remove test.sh and move the command into the Makefile

.drone.yml

@@ -2,6 +2,6 @@ build:
   image: gcc
   commands:
     - make
-    - ./test.sh
+    - make test
   branches:
     - master

.gitlab-ci.yml

@@ -11,4 +11,4 @@ build_job:
 test_job:
   stage: test
   script:
-    - ./test.sh
+    - make test

Makefile

+.PHONY: test
+
 all: main.o
 
 %.o: %.cpp
@@ -5,3 +7,10 @@ all: main.o
 
 clean:
 	-$(RM) *.o
+
+test:
+	cd test && \
+		git submodule init && \
+		git submodule update --depth 1 && \
+		make && \
+		./test.o

README.md

@@ -11,11 +11,11 @@ Just
 make
 ```
 
-# Installation
+# Testing
 
 Just
 ```
-sudo cp -i main.o /usr/bin/hello-ci
+make test
 ```
 
 # FAQ

test.sh

-#!/usr/bin/env sh
-
-cd test
-git submodule init
-git submodule update --depth 1
-make
-./test.o