Use assert statement in tests

integration_tests/expr_01.py

@@ -1,7 +1,7 @@
 def main0():
     x: i32
     x = (2+3)*5
-    print(x)
+    assert x == 25
 
 main0()
 

integration_tests/expr_03.py

@@ -6,6 +6,6 @@ def main0():
     while x > 0:
         result = result * x
         x -= 1
-    print(result)
+    assert result == 120
 
 main0()

integration_tests/expr_04.py

@@ -8,6 +8,6 @@ def main0():
         sum += i
         if i > 5:
             break
-    print(sum)
+    assert sum == 21
 
 main0()

integration_tests/expr_05.py

@@ -8,6 +8,6 @@ def main0():
     b: i32
     a = 10
     b = -5
-    print(test_multiply(a, b))
+    assert test_multiply(a, b) == -50
 
 main0()

integration_tests/modules_01.py

@@ -3,7 +3,7 @@
 def main0():
     x: i32
     x = (2+3)*5
-    print(x)
+    assert x == 25
     f()
 #    x = g()
 #    print(x)

integration_tests/modules_02.py

@@ -3,7 +3,7 @@
 def main0():
     x: i32
     x = (2+3)*5
-    print(x)
+    assert x == 25
     f()
 
 main0()