Gh 16 add test coverage reporting (#19)

* add code coverage reporting
* added testcov badge

.github/workflows/test.yml

@@ -0,0 +1,38 @@
+name: Run tests and upload coverage
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+permissions:
+  contents: read
+
+jobs:
+  test:
+    name: Run tests and collect coverage
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: '1.21'
+
+      - name: Install dependencies
+        run: go mod download
+
+      - name: Run tests
+        run: go test ./... -coverprofile=coverage.txt -covermode=atomic
+
+      - name: Upload results to Codecov
+        uses: codecov/codecov-action@v5
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          file: coverage.txt
+          fail_ci_if_error: true

README.md

@@ -1,7 +1,9 @@
 # FileFusion
 
-FileFusion is a powerful file concatenation tool designed specifically for Large Language Model (LLM) applications. 
-It combines multiple files into a single structured output file while preserving metadata 
+[![Test Coverage](https://codecov.io/gh/drgsn/filefusion/branch/main/graph/badge.svg)](https://codecov.io/gh/drgsn/filefusion)
+
+FileFusion is a powerful file concatenation tool designed specifically for Large Language Model (LLM) applications.
+It combines multiple files into a single structured output file while preserving metadata
 and maintaining a format that's optimal for LLM processing.
 
 ## Features
@@ -30,7 +32,7 @@ filefusion [flags]
 
 - `-i, --input`: Input directory path (default: current directory)
 - `-o, --output`: Output file path (default: output.xml)
-- `-p, --pattern`: Comma-separated file patterns (default: "*.go,*.json,*.yaml,*.yml")
+- `-p, --pattern`: Comma-separated file patterns (default: "_.go,_.json,_.yaml,_.yml")
 - `-e, --exclude`: Comma-separated patterns to exclude
 - `--max-size`: Maximum size of the output file (default: 10MB)
 
@@ -39,45 +41,53 @@ filefusion [flags]
 ### Basic Usage
 
 1. Process all Go files in the current directory:
+
 ```bash
 filefusion -p "*.go"
 ```
 
 2. Process multiple file types:
+
 ```bash
 filefusion -p "*.go,*.js,*.py" -o output.xml
 ```
 
 3. Process files from a specific directory:
+
 ```bash
 filefusion -i /path/to/project -p "*.go"
 ```
 
 ### Output Formats
 
 1. Generate XML output (default):
+
 ```bash
 filefusion -p "*.go" -o output.xml
 ```
 
 2. Generate JSON output:
+
 ```bash
 filefusion -p "*.go" -o output.json
 ```
 
 3. Generate YAML output:
+
 ```bash
 filefusion -p "*.go" -o output.yaml
 ```
 
 ### File Size Limits
 
 1. Set a 5MB limit for the output file:
+
 ```bash
 filefusion -p "*.go" --max-size 5MB
 ```
 
 2. Use different size units:
+
 ```bash
 filefusion -p "*.go" --max-size 500KB
 filefusion -p "*.go" --max-size 1GB
@@ -86,29 +96,33 @@ filefusion -p "*.go" --max-size 1GB
 ### Exclusion Patterns
 
 1. Exclude specific directories:
+
 ```bash
 filefusion -p "*.go" -e "vendor/**,build/**"
 ```
 
 2. Exclude specific files:
+
 ```bash
 filefusion -p "*.go" -e "*_test.go"
 ```
 
 3. Complex exclusion patterns:
+
 ```bash
 filefusion -p "*.go,*.js" -e "vendor/**,**/*_test.go,**/node_modules/**"
 ```
 
 ## Output Format Examples
 
 ### XML Output
+
 ```xml
 <documents>
   <document index="1">
     <source>main.go</source>
     <document_content>package main
-    
+
 func main() {
     // ...
 }</document_content>
@@ -118,6 +132,7 @@ func main() {
 ```
 
 ### JSON Output
+
 ```json
 {
   "documents": [
@@ -131,13 +146,14 @@ func main() {
 ```
 
 ### YAML Output
+
 ```yaml
 documents:
   - index: 1
     source: main.go
     document_content: |
       package main
-      
+
       func main() {
           // ...
       }
@@ -146,13 +162,15 @@ documents:
 ## Size Units
 
 The `--max-size` flag supports the following units:
+
 - B (Bytes)
 - KB (Kilobytes)
 - MB (Megabytes)
 - GB (Gigabytes)
 - TB (Terabytes)
 
 Examples:
+
 - `--max-size 500B`
 - `--max-size 1KB`
 - `--max-size 10MB`
@@ -161,6 +179,7 @@ Examples:
 ## File Pattern Syntax
 
 FileFusion uses standard glob patterns:
+
 - `*`: Matches any sequence of characters except path separators
 - `**`: Matches any sequence of characters including path separators (for directory exclusions)
 - `?`: Matches any single character
@@ -170,6 +189,7 @@ FileFusion uses standard glob patterns:
 ## Error Handling
 
 FileFusion provides clear error messages for common issues:
+
 - File size exceeding limits
 - Invalid patterns
 - Missing files
@@ -178,4 +198,4 @@ FileFusion provides clear error messages for common issues:
 
 ## Contributing
 
-Contributions are welcome! Please feel free to submit a Pull Request.
+Contributions are welcome! Please feel free to submit a Pull Request.