fix(java-cloud-bom): resolve snapshots during linkage checks and skip reachability checks for SNAPSHOTs

Author: jinseopkim0

java-cloud-bom/tests/src/test/java/com/google/cloud/BomContentTest.java

@@ -73,6 +73,9 @@ private void checkBom(Path bomPath) throws Exception {
     Bom bom = Bom.readBom(bomPath);
     List<Artifact> artifacts = bom.getManagedDependencies();
     for (Artifact artifact : artifacts) {
+      if (artifact.getVersion().contains("SNAPSHOT")) {
+        continue;
+      }
       assertReachable(buildMavenCentralUrl(artifact));
     }
 
@@ -98,6 +101,9 @@ static void checkBomReachable(Path bomPath) throws Exception {
 
     StringBuilder errors = new StringBuilder();
     for (Artifact artifact : artifacts) {
+      if (artifact.getVersion().contains("SNAPSHOT")) {
+        continue;
+      }
       try {
         assertReachable(buildMavenCentralUrl(artifact));
       } catch (IOException ex) {

java-cloud-bom/tests/src/test/java/com/google/cloud/MaximumLinkageErrorsTest.java

@@ -23,6 +23,7 @@
 import com.google.cloud.tools.opensource.classpath.LinkageChecker;
 import com.google.cloud.tools.opensource.classpath.LinkageProblem;
 import com.google.cloud.tools.opensource.dependencies.Bom;
+import com.google.cloud.tools.opensource.dependencies.DependencyGraphBuilder;
 import com.google.cloud.tools.opensource.dependencies.MavenRepositoryException;
 import com.google.cloud.tools.opensource.dependencies.RepositoryUtility;
 import com.google.cloud.tools.opensource.dependencies.UnresolvableArtifactProblem;
@@ -82,7 +83,12 @@ public void testForNewLinkageErrors()
   private LinkageChecker createLinkageChecker(Bom bom)
       throws InvalidVersionSpecificationException, IOException {
     ImmutableList<Artifact> managedDependencies = bom.getManagedDependencies();
-    ClassPathBuilder classPathBuilder = new ClassPathBuilder();
+    DependencyGraphBuilder graphBuilder =
+        new DependencyGraphBuilder(
+            ImmutableList.of(
+                "https://repo1.maven.org/maven2/",
+                "https://google.oss.sonatype.org/content/repositories/snapshots/"));
+    ClassPathBuilder classPathBuilder = new ClassPathBuilder(graphBuilder);
 
     // full: false to avoid fetching optional dependencies.
     ClassPathResult classPathResult =