Added tests based on basic_new_stack function

Author: anutosh491

integration_tests/CMakeLists.txt

@@ -646,6 +646,7 @@ RUN(NAME symbolics_04        LABELS cpython_sym c_sym)
 RUN(NAME symbolics_05        LABELS cpython_sym c_sym)
 RUN(NAME symbolics_06        LABELS cpython_sym c_sym)
 RUN(NAME symbolics_07        LABELS cpython_sym c_sym llvm_sym NOFAST)
+RUN(NAME symbolics_08        LABELS c_sym llvm_sym)
 
 RUN(NAME sizeof_01           LABELS llvm c
         EXTRAFILES sizeof_01b.c)

integration_tests/symbolics_08.py

@@ -0,0 +1,26 @@
+from lpython import ccall, CPtr, p_c_pointer, pointer, i64, empty_c_void_p
+import os
+
+@ccall(header="symengine/cwrapper.h", c_shared_lib="symengine", c_shared_lib_path=f"{os.environ['CONDA_PREFIX']}/lib")
+def basic_new_stack(x: CPtr) -> None:
+    pass
+
+@ccall(header="symengine/cwrapper.h", c_shared_lib="symengine", c_shared_lib_path=f"{os.environ['CONDA_PREFIX']}/lib")
+def basic_const_pi(x: CPtr) -> None:
+    pass
+
+@ccall(header="symengine/cwrapper.h", c_shared_lib="symengine", c_shared_lib_path=f"{os.environ['CONDA_PREFIX']}/lib")
+def basic_str(x: CPtr) -> str:
+    pass
+
+def main0():
+    y: i64 = i64(0)
+    x: CPtr = empty_c_void_p()
+    p_c_pointer(pointer(y), x)
+    basic_new_stack(x)
+    basic_const_pi(x)
+    s: str = basic_str(x)
+    print(s)
+    assert s == "pi"
+
+main0()