11 files changed, 30 insertions, 1 deletions
diff --git a/internal/pipeline/put.go b/internal/pipeline/put.go
index 647b7a9..7b292b9 100644
--- a/internal/pipeline/put.go
+++ b/internal/pipeline/put.go
@@ -23,6 +23,8 @@ func (w NullWriter) Write(p []byte) (n int, err error) {
 
 type fileWalk chan string
 
+// Walk sends the path of all files to the channel, with the exception of
+// any file or directory which starts with "."
 func (f fileWalk) Walk(path string, info os.FileInfo, err error) error {
 	if err != nil {
 		return err
@@ -38,6 +40,8 @@ func (f fileWalk) Walk(path string, info os.FileInfo, err error) error {
 	return nil
 }
 
+// CheckImages checks that all files in a directory are images
+// that can be decoded (skipping dotfiles)
 func CheckImages(dir string) error {
 	checker := make(fileWalk)
 	go func() {
@@ -59,8 +63,9 @@ func CheckImages(dir string) error {
 	return nil
 }
 
+// DetectQueueType detects which queue to use based on the preponderance
+// of files of a particular extension in a directory
 func DetectQueueType(dir string, conn Queuer) string {
-	// Auto detect type of queue to send to based on file extension
 	pngdirs, _ := filepath.Glob(dir + "/*.png")
 	jpgdirs, _ := filepath.Glob(dir + "/*.jpg")
 	pngcount := len(pngdirs)
diff --git a/internal/pipeline/put_test.go b/internal/pipeline/put_test.go
index 9cc8b02..af18ab4 100644
--- a/internal/pipeline/put_test.go
+++ b/internal/pipeline/put_test.go
@@ -7,6 +7,7 @@ package pipeline
 import (
 	"errors"
 	"os"
+	"rescribe.xyz/bookpipeline"
 	"testing"
 )
 
@@ -49,3 +50,26 @@ func Test_CheckImages(t *testing.T) {
 		})
 	}
 }
+
+func Test_DetectQueueType(t *testing.T) {
+	conn := &bookpipeline.LocalConn{}
+
+	cases := []struct {
+		dir string
+		qid string
+	}{
+		{"testdata/mostlypng", conn.WipeQueueId()},
+		{"testdata/mostlyjpg", conn.PreQueueId()},
+		{"testdata/equalpngandjpg", conn.PreQueueId()},
+		{"testdata/nonexistent", conn.PreQueueId()},
+	}
+
+	for _, c := range cases {
+		t.Run(c.dir, func(t *testing.T) {
+			qid := DetectQueueType(c.dir, conn)
+			if qid != c.qid {
+				t.Fatalf("Error, expected qid %v, got qid %v", qid, c.qid)
+			}
+		})
+	}
+}
diff --git a/internal/pipeline/testdata/equalpngandjpg/1.jpg b/internal/pipeline/testdata/equalpngandjpg/1.jpg
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/internal/pipeline/testdata/equalpngandjpg/1.jpg
diff --git a/internal/pipeline/testdata/equalpngandjpg/1.png b/internal/pipeline/testdata/equalpngandjpg/1.png
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/internal/pipeline/testdata/equalpngandjpg/1.png
diff --git a/internal/pipeline/testdata/mostlyjpg/1.jpg b/internal/pipeline/testdata/mostlyjpg/1.jpg
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/internal/pipeline/testdata/mostlyjpg/1.jpg
diff --git a/internal/pipeline/testdata/mostlyjpg/1.png b/internal/pipeline/testdata/mostlyjpg/1.png
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/internal/pipeline/testdata/mostlyjpg/1.png
diff --git a/internal/pipeline/testdata/mostlyjpg/2.jpg b/internal/pipeline/testdata/mostlyjpg/2.jpg
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/internal/pipeline/testdata/mostlyjpg/2.jpg
diff --git a/internal/pipeline/testdata/mostlypng/1.jpg b/internal/pipeline/testdata/mostlypng/1.jpg
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/internal/pipeline/testdata/mostlypng/1.jpg
diff --git a/internal/pipeline/testdata/mostlypng/1.png b/internal/pipeline/testdata/mostlypng/1.png
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/internal/pipeline/testdata/mostlypng/1.png
diff --git a/internal/pipeline/testdata/mostlypng/2.png b/internal/pipeline/testdata/mostlypng/2.png
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/internal/pipeline/testdata/mostlypng/2.png
diff --git a/internal/pipeline/testdata/notreadable/1.png b/internal/pipeline/testdata/notreadable/1.png
new file mode 100644
index 0000000..8f90f19
--- /dev/null
+++ b/internal/pipeline/testdata/notreadable/1.png