package main

import (
	"strings"
	"testing"
)

func TestApplyThemeChangesAllRenderingThemes(t *testing.T) {
	defer func() {
		if err := applyTheme("dark"); err != nil {
			t.Fatal(err)
		}
	}()
	if err := applyTheme("light"); err != nil {
		t.Fatal(err)
	}
	if markdownStyleName != "light" || codeHighlightTheme != "github" {
		t.Fatalf("light theme did not propagate: markdown=%q code=%q", markdownStyleName, codeHighlightTheme)
	}
	if err := applyTheme("unknown"); err == nil {
		t.Fatal("unknown theme was accepted")
	}
}

func TestNoColorThemeDisablesSyntaxColors(t *testing.T) {
	defer applyTheme("dark")
	if err := applyTheme("no-color"); err != nil {
		t.Fatal(err)
	}
	rendered := highlightedSource("go", "func main() {}")
	if strings.Contains(rendered, "\x1b[") || colorEnabled {
		t.Fatalf("no-color source contains terminal colors: %q", rendered)
	}
}