Add tests for octal parsing.

Author: Maarten Staa

test/snapshot/__snapshots__/scalar.test.js.snap

@@ -1,5 +1,63 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
+exports[`Test scalar statements implicit octal 1`] = `
+Program {
+  "children": Array [
+    ExpressionStatement {
+      "expression": Assign {
+        "kind": "assign",
+        "left": Variable {
+          "curly": false,
+          "kind": "variable",
+          "name": "var",
+        },
+        "operator": "=",
+        "right": Number {
+          "kind": "number",
+          "value": "0123",
+        },
+      },
+      "kind": "expressionstatement",
+    },
+  ],
+  "errors": Array [],
+  "kind": "program",
+}
+`;
+
+exports[`Test scalar statements php 8.1 explicit octal 1`] = `
+Program {
+  "children": Array [
+    ExpressionStatement {
+      "expression": Assign {
+        "kind": "assign",
+        "left": Variable {
+          "curly": false,
+          "kind": "variable",
+          "name": "var",
+        },
+        "operator": "=",
+        "right": Bin {
+          "kind": "bin",
+          "left": Number {
+            "kind": "number",
+            "value": "0o123",
+          },
+          "right": Number {
+            "kind": "number",
+            "value": "0o001_234",
+          },
+          "type": "+",
+        },
+      },
+      "kind": "expressionstatement",
+    },
+  ],
+  "errors": Array [],
+  "kind": "program",
+}
+`;
+
 exports[`Test scalar statements test constants #2 1`] = `
 Program {
   "children": Array [

test/snapshot/scalar.test.js

@@ -17,6 +17,8 @@ describe("Test scalar statements", function () {
     ["test dereferencable_scalar", "$var = array(1);"],
     ["test dereferencable_scalar #2", "$var = [1];"],
     ["test dereferencable_scalar #3", '$var = "test";'],
+    ["php 8.1 explicit octal", "$var = 0o123 + 0o001_234;"],
+    ["implicit octal", "$var = 0123;"],
   ])("%s", function (_, code) {
     expect(parser.parseEval(code)).toMatchSnapshot();
   });