tests/ports/qemu: Add ROMFS tests to CI.

This commit adds a new test to make sure ROMFS files are mounted and
read correctly, to be run as part of the CI process.

The changes also include the source binary files that have been used to
create the pre-baked ROMFS partition image used in the test, along with
a Makefile to allow recreating said file.

The CI test ROMFS image is mounted only if no other ROMFS partition is
mounted in slot 0.  The specific test is executed only if there actually
is a ROMFS partition mounted and if the partition is identified as the
one used to run tests on.  This allows for user images to be mounted and
for a successful test run if that is the case.

Signed-off-by: Alessandro Gatti <a.gatti@frob.it>

Author: agatti

.gitattributes

@@ -14,6 +14,7 @@
 *.dxf binary
 *.mpy binary
 *.der binary
+*.bin binary
 
 # These should also not be modified by git.
 tests/basics/string_cr_conversion.py -text

ports/qemu/Makefile

@@ -220,6 +220,16 @@ CFLAGS += $(SPECS_FRAGMENT)
 LDFLAGS += $(SPECS_FRAGMENT)
 endif
 
+# Mount the ROMFS test image only if no other ROMFS partition has been mounted on slot 0.
+
+ROMFS_TEST_IMAGE = assets/random_romfs.bin
+
+ifneq ($(MICROPY_HW_ROMFS_PART0_START),)
+ifeq ($(QEMU_ROMFS_IMG0),)
+QEMU_ARGS += -device loader,file=$(ROMFS_TEST_IMAGE),addr=$(MICROPY_HW_ROMFS_PART0_START),force-raw=on
+endif
+endif
+
 RUN_TESTS_FULL_ARGS = -t execpty:"$(QEMU_SYSTEM) $(QEMU_ARGS) -serial pty -kernel ../ports/qemu/$<" $(RUN_TESTS_ARGS)
 
 ################################################################################

tests/assets/Makefile

@@ -0,0 +1,29 @@
+MPY_DIR = ../..
+
+PYTHON := $(command -v python3 2> /dev/null)
+ifndef PYTHON
+PYTHON = python
+endif
+
+# Files created with dd if=/dev/urandom ... - the file name is the CRC32
+# of the data contained in the file itself.
+
+ROMFS_FILES = romfs_source/0x30d83fe5.bin \
+	      romfs_source/0x37bef0eb.bin \
+	      romfs_source/0x442f3b5f.bin \
+	      romfs_source/0x648793fb.bin \
+	      romfs_source/0x913837b6.bin \
+	      romfs_source/0xdb14aac7.bin \
+	      romfs_source/romfs_sentinel.txt
+
+.PHONY: romfs
+romfs: all
+
+.PHONY: clean
+clean:
+	rm -f random_romfs.bin
+
+all: random_romfs.bin
+
+random_romfs.bin: $(ROMFS_FILES)
+	$(PYTHON) $(MPY_DIR)/tools/mpremote/mpremote.py romfs --partition 0 --no-mpy --output $@ build romfs_source

tests/assets/README.md

@@ -1,2 +1,8 @@
-This is a .mpy built against the current .mpy version that can be used to test
-freezing without a dependency on mpy-cross.
+This directory contains assets for other tests to use:
+
+- A .mpy built against the current .mpy version that can be used to test
+  freezing without a dependency on mpy-cross (`frozentest.py` and
+  `frozentest.mpy`)
+- A ROMFS image containing random binary files for testing mounting and reading
+  from the partition without having to generate a custom image
+  (`random_romfs.bin`, the `romfs_source` directory, and `Makefile`)