[ONOS-3878, 3876, 3879] Yang Parser Manager with Stack and Error Validation
Change-Id: I10e68bd676eca4d576de1234fbb67026c7b49939
diff --git a/src/test/java/org/onosproject/yangutils/parser/parseutils/ParseTreeErrorListenerTest.java b/src/test/java/org/onosproject/yangutils/parser/parseutils/ParseTreeErrorListenerTest.java
new file mode 100644
index 0000000..f91797e
--- /dev/null
+++ b/src/test/java/org/onosproject/yangutils/parser/parseutils/ParseTreeErrorListenerTest.java
@@ -0,0 +1,100 @@
+/*
+ * Copyright 2016 Open Networking Laboratory
+ *
+ * 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 org.onosproject.yangutils.parser.impl.parseutils;
+
+import org.antlr.v4.runtime.ANTLRFileStream;
+import org.antlr.v4.runtime.ANTLRInputStream;
+import org.antlr.v4.runtime.CommonTokenStream;
+import org.antlr.v4.runtime.tree.ParseTree;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.onosproject.yangutils.parser.antlrgencode.GeneratedYangLexer;
+import org.onosproject.yangutils.parser.antlrgencode.GeneratedYangParser;
+import org.onosproject.yangutils.parser.exceptions.ParserException;
+import org.onosproject.yangutils.parser.impl.YangUtilsParserManager;
+import org.onosproject.yangutils.parser.impl.parserutils.ParseTreeErrorListener;
+
+import java.io.BufferedWriter;
+import java.io.File;
+import java.io.FileWriter;
+import java.io.IOException;
+
+import static org.hamcrest.core.Is.is;
+import static org.junit.Assert.assertThat;
+
+/**
+ * Test case for testing parse tree error listener.
+ */
+public class ParseTreeErrorListenerTest {
+
+ YangUtilsParserManager manager = new YangUtilsParserManager();
+ File file;
+ BufferedWriter out;
+
+ @Before
+ public void setUp() throws Exception {
+ file = new File("demo.yang");
+ out = new BufferedWriter(new FileWriter(file));
+ }
+ @After
+ public void tearDown() throws Exception {
+ file.delete();
+ }
+
+ /**
+ * This test case checks whether the error received from parser is correctly
+ * handled.
+ */
+ @Test
+ public void syntaxErrorValidationTest() throws IOException {
+
+ out.write("module ONOS {\n");
+ out.write("yang-version 1\n");
+ out.write("namespace urn:ietf:params:xml:ns:yang:ietf-ospf;\n");
+ out.write("prefix On;\n");
+ out.write("}\n");
+ out.close();
+
+ ANTLRInputStream input = new ANTLRFileStream("demo.yang");
+
+ // Create a lexer that feeds off of input char stream.
+ GeneratedYangLexer lexer = new GeneratedYangLexer(input);
+ // Create a buffer of tokens pulled from the lexer.
+ CommonTokenStream tokens = new CommonTokenStream(lexer);
+ // Create a parser that feeds off the tokens buffer.
+ GeneratedYangParser parser = new GeneratedYangParser(tokens);
+ // Remove console error listener.
+ parser.removeErrorListeners();
+ // Create instance of customized error listener.
+ ParseTreeErrorListener parseTreeErrorListener = new ParseTreeErrorListener();
+ // Add customized error listener to catch errors during parsing.
+ parser.addErrorListener(parseTreeErrorListener);
+ // Begin parsing YANG file and generate parse tree.
+ ParseTree tree = parser.yangfile();
+ // Get the exception occurred during parsing.
+ ParserException parserException = parseTreeErrorListener.getParserException();
+
+ /**
+ * Check for the values set in syntax error function. If not set properly
+ * report an assert.
+ */
+ assertThat(parseTreeErrorListener.isExceptionFlag(), is(true));
+ assertThat(parserException.getLineNumber(), is(3));
+ assertThat(parserException.getCharPositionInLine(), is(0));
+ }
+}
\ No newline at end of file