TESTS: For chr() with different integer kind

Author: ubaidsk

integration_tests/CMakeLists.txt

@@ -445,6 +445,7 @@ RUN(NAME expr_17             LABELS cpython llvm c)
 RUN(NAME expr_18    FAIL     LABELS cpython llvm c)
 RUN(NAME expr_19             LABELS cpython llvm c)
 RUN(NAME expr_20             LABELS cpython llvm c)
+RUN(NAME expr_21             LABELS cpython llvm c)
 
 RUN(NAME expr_01u            LABELS cpython llvm c NOFAST)
 RUN(NAME expr_02u            LABELS cpython llvm c NOFAST)

integration_tests/expr_21.py

@@ -0,0 +1,21 @@
+from lpython import i8, i16, i32, i64
+
+def main0():
+    x: i8
+    y: i16
+    z: i32
+    w: i64
+
+    x = i8(97)
+    y = i16(47)
+    z = 56
+    w = i64(67)
+
+    print(chr(x), chr(y), chr(z), chr(w))
+
+    assert chr(x) == 'a'
+    assert chr(y) == '/'
+    assert chr(z) == '8'
+    assert chr(w) == 'C'
+
+main0()