Syntax highlighting in Swagger-ui can't be configured in Springdoc. Fixes #877.

Author: bnasslahsen

springdoc-openapi-common/src/main/java/org/springdoc/ui/AbstractSwaggerIndexTransformer.java

@@ -40,6 +40,8 @@
  */
 public class AbstractSwaggerIndexTransformer {
 
+	private static final String PRESETS = "presets: [";
+
 	/**
 	 * The Swagger ui o auth properties.
 	 */
@@ -165,8 +167,8 @@ protected String addCSRF(String html) {
 		stringBuilder.append("'] = parts.pop().split(';').shift();\n");
 		stringBuilder.append("return request;\n");
 		stringBuilder.append("},\n");
-		stringBuilder.append("presets: [");
-		return html.replace("presets: [", stringBuilder.toString());
+		stringBuilder.append(PRESETS);
+		return html.replace(PRESETS, stringBuilder.toString());
 	}
 
 	protected String addSyntaxHighlight(String html) {
@@ -184,8 +186,8 @@ protected String addSyntaxHighlight(String html) {
 			stringBuilder.append("\"");
 		}
 		stringBuilder.append("},\n");
-		stringBuilder.append("presets: [");
-		return html.replace("presets: [", stringBuilder.toString());
+		stringBuilder.append(PRESETS);
+		return html.replace(PRESETS, stringBuilder.toString());
 	}
 
 }

springdoc-openapi-ui/src/test/java/test/org/springdoc/ui/app12/SpringDocApp12Test.java

@@ -32,10 +32,10 @@
 
 @TestPropertySource(properties = { "springdoc.swagger-ui.syntaxHighlight.activated=false",
 		"springdoc.swagger-ui.syntaxHighlight.theme=monokai" })
-public class SpringDocApp12Test extends AbstractSpringDocTest {
+class SpringDocApp12Test extends AbstractSpringDocTest {
 
 	@Test
-	public void transformed_index_with_oauth() throws Exception {
+	void transformed_index_with_oauth() throws Exception {
 		MvcResult mvcResult = mockMvc.perform(get("/swagger-ui/index.html")).andExpect(status().isOk()).andReturn();
 		String transformedIndex = mvcResult.getResponse().getContentAsString();
 		assertTrue(transformedIndex.contains("Swagger UI"));