Jest

I needed to automate the process of running tests in Jest and getting the coverage for a specific file. I created this script to help me with that. #!/bin/bash # Color definitions BLUE='\033[0;34m' GREEN='\033[0;32m' RED='\033[0;31m' YELLOW='\033[1;33m' CYAN='\033[0;36m' NC='\033[0m' # No Color BOLD='\033[1m' # Function to display usage show_usage() { echo -e "${YELLOW}Usage:${NC} $0 [--find-by-name] <relative-file-path> [additional test options]" echo -e "${YELLOW}Examples:${NC}" echo -e " $0 src/components/Button.tsx --watch" echo -e " $0 src/components/Button.tsx --find-by-name --watch" exit 1 } # Initialize variables FIND_BY_NAME=false RELATIVE_FILE_PATH="" # Parse arguments while [[ $# -gt 0 ]]; do case $1 in --find-by-name) FIND_BY_NAME=true shift ;; *) if [ -z "$RELATIVE_FILE_PATH" ]; then RELATIVE_FILE_PATH="$1" else break # Stop parsing and keep remaining args for test options fi shift ;; esac done # Check if a file name is provided if [ -z "$RELATIVE_FILE_PATH" ]; then show_usage fi # Check if the file exists if [ ! -f "$RELATIVE_FILE_PATH" ]; then echo -e "${RED}Error: ${NC}File '${YELLOW}${RELATIVE_FILE_PATH}${NC}' not found. 😕" exit 1 fi FILE_PATH=$(echo "$RELATIVE_FILE_PATH" | cut -d'/' -f3-) # Get just the file name without extension for --find-by-name mode FILE_NAME=$(basename "$RELATIVE_FILE_PATH") FILE_NAME_NO_EXT="${FILE_NAME%.*}" # Construct the corresponding test file path TEST_FILE_NAME="${FILE_PATH%.*}.test" if [ "$FIND_BY_NAME" = true ]; then # Search by file name TEST_PATH=$(find "tests" -type f \( -name "${FILE_NAME_NO_EXT}.test.tsx" -o -name "${FILE_NAME_NO_EXT}.test.ts" \)) else # Original search by path TEST_PATH=$(find "tests" -type f \( -path "*/${TEST_FILE_NAME}.tsx" -o -path "*/${TEST_FILE_NAME}.ts" \)) fi # Check if the test file exists if [ -z "$TEST_PATH" ]; then echo -e "${RED}Error: ${NC}Test file for '${YELLOW}${RELATIVE_FILE_PATH}${NC}' not found in 'tests' directory. 😕" echo -e "Test file name: ${YELLOW}${FILE_NAME_NO_EXT}.test.tsx${NC}" echo -e "${YELLOW}Hint:${NC} If you're looking for a file by name, try using the --find-by-name flag." exit 1 fi # Print test information with styling echo -e "\n${BLUE}╔════════════════════════════════════════════════════════════╗${NC}" echo -e "${GREEN}▶ Running Coverage Test${NC}" echo -e "${CYAN}📁 Source file:${NC} ${RELATIVE_FILE_PATH}" echo -e "${CYAN}🧪 Test file:${NC} ${TEST_PATH}" echo -e "${CYAN}⚙️ Options:${NC} $@" echo -e "${BLUE}╚════════════════════════════════════════════════════════════╝${NC}\n" yarn test "$TEST_PATH" --coverage --collectCoverageFrom="$RELATIVE_FILE_PATH" "$@" Usage Test cases are in the tests folder. The script will search for the test file by path by default, if you want to search by name, you can use the --find-by-name flag. ...