test: give ability to run tests against a single feature (#88)

* test: give ability to run tests against a single feature

* Add information about new test option '--feature' to run tests against single feature

---------

Co-authored-by: “Marcin <“[email protected]”>

Author: polok

README.md

@@ -374,10 +374,16 @@ $ swift run featurevisor test .
 
 If you are interested to see only the test specs that fail:
 
+```bash
+'--feature feature_key_xxx'
+```
+
+Only if you are interested to run tests only for specific feature:
+
 Example command:
 
 ```
-$ swift run featurevisor test --only-failures .
+$ swift run featurevisor test --only-failures --feature feature_key_xxx .
 ```
 
 ### Benchmarking

Sources/Featurevisor/Featurevisor.swift

@@ -165,6 +165,12 @@ extension Featurevisor {
         @Argument(help: "The path to features test directory.")
         var featuresTestDirectoryPath: String
 
+        @Option(
+            help:
+                "The option is used to specify the feature key which will be used for testing."
+        )
+        var feature: String?
+
         @Flag(help: "If you are interested to see only the test specs that fail.")
         var onlyFailures = false
 
@@ -176,10 +182,14 @@ extension Featurevisor {
             // TODO: Handle better, react on errors etc.
             Commands.Task.run("bash -c cd \(featuresTestDirectoryPath) && npx featurevisor build")
 
-            let testSuits = try loadAllFeatureTestSuits(
+            var testSuits = try loadAllFeatureTestSuits(
                 featuresTestDirectoryPath: featuresTestDirectoryPath
             )
 
+            if let feature {
+                testSuits = testSuits.filter { $0.feature == feature }
+            }
+
             let features = try loadAllFeatures(featuresTestDirectoryPath: featuresTestDirectoryPath)
 
             var totalTestSpecs = 0