1 files changed, 77 insertions, 0 deletions
diff --git a/test/unit/testRESearch.cxx b/test/unit/testRESearch.cxx
new file mode 100644
index 000000000..0dadc21c4
--- /dev/null
+++ b/test/unit/testRESearch.cxx
@@ -0,0 +1,77 @@
+/** @file testRESearch.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 "Debugging.h"
+
+#include "Position.h"
+#include "SplitVector.h"
+#include "Partitioning.h"
+#include "RunStyles.h"
+#include "CellBuffer.h"
+#include "CharClassify.h"
+#include "RESearch.h"
+
+#include "catch.hpp"
+
+using namespace Scintilla;
+using namespace Scintilla::Internal;
+
+class StringCI : public CharacterIndexer {
+	std::string s;
+public:
+	StringCI(std::string_view sv_) : s(sv_) {
+	}
+	Sci::Position Length() const noexcept {
+		return s.length();
+	}
+	char CharAt(Sci::Position index) const override {
+		return s.at(index);
+	}
+};
+
+// Test RESearch.
+
+TEST_CASE("RESearch") {
+
+	CharClassify cc;
+	const char sTextSpace[] = "Scintilla ";
+	const char pattern[] = "[a-z]+";
+
+	SECTION("Compile") {
+		std::unique_ptr<RESearch> re = std::make_unique<RESearch>(&cc);
+		const char *msg = re->Compile(pattern, strlen(pattern), true, false);
+		REQUIRE(nullptr == msg);
+	}
+
+	SECTION("Execute") {
+		std::unique_ptr<RESearch> re = std::make_unique<RESearch>(&cc);
+		re->Compile(pattern, strlen(pattern), true, false);
+		StringCI sci(sTextSpace);
+		const int x = re->Execute(sci, 0, sci.Length());
+		REQUIRE(x == 1);
+		REQUIRE(re->bopat[0] == 1);
+		REQUIRE(re->eopat[0] == sci.Length() - 1);
+	}
+
+	SECTION("Grab") {
+		std::unique_ptr<RESearch> re = std::make_unique<RESearch>(&cc);
+		re->Compile(pattern, strlen(pattern), true, false);
+		StringCI sci(sTextSpace);
+		re->Execute(sci, 0, sci.Length());
+		re->GrabMatches(sci);
+		REQUIRE(re->pat[0] == "cintilla");
+	}
+
+}