1 files changed, 42 insertions, 0 deletions
diff --git a/helper/pipe_test.go b/helper/pipe_test.go
new file mode 100644
index 00000000..e9c8d06b
--- /dev/null
+++ b/helper/pipe_test.go
@@ -0,0 +1,42 @@
+package helper
+
+import (
+	"testing"
+)
+
+func Test_pipes_pipe_mustClosePipes(t *testing.T) {
+	p := new(pipes)
+
+	t.Run("pipe without args", func(t *testing.T) {
+		defer func() {
+			wantPanic := "attempted to pipe without args"
+			if r := recover(); r != wantPanic {
+				t.Errorf("pipe() panic = %v, wantPanic %v",
+					r, wantPanic)
+			}
+		}()
+		_ = p.pipe()
+	})
+
+	p.args = MustNewCheckedArgs(make([]string, 0))
+	t.Run("obtain pipes", func(t *testing.T) {
+		if err := p.pipe(); err != nil {
+			t.Errorf("pipe() error = %v",
+				err)
+			return
+		}
+	})
+
+	t.Run("pipe twice", func(t *testing.T) {
+		defer func() {
+			wantPanic := "attempted to pipe twice"
+			if r := recover(); r != wantPanic {
+				t.Errorf("pipe() panic = %v, wantPanic %v",
+					r, wantPanic)
+			}
+		}()
+		_ = p.pipe()
+	})
+
+	p.mustClosePipes()
+}