Add compile time test for string to list

integration_tests/CMakeLists.txt

@@ -228,6 +228,7 @@ RUN(NAME test_version        LABELS cpython llvm)
 RUN(NAME vec_01              LABELS cpython llvm)
 RUN(NAME test_str_comparison LABELS cpython llvm)
 RUN(NAME test_bit_length     LABELS cpython llvm)
+RUN(NAME str_to_list_cast    LABELS cpython llvm)
 
 RUN(NAME generics_01         LABELS cpython llvm)
 RUN(NAME generics_02         LABELS cpython llvm)

integration_tests/str_to_list_cast.py

@@ -0,0 +1,14 @@
+def f():
+    x: list[str]
+    x = list("lpython")
+    s: str
+    s = "lpython"
+    i: i32
+    for i in range(len(s)):
+        assert x[i] == s[i]
+    x = list("")
+    assert len(x) == 0
+    x = list("L")
+    assert len(x) == 1 and x[0] == 'L'
+
+f()