file streamer test

internal/app/imagedup/files_test.go

@@ -0,0 +1,65 @@
+package imagedup
+
+import (
+	"context"
+	"testing"
+
+	"github.com/kmulvey/path"
+	"github.com/stretchr/testify/assert"
+)
+
+var expectedPairs = map[string]struct{}{
+	"testimages/iceland-small.jpgtestimages/iceland.jpg": {},
+	"testimages/iceland-small.jpgtestimages/trees.jpg":   {},
+	"testimages/iceland.jpgtestimages/trees.jpg":         {},
+}
+
+func TestStreamFiles(t *testing.T) {
+	t.Parallel()
+
+	var id, err = NewImageDup(context.Background(), "TestStreamFiles", "cacheFile.json", "outputFile.log", 2, 10)
+	assert.NoError(t, err)
+
+	var done = make(chan struct{})
+	go func() {
+		for img := range id.images {
+			delete(expectedPairs, img.One+img.Two)
+		}
+		assert.Equal(t, 0, len(expectedPairs))
+
+		close(done)
+	}()
+
+	files, err := path.ListFiles("./testimages")
+	assert.NoError(t, err)
+	files = path.OnlyFiles(files)
+	var fileNames = path.OnlyNames(files)
+
+	id.streamFiles(fileNames)
+
+	<-done
+}
+
+func TestStreamFilesCancel(t *testing.T) {
+	t.Parallel()
+
+	var ctx, cancel = context.WithCancel(context.Background())
+	var id, err = NewImageDup(ctx, "TestStreamFilesCancel", "cacheFile.json", "outputFile.log", 2, 10)
+	assert.NoError(t, err)
+
+	var done = make(chan struct{})
+	go func() {
+		var numImages int
+		for range id.images {
+			numImages++
+		}
+		assert.True(t, numImages < 100) // kind of arbitrary, it basically just needs to be small
+
+		close(done)
+	}()
+
+	go id.streamFiles(make([]string, 100))
+	cancel()
+
+	<-done
+}