Additional test case and error message refinement

PiperOrigin-RevId: 682818292

Author: TristonianJones

policy/src/main/java/dev/cel/policy/CelPolicyYamlConfigParser.java

@@ -343,7 +343,7 @@ private CelPolicyConfig parseYaml(String source, String description)
  .orElseThrow(
  () ->
  new CelPolicyValidationException(
- String.format("YAML document is malformed: %s", source)));
+ String.format("YAML document empty or malformed: %s", source)));
  node = yamlNode;
  } catch (RuntimeException e) {
  throw new CelPolicyValidationException("YAML document is malformed: " + e.getMessage(), e);

policy/src/main/java/dev/cel/policy/CelPolicyYamlParser.java

@@ -73,7 +73,8 @@ private CelPolicy parseYaml() throws CelPolicyValidationException {
  .orElseThrow(
  () ->
  new CelPolicyValidationException(
- String.format("YAML document is malformed: %s", policySourceString)));
+ String.format(
+ "YAML document empty or malformed: %s", policySourceString)));
  node = yamlNode;
  } catch (RuntimeException e) {
  throw new CelPolicyValidationException("YAML document is malformed: " + e.getMessage(), e);

policy/src/test/java/dev/cel/policy/CelPolicyYamlConfigParserTest.java

@@ -43,6 +43,11 @@ public final class CelPolicyYamlConfigParserTest {
  private static final CelPolicyConfigParser POLICY_CONFIG_PARSER =
  CelPolicyParserFactory.newYamlConfigParser();
 
+ @Test
+ public void config_setEmpty() throws Exception {
+ assertThrows(CelPolicyValidationException.class, () -> POLICY_CONFIG_PARSER.parse(""));
+ }
+
  @Test
  public void config_setBasicProperties() throws Exception {
  String yamlConfig = "name: hello\n" + "description: empty\n" + "container: pb.pkg\n";

policy/src/test/java/dev/cel/policy/CelPolicyYamlParserTest.java

@@ -43,6 +43,11 @@ public void parseYamlPolicy_success(@TestParameter TestYamlPolicy yamlPolicy) th
  assertThat(policy.policySource().getDescription()).isEqualTo(description);
  }
 
+ @Test
+ public void parser_setEmpty() throws Exception {
+ assertThrows(CelPolicyValidationException.class, () -> POLICY_PARSER.parse("", ""));
+ }
+
  @Test
  public void parseYamlPolicy_withExplanation() throws Exception {
  String policySource =