Add RemoveTag action (#5)

core/src/main/kotlin/com/cognifide/apmt/actions/tags/RemoveTag.kt

@@ -0,0 +1,23 @@
+package com.cognifide.apmt.actions.tags
+
+import com.cognifide.apmt.User
+import com.cognifide.apmt.actions.Action
+import com.cognifide.apmt.config.Instance
+import io.restassured.response.Response
+
+
+class RemoveTag(override val instance: Instance, override val user: User, override val path: String) : Action {
+    override fun prepare(): Response? {
+        return CreateTag(instance, instance.adminUser, path).execute()
+    }
+
+    override fun execute(): Response? {
+        return CreateTag(instance, user, path).undo()
+    }
+
+    override fun undo(): Response? = null
+
+    override fun successCode(): Int = 204
+
+    override fun failureCode(): Int = 500
+}

core/src/test/kotlin/com/cognifide/apmt/actions/tags/RemoveTagTest.kt

@@ -0,0 +1,64 @@
+package com.cognifide.apmt.actions.tags
+
+import com.cognifide.apmt.MOCK_SERVER
+import com.cognifide.apmt.TEST_ADMIN
+import com.cognifide.apmt.TEST_USER
+import com.cognifide.apmt.util.AemStub
+import com.cognifide.apmt.util.HumanReadableCamelCase
+import com.github.tomakehurst.wiremock.client.BasicCredentials
+import com.github.tomakehurst.wiremock.client.WireMock.*
+import org.junit.jupiter.api.Assertions.assertEquals
+import org.junit.jupiter.api.Assertions.assertNull
+import org.junit.jupiter.api.DisplayNameGeneration
+import org.junit.jupiter.api.Test
+
+const val TAG_PATH = "/removed-tag"
+
+@DisplayNameGeneration(HumanReadableCamelCase::class)
+class RemoveTagTest {
+    private val removeTag = RemoveTag(MOCK_SERVER, TEST_USER, TAG_PATH)
+
+    @Test
+    fun onSuccessReturns204() {
+        assertEquals(204, removeTag.successCode())
+    }
+
+    @Test
+    fun onFailureReturns500() {
+        assertEquals(500, removeTag.failureCode())
+    }
+
+    @Test
+    fun callingUndoDoesNothing() {
+        assertNull(removeTag.undo())
+    }
+
+    @Test
+    @AemStub
+    fun callingExecutePerformsDelete() {
+        stubFor(
+            delete(urlPathEqualTo(TAG_PATH))
+                .willReturn(ok())
+        )
+
+        removeTag.execute()
+
+        verify(deleteRequestedFor(urlPathEqualTo(TAG_PATH)))
+    }
+
+    @Test
+    @AemStub
+    fun callingPrepareCreatesTagWithAdminSession() {
+        stubFor(
+            post(urlPathEqualTo(TAG_PATH))
+                .willReturn(ok())
+        )
+
+        removeTag.prepare()
+
+        verify(
+            postRequestedFor(urlPathEqualTo(TAG_PATH))
+                .withBasicAuth(BasicCredentials(TEST_ADMIN.username, TEST_ADMIN.password))
+        )
+    }
+}