fix tests and potential race condition

hound.go

@@ -51,6 +51,8 @@ func (h *Hound) Parse(data []byte) error {
 // Sniff matches the passed git-diff hunk against all regexp patterns that
 // were parsed from the local configuration.
 func (h *Hound) Sniff(fileName string, hunk *diff.Hunk, warnc chan string, failc chan error, donec chan bool) {
+	defer func() { donec <- true }()
+
 	r1, _ := regexp.Compile(`^\w+\/`)
 	fileName = r1.ReplaceAllString(fileName, "")
 	if _, ok := h.MatchPatterns(h.Skips, []byte(fileName)); ok {
@@ -75,11 +77,8 @@ func (h *Hound) Sniff(fileName string, hunk *diff.Hunk, warnc chan string, failc
 				"Failure: pattern `%s` match found for `%s` starting at line %d in %s\n",
 				pattern, line, hunk.NewStartLine, fileName))
 			failc <- errors.New(msg)
-			return
 		}
 	}
-
-	donec <- true
 }
 
 // Match matches a byte array against a regexp pattern and returns a bool.

hound_test.go

@@ -6,13 +6,6 @@ import (
 )
 
 func TestDiffs(t *testing.T) {
-	var fileName string
-	var hunk *diff.Hunk
-
-	warnc := make(chan string)
-	failc := make(chan error)
-	donec := make(chan bool)
-
 	hound := &Hound{}
 	config := []byte(`
 warn:
@@ -27,12 +20,16 @@ fail:
 
 	// Should fail
 	{
-		fileName, hunk = getDiff(`diff --git a/test1.go b/test1.go
+		fileName, hunk := getDiff(`diff --git a/test1.go b/test1.go
 index 000000..000000 000000
 --- a/test1.go
 +++ b/test1.go
 @@ -1,2 +3,4 @@
 +Password: something-secret`)
+		warnc := make(chan string)
+		failc := make(chan error)
+		donec := make(chan bool)
+
 		go hound.Sniff(fileName, hunk, warnc, failc, donec)
 
 		select {
@@ -47,12 +44,16 @@ index 000000..000000 000000
 
 	// Should pass but output warning
 	{
-		fileName, hunk = getDiff(`diff --git a/test2.go b/test2.go
+		fileName, hunk := getDiff(`diff --git a/test2.go b/test2.go
 index 000000..000000 000000
 --- a/test2.go
 +++ b/test2.go
 @@ -1,2 +3,4 @@
 +Username: something-secret`)
+		warnc := make(chan string)
+		failc := make(chan error)
+		donec := make(chan bool)
+
 		go hound.Sniff(fileName, hunk, warnc, failc, donec)
 
 		select {
@@ -67,12 +68,16 @@ index 000000..000000 000000
 
 	// Should pass
 	{
-		fileName, hunk = getDiff(`diff --git a/test3.go b/test3.go
+		fileName, hunk := getDiff(`diff --git a/test3.go b/test3.go
 index 000000..000000 000000
 --- a/test3.go
 +++ b/test3.go
 @@ -1,2 +3,4 @@
 +Something that is okay to commit`)
+		warnc := make(chan string)
+		failc := make(chan error)
+		donec := make(chan bool)
+
 		go hound.Sniff(fileName, hunk, warnc, failc, donec)
 
 		select {
@@ -87,12 +92,16 @@ index 000000..000000 000000
 
 	// Should only pay attention to added lines and pass
 	{
-		fileName, hunk = getDiff(`diff --git a/test4.go b/test4.go
+		fileName, hunk := getDiff(`diff --git a/test4.go b/test4.go
 index 000000..000000 000000
 --- a/test4.go
 +++ b/test4.go
 @@ -1,2 +3,4 @@
 -Password: something-secret`)
+		warnc := make(chan string)
+		failc := make(chan error)
+		donec := make(chan bool)
+
 		go hound.Sniff(fileName, hunk, warnc, failc, donec)
 
 		select {

main.go

@@ -37,6 +37,8 @@ func main() {
 		}
 
 		hunkCount := 0
+		errCount := 0
+
 		warnc := make(chan string)
 		failc := make(chan error)
 		donec := make(chan bool)
@@ -57,11 +59,16 @@ func main() {
 				fmt.Print(msg)
 			case err := <-failc:
 				fmt.Print(err)
-				os.Exit(1)
+				errCount++
 			case <-donec:
 				c++
 			}
 		}
+
+		if errCount > 0 {
+			fmt.Printf("%d failures detected. Please fix them before you can commit.\n", errCount)
+			os.Exit(1)
+		}
 	}
 
 	out, code := git.Exec(flag.Args()...)