From 8ef09d96beda7264d3ffbb0651156f34687ffe59 Mon Sep 17 00:00:00 2001
From: Marek Skacelik <marek.skacelik@gmail.com>
Date: Mon, 24 Feb 2025 15:02:30 +0100
Subject: [PATCH] Added more meaningful error message when config file not
 found in repository, with test

---
 .../org/wildfly/bot/LifecycleProcessor.java   |  7 +++-
 .../org/wildfly/bot/StartupEventTest.java     | 36 +++++++++++++++++--
 2 files changed, 39 insertions(+), 4 deletions(-)

diff --git a/src/main/java/org/wildfly/bot/LifecycleProcessor.java b/src/main/java/org/wildfly/bot/LifecycleProcessor.java
index 953da77..5a68d08 100644
--- a/src/main/java/org/wildfly/bot/LifecycleProcessor.java
+++ b/src/main/java/org/wildfly/bot/LifecycleProcessor.java
@@ -72,7 +72,12 @@ void onStart(@Observes StartupEvent event) {
                 for (GHRepository repository : app.getInstallation().listRepositories()) {
                     try {
                         WildFlyConfigFile wildflyBotConfigFile = fileProvider.fetchConfigFile(repository,
-                                RuntimeConstants.CONFIG_FILE_NAME, ConfigFile.Source.DEFAULT, WildFlyConfigFile.class).get();
+                                RuntimeConstants.CONFIG_FILE_NAME, ConfigFile.Source.DEFAULT, WildFlyConfigFile.class)
+                                .orElseThrow(
+                                        () -> new IllegalStateException(
+                                                "Unable to read file %s for repository %s. Either the file does not exist or the 'Contents' permission has not been set for the application."
+                                                        .formatted(".github/" + RuntimeConstants.CONFIG_FILE_NAME,
+                                                                repository.getFullName())));
                         List<String> emailAddresses = wildflyBotConfigFile.wildfly.emails;
                         List<String> problems = configFileChangeProcessor.validateFile(wildflyBotConfigFile, repository);
 
diff --git a/src/test/java/org/wildfly/bot/StartupEventTest.java b/src/test/java/org/wildfly/bot/StartupEventTest.java
index 351dc8d..a600bc0 100644
--- a/src/test/java/org/wildfly/bot/StartupEventTest.java
+++ b/src/test/java/org/wildfly/bot/StartupEventTest.java
@@ -98,9 +98,13 @@ private class CustomGithubMockSetup implements GitHubMockSetup {
         private final String configFile;
         private final Consumer<GitHubMockSetupContext> additionalMocking;
 
+        // no config file (wildfly-bot.yml) was provided
+        private CustomGithubMockSetup() {
+            this(null);
+        }
+
         private CustomGithubMockSetup(String configFile) {
-            this.configFile = configFile;
-            this.additionalMocking = null;
+            this(configFile, null);
         }
 
         private CustomGithubMockSetup(String configFile, Consumer<GitHubMockSetupContext> additionalMocking) {
@@ -118,7 +122,9 @@ public void setup(GitHubMockSetupContext mocks) throws Throwable {
             GHAuthenticatedAppInstallation mockGHAuthenticatedAppInstallation = mock(GHAuthenticatedAppInstallation.class);
             PagedSearchIterable<GHRepository> mockGHRepositories = mock(PagedSearchIterable.class);
             PagedIterator<GHRepository> mockIterator = mock(PagedIterator.class);
-            mocks.configFile(RuntimeConstants.CONFIG_FILE_NAME).fromString(configFile);
+            if (configFile != null) {
+                mocks.configFile(RuntimeConstants.CONFIG_FILE_NAME).fromString(configFile);
+            }
 
             GHRepository repo = mocks.repository(TestConstants.TEST_REPO);
 
@@ -319,4 +325,28 @@ public void testCreateOneMissingLabelsLabel() throws IOException {
                     verify(repository, never()).createLabel(eq(LABEL_FIX_ME), anyString());
                 });
     }
+
+    @Test
+    public void testMissingConfigFile() {
+        final String expectedErrorLog = "Unable to retrieve or parse the configuration file from the repository %s";
+        final String expectedExceptionMessage = "Unable to read file .github/wildfly-bot.yml for repository";
+
+        given().github(new CustomGithubMockSetup())
+                .when().payloadFromString(ssePullRequestPayload.jsonString())
+                .event(GHEvent.STAR);
+
+        Assertions.assertTrue(inMemoryLogHandler.getRecords().stream().anyMatch(
+                logRecord -> logRecord.getMessage().equals(expectedErrorLog)
+                        && assertThrowable(logRecord.getThrown(), IllegalStateException.class, expectedExceptionMessage)));
+
+    }
+
+    private boolean assertThrowable(Throwable throwable, Class<? extends Throwable> expectedExceptionClass,
+            String expectedMessage) {
+        Assertions.assertEquals(expectedExceptionClass, throwable.getClass());
+        Assertions.assertTrue(throwable.getMessage().contains(expectedMessage),
+                "Expected message: \n%s\nwas not found in the throwable message: \n%s\n".formatted(expectedMessage,
+                        throwable.getMessage()));
+        return true; // for lazy evaluation of .anyMatch()
+    }
 }
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