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LexicalDifferenceCalculatorTest.java
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LexicalDifferenceCalculatorTest.java
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package com.github.javaparser.printer.lexicalpreservation;
import com.github.javaparser.GeneratedJavaParserConstants;
import com.github.javaparser.ast.Modifier;
import com.github.javaparser.ast.Node;
import com.github.javaparser.ast.PackageDeclaration;
import com.github.javaparser.ast.body.AnnotationDeclaration;
import com.github.javaparser.ast.body.EnumConstantDeclaration;
import com.github.javaparser.ast.body.EnumDeclaration;
import com.github.javaparser.ast.body.MethodDeclaration;
import com.github.javaparser.ast.comments.JavadocComment;
import com.github.javaparser.ast.expr.*;
import com.github.javaparser.ast.observer.ObservableProperty;
import com.github.javaparser.ast.stmt.BlockStmt;
import com.github.javaparser.ast.stmt.ExpressionStmt;
import com.github.javaparser.ast.stmt.Statement;
import com.github.javaparser.printer.ConcreteSyntaxModel;
import com.github.javaparser.printer.concretesyntaxmodel.CsmElement;
import com.github.javaparser.printer.concretesyntaxmodel.CsmToken;
import org.junit.Test;
import java.io.IOException;
import java.util.EnumSet;
import java.util.List;
import static com.github.javaparser.TokenTypes.eolTokenKind;
import static com.github.javaparser.TokenTypes.spaceTokenKind;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
public class LexicalDifferenceCalculatorTest extends AbstractLexicalPreservingTest {
@Test
public void compilationUnitExampleOriginal() {
considerCode("class A {}");
CsmElement element = ConcreteSyntaxModel.forClass(cu.getClass());
LexicalDifferenceCalculator.CalculatedSyntaxModel csmOriginal = new LexicalDifferenceCalculator().calculatedSyntaxModelForNode(element, cu);
assertEquals(2, csmOriginal.elements.size());
assertEquals(new LexicalDifferenceCalculator.CsmChild(cu.getType(0)), csmOriginal.elements.get(0));
assertEquals(new CsmToken(eolTokenKind()), csmOriginal.elements.get(1));
}
@Test
public void compilationUnitExampleWithPackageSet() {
considerCode("class A {}");
CsmElement element = ConcreteSyntaxModel.forClass(cu.getClass());
PackageDeclaration packageDeclaration = new PackageDeclaration(new Name(new Name("foo"), "bar"));
LexicalDifferenceCalculator.CalculatedSyntaxModel csmChanged = new LexicalDifferenceCalculator().calculatedSyntaxModelAfterPropertyChange(element, cu, ObservableProperty.PACKAGE_DECLARATION, null, packageDeclaration);
assertEquals(3, csmChanged.elements.size());
assertEquals(new LexicalDifferenceCalculator.CsmChild(packageDeclaration), csmChanged.elements.get(0));
assertEquals(new LexicalDifferenceCalculator.CsmChild(cu.getType(0)), csmChanged.elements.get(1));
assertEquals(new CsmToken(eolTokenKind()), csmChanged.elements.get(2));
}
@Test
public void annotationDeclarationModifiersExampleOriginal() throws IOException {
considerExample("AnnotationDeclaration_Example1_original");
AnnotationDeclaration annotationDeclaration = (AnnotationDeclaration)cu.getType(0);
CsmElement element = ConcreteSyntaxModel.forClass(annotationDeclaration.getClass());
LexicalDifferenceCalculator.CalculatedSyntaxModel csm = new LexicalDifferenceCalculator().calculatedSyntaxModelForNode(element, annotationDeclaration);
