Compatibility test Paths

Author: westse

core/src/test/java/org/openapitools/openapidiff/core/backcompat/PathsBCTest.java

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+package org.openapitools.openapidiff.core.backcompat;
+
+import static org.openapitools.openapidiff.core.TestUtils.assertOpenApiBackwardIncompatible;
+import static org.openapitools.openapidiff.core.TestUtils.assertSpecChangedButCompatible;
+import static org.openapitools.openapidiff.core.TestUtils.assertSpecUnchanged;
+
+import org.junit.jupiter.api.Test;
+
+public class PathsBCTest {
+  private final String BASE = "bc_paths_base.yaml";
+
+  @Test
+  public void unchanged() {
+    assertSpecUnchanged(BASE, BASE);
+  }
+
+  @Test
+  public void changedButCompatible() {
+    assertSpecChangedButCompatible(BASE, "bc_paths_changed_but_compatible.yaml");
+  }
+
+  @Test
+  public void decreased() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_paths_decreased.yaml");
+  }
+}

core/src/test/resources/bc_paths_base.yaml

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+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
+  /widgets/{id}:
+    get:
+      operationId: getWidget
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string

core/src/test/resources/bc_paths_changed_but_compatible.yaml

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+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
+  /widgets/{id}:
+    get:
+      operationId: getWidget
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
+  /widgets/{id}/status:
+    get:
+      operationId: getWidgetStatus
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string

core/src/test/resources/bc_paths_decreased.yaml

@@ -0,0 +1,16 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string