1 files changed, 59 insertions, 0 deletions
diff --git a/test/unit/testDocument.cxx b/test/unit/testDocument.cxx
new file mode 100644
index 000000000..983074daf
--- /dev/null
+++ b/test/unit/testDocument.cxx
@@ -0,0 +1,59 @@
+/** @file testDocument.cxx
+ ** Unit Tests for Scintilla internal data structures
+ **/
+
+#include <cstddef>
+#include <cstring>
+#include <stdexcept>
+#include <string_view>
+#include <vector>
+#include <optional>
+#include <algorithm>
+#include <memory>
+
+#include "ScintillaTypes.h"
+
+#include "ILoader.h"
+#include "ILexer.h"
+
+#include "Debugging.h"
+
+#include "CharacterCategoryMap.h"
+#include "Position.h"
+#include "SplitVector.h"
+#include "Partitioning.h"
+#include "RunStyles.h"
+#include "CellBuffer.h"
+#include "CharClassify.h"
+#include "Decoration.h"
+#include "CaseFolder.h"
+#include "Document.h"
+
+#include "catch.hpp"
+
+using namespace Scintilla;
+using namespace Scintilla::Internal;
+
+// Test Document.
+
+TEST_CASE("Document") {
+
+	const char sText[] = "Scintilla";
+	const Sci::Position sLength = static_cast<Sci::Position>(strlen(sText));
+
+	Document doc(DocumentOption::Default);
+
+	SECTION("InsertOneLine") {
+		const Sci::Position length = doc.InsertString(0, sText, sLength);
+		REQUIRE(sLength == doc.Length());
+		REQUIRE(length == sLength);
+		REQUIRE(1 == doc.LinesTotal());
+		REQUIRE(0 == doc.LineStart(0));
+		REQUIRE(0 == doc.LineFromPosition(0));
+		REQUIRE(sLength == doc.LineStart(1));
+		REQUIRE(0 == doc.LineFromPosition(static_cast<int>(sLength)));
+		REQUIRE(doc.CanUndo());
+		REQUIRE(!doc.CanRedo());
+	}
+
+}