Set VTXIntegrationImagen based on event_name

Author: andrewheard

.github/workflows/vertexai.yml

@@ -102,6 +102,7 @@ jobs:
     needs: spm-package-resolved
     env:
       TEST_RUNNER_FIRAAppCheckDebugToken: ${{ secrets.VERTEXAI_INTEGRATION_FAC_DEBUG_TOKEN }}
+      TEST_RUNNER_VTXIntegrationImagen: ${{ github.event_name == 'schedule' }}
       FIREBASECI_USE_LATEST_GOOGLEAPPMEASUREMENT: 1
       secrets_passphrase: ${{ secrets.GHASecretsGPGPassphrase1 }}
     steps:

FirebaseVertexAI/Tests/TestApp/Tests/Integration/IntegrationTests.swift

@@ -243,6 +243,12 @@ final class IntegrationTests: XCTestCase {
   // MARK: - Imagen
 
   func testGenerateImage_inlineData() async throws {
+    if let imagenEnvVar = ProcessInfo.processInfo.environment["VTXIntegrationImagen"] {
+      XCTFail("VTXIntegrationImagen: \(imagenEnvVar)")
+    } else {
+      XCTFail("VTXIntegrationImagen is undefined.")
+    }
+
     let imagePrompt = """
     A realistic photo of a male lion, mane thick and dark, standing proudly on a rocky outcrop
     overlooking a vast African savanna at sunset. Golden hour light, long shadows, sharp focus on