fix(in-back-ground): fixing the test ang improving subject

sh/tests/facts

@@ -1,23 +0,0 @@
-10 random facts
-
-- Avocados are a fruit, not a vegetable. They're technically considered a single-seeded berry, believe it or not.
-
-- The Eiffel Tower can be 15 cm taller during the summer, due to thermal expansion meaning the iron heats up, the particles gain kinetic energy and take up more space.
-
-- Trypophobia is the fear of closely-packed holes. Or more specifically, "an aversion to the sight of irregular patterns or clusters of small holes or bumps." No crumpets for them, then.
-
-- Australia is wider than the moon. The moon sits at 3400km in diameter, while Australia’s diameter from east to west is almost 4000km.
-
-  EOF
-
-- 'Mellifluous' is a sound that is pleasingly smooth and musical to hear.
-
-- The Spice Girls were originally a band called Touch. "When we first started [with the name Touch], we were pretty bland," Mel C told The Guardian in 2018. "We felt like we had to fit into a mould."
-
-- Human teeth are the only part of the body that cannot heal themselves. Teeth are coated in enamel which is not a living tissue.
-
-- It's illegal to own just one guinea pig in Switzerland. It's considered animal abuse because they're social beings and get lonely.
-
-- The Ancient Romans used to drop a piece of toast into their wine for good health - hence why we 'raise a toast'.
-
-- The heart of a shrimp is located in its head. They also have an open circulatory system, which means they have no arteries and their organs float directly in blood.

sh/tests/in-back-ground_test.sh

@@ -7,31 +7,20 @@ IFS='
 
 FILENAME="student/in-back-ground.sh"
 script_dirS=$(cd -P "$(dirname "$BASH_SOURCE")" &>/dev/null && pwd)
+echo "- Australia is wider than the moon. The moon sits at 3400km in diameter, while Australia's diameter from east to west is almost 4000km." >facts
 
 challenge() {
     submitted=$(cd "$1" && bash "$script_dirS"/$FILENAME)
     expected=$(cd "$1" && bash "$script_dirS"/solutions/in-back-ground.sh)
     diff <(echo "$submitted") <(echo "$expected")
-    if [ -s ${sol-output.log && output.log} ]; then
-        diff sol-output.log output.log
-    fi
 }
 
-# True if FILE exists and is a regular file
-if [ -f ${FILENAME} ]; then
-    # FILE exists and it's not empty
-    if [ -s ${FILENAME} ]; then
-        challenge .
+challenge .
 
-        # This will faill the grep command
-        sed -i 's/moon/sun/g' facts
-        challenge .
-        sed -i 's/sun/moon/g' facts
-    else
-        echo "The file exist but is empty"
-        exit 1
-    fi
-else
-    echo "File does not exist"
-    exit 1
+echo "The sun is a star!" >facts
+challenge .
+
+if [ -f sol-output ] && [ -f output ]; then
+    diff sol-output output
+    rm sol-output output
 fi

sh/tests/solutions/in-back-ground.sh

@@ -1 +1 @@
-nohup cat facts | grep "moon" && echo "The moon fact was found!" >sol-output.log 2>&1 &
+nohup cat facts | grep "moon" && echo "The moon fact was found!" >sol-output &

subjects/devops/in-back-ground/README.md

@@ -6,10 +6,9 @@ Create a script `in-back-ground.sh` which will execute a job in the background t
 
 - Run the command `cat` on the file "facts" which will read the contents of the file and print it to `stdout`.
 - The output of the cat command will be piped to the `grep` command, which will search for the string `"moon"` in the file.
-- If the `grep` command succeeds ( if it finds the string "moon"), the echo command will run and print `"The moon fact was found!"` to the `output.log` file.
+- If the `grep` command succeeds (if it finds the string "moon"), the echo command will run and print `"The moon fact was found!"` to the `output` file.
 - If the command finds the string "moon", it will print the matching line to the `stdout`.
-- Redirect the `stdout` to a new file `output.log`.
-- Redirect `stderr` to the same place as `stdout` (in this case, the output.log file).
+- Redirect the `stdout` to a new file `output`.
 
 You must do all these steps running only one job and using the command `nohup`!
 
@@ -18,11 +17,17 @@ Expected output:
 ```console
 $ ./in-back-ground.sh
 nohup: redirecting stderr to stdout
-- Australia is wider than the moon. The moon sits at 3400km in diameter, while Australia’s diameter from east to west is almost 4000km.
+- Australia is wider than the moon. The moon sits at 3400km in diameter, while Australia's diameter from east to west is almost 4000km.
 $ ls
-facts in-back-ground.sh output.log
-$ cat output.log
+facts in-back-ground.sh output
+$ cat output
 The moon fact was found!
+./in-back-ground.sh
+nohup: redirecting stderr to stdout
+$ ls
+facts in-back-ground.sh
+$ cat output
+cat: output: No such file or directory
 $
 ```
 
@@ -46,7 +51,5 @@ In a Unix-like shell, stdin, stdout, and stderr are three standard streams that
 
 - `stderr` (standard error) is a stream of data that a program or process writes to for error messages and other diagnostic output. It can also be redirected to write to a file or to the input of another command using the `2>` operator.
 
-- You can use `2>&1` to redirect the `stderr` to the `stdout` current location.
-
 > You have to use Man or Google to know more about commands flags, in order to solve this exercise!
 > Google and Man will be your friends!