problem: separate tests are not usable in the current state, better to work on improving unit tests

src/test/groovy/io/emeraldpay/dshackle/upstream/signature/EcdsaSignerSpec.groovy

@@ -49,7 +49,7 @@ class EcdsaSignerSpec extends Specification {
         setup:
         def conf = new SignatureConfig()
         conf.enabled = true
-        conf.privateKey = "testing/dshackle/test_key"
+        conf.privateKey = "src/test/resources/signer/test_key"
         def signer = new ResponseSignerFactory(conf).getObject() as EcdsaSigner
 
         // To verify the test, check the hash of test key above:
@@ -114,7 +114,7 @@ class EcdsaSignerSpec extends Specification {
 
         def conf = new SignatureConfig()
         conf.enabled = true
-        conf.privateKey = "testing/dshackle/test_key"
+        conf.privateKey = "src/test/resources/signer/test_key"
         def factory = new ResponseSignerFactory(conf)
 
         def sk = factory.readKey(conf.algorithm, conf.privateKey).first

src/test/resources/signer/test_key

@@ -0,0 +1,5 @@
+-----BEGIN PRIVATE KEY-----
+MIGHAgEAMBMGByqGSM49AgEGCCqGSM49AwEHBG0wawIBAQQgWz2Pxo+O3UAWFLqJ
+BMLoT8VtWNXn4FHb+VMiyrn0sfehRANCAAR7z21AewiDegaV/4zBkBbNWGOSg1Zo
+tE6HGCLMMuKP0XmOg2jVoIvnHJ1OZCIKb236HwnogF4G+o/qlCTi90P1
+-----END PRIVATE KEY-----

src/test/resources/signer/test_key.pub

@@ -0,0 +1,4 @@
+-----BEGIN PUBLIC KEY-----
+MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEe89tQHsIg3oGlf+MwZAWzVhjkoNW
+aLROhxgizDLij9F5joNo1aCL5xydTmQiCm9t+h8J6IBeBvqP6pQk4vdD9Q==
+-----END PUBLIC KEY-----