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

internal/env/env_test.go

@@ -0,0 +1,26 @@
+package env
+
+import "testing"
+
+// A text console, VT100-class included, gets 16 colors whatever COLORTERM
+// says; vte, a modern emulator, is not one
+func TestTextConsoleWinsOverColorterm(t *testing.T) {
+	for _, v := range trueColorVars {
+		t.Setenv(v, "")
+	}
+	t.Setenv("COLORTERM", "truecolor")
+	for term, want := range map[string]int{
+		"linux": 16, "cons25": 16, "vt220": 16, "ansi": 16, "xterm-16color": 16,
+		"vte-256color": 1 << 24, "vt": 1 << 24, "xterm-256color": 1 << 24,
+	} {
+		t.Setenv("TERM", term)
+		if got := Colors(); got != want {
+			t.Errorf("TERM=%s: %d colors, want %d", term, got, want)
+		}
+	}
+	t.Setenv("COLORTERM", "")
+	t.Setenv("TERM", "vte-256color")
+	if got := Colors(); got != 256 {
+		t.Errorf("vte-256color: %d", got)
+	}
+}