,43 @@
+enable_language(C)
+
+set (${PYTHON}_FIND_IMPLEMENTATIONS PyPy)
+
+if(PYTHON STREQUAL "Python")
+  set(PyPy_VERSION "PyPy ${Python_REQUESTED_VERSION}")
+elseif(PYTHON STREQUAL "Python2")
+  set(PyPy_VERSION "PyPy2")
+else()
+  set(PyPy_VERSION "PyPy3")
+endif()
+
+find_package(${PYTHON} ${Python_REQUESTED_VERSION} COMPONENTS Interpreter Development)
+if (NOT ${PYTHON}_FOUND)
+  message (FATAL_ERROR "Failed to find Python ${PyPy_VERSION}")
+endif()
+
+if (NOT ${PYTHON}_Interpreter_FOUND)
+  message (FATAL_ERROR "Failed to find Python ${PyPy_VERSION} Interpreter")
+endif()
+if (NOT ${PYTHON}_INTERPRETER_ID STREQUAL "PyPy")
+  message (FATAL_ERROR "Erroneous interpreter ID (${${PYTHON}_INTERPRETER_ID})")
+endif()
+
+if (NOT ${PYTHON}_Development.Module_FOUND)
+  message (FATAL_ERROR "Failed to find Python ${PyPy_VERSION} Development.Module")
+endif()
+if (NOT ${PYTHON}_Development.Embed_FOUND)
+  message (FATAL_ERROR "Failed to find Python ${PyPy_VERSION} Development.Embed")
+endif()
+if (NOT ${PYTHON}_Development_FOUND)
+  message (FATAL_ERROR "Failed to find Python ${PyPy_VERSION} Development")
+endif()
+
+if(NOT TARGET ${PYTHON}::Interpreter)
+  message(SEND_ERROR "${PYTHON}::Interpreter not found")
+endif()
+if(NOT TARGET ${PYTHON}::Module)
+  message(SEND_ERROR "${PYTHON}::Module not found")
+endif()
+if(NOT TARGET ${PYTHON}::Python)
+  message(SEND_ERROR "${PYTHON}::Python not found")
+endif()