csm.removeIndentationElements();
int i = 0;
assertEquals(new CsmToken(GeneratedJavaParserConstants.AT), csm.elements.get(i++));
assertEquals(new CsmToken(GeneratedJavaParserConstants.INTERFACE), csm.elements.get(i++));
assertEquals(new CsmToken(spaceTokenKind()), csm.elements.get(i++));
assertEquals(new LexicalDifferenceCalculator.CsmChild(annotationDeclaration.getName()), csm.elements.get(i++));
assertEquals(new CsmToken(spaceTokenKind()), csm.elements.get(i++));
assertEquals(new CsmToken(GeneratedJavaParserConstants.LBRACE), csm.elements.get(i++));
assertEquals(new CsmToken(eolTokenKind()), csm.elements.get(i++));
assertEquals(new LexicalDifferenceCalculator.CsmChild(annotationDeclaration.getMember(0)), csm.elements.get(i++));
assertEquals(new CsmToken(eolTokenKind()), csm.elements.get(i++));
assertEquals(new LexicalDifferenceCalculator.CsmChild(annotationDeclaration.getMember(1)), csm.elements.get(i++));
assertEquals(new CsmToken(eolTokenKind()), csm.elements.get(i++));
assertEquals(new LexicalDifferenceCalculator.CsmChild(annotationDeclaration.getMember(2)), csm.elements.get(i++));
assertEquals(new CsmToken(eolTokenKind()), csm.elements.get(i++));
assertEquals(new LexicalDifferenceCalculator.CsmChild(annotationDeclaration.getMember(3)), csm.elements.get(i++));
assertEquals(new CsmToken(eolTokenKind()), csm.elements.get(i++));
assertEquals(new LexicalDifferenceCalculator.CsmChild(annotationDeclaration.getMember(4)), csm.elements.get(i++));
assertEquals(new CsmToken(eolTokenKind()), csm.elements.get(i++));
assertEquals(new LexicalDifferenceCalculator.CsmChild(annotationDeclaration.getMember(5)), csm.elements.get(i++));
assertEquals(new CsmToken(eolTokenKind()), csm.elements.get(i++));
assertEquals(new CsmToken(GeneratedJavaParserConstants.RBRACE), csm.elements.get(i++));
assertEquals(i, csm.elements.size());
}
@Test
public void annotationDeclarationModifiersExampleModified() throws IOException {
considerExample("AnnotationDeclaration_Example1_original");
AnnotationDeclaration annotationDeclaration = (AnnotationDeclaration)cu.getType(0);
CsmElement element = ConcreteSyntaxModel.forClass(annotationDeclaration.getClass());
LexicalDifferenceCalculator.CalculatedSyntaxModel csm = new LexicalDifferenceCalculator().calculatedSyntaxModelAfterPropertyChange(element, annotationDeclaration, ObservableProperty.MODIFIERS, EnumSet.noneOf(Modifier.class), EnumSet.of(Modifier.PUBLIC));
csm.removeIndentationElements();
int i = 0;
assertEquals(new CsmToken(GeneratedJavaParserConstants.PUBLIC), csm.elements.get(i++));
assertEquals(new CsmToken(spaceTokenKind()), csm.elements.get(i++));
assertEquals(new CsmToken(GeneratedJavaParserConstants.AT), csm.elements.get(i++));
assertEquals(new CsmToken(GeneratedJavaParserConstants.INTERFACE), csm.elements.get(i++));
assertEquals(new CsmToken(spaceTokenKind()), csm.elements.get(i++));
assertEquals(new LexicalDifferenceCalculator.CsmChild(annotationDeclaration.getName()), csm.elements.get(i++));
assertEquals(new CsmToken(spaceTokenKind()), csm.elements.get(i++));
assertEquals(new CsmToken(GeneratedJavaParserConstants.LBRACE), csm.elements.get(i++));
assertEquals(new CsmToken(eolTokenKind()), csm.elements.get(i++));
assertEquals(new LexicalDifferenceCalculator.CsmChild(annotationDeclaration.getMember(0)), csm.elements.get(i++));
