feat!: offline file an own resolver (#195)

Signed-off-by: Simon Schrottner <simon.schrottner@dynatrace.com>

gherkin/config.feature

@@ -24,52 +24,51 @@ Feature: Configuration Test
   | contextEnricher       | -                              | sync-metadata to evaluation context mapping function                            | function                     | identity function             | in-process          |
   """
 
-  @rpc @in-process
   Scenario Outline: Default Config
     When a config was initialized
     Then the option "<option>" of type "<type>" should have the value "<default>"
+
+    @rpc @in-process @file
     Scenarios: Basic
-      | option     | type         | default   |
-      | resolver   | ResolverType | rpc       |
-      | host       | String       | localhost |
-      | port       | Integer      | 8013      |
-      | tls        | Boolean      | false     |
-      | deadlineMs | Integer      | 500       |
-    @targetURI
+      | option     | type         | default |
+      | resolver   | ResolverType | rpc     |
+      | deadlineMs | Integer      | 500     |
+    @rpc @in-process
+    Scenarios: Basic Connection
+      | option | type    | default   |
+      | host   | String  | localhost |
+      | port   | Integer | 8013      |
+      | tls    | Boolean | false     |
+    @rpc @in-process @targetURI
     Scenarios: Target URI
       | option    | type   | default |
       | targetUri | String | null    |
-    @customCert
+    @rpc @in-process @customCert
     Scenarios: Certificates
       | option   | type   | default |
       | certPath | String | null    |
-    @unixsocket
+    @rpc @in-process @unixsocket
     Scenarios: Unixsocket
       | option     | type   | default |
       | socketPath | String | null    |
-    @events
+    @rpc @in-process @stream
     Scenarios: Events
       | option            | type    | default |
       | streamDeadlineMs  | Integer | 600000  |
       | keepAliveTime     | Long    | 0       |
       | retryBackoffMs    | Integer | 1000    |
       | retryBackoffMaxMs | Integer | 120000  |
       | retryGracePeriod  | Integer | 5       |
-    @sync
+    @in-process @sync
     Scenarios: Sync
-      | option            | type    | default |
-      | streamDeadlineMs  | Integer | 600000  |
-      | keepAliveTime     | Long    | 0       |
-      | retryBackoffMs    | Integer | 1000    |
-      | retryBackoffMaxMs | Integer | 120000  |
-      | retryGracePeriod  | Integer | 5       |
-      | selector          | String  | null    |
-    @caching
+      | option   | type   | default |
+      | selector | String | null    |
+    @rpc @caching
     Scenarios: caching
       | option       | type      | default |
       | cache        | CacheType | lru     |
       | maxCacheSize | Integer   | 1000    |
-    @offline
+    @file
     Scenarios: offline
       | option                | type    | default |
       | offlineFlagSourcePath | String  | null    |
@@ -93,161 +92,208 @@ Feature: Configuration Test
       | option | type    | default |
       | port   | Integer | 8015    |
 
