Merge pull request #1376 from mih-kopylov/bug/1375-empty-blank-parameter-example

Fix for issue #1375

Author: gracekarina

modules/swagger-parser-v3/src/main/java/io/swagger/v3/parser/util/OpenAPIDeserializer.java

@@ -1727,10 +1727,7 @@ public Object getAnyExample(String nodeKey,ObjectNode node, String location, Par
         JsonNode example = node.get(nodeKey);
         if (example != null) {
             if (example.getNodeType().equals(JsonNodeType.STRING)) {
-                String value = getString(nodeKey, node, false, location, result);
-                if (StringUtils.isNotBlank(value)) {
-                    return value;
-                }
+                return getString(nodeKey, node, false, location, result);
             } if (example.getNodeType().equals(JsonNodeType.NUMBER)) {
                 Integer integerExample = getInteger(nodeKey, node, false, location, result);
                 if (integerExample != null) {

modules/swagger-parser-v3/src/test/java/io/swagger/v3/parser/test/OpenAPIV3ParserTest.java

@@ -2326,6 +2326,26 @@ public void testIssue1335() {
         assertNotNull(result.getOpenAPI().getComponents().getExamples().get("ex1"));
     }
 
+    @Test
+    public void testEmptyQueryParameterExample() {
+        final ParseOptions options = new ParseOptions();
+        options.setResolve(true);
+
+        SwaggerParseResult result = new OpenAPIV3Parser()
+                .readLocation("src/test/resources/emptyQueryParameter.yaml", null, options);
+        assertEquals("", result.getOpenAPI().getPaths().get("/foo").getGet().getParameters().get(0).getExample());
+    }
+
+    @Test
+    public void testBlankQueryParameterExample() {
+        final ParseOptions options = new ParseOptions();
+        options.setResolve(true);
+
+        SwaggerParseResult result = new OpenAPIV3Parser()
+                .readLocation("src/test/resources/blankQueryParameter.yaml", null, options);
+        assertEquals(" ", result.getOpenAPI().getPaths().get("/foo").getGet().getParameters().get(0).getExample());
+    }
+
     @Test
     public void testRegressionIssue1236() {
         final ParseOptions options = new ParseOptions();

modules/swagger-parser-v3/src/test/java/io/swagger/v3/parser/util/OpenAPIDeserializerTest.java

@@ -2384,7 +2384,7 @@ public void readContentObject(JsonNode rootNode) throws Exception {
         Assert.assertEquals(petByStatusEndpoint.getGet().getParameters().get(0).getContent().get("text/plain").getExamples().get("list").getSummary(),"List of names");
         Assert.assertEquals(petByStatusEndpoint.getGet().getParameters().get(0).getContent().get("text/plain").getExamples().get("list").getValue(),"Bob,Diane,Mary,Bill");
         Assert.assertEquals(petByStatusEndpoint.getGet().getParameters().get(0).getContent().get("text/plain").getExamples().get("empty").getSummary(),"Empty");
-        Assert.assertNull(petByStatusEndpoint.getGet().getParameters().get(0).getContent().get("text/plain").getExamples().get("empty").getValue());
+        Assert.assertEquals(petByStatusEndpoint.getGet().getParameters().get(0).getContent().get("text/plain").getExamples().get("empty").getValue(),"");
 
         PathItem petEndpoint = paths.get("/pet");
         Assert.assertNotNull(petEndpoint.getPut());

modules/swagger-parser-v3/src/test/resources/blankQueryParameter.yaml

@@ -0,0 +1,14 @@
+openapi: 3.0.2
+info:
+  title: Example references
+  version: 1.0.0
+paths:
+  /foo:
+    get:
+      parameters:
+        - name: paramName
+          in: query
+          example: " "
+      responses:
+        '200':
+          description: success

modules/swagger-parser-v3/src/test/resources/emptyQueryParameter.yaml

@@ -0,0 +1,14 @@
+openapi: 3.0.2
+info:
+  title: Example references
+  version: 1.0.0
+paths:
+  /foo:
+    get:
+      parameters:
+        - name: paramName
+          in: query
+          example: ""
+      responses:
+        '200':
+          description: success