assertEquals(new CsmToken(eolTokenKind()), csm.elements.get(i++));
assertEquals(new LexicalDifferenceCalculator.CsmChild(annotationDeclaration.getMember(1)), csm.elements.get(i++));
assertEquals(new CsmToken(eolTokenKind()), csm.elements.get(i++));
assertEquals(new LexicalDifferenceCalculator.CsmChild(annotationDeclaration.getMember(2)), csm.elements.get(i++));
assertEquals(new CsmToken(eolTokenKind()), csm.elements.get(i++));
assertEquals(new LexicalDifferenceCalculator.CsmChild(annotationDeclaration.getMember(3)), csm.elements.get(i++));
assertEquals(new CsmToken(eolTokenKind()), csm.elements.get(i++));
assertEquals(new LexicalDifferenceCalculator.CsmChild(annotationDeclaration.getMember(4)), csm.elements.get(i++));
assertEquals(new CsmToken(eolTokenKind()), csm.elements.get(i++));
assertEquals(new LexicalDifferenceCalculator.CsmChild(annotationDeclaration.getMember(5)), csm.elements.get(i++));
assertEquals(new CsmToken(eolTokenKind()), csm.elements.get(i++));
assertEquals(new CsmToken(GeneratedJavaParserConstants.RBRACE), csm.elements.get(i++));
assertEquals(i, csm.elements.size());
}
@Test
public void annotationDeclarationNameExampleModified() throws IOException {
considerExample("AnnotationDeclaration_Example1_original");
AnnotationDeclaration annotationDeclaration = (AnnotationDeclaration)cu.getType(0);
CsmElement element = ConcreteSyntaxModel.forClass(annotationDeclaration.getClass());
SimpleName newName = new SimpleName("NewName");
LexicalDifferenceCalculator.CalculatedSyntaxModel csm = new LexicalDifferenceCalculator().calculatedSyntaxModelAfterPropertyChange(element, annotationDeclaration, ObservableProperty.NAME,
annotationDeclaration.getName(), newName);
csm.removeIndentationElements();
int i = 0;
assertEquals(new CsmToken(GeneratedJavaParserConstants.AT), csm.elements.get(i++));
assertEquals(new CsmToken(GeneratedJavaParserConstants.INTERFACE), csm.elements.get(i++));
assertEquals(new CsmToken(spaceTokenKind()), csm.elements.get(i++));
assertEquals(new LexicalDifferenceCalculator.CsmChild(newName), csm.elements.get(i++));
assertEquals(new CsmToken(spaceTokenKind()), csm.elements.get(i++));
assertEquals(new CsmToken(GeneratedJavaParserConstants.LBRACE), csm.elements.get(i++));
assertEquals(new CsmToken(eolTokenKind()), csm.elements.get(i++));
assertEquals(new LexicalDifferenceCalculator.CsmChild(annotationDeclaration.getMember(0)), csm.elements.get(i++));
assertEquals(new CsmToken(eolTokenKind()), csm.elements.get(i++));
assertEquals(new LexicalDifferenceCalculator.CsmChild(annotationDeclaration.getMember(1)), csm.elements.get(i++));
assertEquals(new CsmToken(eolTokenKind()), csm.elements.get(i++));
assertEquals(new LexicalDifferenceCalculator.CsmChild(annotationDeclaration.getMember(2)), csm.elements.get(i++));
assertEquals(new CsmToken(eolTokenKind()), csm.elements.get(i++));
assertEquals(new LexicalDifferenceCalculator.CsmChild(annotationDeclaration.getMember(3)), csm.elements.get(i++));
assertEquals(new CsmToken(eolTokenKind()), csm.elements.get(i++));
assertEquals(new LexicalDifferenceCalculator.CsmChild(annotationDeclaration.getMember(4)), csm.elements.get(i++));
assertEquals(new CsmToken(eolTokenKind()), csm.elements.get(i++));
assertEquals(new LexicalDifferenceCalculator.CsmChild(annotationDeclaration.getMember(5)), csm.elements.get(i++));
assertEquals(new CsmToken(eolTokenKind()), csm.elements.get(i++));