-  @rpc @in-process
+  @file
+  Scenario Outline: File Backwards compatibility
+    Given an option "resolver" of type "ResolverType" with value "<resolverSet>"
+    And an option "offlineFlagSourcePath" of type "String" with value "some-path"
+    When a config was initialized
+    Then the option "resolver" of type "ResolverType" should have the value "<resolverExpected>"
+    Scenarios:
+      | resolverSet | resolverExpected |
+      | in-process  | file             |
+      | rpc         | rpc              |
+      | file        | file             |
+
+  @file
+  Scenario: Default Config File
+    Given an option "resolver" of type "ResolverType" with value "file"
+    When a config was initialized
+    Then we should have an error
+
   Scenario Outline: Dedicated Config
     Given an option "<option>" of type "<type>" with value "<value>"
     When a config was initialized
     Then the option "<option>" of type "<type>" should have the value "<value>"
-    Scenarios:
+
+    @rpc @in-process @file
+    Scenarios: Basic
       | option     | type         | value      |
       | resolver   | ResolverType | in-process |
-      | host       | String       | local      |
-      | tls        | Boolean      | True       |
-      | port       | Integer      | 1234       |
       | deadlineMs | Integer      | 123        |
-    @targetURI
+    @rpc @in-process
+    Scenarios: Basic Connection
+      | option | type    | value |
+      | host   | String  | local |
+      | tls    | Boolean | True  |
+      | port   | Integer | 1234  |
+
+    @rpc @in-process @targetURI
     Scenarios: Target URI
       | option    | type   | value |
       | targetUri | String | path  |
-    @customCert
+
+    @rpc @in-process @customCert
     Scenarios: Custom Certificate
       | option   | type   | value |
       | certPath | String | path  |
-    @unixsocket
+
+    @rpc @in-process @unixsocket
     Scenarios: Unixsocket
       | option     | type   | value |
       | socketPath | String | path  |
-    @events
-    Scenarios: events
+
+    @rpc @in-process @stream
+    Scenarios: Stream
       | option            | type    | value  |
       | streamDeadlineMs  | Integer | 500000 |
       | keepAliveTime     | Long    | 5      |
       | retryBackoffMs    | Integer | 5000   |
       | retryBackoffMaxMs | Integer | 12000  |
       | retryGracePeriod  | Integer | 10     |
-    @sync
-    Scenarios: sync
-      | option            | type    | value    |
-      | streamDeadlineMs  | Integer | 500000   |
-      | keepAliveTime     | Long    | 5        |
-      | retryBackoffMs    | Integer | 5000     |
-      | retryBackoffMaxMs | Integer | 12000    |
-      | retryGracePeriod  | Integer | 10       |
-      | selector          | String  | selector |
-    @caching
+
+    @in-process @sync
+    Scenarios: Selector
+      | option   | type   | value    |
+      | selector | String | selector |
+    @rpc @caching
     Scenarios: caching
       | option       | type      | value    |
       | cache        | CacheType | disabled |
       | maxCacheSize | Integer   | 1236     |
-    @offline
+    @file
     Scenarios: offline
       | option                | type    | value |
       | offlineFlagSourcePath | String  | path  |
       | offlinePollIntervalMs | Integer | 1000  |
 
