From 9f68e6b8d1b657c3be47e2ac27a4929bf7e5f92d Mon Sep 17 00:00:00 2001
From: Marvin Kaiser <marvin.kaiser.93@gmail.com>
Date: Tue, 17 Dec 2019 19:09:09 +0100
Subject: [PATCH] Added test for recursive calls

---
 makefile                       |  2 +-
 src/test/recursive/recursive.c | 28 ++++++++++++++++++++++++++++
 src/test/recursive/recursive.h |  1 +
 src/test/testCode.c            | 10 +++++++---
 src/test/tests.h               |  3 ++-
 src/test/tests.k               |  7 +++++++
 6 files changed, 46 insertions(+), 5 deletions(-)
 create mode 100644 src/test/recursive/recursive.c
 create mode 100644 src/test/recursive/recursive.h

diff --git a/makefile b/makefile
index 58f36df..9f11615 100644
--- a/makefile
+++ b/makefile
@@ -18,7 +18,7 @@ runTest: ./src/test/test
 	./src/test/test
 	
 ./src/test/test: ./src/test/tests.s
-	gcc -o ./src/test/test ./src/test/tests.s ./src/test/functionCall/functionCall.c ./src/test/testCode.c
+	gcc -o ./src/test/test ./src/test/tests.s ./src/test/functionCall/functionCall.c ./src/test/recursive/recursive.c ./src/test/testCode.c
 
 ./src/test/tests.s: target/klang-1.0-jar-with-dependencies.jar
 	java -cp target/klang-1.0-jar-with-dependencies.jar de.hsrm.compiler.Klang.Klang < ./src/test/tests.k > ./src/test/tests.s
diff --git a/src/test/recursive/recursive.c b/src/test/recursive/recursive.c
new file mode 100644
index 0000000..db9febc
--- /dev/null
+++ b/src/test/recursive/recursive.c
@@ -0,0 +1,28 @@
+#include <stdio.h>
+#include "recursive.h"
+
+void printRecSuccess(char* name, int x,  int expected, int result) {
+  printf("SUCCESS:\t%s(%d)\tGOT: %d\tExpected: %d\n", name, x, result, expected);
+}
+
+void printRecError(char* name, int x, int expected, int result) {
+  printf("ERROR:\t\t%s(%d)\tGOT: %d\tExpected: %d\n", name, x, result, expected);
+}
+
+int recursiveTest(char* name, int x, int expected, int result) {
+  if (expected == result) {
+    printRecSuccess(name, x, expected, result);
+    return 0;
+  } else {
+    printRecError(name, x, expected, result);
+    return 1;
+  }
+}
+
+int runRecursiveTests() {
+  printf("\nRecursive Tests \n");
+  int failed = 0;
+  failed += recursiveTest("fac", 5, 120, fac(5));
+
+  return failed;
+}
\ No newline at end of file
diff --git a/src/test/recursive/recursive.h b/src/test/recursive/recursive.h
new file mode 100644
index 0000000..704036e
--- /dev/null
+++ b/src/test/recursive/recursive.h
@@ -0,0 +1 @@
+int fac(int x);
\ No newline at end of file
diff --git a/src/test/testCode.c b/src/test/testCode.c
index 609306f..282ca5f 100644
--- a/src/test/testCode.c
+++ b/src/test/testCode.c
@@ -105,14 +105,18 @@ int main(){
   failed +=  testOneArg("id", cId, id, -1);
   failed +=  testOneArg("id", cId, id, 15);
 
-  // Test for passing arguments to functions
+  // Tests for passing arguments to functions
   failed += runFunctionCallTests();
 
+  // Tests for recursive funtions
+  failed += runRecursiveTests();
+
   printf("\n=== Failed Tests: %d\n", failed);
+
   if (failed > 0) {
     return EXIT_FAILURE;
+  } else {
+    return EXIT_SUCCESS;
   }
-
-  return EXIT_SUCCESS;
 }
   
\ No newline at end of file
diff --git a/src/test/tests.h b/src/test/tests.h
index 112df7f..0754e0a 100644
--- a/src/test/tests.h
+++ b/src/test/tests.h
@@ -2,4 +2,5 @@
   Alle Test Module
 */
 
-int runFunctionCallTests ();
\ No newline at end of file
+int runFunctionCallTests();
+int runRecursiveTests();
\ No newline at end of file
diff --git a/src/test/tests.k b/src/test/tests.k
index f23c084..6b82c3a 100644
--- a/src/test/tests.k
+++ b/src/test/tests.k
@@ -95,4 +95,11 @@ function get10() {
   return arg10(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
 }
 
+function fac(x) {
+  if (x) {
+    return (x * fac((x - 1)));
+  }
+  return 1;
+}
+
 add(1, 1);