assertEquals(new CsmToken(GeneratedJavaParserConstants.RBRACE), csm.elements.get(i++));
assertEquals(i, csm.elements.size());
}
@Test
public void annotationDeclaratioJavadocExampleOriginal() throws IOException {
considerExample("AnnotationDeclaration_Example3_original");
AnnotationDeclaration annotationDeclaration = (AnnotationDeclaration)cu.getType(0);
CsmElement element = ConcreteSyntaxModel.forClass(annotationDeclaration.getClass());
LexicalDifferenceCalculator.CalculatedSyntaxModel csm = new LexicalDifferenceCalculator().calculatedSyntaxModelForNode(element, annotationDeclaration);
csm.removeIndentationElements();
int i = 0;
assertEquals(new CsmToken(GeneratedJavaParserConstants.PUBLIC), csm.elements.get(i++));
assertEquals(new CsmToken(spaceTokenKind()), csm.elements.get(i++));
assertEquals(new CsmToken(GeneratedJavaParserConstants.AT), csm.elements.get(i++));
assertEquals(new CsmToken(GeneratedJavaParserConstants.INTERFACE), csm.elements.get(i++));
assertEquals(new CsmToken(spaceTokenKind()), csm.elements.get(i++));
assertEquals(new LexicalDifferenceCalculator.CsmChild(annotationDeclaration.getName()), csm.elements.get(i++));
assertEquals(new CsmToken(spaceTokenKind()), csm.elements.get(i++));
assertEquals(new CsmToken(GeneratedJavaParserConstants.LBRACE), csm.elements.get(i++));
assertEquals(new CsmToken(eolTokenKind()), csm.elements.get(i++));
assertEquals(new LexicalDifferenceCalculator.CsmChild(annotationDeclaration.getMember(0)), csm.elements.get(i++));
assertEquals(new CsmToken(eolTokenKind()), csm.elements.get(i++));
assertEquals(new LexicalDifferenceCalculator.CsmChild(annotationDeclaration.getMember(1)), csm.elements.get(i++));
assertEquals(new CsmToken(eolTokenKind()), csm.elements.get(i++));
assertEquals(new LexicalDifferenceCalculator.CsmChild(annotationDeclaration.getMember(2)), csm.elements.get(i++));
assertEquals(new CsmToken(eolTokenKind()), csm.elements.get(i++));
assertEquals(new LexicalDifferenceCalculator.CsmChild(annotationDeclaration.getMember(3)), csm.elements.get(i++));
assertEquals(new CsmToken(eolTokenKind()), csm.elements.get(i++));
assertEquals(new LexicalDifferenceCalculator.CsmChild(annotationDeclaration.getMember(4)), csm.elements.get(i++));
assertEquals(new CsmToken(eolTokenKind()), csm.elements.get(i++));
assertEquals(new LexicalDifferenceCalculator.CsmChild(annotationDeclaration.getMember(5)), csm.elements.get(i++));
assertEquals(new CsmToken(eolTokenKind()), csm.elements.get(i++));
assertEquals(new CsmToken(GeneratedJavaParserConstants.RBRACE), csm.elements.get(i++));
assertEquals(i, csm.elements.size());
}
@Test
public void annotationDeclaratioJavadocExampleAddingJavadoc() throws IOException {
considerExample("AnnotationDeclaration_Example3_original");
AnnotationDeclaration annotationDeclaration = (AnnotationDeclaration)cu.getType(0);
CsmElement element = ConcreteSyntaxModel.forClass(annotationDeclaration.getClass());
JavadocComment comment = new JavadocComment("Cool this annotation!");
LexicalDifferenceCalculator.CalculatedSyntaxModel csm = new LexicalDifferenceCalculator().calculatedSyntaxModelAfterPropertyChange(element, annotationDeclaration, ObservableProperty.COMMENT, null, comment);
csm.removeIndentationElements();
int i = 0;
assertEquals(new CsmToken(GeneratedJavaParserConstants.PUBLIC), csm.elements.get(i++));
