add arithmetic tests for "more than two values on the stack"

Author: glennj

exercises/forth/canonical-data.json

@@ -62,6 +62,15 @@
           "expected": {
             "error": "only one value on the stack"
           }
+        },
+        {
+          "uuid": "1e07a098-c5fa-4c66-97b2-3c81205dbc2f",
+          "description": "more than two values on the stack",
+          "property": "evaluate",
+          "input": {
+            "instructions": ["1 2 3 +"]
+          },
+          "expected": [1, 5]
         }
       ]
     },
@@ -98,6 +107,15 @@
           "expected": {
             "error": "only one value on the stack"
           }
+        },
+        {
+          "uuid": "2c8cc5ed-da97-4cb1-8b98-fa7b526644f4",
+          "description": "more than two values on the stack",
+          "property": "evaluate",
+          "input": {
+            "instructions": ["1 12 3 -"]
+          },
+          "expected": [1, 9]
         }
       ]
     },
@@ -134,6 +152,15 @@
           "expected": {
             "error": "only one value on the stack"
           }
+        },
+        {
+          "uuid": "5cd085b5-deb1-43cc-9c17-6b1c38bc9970",
+          "description": "more than two values on the stack",
+          "property": "evaluate",
+          "input": {
+            "instructions": ["1 2 3 *"]
+          },
+          "expected": [1, 6]
         }
       ]
     },
@@ -190,6 +217,15 @@
           "expected": {
             "error": "only one value on the stack"
           }
+        },
+        {
+          "uuid": "f224f3e0-b6b6-4864-81de-9769ecefa03f",
+          "description": "more than two values on the stack",
+          "property": "evaluate",
+          "input": {
+            "instructions": ["1 12 3 /"]
+          },
+          "expected": [1, 4]
         }
       ]
     },