TEST: Add integration_test for In, Out, InOut

Author: ubaidsk

integration_tests/CMakeLists.txt

@@ -506,6 +506,7 @@ RUN(NAME test_str_comparison LABELS cpython llvm c)
 RUN(NAME test_bit_length     LABELS cpython llvm c)
 RUN(NAME str_to_list_cast    LABELS cpython llvm c)
 RUN(NAME test_sys_01         LABELS cpython llvm c)
+RUN(NAME intent_01           LABELS cpython llvm)
 
 
 RUN(NAME test_package_01     LABELS cpython llvm)

integration_tests/intent_01.py

@@ -0,0 +1,26 @@
+from lpython import i32, u32, f64, dataclass, In, Out, InOut
+
+@dataclass
+class Foo:
+    p: i32
+
+def f(x: i32, y: In[f64], z: InOut[list[u32]], w: Out[Foo]):
+    assert (x == -12)
+    assert abs(y - (4.44)) <= 1e-12
+    z.append(u32(5))
+    w.p = 24
+
+
+def main0():
+    a: i32 = (-12)
+    b: f64 = 4.44
+    c: list[u32] = [u32(1), u32(2), u32(3), u32(4)]
+    d: Foo = Foo(25)
+
+    print(a, b, c, d.p)
+
+    f(a, b, c, d)
+    assert c[-1] == u32(5)
+    assert d.p == 24
+
+main0()