Split Docker make targets

add run tests script

Makefile

@@ -1,4 +1,4 @@
-.PHONY : all clean build runonly run docker
+.PHONY : all clean build runonly run docker dockerbuild dockerclean
 
 project_name = nasm-test
 image_name = debasm
@@ -17,6 +17,11 @@ runonly:
 
 run: | all runonly
 
-docker:
+dockerbuild:
 	@docker build -t $(image_name) --compress .;
+
+docker: dockerbuild
 	@docker run --rm $(image_name);
+
+dockerclean:
+	@docker rmi $(image_name);

test/run-tests.sh

@@ -0,0 +1,34 @@
+#!/usr/bin/env bash
+
+pushd $(dirname $0) >/dev/null
+script_path=$PWD
+parent_path=$(dirname $script_path)
+popd >/dev/null
+
+pushd ${parent_path} >/dev/null
+
+echo "Building test environment..."
+
+make dockerbuild
+
+echo "Running tests..."
+
+makefile_output=$(make docker 2>dev/null)
+
+echo "Test results..."
+
+exit_code=1
+if [ $? = 0 ] && echo "$makefile_output" | egrep -q '^Hello world$'; then
+    printf "[\x1b[32m✔\x1b[0m] Test: Hello world\n"
+    exit_code=0
+else
+    printf "[\x1b[31m✘\x1b[0m] Test: Hello world\n"
+fi
+
+echo "Cleaning up Docker image"
+
+make dockerclean
+
+popd >/dev/null
+
+exit $exit_code