Added Reference test (Issue #1926)

Author: NishantBansal2003

tests/errors/test_int_semantic_error.py

@@ -0,0 +1,8 @@
+from lpython import i32
+
+def variable_function():
+    x: int = 1
+    y: i32 = 2
+    print("x + y is", x + y)
+
+variable_function()

tests/reference/asr-test_int_semantic_error-44fe25e.json

@@ -0,0 +1,13 @@
+{
+    "basename": "asr-test_int_semantic_error-44fe25e",
+    "cmd": "lpython --show-asr --no-color {infile} -o {outfile}",
+    "infile": "tests/errors/test_int_semantic_error.py",
+    "infile_hash": "79ca7d3f440b2538aa0819f910bea5ef24820d245b2179e1bf4cce6d",
+    "outfile": null,
+    "outfile_hash": null,
+    "stdout": null,
+    "stdout_hash": null,
+    "stderr": "asr-test_int_semantic_error-44fe25e.stderr",
+    "stderr_hash": "a1cd1ec0fee194e3c1651668753a1666ca46c925fa91335c6230e026",
+    "returncode": 2
+}

tests/reference/asr-test_int_semantic_error-44fe25e.stderr

@@ -0,0 +1,5 @@
+semantic error: int type is not supported yet. 
+ --> tests/errors/test_int_semantic_error.py:4:8
+  |
+4 |     x: int = 1
+  |        ^^^ Hint: Use i8, i16, i32 or i64 for now. 

tests/tests.toml

@@ -1100,6 +1100,10 @@ asr = true
 filename = "errors/test_unsupported_type.py"
 asr = true
 
+[[test]]
+filename = "errors/test_int_semantic_error.py"
+asr = true
+
 [[test]]
 filename = "errors/generics_error_01.py"
 asr = true