add CI tests

ci/run_tests.sh

@@ -59,12 +59,36 @@ pushd with_examples
 popd
 
 pushd many_examples
-"$fpm" build
+
 "$fpm" run --example --all
 test -e demo1.txt
 test -e demo2.txt
 popd
 
+# Test building individual targets 
+pushd many_targets
+cases=( "1" "2" "3" )
+targets=( "run" "example" "test" )
+cmdrun=( "run --target" "run --example" "test --target" )
+for j in {0..2}
+do
+   for i in {0..2}
+   do
+      rm -f *.txt
+      this=${cases[$i]}	
+      others=${cases[@]/$this}
+      filename=${targets[$j]}$this
+      echo "$filename"
+      "$fpm" ${cmdrun[$j]} $filename 
+      test -e $filename.txt
+      for k in ${others[@]}
+      do
+         test ! -e ${targets[$k]}$k.txt   
+      done
+   done
+done
+popd 
+
 pushd auto_discovery_off
 "$fpm" build
 "$fpm" run --target auto_discovery_off