test:minor

1. Added a test for str.count() and included it over CMakeList.txt

Author: SudhanshuJoshi09

integration_tests/CMakeLists.txt

@@ -519,6 +519,7 @@ RUN(NAME test_str_01         LABELS cpython llvm c)
 RUN(NAME test_str_02         LABELS cpython llvm c)
 RUN(NAME test_str_03         LABELS cpython llvm c)
 RUN(NAME test_str_04         LABELS cpython llvm c wasm)
+RUN(NAME test_str_05         LABELS cpython llvm c)
 RUN(NAME test_list_01        LABELS cpython llvm c)
 RUN(NAME test_list_02        LABELS cpython llvm c)
 RUN(NAME test_list_03        LABELS cpython llvm c NOFAST)

integration_tests/test_str_05.py

@@ -0,0 +1,8 @@
+def main0():
+    x: str
+    x = "Hello, World"
+    y: str
+    y = "o"
+    assert x.count(y) == 2
+
+main0()