TESTS: For list concat and list section

Author: ubaidsk

integration_tests/CMakeLists.txt

@@ -500,6 +500,7 @@ RUN(NAME test_list_09        LABELS cpython llvm c NOFAST)
 RUN(NAME test_list_10        LABELS cpython llvm c NOFAST)
 RUN(NAME test_list_11        LABELS cpython llvm c)
 RUN(NAME test_list_section   LABELS cpython llvm c NOFAST)
+RUN(NAME test_list_section2  LABELS cpython llvm c NOFAST)
 RUN(NAME test_list_count     LABELS cpython llvm)
 RUN(NAME test_list_index     LABELS cpython llvm)
 RUN(NAME test_list_index2    LABELS cpython llvm)
@@ -509,6 +510,7 @@ RUN(NAME test_list_pop       LABELS cpython llvm NOFAST) # TODO: Remove NOFAST f
 RUN(NAME test_list_pop2       LABELS cpython llvm NOFAST) # TODO: Remove NOFAST from here.
 RUN(NAME test_list_pop3      LABELS cpython llvm)
 RUN(NAME test_list_compare   LABELS cpython llvm)
+RUN(NAME test_list_concat    LABELS cpython llvm c NOFAST)
 RUN(NAME test_tuple_01       LABELS cpython llvm c)
 RUN(NAME test_tuple_02       LABELS cpython llvm c NOFAST)
 RUN(NAME test_tuple_03       LABELS cpython llvm c)

integration_tests/test_list_concat.py

@@ -0,0 +1,18 @@
+from lpython import i32, f64
+
+def test_list_concat():
+    t1: list[i32]
+    t1 = [2] + [3]
+    print(t1)
+    assert len(t1) == 2
+    assert t1[0] == 2
+    assert t1[1] == 3
+
+    t2: list[f64]
+    t2 = [3.14, -4.5] + [1.233, -0.012, 5555.50]
+    print(t2)
+    assert len(t2) == 5
+    assert abs(t2[0] - 3.14) <= 1e-5
+    assert abs(t2[-1] - 5555.50) <= 1e-5
+
+test_list_concat()

integration_tests/test_list_section2.py

@@ -0,0 +1,12 @@
+from lpython import i32
+
+
+def test_list_section():
+    x: list[i32]
+    x = [5, -6, 7, -1, 2, 10, -8, 15]
+
+    n: i32 = len(x[1:4])
+    print(n)
+    assert n == 3
+
+test_list_section()