Add test that asserts failure with message

src/compatTest/kotlin/io/github/gradlenexus/publishplugin/NexusPublishPluginTests.kt

@@ -24,6 +24,7 @@ import com.github.tomakehurst.wiremock.client.WireMock.get
 import com.github.tomakehurst.wiremock.client.WireMock.getRequestedFor
 import com.github.tomakehurst.wiremock.client.WireMock.matching
 import com.github.tomakehurst.wiremock.client.WireMock.matchingJsonPath
+import com.github.tomakehurst.wiremock.client.WireMock.notFound
 import com.github.tomakehurst.wiremock.client.WireMock.post
 import com.github.tomakehurst.wiremock.client.WireMock.postRequestedFor
 import com.github.tomakehurst.wiremock.client.WireMock.put
@@ -231,6 +232,47 @@ class NexusPublishPluginTests {
         assertUploadedToStagingRepo("/org/example/sample/0.0.1/sample-0.0.1.jar")
     }
 
+    @Test
+    fun `displays the error response to the user when a request fails`() {
+        projectDir.resolve("settings.gradle").write("""
+            rootProject.name = 'sample'
+        """)
+        projectDir.resolve("build.gradle").write("""
+            plugins {
+                id('java-library')
+                id('maven-publish')
+                id('io.github.gradle-nexus.publish-plugin')
+            }
+            group = 'org.example'
+            version = '0.0.1'
+            publishing {
+                publications {
+                    mavenJava(MavenPublication) {
+                        from(components.java)
+                    }
+                }
+            }
+            nexusPublishing {
+                repositories {
+                    myNexus {
+                        nexusUrl = uri('${server.baseUrl()}')
+                        snapshotRepositoryUrl = uri('${server.baseUrl()}/snapshots/')
+                        allowInsecureProtocol = true
+                        username = 'username'
+                        password = 'password'
+                    }
+                }
+            }
+        """)
+
+        stubMissingStagingProfileRequest("/staging/profiles")
+
+        val result = runAndFail("publishToMyNexus")
+
+        assertFailure(result, ":initializeMyNexusStagingRepository")
+        assertThat(result.output).contains("""{"failure":"message"}""")
+    }
+
     @Test
     fun `publishes to two Nexus repositories`(@MethodScopeWiremockResolver.MethodScopedWiremockServer @Wiremock otherServer: WireMockServer) {
         projectDir.resolve("settings.gradle").write("""
@@ -810,9 +852,11 @@ class NexusPublishPluginTests {
         """)
     }
 
-    private fun run(vararg arguments: String): BuildResult {
-        return gradleRunner(*arguments).build()
-    }
+    private fun run(vararg arguments: String): BuildResult =
+         gradleRunner(*arguments).build()
+
+    private fun runAndFail(vararg arguments: String): BuildResult =
+        gradleRunner(*arguments).buildAndFail()
 
     private fun gradleRunner(vararg arguments: String): GradleRunner {
         return gradleRunner
@@ -833,6 +877,12 @@ class NexusPublishPluginTests {
                 .willReturn(aResponse().withBody(gson.toJson(mapOf("data" to listOf(*stagingProfiles))))))
     }
 
+    private fun stubMissingStagingProfileRequest(url: String, wireMockServer: WireMockServer = server) {
+        wireMockServer.stubFor(get(urlEqualTo(url))
+                .withHeader("User-Agent", matching("gradle-nexus-publish-plugin/.*"))
+                .willReturn(notFound().withBody(gson.toJson(mapOf("failure" to "message")))))
+    }
+
     private fun stubCreateStagingRepoRequest(url: String, stagedRepositoryId: String, wireMockServer: WireMockServer = server) {
         wireMockServer.stubFor(post(urlEqualTo(url))
                 .willReturn(aResponse().withBody(gson.toJson(mapOf("data" to mapOf("stagedRepositoryId" to stagedRepositoryId))))))
@@ -903,6 +953,10 @@ class NexusPublishPluginTests {
         assertOutcome(result, taskPath, SUCCESS)
     }
 
+    private fun assertFailure(result: BuildResult, taskPath: String) {
+        assertOutcome(result, taskPath, FAILED)
+    }
+
     private fun assertSkipped(result: BuildResult, taskPath: String) {
         assertOutcome(result, taskPath, SKIPPED)
     }

src/main/kotlin/io/github/gradlenexus/publishplugin/internal/NexusClient.kt

@@ -133,11 +133,11 @@ open class NexusClient(private val baseUrl: URI, username: String?, password: St
     private fun failure(action: String, response: Response<*>): RuntimeException {
         var message = "Failed to $action, server at $baseUrl responded with status code ${response.code()}"
         val errorBody = response.errorBody()
-        if (errorBody != null && errorBody.contentLength() > 0) {
+        if (errorBody != null) {
             message += try {
                 ", body: ${errorBody.string()}"
             } catch (exception: IOException) {
-                ", body: (error during read body of error response, message: ${exception.message})"
+                ", body: <error while reading body of error response, message: ${exception.message}>"
             }
         }
         return RuntimeException(message)