Add some tests for CellBuffer.

1 files changed, 140 insertions, 0 deletions

diff --git a/test/unit/testCellBuffer.cxx b/test/unit/testCellBuffer.cxx
new file mode 100644
index 000000000..691271927
--- /dev/null
+++ b/test/unit/testCellBuffer.cxx
@@ -0,0 +1,140 @@
+// Unit Tests for Scintilla internal data structures
+
+#include <cstring>
+#include <stdexcept>
+#include <algorithm>
+
+#include "Platform.h"
+
+#include "SplitVector.h"
+#include "Partitioning.h"
+#include "RunStyles.h"
+#include "CellBuffer.h"
+
+#include "catch.hpp"
+
+// Test CellBuffer.
+
+TEST_CASE("CellBuffer") {
+
+	const char sText[] = "Scintilla";
+	const size_t sLength = strlen(sText);
+
+	CellBuffer cb;
+	
+	SECTION("InsertOneLine") {
+		bool startSequence = false;
+		const char *cpChange = cb.InsertString(0, sText, sLength, startSequence);
+		REQUIRE(startSequence);
+		REQUIRE(sLength == cb.Length());
+		REQUIRE(memcmp(cpChange, sText, sLength) == 0);
+		REQUIRE(1 == cb.Lines());
+		REQUIRE(0 == cb.LineStart(0));
+		REQUIRE(0 == cb.LineFromPosition(0));
+		REQUIRE(sLength == cb.LineStart(1));
+		REQUIRE(0 == cb.LineFromPosition(sLength));
+		REQUIRE(cb.CanUndo());
+		REQUIRE(!cb.CanRedo());
+	}
+
+	SECTION("InsertTwoLines") {
+		const char sText2[] = "Two\nLines";
+		const size_t sLength2 = strlen(sText2);
+		bool startSequence = false;
+		const char *cpChange = cb.InsertString(0, sText2, sLength2, startSequence);
+		REQUIRE(startSequence);
+		REQUIRE(sLength2 == cb.Length());
+		REQUIRE(memcmp(cpChange, sText2, sLength2) == 0);
+		REQUIRE(2 == cb.Lines());
+		REQUIRE(0 == cb.LineStart(0));
+		REQUIRE(0 == cb.LineFromPosition(0));
+		REQUIRE(4 == cb.LineStart(1));
+		REQUIRE(1 == cb.LineFromPosition(5));
+		REQUIRE(sLength2 == cb.LineStart(2));
+		REQUIRE(1 == cb.LineFromPosition(sLength2));
+		REQUIRE(cb.CanUndo());
+		REQUIRE(!cb.CanRedo());
+	}
+
+	SECTION("UndoOff") {
+		REQUIRE(cb.IsCollectingUndo());
+		cb.SetUndoCollection(false);
+		REQUIRE(!cb.IsCollectingUndo());
+		bool startSequence = false;
+		const char *cpChange = cb.InsertString(0, sText, sLength, startSequence);
+		REQUIRE(!startSequence);
+		REQUIRE(sLength == cb.Length());
+		REQUIRE(memcmp(cpChange, sText, sLength) == 0);
+		REQUIRE(!cb.CanUndo());
+		REQUIRE(!cb.CanRedo());
+	}
+
+	SECTION("UndoRedo") {
+		const char sTextDeleted[] = "ci";
+		const char sTextAfterDeletion[] = "Sntilla";
+		bool startSequence = false;
+		const char *cpChange = cb.InsertString(0, sText, sLength, startSequence);
+		REQUIRE(startSequence);
+		REQUIRE(sLength == cb.Length());
+		REQUIRE(memcmp(cpChange, sText, sLength) == 0);
+		REQUIRE(memcmp(cb.BufferPointer(), sText, sLength) == 0);
+		REQUIRE(cb.CanUndo());
+		REQUIRE(!cb.CanRedo());
+		const char *cpDeletion = cb.DeleteChars(1, 2, startSequence);
+		REQUIRE(startSequence);
+		REQUIRE(memcmp(cpDeletion, sTextDeleted, strlen(sTextDeleted)) == 0);
+		REQUIRE(memcmp(cb.BufferPointer(), sTextAfterDeletion, strlen(sTextAfterDeletion)) == 0);
+		REQUIRE(cb.CanUndo());
+		REQUIRE(!cb.CanRedo());
+
+		int steps = cb.StartUndo();
+		REQUIRE(steps == 1);
+		cb.PerformUndoStep();
+		REQUIRE(memcmp(cb.BufferPointer(), sText, sLength) == 0);
+		REQUIRE(cb.CanUndo());
+		REQUIRE(cb.CanRedo());
+
+		steps = cb.StartUndo();
+		REQUIRE(steps == 1);
+		cb.PerformUndoStep();
+		REQUIRE(cb.Length() == 0);
+		REQUIRE(!cb.CanUndo());
+		REQUIRE(cb.CanRedo());
+
+		steps = cb.StartRedo();
+		REQUIRE(steps == 1);
+		cb.PerformRedoStep();
+		REQUIRE(memcmp(cb.BufferPointer(), sText, sLength) == 0);
+		REQUIRE(cb.CanUndo());
+		REQUIRE(cb.CanRedo());
+
+		steps = cb.StartRedo();
+		REQUIRE(steps == 1);
+		cb.PerformRedoStep();
+		REQUIRE(memcmp(cb.BufferPointer(), sTextAfterDeletion, strlen(sTextAfterDeletion)) == 0);
+		REQUIRE(cb.CanUndo());
+		REQUIRE(!cb.CanRedo());
+		
+		cb.DeleteUndoHistory();
+		REQUIRE(!cb.CanUndo());
+		REQUIRE(!cb.CanRedo());
+	}
+
+	SECTION("LineEndTypes") {
+		REQUIRE(cb.GetLineEndTypes() == 0);
+		cb.SetLineEndTypes(1);
+		REQUIRE(cb.GetLineEndTypes() == 1);
+		cb.SetLineEndTypes(0);
+		REQUIRE(cb.GetLineEndTypes() == 0);
+	}
+
+	SECTION("ReadOnly") {
+		REQUIRE(!cb.IsReadOnly());
+		cb.SetReadOnly(true);
+		REQUIRE(cb.IsReadOnly());
+		bool startSequence = false;
+		cb.InsertString(0, sText, sLength, startSequence);
+		REQUIRE(cb.Length() == 0);
+	}
+
+}