added test cases for flags with empty string value

assignment-v2/test-case-7.json

@@ -0,0 +1,37 @@
+{
+  "experiment": "empty_string_variations_test",
+  "valueType": "string",
+  "subjectsWithAttributes": [
+    {
+      "subjectKey": "subject-1",
+      "subjectAttributes": {
+        "email": "[email protected]"
+      }
+    },
+    {
+      "subjectKey": "subject-2",
+      "subjectAttributes": {
+        "email": "[email protected]"
+      }
+    },
+    {
+      "subjectKey": "subject-3",
+      "subjectAttributes": {
+        "device": "android",
+        "version": "1.0.0"
+      }
+    },
+    {
+      "subjectKey": "subject-4",
+      "subjectAttributes": {
+        "country": "US"
+      }
+    }
+  ],
+  "expectedAssignments": [
+    "test-value",
+    "",
+    "another-value",
+    ""
+  ]
+}

ufc/flags-v1-obfuscated.json

@@ -1284,6 +1284,77 @@
           "value": "eyJhIjogIueFp+mhviIsICJiIjogIua8guS6riJ9"
         }
       }
+    },
+    "1d23cbd300895799fda462f81ec4e135": {
+      "key": "1d23cbd300895799fda462f81ec4e135",
+      "comment": "Testing the empty string as a variation value",
+      "enabled": true,
+      "variationType": "STRING",
+      "variations": {
+        "ZW1wdHlfc3RyaW5n": {
+          "key": "ZW1wdHlfc3RyaW5n",
+          "value": ""
+        },
+        "bm9uX2VtcHR5": {
+          "key": "bm9uX2VtcHR5",
+          "value": "bm9uX2VtcHR5"
+        }
+      },
+      "allocations": [
+        {
+          "key": "YWxsb2NhdGlvbi1lbXB0eQ==",
+          "rules": [
+            {
+              "conditions": [
+                {
+                  "attribute": "e909c2d7067ea37437cf97fe11d91bd0",
+                  "operator": "05015086bdd8402218f6aad6528bef08",
+                  "value": "VVM="
+                }
+              ]
+            }
+          ],
+          "splits": [
+            {
+              "variationKey": "ZW1wdHlfc3RyaW5n",
+              "shards": [
+                {
+                  "salt": "YWxsb2NhdGlvbi1lbXB0eS1zaGFyZHM=",
+                  "ranges": [
+                    {
+                      "start": 0,
+                      "end": 10000
+                    }
+                  ]
+                }
+              ]
+            }
+          ],
+          "doLog": true
+        },
+        {
+          "key": "YWxsb2NhdGlvbi10ZXN0",
+          "rules": [],
+          "splits": [
+            {
+              "variationKey": "bm9uX2VtcHR5",
+              "shards": [
+                {
+                  "salt": "YWxsb2NhdGlvbi1lbXB0eS1zaGFyZHM=",
+                  "ranges": [
+                    {
+                      "start": 0,
+                      "end": 10000
+                    }
+                  ]
+                }
+              ]
+            }
+          ],
+          "doLog": true
+        }
+      ],
+      "totalShards": 10000
     }
   }
 }

ufc/flags-v1.json

@@ -410,6 +410,77 @@
       ],
       "totalShards": 10000
     },
+    "empty_string_flag": {
+      "key": "empty_string_flag",
+      "enabled": true,
+      "comment": "Testing the empty string as a variation value",
+      "variationType": "STRING",
+      "variations": {
+        "empty_string": {
+          "key": "empty_string",
+          "value": ""
+        },
+        "non_empty": {
+          "key": "non_empty",
+          "value": "non_empty"
+        }
+      },
+      "allocations": [
+        {
+          "key": "allocation-empty",
+          "rules": [
+            {
+              "conditions": [
+                {
+                  "attribute": "country",
+                  "operator": "MATCHES",
+                  "value": "US"
+                }
+              ]
+            }
+          ],
+          "splits": [
+            {
+              "variationKey": "empty_string",
+              "shards": [
+                {
+                  "salt": "allocation-empty-shards",
+                  "ranges": [
+                    {
+                      "start": 0,
+                      "end": 10000
+                    }
+                  ]
+                }
+              ]
+            }
+          ],
+          "doLog": true
+        },
+        {
+          "key": "allocation-test",
+          "rules": [],
+          "splits": [
+            {
+              "variationKey": "non_empty",
+              "shards": [
+                {
+                  "salt": "allocation-empty-shards",
+                  "ranges": [
+                    {
+                      "start": 0,
+                      "end": 10000
+                    }
+                  ]
+                }
+              ]
+            }
+          ],
+          "doLog": true
+        }
+      ],
+      "totalShards": 10000
+    },
     "kill-switch": {
       "key": "kill-switch",
       "enabled": true,

ufc/tests/test-case-flag-with-empty-string.json

@@ -0,0 +1,73 @@
+{
+  "flag": "empty_string_flag",
+  "variationType": "STRING",
+  "defaultValue": "default",
+  "subjects": [
+    {
+      "subjectKey": "alice",
+      "subjectAttributes": {
+        "country": "US"
+      },
+      "assignment": "",
+      "evaluationDetails": {
+        "environmentName": "Test",
+        "flagEvaluationCode": "MATCH",
+        "flagEvaluationDescription": "Supplied attributes match rules defined in allocation \"allocation-empty\".",
+        "banditKey": null,
+        "banditAction": null,
+        "variationKey": "empty_string",
+        "variationValue": "",
+        "matchedRule": {
+          "conditions": [
+            {
+              "attribute": "country",
+              "operator": "MATCHES",
+              "value": "US"
+            }
+          ]
+        },
+        "matchedAllocation": {
+          "key": "allocation-empty",
+          "allocationEvaluationCode": "MATCH",
+          "orderPosition": 1
+        },
+        "unmatchedAllocations": [],
+        "unevaluatedAllocations": [
+          {
+            "allocationEvaluationCode": "UNEVALUATED",
+            "key": "allocation-test",
+            "orderPosition": 2
+          }
+        ]
+      }
+    },
+    {
+      "subjectKey": "bob",
+      "subjectAttributes": {},
+      "assignment": "non_empty",
+      "evaluationDetails": {
+        "environmentName": "Test",
+        "flagEvaluationCode": "MATCH",
+        "flagEvaluationDescription": "bob belongs to the range of traffic assigned to \"non_empty\" defined in allocation \"allocation-test\".",
+        "banditKey": null,
+        "banditAction": null,
+        "variationKey": "non_empty",
+        "variationValue": "non_empty",
+        "matchedRule": null,
+        "matchedAllocation": {
+          "key": "allocation-test",
+          "allocationEvaluationCode": "MATCH",
+          "orderPosition": 2
+        },
+        "unmatchedAllocations": [
+          {
+            "allocationEvaluationCode": "FAILING_RULE",
+            "key": "allocation-empty",
+            "orderPosition": 1
+          }
+        ],
+        "unevaluatedAllocations": []
+      }
+    }
+  ]
+}