added an example test file

genimage/pic/pic_test.go

@@ -0,0 +1,17 @@
+package pic
+
+import "testing"
+
+func TestExpectedFailure(t *testing.T) {
+	const a, b = 3, 2
+	if a != b {
+		t.Error("contrived failure")
+	}
+}
+
+func TestExpectedSuccess(t *testing.T) {
+	const a, b = 3, 3
+	if a != b {
+		t.Error("contrived failure")
+	}
+}