Ensure Print{,f,ln} use global stdout

cmd/restic/global_test.go

@@ -0,0 +1,28 @@
+package main
+
+import (
+	"bytes"
+	"testing"
+
+	rtest "github.com/restic/restic/internal/test"
+)
+
+func Test_PrintFunctionsRespectsGlobalStdout(t *testing.T) {
+	gopts := globalOptions
+	defer func() {
+		globalOptions = gopts
+	}()
+
+	buf := bytes.NewBuffer(nil)
+	globalOptions.stdout = buf
+
+	for _, p := range []func(){
+		func() { Println("message") },
+		func() { Print("message\n") },
+		func() { Printf("mes%s\n", "sage") },
+	} {
+		p()
+		rtest.Equals(t, "message\n", buf.String())
+		buf.Reset()
+	}
+}