fix(declarative) withCredentails usernamePassword mocking conflict

src/main/groovy/com/lesfurets/jenkins/unit/declarative/DeclarativePipelineTest.groovy

@@ -16,6 +16,19 @@ abstract class DeclarativePipelineTest extends BasePipelineTest {
         addParam(desc.name, desc.defaultValue, false)
     }
 
+    def stringInterceptor = { Map desc->
+        if (desc) {
+            // we are in context of paremetes { string(...)}
+            if (desc.name) {
+                addParam(desc.name, desc.defaultValue, false)
+            }
+            // we are in context of withCredentaials([string()..]) { }
+            if(desc.variable) {
+                return desc.variable
+            }
+        }
+    }
+
     @Override
     void setUp() throws Exception {
         super.setUp()
@@ -29,10 +42,9 @@ abstract class DeclarativePipelineTest extends BasePipelineTest {
         helper.registerAllowedMethod('pollSCM', [String])
         helper.registerAllowedMethod('script', [Closure])
         helper.registerAllowedMethod('skipDefaultCheckout')
-        helper.registerAllowedMethod('string', [Map], paramInterceptor)
+        helper.registerAllowedMethod('string', [Map], stringInterceptor)
         helper.registerAllowedMethod('timeout', [Integer, Closure])
         helper.registerAllowedMethod('timestamps')
-        helper.registerAllowedMethod('usernamePassword', [Map], { creds -> return creds })
         binding.setVariable('credentials', [:])
         binding.setVariable('params', [:])
     }

src/test/groovy/com/lesfurets/jenkins/unit/declarative/TestDeclaraticeWithCredentials.groovy

@@ -0,0 +1,43 @@
+package com.lesfurets.jenkins.unit.declarative
+
+import com.lesfurets.jenkins.unit.declarative.DeclarativePipelineTest
+import org.junit.Before
+import org.junit.Test
+
+import static org.junit.Assert.assertTrue
+
+class TestDeclaraticeWithCredentials extends DeclarativePipelineTest {
+
+    @Override
+    @Before
+    void setUp() throws Exception {
+        scriptRoots += 'src/test/jenkins/jenkinsfiles'
+        scriptExtension = ''
+        super.setUp()
+    }
+
+    @Test
+    void should_run_script_with_credentials() {
+        // when:
+        runScript("withCredentials_Jenkinsfile")
+
+        // then:
+        assertJobStatusSuccess()
+        assertCallStack().contains("echo(User/Pass = user/pass)")
+        assertCallStack().contains("echo(Nested User/Pass = user/pass)")
+        assertCallStack().contains("echo(Restored User/Pass = user/pass)")
+        assertCallStack().contains("echo(Cleared User/Pass = null/null)")
+
+        assertCallStack().contains("echo(Docker = docker_pass)")
+        assertCallStack().contains("echo(Nested Docker = docker_pass)")
+        assertCallStack().contains("echo(Restored Docker = docker_pass)")
+        assertCallStack().contains("echo(Cleared Docker = null)")
+
+        assertCallStack().contains("echo(SSH = ssh_pass)")
+        assertCallStack().contains("echo(Nested SSH = ssh_pass)")
+        assertCallStack().contains("echo(Restored SSH = ssh_pass)")
+        assertCallStack().contains("echo(Cleared SSH = null)")
+
+
+    }
+}

src/test/groovy/com/lesfurets/jenkins/unit/declarative/TestDeclarativePipeline.groovy

@@ -8,7 +8,7 @@ class TestDeclarativePipeline extends DeclarativePipelineTest {
     @Before
     @Override
     void setUp() throws Exception {
-        scriptRoots = ['src/test/jenkins/jenkinsfiles']
+        scriptRoots += 'src/test/jenkins/jenkinsfiles'
         scriptExtension = ''
         super.setUp()
     }

src/test/groovy/com/lesfurets/jenkins/unit/declarative/TestDockerAgentInStep.groovy

@@ -8,12 +8,14 @@ class TestDockerAgentInStep extends DeclarativePipelineTest {
     @Before
     @Override
     void setUp() throws Exception {
+        scriptRoots += 'src/test/jenkins/jenkinsfiles'
+        scriptExtension = ''
         super.setUp()
     }
 
     @Test
     void test_example() {
-        runScript("src/test/jenkins/jenkinsfiles/Docker_agentInStep_JenkinsFile")
+        runScript("Docker_agentInStep_JenkinsFile")
         assertJobStatusSuccess()
     }
 }

src/test/jenkins/jenkinsfiles/withCredentials_Jenkinsfile

@@ -0,0 +1,40 @@
+
+pipeline {
+    agent any
+    stages {
+        stage("run") {
+            withCredentials([
+                usernamePassword( credentialsId: 'my_cred_id', usernameVariable: 'user', passwordVariable: 'pass' ),
+                string( credentialsId: 'docker_cred', variable: 'docker_pass' ),
+                string( credentialsId: 'ssh_cred', variable: 'ssh_pass' )
+            ]) {
+                // Ensure values are set on entry
+                echo "User/Pass = $user/$pass"
+                echo "Docker = $docker_pass"
+                echo "SSH = $ssh_pass"
+
+                withCredentials([
+                    usernamePassword( credentialsId: 'my_cred_id', usernameVariable: 'user', passwordVariable: 'pass' ),
+                    string( credentialsId: 'docker_cred', variable: 'docker_pass' ),
+                    string( credentialsId: 'ssh_cred', variable: 'ssh_pass' )
+                ]) {
+                    // Ensure nested values are in place
+                    echo "Nested User/Pass = $user/$pass"
+                    echo "Nested Docker = $docker_pass"
+                    echo "Nested SSH = $ssh_pass"
+                }
+
+            // Ensure original values are restored
+            echo "Restored User/Pass = $user/$pass"
+            echo "Restored Docker = $docker_pass"
+            echo "Restored SSH = $ssh_pass"
+        }
+
+        // Ensure original state where the values are not set
+        echo "Cleared User/Pass = $user/$pass"
+        echo "Cleared Docker = $docker_pass"
+        echo "Cleared SSH = $ssh_pass"
+        }
+    }
+}
+