implement e2etest

test-fixtures/for/expected.txt

@@ -0,0 +1,17 @@
+0
+1
+2
+3
+4
+
+2
+4
+8
+16
+32
+64
+128
+256
+512
+1024
+2048

test-fixtures/for/main.c

@@ -0,0 +1,22 @@
+void put_int(int x);
+void put_str(char* str);
+void put_blank_line(void);
+
+int main(void) {
+    for (; 0;) {
+        put_str("ERROR: for loop should not be executed");
+    }
+
+    for (int i = 0; i < 5; i++) {
+        put_int(i);
+    }
+    put_blank_line();
+
+    int i = 0, y = 0, z = 1;
+    for (i = 0; i < 11; i++) {
+        z = 2 * z;
+        put_int(z);
+    }
+
+    return 0;
+}

test-fixtures/x-mergesort/main.c

@@ -54,10 +54,8 @@ int main(void) {
     int array[10] = {13, 3, 9, 8, 5, 1, 4, 11, 2, 7};
     merge_sort(array, 0, 9);
 
-    int i = 0;
-    while (i < 10) {
+    for (int i = 0; i < 10; ++i) {
         put_int(array[i]);
-        i++;
     }
 
     return 0;