Coverage decorator (#384)

Add code coverage for colors and decorators.

src/ftxui/dom/separator_test.cpp

@@ -0,0 +1,114 @@
+#include <gtest/gtest-message.h>  // for Message
+#include <gtest/gtest-test-part.h>  // for SuiteApiResolver, TestFactoryImpl, TestPartResult
+#include "gtest/gtest_pred_impl.h"       // for Test, EXPECT_EQ, TEST
+#include <string>                   // for allocator
+#include "ftxui/dom/elements.hpp"        // for text, flexbox
+#include "ftxui/screen/screen.hpp"       // for Screen
+
+namespace ftxui {
+
+TEST(SeparatorTest, Default) {
+  auto element = vbox({
+      text("top"),
+      separator(),
+      text("down"),
+  });
+  Screen screen(4, 3);
+  Render(screen, element);
+  EXPECT_EQ(screen.ToString(),
+            "top \r\n"
+            "────\r\n"
+            "down");
+}
+
+TEST(SeparatorTest, Light) {
+  auto element = vbox({
+      text("top"),
+      separatorLight(),
+      text("down"),
+  });
+  Screen screen(4, 3);
+  Render(screen, element);
+  EXPECT_EQ(screen.ToString(),
+            "top \r\n"
+            "────\r\n"
+            "down");
+}
+
+TEST(SeparatorTest, Double) {
+  auto element = vbox({
+      text("top"),
+      separatorDouble(),
+      text("down"),
+  });
+  Screen screen(4, 3);
+  Render(screen, element);
+  EXPECT_EQ(screen.ToString(),
+            "top \r\n"
+            "════\r\n"
+            "down");
+}
+
+TEST(SeparatorTest, Heavy) {
+  auto element = vbox({
+      text("top"),
+      separatorHeavy(),
+      text("down"),
+  });
+  Screen screen(4, 3);
+  Render(screen, element);
+  EXPECT_EQ(screen.ToString(),
+            "top \r\n"
+            "━━━━\r\n"
+            "down");
+}
+
+TEST(SeparatorTest, Empty) {
+  auto element = vbox({
+      text("top"),
+      separatorEmpty(),
+      text("down"),
+  });
+  Screen screen(4, 3);
+  Render(screen, element);
+  EXPECT_EQ(screen.ToString(),
+            "top \r\n"
+            "    \r\n"
+            "down");
+}
+
+TEST(SeparatorTest, Styled) {
+  auto element = vbox({
+      text("top"),
+      separatorStyled(DOUBLE),
+      text("down"),
+  });
+  Screen screen(4, 3);
+  Render(screen, element);
+  EXPECT_EQ(screen.ToString(),
+            "top \r\n"
+            "════\r\n"
+            "down");
+}
+
+TEST(SeparatorTest, WithPixel) {
+  Pixel pixel;
+  pixel.character = "o";
+  auto element = vbox({
+      text("top"),
+      separator(pixel),
+      text("down"),
+  });
+  Screen screen(4, 3);
+  Render(screen, element);
+  EXPECT_EQ(screen.ToString(),
+            "top \r\n"
+            "oooo\r\n"
+            "down");
+}
+
+} // namespace ftxui
+
+// Copyright 2022 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.