Restore test of model reader and filter

microprofile/openapi/src/test/java/io/helidon/microprofile/openapi/TestFilterAndModelReader.java

@@ -0,0 +1,89 @@
+/*
+ * Copyright (c) 2023 Oracle and/or its affiliates.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package io.helidon.microprofile.openapi;
+
+import io.helidon.microprofile.openapi.test.MyModelReader;
+import io.helidon.microprofile.tests.junit5.AddConfig;
+import io.helidon.microprofile.tests.junit5.HelidonTest;
+
+import jakarta.inject.Inject;
+import jakarta.json.JsonException;
+import jakarta.json.JsonObject;
+import jakarta.json.JsonString;
+import jakarta.json.JsonValue;
+import jakarta.ws.rs.client.WebTarget;
+import jakarta.ws.rs.core.MediaType;
+import org.junit.jupiter.api.Test;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.containsString;
+import static org.hamcrest.Matchers.is;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+@HelidonTest
+@AddConfig(key = "mp.openapi.model.reader", value = "io.helidon.microprofile.openapi.test.MyModelReader")
+@AddConfig(key = "mp.openapi.filter", value = "io.helidon.microprofile.openapi.test.MySimpleFilter")
+class TestFilterAndModelReader {
+
+    @Inject
+    private WebTarget webTarget;
+
+    /**
+     * Converts a JSON pointer possibly containing slashes and tildes into a
+     * JSON pointer with such characters properly escaped.
+     *
+     * @param pointer original JSON pointer expression
+     * @return escaped (if needed) JSON pointer
+     */
+    static String escapeForJsonPointer(String pointer) {
+        return pointer.replaceAll("\\~", "~0").replaceAll("\\/", "~1");
+    }
+
+    @Test
+    void checkCustomModelReader() {
+        JsonObject openApiResult = webTarget.path("/openapi")
+                .request(MediaType.APPLICATION_JSON)
+                .get(JsonObject.class);
+
+        // The model reader adds a path to the model. Check for it.
+        JsonValue v = openApiResult.getValue(String.format("/paths/%s/get/summary",
+                                                           escapeForJsonPointer(MyModelReader.MODEL_READER_PATH)));
+        assertThat("Json value type of path added by reader", v.getValueType(), is(JsonValue.ValueType.STRING));
+        JsonString s = (JsonString) v;
+        assertThat("Summary value added by reader", s.getString(), is(MyModelReader.SUMMARY));
+    }
+
+    @Test
+    void makeSureFilteredPathIsMissing() {
+        JsonObject openApiResult = webTarget.path("/openapi")
+                .request(MediaType.APPLICATION_JSON)
+                .get(JsonObject.class);
+
+        /*
+         Although the model reader adds the "doomed" path, the filter should remove it.
+         */
+        JsonException ex = assertThrows(JsonException.class,
+                                        () -> {
+                                            JsonValue v = openApiResult.getValue(
+                                                    String.format("/paths/%s/get/summary",
+                                                                  escapeForJsonPointer(MyModelReader.DOOMED_PATH)));
+                                        });
+        assertThat("Exception message",
+                   ex.getMessage(),
+                   containsString(String.format("contains no mapping for the name '%s'",
+                                                MyModelReader.DOOMED_PATH)));
+    }
+}