TestingCmd.md

Testing Commands for MiniShell

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1. Basic Commands

ls
pwd
whoami
date

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2. Input and Output Redirection

Input Redirection:

cat < input.txt

Output Redirection:

echo "Hello, MiniShell!" > output.txt
cat output.txt

Combined Input and Output Redirection:

grep "pattern" < input.txt > output.txt

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3. Pipelines

Run commands connected by pipelines to ensure proper execution:

ls -l | grep ".c" | wc -l
cat input.txt | sort | uniq

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4. Background Processes

Run commands in the background and manage them:

sleep 10 &

List Jobs:

jobs

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5. Job Control

Bring a Background Job to Foreground:

fg <job_id>

Stop a Job:

Run a command, then press Ctrl+Z to stop it. Verify with:

jobs

Resume a Job in the Background:

bg <job_id>

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6. Signal Handling

Interrupt a Command (Ctrl+C):

Run a long-running command, e.g.,

sleep 30

Press Ctrl+C to terminate it.

Stop a Command (Ctrl+Z):

Run a command, e.g.,

sleep 30

Press Ctrl+Z to stop and move it to the background.

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7. Edge Cases

Empty Command:

Press Enter without typing anything.

Invalid Command:

nonexistent_command

Pipe with No Following Command:

ls |

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8. Custom Commands

Change Directory:

cd /
pwd
cd ..
pwd

Exit MiniShell:

exit

List Jobs:

jobs

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9. Redirection Errors

Test invalid redirections to ensure error handling:

cat < nonexistent_file
echo "Test" > /

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10. Automated Testing

Test Script:

#!/bin/bash

echo "Testing MiniShell"

echo "1. Basic Commands"
ls
pwd

echo "2. Input Redirection"
echo "Hello World" > test_input.txt
cat < test_input.txt

echo "3. Output Redirection"
echo "Test Output" > test_output.txt
cat test_output.txt

echo "4. Pipelines"
ls | grep ".c" | wc -l

echo "5. Background Processes"
sleep 5 &

echo "6. Job Control"
sleep 30 &
jobs

Run the Test Script:

./test_script.sh