remove index creation to fix a Datastore test (spring-attic#2192)

* remove index creation

Author: dmitry-s

spring-cloud-gcp-data-datastore/src/test/java/org/springframework/cloud/gcp/data/datastore/it/DatastoreIntegrationTests.java

@@ -16,11 +16,6 @@
 
 package org.springframework.cloud.gcp.data.datastore.it;
 
-import java.io.File;
-import java.io.IOException;
-import java.net.URISyntaxException;
-import java.net.URL;
-import java.nio.file.Paths;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
@@ -851,38 +846,20 @@ public void testPageableGqlEntityProjectionsSlice() {
 	}
 
 	@Test(timeout = 10000L)
-	public void testSliceString() throws IOException, URISyntaxException, InterruptedException {
-		createIndexAndRun(() -> {
+	public void testSliceString() {
+		try {
 			Slice<String> slice = this.testEntityRepository.getSliceStringBySize(2L, PageRequest.of(0, 3));
 
 			List<String> testEntityProjections = slice.get().collect(Collectors.toList());
 
 			assertThat(testEntityProjections).hasSize(1);
 			assertThat(testEntityProjections.get(0)).isEqualTo("blue");
-		});
-	}
-
-	private void createIndexAndRun(Runnable runnable) throws URISyntaxException, IOException, InterruptedException {
-		URL resource = this.getClass().getResource("/index.yaml");
-		File file = Paths.get(resource.toURI()).toFile();
-
-		Process process = new ProcessBuilder("gcloud", "datastore", "indexes", "create", file.getAbsolutePath(), "-q")
-				.start();
-
-		if (process.waitFor() != 0) {
-			throw new RuntimeException("Error while creating index.");
-		}
-
-		try {
-			runnable.run();
 		}
 		catch (DatastoreException e) {
 			if (e.getMessage().contains("no matching index found")) {
-				throw new RuntimeException(
-						"The required index is not found. "
-								+ "This test attempts to create it, but it might take a few minutes. "
-								+ "Retry this test later.",
-						e);
+				throw new RuntimeException("The required index is not found. " +
+						"The index could be created by running this command from 'resources' directory: " +
+						"'gcloud datastore indexes create index.yaml'");
 			}
 			throw e;
 		}