Added simple unit tests for completion.

tests/TestCompletion.cpp

@@ -0,0 +1,50 @@
+#include <catch.hpp>
+
+#include <sstream>
+
+#include <anthem/Context.h>
+#include <anthem/Translation.h>
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+TEST_CASE("[completion] Rules are completed", "[completion]")
+{
+	std::stringstream input;
+	std::stringstream output;
+	std::stringstream errors;
+
+	anthem::output::Logger logger(output, errors);
+	anthem::Context context = {logger, {}};
+	context.simplify = true;
+	context.complete = true;
+
+	SECTION("predicte in single rule head")
+	{
+		input << "p :- q.";
+		anthem::translate("input", input, context);
+
+		REQUIRE(output.str() == "(p <-> q)\n");
+	}
+
+	SECTION("predicate in multiple rule heads")
+	{
+		input << "p :- q.\n"
+			"p :- r.\n"
+			"p :- s.";
+		anthem::translate("input", input, context);
+
+		REQUIRE(output.str() == "(p <-> (q or r or s))\n");
+	}
+
+	SECTION("multiple predicates are correctly separated")
+	{
+		input << "p :- s.\n"
+			"q :- t.\n"
+			"p :- q.\n"
+			"r :- t.\n"
+			"q :- r.";
+		anthem::translate("input", input, context);
+
+		REQUIRE(output.str() == "(p <-> (s or q))\n(q <-> (t or r))\n(r <-> t)\n");
+	}
+}

tests/TestSimplification.cpp

@@ -16,6 +16,7 @@ TEST_CASE("[simplification] Rules are simplified correctly", "[simplification]")
 	anthem::output::Logger logger(output, errors);
 	anthem::Context context = {logger, {}};
 	context.simplify = true;
+	context.complete = false;
 
 	SECTION("example 1")
 	{

tests/TestTranslation.cpp

@@ -16,6 +16,7 @@ TEST_CASE("[translation] Rules are translated correctly", "[translation]")
 	anthem::output::Logger logger(output, errors);
 	anthem::Context context = {logger, {}};
 	context.simplify = false;
+	context.complete = false;
 
 	SECTION("simple example 1")
 	{