Add tokens to AsPattern interface

Author: andreaguarino

python-frontend/src/main/java/org/sonar/plugins/python/api/tree/AsPattern.java

@@ -31,5 +31,7 @@ public interface AsPattern extends Pattern {
 
   Pattern pattern();
 
+  Token asKeyword();
+
   Name alias();
 }

python-frontend/src/main/java/org/sonar/python/tree/AsPatternImpl.java

@@ -44,6 +44,11 @@ public Pattern pattern() {
     return pattern;
   }
 
+  @Override
+  public Token asKeyword() {
+    return asKeyword;
+  }
+
   @Override
   public Name alias() {
     return alias;

python-frontend/src/test/java/org/sonar/python/tree/PythonTreeMakerMatchStatementTest.java

@@ -150,15 +150,13 @@ public void or_pattern() {
 
   @Test
   public void as_pattern() {
-    setRootRule(PythonGrammar.CASE_BLOCK);
-    CaseBlock caseBlock = parse("case \"foo\" as x: ...", treeMaker::caseBlock);
-    AsPattern asPattern = (AsPattern) caseBlock.pattern();
+    AsPattern asPattern = pattern("case \"foo\" as x: ...");
     assertThat(asPattern.pattern()).isInstanceOf(LiteralPattern.class);
+    assertThat(asPattern.asKeyword().value()).isEqualTo("as");
     assertThat(asPattern.alias().name()).isEqualTo("x");
     assertThat(asPattern.children()).extracting(Tree::getKind).containsExactly(Kind.STRING_LITERAL_PATTERN, Tree.Kind.TOKEN, Tree.Kind.NAME);
 
-    caseBlock = parse("case value as x: ...", treeMaker::caseBlock);
-    asPattern = (AsPattern) caseBlock.pattern();
+    asPattern = pattern("case value as x: ...");
     assertThat(asPattern.pattern().getKind()).isEqualTo(Tree.Kind.CAPTURE_PATTERN);
   }