example: add missing files for example

doc/openapi/components/schemas/config/nodes/_example.yaml

@@ -0,0 +1,3 @@
+allOf:
+- $ref: ../node_obj.yaml
+- $ref: example.yaml

doc/openapi/components/schemas/config/nodes/example.yaml

@@ -0,0 +1,21 @@
+# yaml-language-server: $schema=http://json-schema.org/draft-07/schema
+---
+
+allOf:
+- type: object
+  properties:
+    setting1:
+      type: integer
+      min: 0    # Make sure any constraints of the values are checked by ExampleNode::check().
+      max: 100
+      default: 72 # Make sure the default values match ExampleNode::ExampleNode().
+      description: A first setting
+
+    setting2:
+      type: string
+      min: 0
+      max: 10
+      default: something
+      description: Another setting
+
+- $ref: ../node.yaml

lib/nodes/example.cpp

@@ -37,8 +37,9 @@ using namespace villas::utils;
 
 ExampleNode::ExampleNode(const std::string &name) :
 	Node(name),
-	setting1(0),
-	setting2(nullptr)
+	setting1(72),
+	setting2("something"),
+	state1(0)
 { }
 
 ExampleNode::~ExampleNode()

tests/integration/node-example.sh

@@ -0,0 +1,71 @@
+#!/bin/bash
+#
+# Test for the example node-type
+#
+# @author Steffen Vogel <svogel2@eonerc.rwth-aachen.de>
+# @copyright 2014-2022, Institute for Automation of Complex Power Systems, EONERC
+# @license GNU General Public License (version 3)
+#
+# VILLASnode
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+##################################################################################
+
+set -e
+
+echo "The example node does nothing useful which we could test"
+exit 99
+
+DIR=$(mktemp -d)
+pushd ${DIR}
+
+function finish {
+	popd
+	rm -rf ${DIR}
+}
+trap finish EXIT
+
+cat > expect.dat <<EOF
+1553690684.041211800-4.313770e-02(5)	6.303265	0.492616	0.309017	-1.000000	0.800000	0.050000
+1553690684.051211800-5.287260e-02(6)	5.673902	0.148827	0.368125	-1.000000	0.760000	0.060000
+1553690684.061211800-6.266780e-02(7)	5.896198	0.232320	0.425779	-1.000000	0.720000	0.070000
+1553690684.071211800-7.256350e-02(8)	5.788125	0.152309	0.481754	-1.000000	0.680000	0.080000
+1553690684.081211800-8.251890e-02(9)	6.748635	0.608491	0.535827	-1.000000	0.640000	0.090000
+EOF
+
+cat > config.json <<EOF
+{
+	"nodes": {
+		"example_node1": {
+			"type": "example",
+
+			"setting1": 66
+		},
+		"file": {
+			"type": "file",
+			"uri": "output.dat"
+		}
+	},
+	"paths": [
+		{
+			"in": "example_node1",
+			"out": "file",
+		}
+	]
+}
+EOF
+
+villas node config.json
+
+villas compare output.dat expect.dat