-  @rpc @in-process
   Scenario Outline: Dedicated Config via Env_var
     Given an environment variable "<env>" with value "<value>"
     When a config was initialized
     Then the option "<option>" of type "<type>" should have the value "<value>"
-    Scenarios:
+
+    @rpc @in-process @file
+    Scenarios: Basic
       | option     | env               | type         | value      |
       | resolver   | FLAGD_RESOLVER    | ResolverType | in-process |
       | resolver   | FLAGD_RESOLVER    | ResolverType | IN-PROCESS |
       | resolver   | FLAGD_RESOLVER    | ResolverType | rpc        |
       | resolver   | FLAGD_RESOLVER    | ResolverType | RPC        |
-      | host       | FLAGD_HOST        | String       | local      |
-      | tls        | FLAGD_TLS         | Boolean      | True       |
-      | port       | FLAGD_PORT        | Integer      | 1234       |
       | deadlineMs | FLAGD_DEADLINE_MS | Integer      | 123        |
-    @targetURI
+
+    @rpc @in-process
+    Scenarios: Basic Connection
+      | option | env        | type    | value |
+      | host   | FLAGD_HOST | String  | local |
+      | tls    | FLAGD_TLS  | Boolean | True  |
+      | port   | FLAGD_PORT | Integer | 1234  |
+
+    @rpc @in-process @targetURI
     Scenarios: Target URI
       | option    | env              | type   | value |
       | targetUri | FLAGD_TARGET_URI | String | path  |
-    @customCert
+
+    @rpc @in-process @customCert
     Scenarios: Custom Certificates
       | option   | env                    | type   | value |
       | certPath | FLAGD_SERVER_CERT_PATH | String | path  |
-    @unixsocket
+
+    @rpc @in-process @unixsocket
     Scenarios: Unixsocket
       | option     | env               | type   | value |
       | socketPath | FLAGD_SOCKET_PATH | String | path  |
-    @events
-    Scenarios: Events
+
+    @rpc @in-process @stream
+    Scenarios: Stream
       | option            | env                        | type    | value  |
       | streamDeadlineMs  | FLAGD_STREAM_DEADLINE_MS   | Integer | 500000 |
       | keepAliveTime     | FLAGD_KEEP_ALIVE_TIME_MS   | Long    | 5      |
       | retryBackoffMs    | FLAGD_RETRY_BACKOFF_MS     | Integer | 5000   |
       | retryBackoffMaxMs | FLAGD_RETRY_BACKOFF_MAX_MS | Integer | 12000  |
       | retryGracePeriod  | FLAGD_RETRY_GRACE_PERIOD   | Integer | 10     |
-    @sync
+
+    @in-process @sync
     Scenarios: Sync
-      | option            | env                        | type    | value    |
-      | streamDeadlineMs  | FLAGD_STREAM_DEADLINE_MS   | Integer | 500000   |
-      | keepAliveTime     | FLAGD_KEEP_ALIVE_TIME_MS   | Long    | 5        |
-      | retryBackoffMs    | FLAGD_RETRY_BACKOFF_MS     | Integer | 5000     |
-      | retryBackoffMaxMs | FLAGD_RETRY_BACKOFF_MAX_MS | Integer | 12000    |
-      | retryGracePeriod  | FLAGD_RETRY_GRACE_PERIOD   | Integer | 10       |
-      | selector          | FLAGD_SOURCE_SELECTOR      | String  | selector |
-    @caching
+      | option   | env                   | type   | value    |
+      | selector | FLAGD_SOURCE_SELECTOR | String | selector |
+
+    @rpc @caching
     Scenarios: Caching
       | option       | env                  | type      | value    |
       | cache        | FLAGD_CACHE          | CacheType | disabled |
       | maxCacheSize | FLAGD_MAX_CACHE_SIZE | Integer   | 1236     |
-    @offline
+    @file
     Scenarios: Offline
       | option                | env                            | type    | value |
       | offlineFlagSourcePath | FLAGD_OFFLINE_FLAG_SOURCE_PATH | String  | path  |
       | offlinePollIntervalMs | FLAGD_OFFLINE_POLL_MS          | Integer | 1000  |
 
