windows: Run tests via Makefile.

The application isn't necessarily called 'micropython' especially
not When using variants, i.e. the tests need to be ran using $(PROG).

ports/windows/.appveyor.yml

@@ -67,17 +67,8 @@ after_test:
     if ($LASTEXITCODE -ne 0) {
       throw "$env:MSYSTEM mpy_cross build exited with code $LASTEXITCODE"
     }
-    cd (Join-Path $env:APPVEYOR_BUILD_FOLDER 'tests')
-    $testArgs = @('run-tests.py')
-    foreach ($skipTest in @('math_fun', 'float2int_double', 'float_parse', 'math_domain_special')) {
-      $testArgs = $testArgs + '-e' + $skipTest
-    }
-    & $env:MICROPY_CPYTHON3 $testArgs
-    if ($LASTEXITCODE -ne 0) {
-      & $env:MICROPY_CPYTHON3 run-tests.py --print-failures
-      throw "Test failure"
-    }
-    & $env:MICROPY_CPYTHON3 ($testArgs + @('--via-mpy', '-d', 'basics', 'float', 'micropython'))
+    cd (Join-Path $env:APPVEYOR_BUILD_FOLDER 'ports/windows')
+    C:\msys64\usr\bin\bash.exe -l -c "make V=1 test_full"
     if ($LASTEXITCODE -ne 0) {
       & $env:MICROPY_CPYTHON3 run-tests.py --print-failures
       throw "Test failure"

ports/windows/Makefile

@@ -81,3 +81,15 @@ CFLAGS += -DMICROPY_QSTR_EXTRA_POOL=mp_qstr_frozen_const_pool -DMICROPY_MODULE_F
 endif
 
 include $(TOP)/py/mkrules.mk
+
+.PHONY: test test_full
+
+RUN_TESTS_SKIP += -e math_fun -e float2int_double -e float_parse -e math_domain_special
+
+test: $(PROG) $(TOP)/tests/run-tests.py
+	$(eval DIRNAME=ports/$(notdir $(CURDIR)))
+	cd $(TOP)/tests && MICROPY_MICROPYTHON=../$(DIRNAME)/$(PROG) $(PYTHON) ./run-tests.py $(RUN_TESTS_SKIP)
+
+test_full: test
+	$(eval DIRNAME=ports/$(notdir $(CURDIR)))
+	cd $(TOP)/tests && MICROPY_MICROPYTHON=../$(DIRNAME)/$(PROG) $(PYTHON) ./run-tests.py --via-mpy $(RUN_TESTS_MPY_CROSS_FLAGS) $(RUN_TESTS_SKIP) -d basics float micropython