fix: [#5] Add unit testing

.gitignore

@@ -1,3 +1,6 @@
 .task
 .vscode
+coverage.html
+functioncoverage.out
+profile.cov
 reports

.golangci.yml

@@ -130,6 +130,7 @@ linters:
     - nilnil
     - nlreturn
     - paralleltest
+    - testpackage
     - varnamelen
     - wsl
 

README.md

@@ -21,7 +21,7 @@ fashion.
 
 ## Example configuration file
 
-```YAML
+```yml
 module: "github.com/wimspaargaren/prolayout"
 root:
   - name: "cmd"
@@ -35,3 +35,5 @@ root:
     files:
       - name: ".*_test.go"
 ```
+
+and run `prolayout ./...`

internal/analyzer/analyzer.go

@@ -69,6 +69,9 @@ func (r *runner) assessDir(pass *analysis.Pass) (*model.Dir, error) {
 		if err != nil {
 			return nil, err
 		}
+		// if len(pass.Files) == 0 {
+		// 	continue
+		// }
 		if !ok {
 			pass.ReportRangef(pass.Files[0], "package not allowed: %s, %s not found in allowed names: [%s]", packagePathWithoutModule, folder, strings.Join(dirsNames(dirs), ","))
 			break

internal/analyzer/analyzer_test.go

@@ -0,0 +1 @@
+package analyzer

main.go

@@ -2,8 +2,10 @@
 package main
 
 import (
+	"fmt"
 	"log"
 	"os"
+	"path/filepath"
 
 	"golang.org/x/tools/go/analysis/singlechecker"
 	"gopkg.in/yaml.v3"
@@ -12,15 +14,27 @@ import (
 	"github.com/wimspaargaren/prolayout/internal/model"
 )
 
-func main() {
-	data, err := os.ReadFile(".prolayout.yml")
+const proLayoutFile = ".prolayout.yml"
+
+func readAndUnmarshalProLayoutYML(proLayoutFile string) (*model.Root, error) {
+	data, err := os.ReadFile(filepath.Clean(proLayoutFile))
 	if err != nil {
-		log.Fatalf("error: %v", err)
+		return nil, fmt.Errorf("'%w'", err)
 	}
 	t := model.Root{}
 	err = yaml.Unmarshal(data, &t)
 	if err != nil {
-		log.Fatalf("error: %v", err)
+		return nil, fmt.Errorf("'%w'", err)
 	}
-	singlechecker.Main(analyzer.New(t))
+
+	return &t, nil
+}
+
+func main() {
+	unmarshalledProLayoutYML, err := readAndUnmarshalProLayoutYML(proLayoutFile)
+	if err != nil {
+		log.Fatalf("failed to unmarshal '%s': '%v'", proLayoutFile, err)
+	}
+
+	singlechecker.Main(analyzer.New(*unmarshalledProLayoutYML))
 }

main_test.go

@@ -0,0 +1,24 @@
+package main
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
+	"github.com/wimspaargaren/prolayout/internal/model"
+)
+
+func TestReadAndUnmarshalProLayoutYML(t *testing.T) {
+	exp := model.Root{
+		Module: "github.com/wimspaargaren/prolayout",
+		Root:   []*model.Dir{{Name: "bar"}},
+	}
+	act, err := readAndUnmarshalProLayoutYML(proLayoutFile)
+	require.NoError(t, err)
+	assert.Equal(t, exp, *act)
+
+	act, err = readAndUnmarshalProLayoutYML(proLayoutFile + "does-not-exist")
+	require.Empty(t, act)
+	assert.EqualError(t, err, "'open .prolayout.ymldoes-not-exist: no such file or directory'")
+}