v0.2.0 16 colors, default colors, /dev/tty, bracketed paste, themed form controls

detect_unix_test.go

@@ -0,0 +1,27 @@
+//go:build unix
+
+package terminal
+
+import (
+	"strings"
+	"testing"
+)
+
+// A text console gets 16 colors whatever COLORTERM says, NO_COLOR turns
+// color off unless the caller names a mode, and TERM=dumb is refused
+func TestDetectionFollowsTheTerminal(t *testing.T) {
+	t.Setenv("TERM", "linux")
+	t.Setenv("COLORTERM", "truecolor")
+	t.Setenv("NO_COLOR", "")
+	if got := New().ColorMode(); got != ColorMode16 {
+		t.Errorf("text console: mode %d", got)
+	}
+	t.Setenv("NO_COLOR", "1")
+	if got, named := New().ColorMode(), New(ColorMode256).ColorMode(); got != ColorModeNone || named != ColorMode256 {
+		t.Errorf("NO_COLOR: mode %d, named %d", got, named)
+	}
+	t.Setenv("TERM", "dumb")
+	if err := newBackend().Init(); err == nil || !strings.Contains(err.Error(), "dumb") {
+		t.Errorf("TERM=dumb: %v", err)
+	}
+}