5 files changed, 36 insertions, 0 deletions
diff --git a/internal/pipeline/put_test.go b/internal/pipeline/put_test.go
new file mode 100644
index 0000000..68dd173
--- /dev/null
+++ b/internal/pipeline/put_test.go
@@ -0,0 +1,36 @@
+// Copyright 2021 Nick White.
+// Use of this source code is governed by the GPLv3
+// license that can be found in the LICENSE file.
+
+package pipeline
+
+import (
+	"errors"
+	"testing"
+)
+
+func Test_CheckImages(t *testing.T) {
+	cases := []struct {
+		dir string
+		err error
+	}{
+		{"testdata/good", nil},
+		{"testdata/bad", errors.New("Decoding image testdata/bad/bad.png failed: png: invalid format: invalid checksum")},
+		{"testdata/nonexistent", nil},
+	}
+
+	for _, c := range cases {
+		t.Run(c.dir, func(t *testing.T) {
+			err := CheckImages(c.dir)
+			if err == nil && c.err != nil {
+				t.Fatalf("Expected error '%v', got no error", c.err)
+			}
+			if err != nil && c.err == nil {
+				t.Fatalf("Expected no error, got error '%v'", err)
+			}
+			if err != nil && c.err != nil && err.Error() != c.err.Error() {
+				t.Fatalf("Got an unexpected error, expected '%v', got '%v'", c.err, err)
+			}
+		})
+	}
+}
diff --git a/internal/pipeline/testdata/bad/1.png b/internal/pipeline/testdata/bad/1.png
new file mode 100644
index 0000000..8f90f19
--- /dev/null
+++ b/internal/pipeline/testdata/bad/1.png
diff --git a/internal/pipeline/testdata/bad/bad.png b/internal/pipeline/testdata/bad/bad.png
new file mode 100644
index 0000000..77f2d14
--- /dev/null
+++ b/internal/pipeline/testdata/bad/bad.png
diff --git a/internal/pipeline/testdata/good/1.png b/internal/pipeline/testdata/good/1.png
new file mode 100644
index 0000000..8f90f19
--- /dev/null
+++ b/internal/pipeline/testdata/good/1.png
diff --git a/internal/pipeline/testdata/good/2.png b/internal/pipeline/testdata/good/2.png
new file mode 100644
index 0000000..a9ecd94
--- /dev/null
+++ b/internal/pipeline/testdata/good/2.png