-  @rpc @in-process
+  @file
+  Scenario Outline: Dedicated Config via Env_var special file case
+    Given an environment variable "<env>" with value "<value>"
+    And an option "offlineFlagSourcePath" of type "String" with value "some-path"
+    When a config was initialized
+    Then the option "<option>" of type "<type>" should have the value "<value>"
+
+    Scenarios: Basic
+      | option   | env            | type         | value |
+      | resolver | FLAGD_RESOLVER | ResolverType | file  |
+      | resolver | FLAGD_RESOLVER | ResolverType | FILE  |
+
   Scenario Outline: Dedicated Config via Env_var and set
     Given an environment variable "<env>" with value "<env-value>"
     And an option "<option>" of type "<type>" with value "<value>"
     When a config was initialized
     Then the option "<option>" of type "<type>" should have the value "<value>"
-    Scenarios:
+
+    @rpc @in-process @file
+    Scenarios: Basic
       | option     | env               | type         | value      | env-value |
       | resolver   | FLAGD_RESOLVER    | ResolverType | in-process | rpc       |
-      | host       | FLAGD_HOST        | String       | local      | l         |
-      | tls        | FLAGD_TLS         | Boolean      | True       | False     |
-      | port       | FLAGD_PORT        | Integer      | 1234       | 3456      |
       | deadlineMs | FLAGD_DEADLINE_MS | Integer      | 123        | 345       |
-    @targetURI
+
+    @rpc @in-process
+    Scenarios: Basic Connection
+      | option | env        | type    | value | env-value |
+      | host   | FLAGD_HOST | String  | local | l         |
+      | tls    | FLAGD_TLS  | Boolean | True  | False     |
+      | port   | FLAGD_PORT | Integer | 1234  | 3456      |
+
+    @rpc @in-process @targetURI
     Scenarios: Target URI
       | option    | env              | type   | value | env-value |
       | targetUri | FLAGD_TARGET_URI | String | path  | fun       |
-    @customCert
+
+    @rpc @in-process @customCert
     Scenarios: Custom Certificates
       | option   | env                    | type   | value | env-value |
       | certPath | FLAGD_SERVER_CERT_PATH | String | path  | rpc       |
-    @unixsocket
+
+    @rpc @in-process @unixsocket
     Scenarios: Unixsocket
       | option     | env               | type   | value | env-value |
       | socketPath | FLAGD_SOCKET_PATH | String | path  | rpc       |
-    @events
-    Scenarios: Events
+
+    @rpc @in-process @stream
+    Scenarios: Stream
       | option            | env                        | type    | value  | env-value |
       | streamDeadlineMs  | FLAGD_STREAM_DEADLINE_MS   | Integer | 500000 | 400       |
       | keepAliveTime     | FLAGD_KEEP_ALIVE_TIME_MS   | Long    | 5      | 4         |
       | retryBackoffMs    | FLAGD_RETRY_BACKOFF_MS     | Integer | 5000   | 4         |
       | retryBackoffMaxMs | FLAGD_RETRY_BACKOFF_MAX_MS | Integer | 12000  | 4         |
       | retryGracePeriod  | FLAGD_RETRY_GRACE_PERIOD   | Integer | 10     | 4         |
-    @sync
+
+    @rpc @in-process @sync
     Scenarios: Sync
-      | option            | env                        | type    | value    | env-value |
-      | streamDeadlineMs  | FLAGD_STREAM_DEADLINE_MS   | Integer | 500000   | 400       |
-      | keepAliveTime     | FLAGD_KEEP_ALIVE_TIME_MS   | Long    | 5        | 4         |
-      | retryBackoffMs    | FLAGD_RETRY_BACKOFF_MS     | Integer | 5000     | 4         |
-      | retryBackoffMaxMs | FLAGD_RETRY_BACKOFF_MAX_MS | Integer | 12000    | 4         |
-      | retryGracePeriod  | FLAGD_RETRY_GRACE_PERIOD   | Integer | 10       | 4         |
-      | selector          | FLAGD_SOURCE_SELECTOR      | String  | selector | sele      |
-    @caching
+      | option   | env                   | type   | value    | env-value |
+      | selector | FLAGD_SOURCE_SELECTOR | String | selector | sele      |
+
+    @rpc @caching
     Scenarios: Caching
       | option       | env                  | type      | value    | env-value |
       | cache        | FLAGD_CACHE          | CacheType | disabled | lru       |
       | maxCacheSize | FLAGD_MAX_CACHE_SIZE | Integer   | 1236     | 2345      |
-    @offline
+
+    @file
     Scenarios: Offline
       | option                | env                            | type    | value | env-value |
       | offlineFlagSourcePath | FLAGD_OFFLINE_FLAG_SOURCE_PATH | String  | path  | lll       |

gherkin/connection.feature

@@ -1,4 +1,4 @@
-@rpc @in-process
+@rpc @in-process @file
 Feature: flagd provider disconnect and reconnect functionality
 
   Scenario Outline: Connection
@@ -51,6 +51,7 @@ Feature: flagd provider disconnect and reconnect functionality
     #      | name   |
     #      | socket |
 
+  @unavailable
   Scenario: Provider unavailable
     Given an option "deadlineMs" of type "Integer" with value "1000"
     And a unavailable flagd provider

gherkin/evaluation.feature

@@ -1,4 +1,4 @@
-@rpc @in-process
+@rpc @in-process @file
 Feature: flagd evaluations
 
   # This test suite contains scenarios to test flagd providers.

gherkin/events.feature

@@ -1,4 +1,4 @@
-@rpc @in-process
+@rpc @in-process @file @events
 Feature: Flagd Provider State Changes
 
   Background: