.travis.yml,ports/unix/Makefile: Add coverage test for script via stdin.

.travis.yml

@@ -58,6 +58,9 @@ script:
   - (cd tests && MICROPY_CPYTHON3=python3.4 MICROPY_MICROPYTHON=../ports/unix/micropython_coverage ./run-tests --emit native)
   - (cd tests && MICROPY_CPYTHON3=python3.4 MICROPY_MICROPYTHON=../ports/unix/micropython_coverage ./run-tests --via-mpy -d basics float)
 
+  # test when input script comes from stdin
+  - cat tests/basics/0prelim.py | ports/unix/micropython_coverage | grep -q 'abc'
+
   # run coveralls coverage analysis (try to, even if some builds/tests failed)
   - (cd ports/unix && coveralls --root ../.. --build-root . --gcov $(which gcov) --gcov-options '\-o build-coverage/' --include py --include extmod)
 

ports/unix/Makefile

@@ -258,6 +258,7 @@ coverage_test: coverage
 	cd $(TOP)/tests && MICROPY_MICROPYTHON=../$(DIRNAME)/micropython_coverage ./run-tests -d thread
 	cd $(TOP)/tests && MICROPY_MICROPYTHON=../$(DIRNAME)/micropython_coverage ./run-tests --emit native
 	cd $(TOP)/tests && MICROPY_MICROPYTHON=../$(DIRNAME)/micropython_coverage ./run-tests --via-mpy -d basics float
+	cat $(TOP)/tests/basics/0prelim.py | ./micropython_coverage | grep -q 'abc'
 	gcov -o build-coverage/py $(TOP)/py/*.c
 	gcov -o build-coverage/extmod $(TOP)/extmod/*.c