v0.22.1 cli flag and behavior, and test output improvement

internal/sink/console/console_test.go

@@ -0,0 +1,25 @@
+package console
+
+import "testing"
+
+// Everything a terminal would act on is escaped; tabs and the final newline,
+// which it only lays out, are kept.
+func TestEscapeControlsKeepsOnlyLayout(t *testing.T) {
+	for in, want := range map[string]string{
+		"plain\ttext\n":                    "plain\ttext\n",
+		"a\x1b[2Jb\n":                      "a<1b>[2Jb\n",
+		"bell\x07 del\x7f\n":               "bell<07> del<7f>\n",
+		"inner\nnewline\n":                 "inner<0a>newline\n",
+		"c1 \u009b31m\n":                   "c1 <c29b>31m\n",
+		"bidi \u202eevil\n":                "bidi <e280ae>evil\n",
+		"isolate \u2066x\u2069\n":          "isolate <e281a6>x<e281a9>\n",
+		"line\u2028sep\n":                  "line<e280a8>sep\n",
+		"zwj \U0001f468\u200d\U0001f469\n": "zwj \U0001f468\u200d\U0001f469\n",
+		"bad \xff utf8":                    "bad <ff> utf8",
+		"ünïcødé and \ufffd kept\n":        "ünïcødé and \ufffd kept\n",
+	} {
+		if got := string(escapeControls([]byte(in))); got != want {
+			t.Errorf("%q: got %q, want %q", in, got, want)
+		}
+	}
+}