Add some tests for CellBuffer.

4 files changed, 152 insertions, 1 deletions

diff --git a/test/unit/makefile b/test/unit/makefile
index b3621ac57..de3b09d1c 100644
--- a/test/unit/makefile
+++ b/test/unit/makefile
@@ -39,6 +39,7 @@ CXXFLAGS += -Wall -Wextra
 TESTSRC=test*.cxx
 # Files being tested from scintilla/src directory
 TESTEDSRC=\
+ ../../src/CellBuffer.cxx \
  ../../src/CharClassify.cxx \
  ../../src/ContractionState.cxx \
  ../../src/Decoration.cxx \
diff --git a/test/unit/test.mak b/test/unit/test.mak
index d224b9e91..934b0aa12 100644
--- a/test/unit/test.mak
+++ b/test/unit/test.mak
@@ -12,6 +12,7 @@ CXXFLAGS = /EHsc /wd 4805 $(INCLUDEDIRS)
 TESTSRC=test*.cxx
 # Files being tested from scintilla/src directory
 TESTEDSRC=\
+ ../../src/CellBuffer.cxx \
  ../../src/CharClassify.cxx \
  ../../src/ContractionState.cxx \
  ../../src/Decoration.cxx \
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);
+	}
+
+}
diff --git a/test/unit/unitTest.cxx b/test/unit/unitTest.cxx
index 49c8253b8..9a45b1d93 100644
--- a/test/unit/unitTest.cxx
+++ b/test/unit/unitTest.cxx
@@ -9,10 +9,10 @@
         CharClassify
         Decoration
         DecorationList
+        CellBuffer
 
     To do:
         PerLine *
-        CellBuffer *
         Range
         StyledText
         CaseFolder ...
@@ -45,3 +45,12 @@ void Platform::Assert(const char *c, const char *file, int line) {
 	fprintf(stderr, "Assertion [%s] failed at %s %d\n", c, file, line);
 	abort();
 }
+
+void Platform::DebugPrintf(const char *format, ...) {
+	char buffer[2000];
+	va_list pArguments;
+	va_start(pArguments, format);
+	vsprintf(buffer, format, pArguments);
+	va_end(pArguments);
+	fprintf(stderr, "%s", buffer);
+}