Included a test target in the main Makefile, to run all tests

.travis.yml

@@ -37,4 +37,4 @@ env:
 
 script:
   - (cd example-os && make)
-  - xvfb-run ./test/${MODE}.sh
+  - xvfb-run -a ./test/${MODE}.sh

example-os/Makefile

@@ -1,5 +1,24 @@
+.PHONY: all
 all: os.sh
 
 os.sh: os.asm Makefile
 	nasm -o $@ $<
 	chmod a+x $@
+
+.PHONY: test
+test: test-qemu-system-i386 test-qemu-system-arm test-virtualbox test-bochs
+
+.PHONY: test-qemu-system-i386
+test-qemu-system-i386:
+	(cd .. && xvfb-run -a ./test/qemu-system-i386.sh)
+
+.PHONY: test-qemu-system-arm
+test-qemu-system-arm:
+	(cd .. && xvfb-run -a ./test/qemu-system-arm.sh)
+
+.PHONY: test-virtualbox
+test-virtualbox:
+	(cd .. && xvfb-run -a ./test/virtualbox.sh)
+
+.PHONY: test-bochs
+	(cd .. && xvfb-run -a ./test/bochs.sh)

test/all.sh

@@ -0,0 +1,4 @@
+xvfb-run ./test/qemu-system-i386.sh
+xvfb-run ./test/qemu-system-arm.sh
+xvfb-run ./test/virtualbox.sh
+xvfb-run ./test/bochs.sh