Fix crash on invalid custom GTFS URL

Author: jdamcd

macOS/Arrivals.xcodeproj/project.pbxproj

@@ -468,7 +468,7 @@
 				"CODE_SIGN_IDENTITY[sdk=macosx*]" = "-";
 				CODE_SIGN_STYLE = Manual;
 				COMBINE_HIDPI_IMAGES = YES;
-				CURRENT_PROJECT_VERSION = 4;
+				CURRENT_PROJECT_VERSION = 5;
 				DEAD_CODE_STRIPPING = YES;
 				DEVELOPMENT_ASSET_PATHS = "\"Arrivals/Preview Content\"";
 				DEVELOPMENT_TEAM = "";
@@ -486,7 +486,7 @@
 					"$(inherited)",
 					"@executable_path/../Frameworks",
 				);
-				MARKETING_VERSION = 0.4;
+				MARKETING_VERSION = 0.5;
 				OTHER_LDFLAGS = (
 					"$(inherited)",
 					"-framework",
@@ -511,7 +511,7 @@
 				"CODE_SIGN_IDENTITY[sdk=macosx*]" = "-";
 				CODE_SIGN_STYLE = Manual;
 				COMBINE_HIDPI_IMAGES = YES;
-				CURRENT_PROJECT_VERSION = 4;
+				CURRENT_PROJECT_VERSION = 5;
 				DEAD_CODE_STRIPPING = YES;
 				DEVELOPMENT_ASSET_PATHS = "\"Arrivals/Preview Content\"";
 				DEVELOPMENT_TEAM = "";
@@ -530,7 +530,7 @@
 					"$(inherited)",
 					"@executable_path/../Frameworks",
 				);
-				MARKETING_VERSION = 0.4;
+				MARKETING_VERSION = 0.5;
 				OTHER_LDFLAGS = (
 					"$(inherited)",
 					"-framework",

shared/src/commonMain/kotlin/com/jdamcd/arrivals/gtfs/GtfsArrivals.kt

@@ -31,16 +31,20 @@ internal class GtfsArrivals(
                 throw NoDataException("No arrivals found")
             }
         } catch (e: Exception) {
-            throw NoDataException("No connection")
+            throw NoDataException("Failed to connect")
         }
     }
 
     private suspend fun updateStops() {
-        if (!hasFreshStops()) {
-            stops = GtfsStops(api.downloadStops(settings.gtfsSchedule))
-            settings.gtfsStopsUpdated = clock.now().epochSeconds
-        } else if (!::stops.isInitialized) {
-            stops = GtfsStops(api.readStops())
+        try {
+            if (!hasFreshStops()) {
+                stops = GtfsStops(api.downloadStops(settings.gtfsSchedule))
+                settings.gtfsStopsUpdated = clock.now().epochSeconds
+            } else if (!::stops.isInitialized) {
+                stops = GtfsStops(api.readStops())
+            }
+        } catch (e: Exception) {
+            throw NoDataException("Failed to load stops")
         }
     }
 

shared/src/jvmTest/kotlin/com/jdamcd/arrivals/gtfs/GtfsArrivalsTest.kt

@@ -98,4 +98,14 @@ class GtfsArrivalsTest {
         coVerify { api.downloadStops("schedule_url") }
         latest.arrivals shouldHaveSize 3
     }
+
+    @Test
+    fun `throws NoDataException if stops fail to load`() = runBlocking<Unit> {
+        every { clock.now() } returns Instant.fromEpochSeconds(fetchTime)
+        coEvery { api.downloadStops("schedule_url") } throws Exception()
+
+        assertFailsWith<NoDataException> {
+            arrivals.latest()
+        }
+    }
 }