assertEquals(new CsmToken(spaceTokenKind()), csm.elements.get(i++));
assertEquals(new CsmToken(GeneratedJavaParserConstants.AT), csm.elements.get(i++));
assertEquals(new CsmToken(GeneratedJavaParserConstants.INTERFACE), csm.elements.get(i++));
assertEquals(new CsmToken(spaceTokenKind()), csm.elements.get(i++));
assertEquals(new LexicalDifferenceCalculator.CsmChild(annotationDeclaration.getName()), csm.elements.get(i++));
assertEquals(new CsmToken(spaceTokenKind()), csm.elements.get(i++));
assertEquals(new CsmToken(GeneratedJavaParserConstants.LBRACE), csm.elements.get(i++));
assertEquals(new CsmToken(eolTokenKind()), csm.elements.get(i++));
assertEquals(new LexicalDifferenceCalculator.CsmChild(annotationDeclaration.getMember(0)), csm.elements.get(i++));
assertEquals(new CsmToken(eolTokenKind()), csm.elements.get(i++));
assertEquals(new LexicalDifferenceCalculator.CsmChild(annotationDeclaration.getMember(1)), csm.elements.get(i++));
assertEquals(new CsmToken(eolTokenKind()), csm.elements.get(i++));
assertEquals(new LexicalDifferenceCalculator.CsmChild(annotationDeclaration.getMember(2)), csm.elements.get(i++));
assertEquals(new CsmToken(eolTokenKind()), csm.elements.get(i++));
assertEquals(new LexicalDifferenceCalculator.CsmChild(annotationDeclaration.getMember(3)), csm.elements.get(i++));
assertEquals(new CsmToken(eolTokenKind()), csm.elements.get(i++));
assertEquals(new LexicalDifferenceCalculator.CsmChild(annotationDeclaration.getMember(4)), csm.elements.get(i++));
assertEquals(new CsmToken(eolTokenKind()), csm.elements.get(i++));
assertEquals(new LexicalDifferenceCalculator.CsmChild(annotationDeclaration.getMember(5)), csm.elements.get(i++));
assertEquals(new CsmToken(eolTokenKind()), csm.elements.get(i++));
assertEquals(new CsmToken(GeneratedJavaParserConstants.RBRACE), csm.elements.get(i++));
assertEquals(i, csm.elements.size());
}
@Test
public void simpleEnumConstantDeclaration() throws IOException {
EnumConstantDeclaration ecd = considerEcd("A");
LexicalDifferenceCalculator.CalculatedSyntaxModel csm = new LexicalDifferenceCalculator().calculatedSyntaxModelForNode(ecd);
int i = 0;
assertEquals(new LexicalDifferenceCalculator.CsmChild(ecd.getName()), csm.elements.get(i++));
assertEquals(i, csm.elements.size());
}
@Test
public void csmModelAfterAddingStatementToEmptyBlock() throws IOException {
LexicalDifferenceCalculator ldc = new LexicalDifferenceCalculator();
considerExample("ASimpleClassWithMoreFormatting_step3");
MethodDeclaration setter = cu.getClassByName("MyRenamedClass").get()
.getMethodsByName("setAField").get(0);
Statement assignStatement = new ExpressionStmt(
new AssignExpr(
new FieldAccessExpr(new ThisExpr(),"aField"),
new NameExpr("aField"),
AssignExpr.Operator.ASSIGN
));
LexicalDifferenceCalculator.CalculatedSyntaxModel calculatedSyntaxModel =
ldc.calculatedSyntaxModelAfterListAddition(
ConcreteSyntaxModel.forClass(BlockStmt.class),
ObservableProperty.STATEMENTS,
setter.getBody().get().getStatements(),
0,
assignStatement);
int index = 0;
assertEquals(CsmElement.token(GeneratedJavaParserConstants.LBRACE), calculatedSyntaxModel.elements.get(index++));
assertEquals(CsmElement.newline(), calculatedSyntaxModel.elements.get(index++));
assertEquals(CsmElement.indent(), calculatedSyntaxModel.elements.get(index++));
assertTrue(isChild(calculatedSyntaxModel.elements.get(index++), ExpressionStmt.class));
assertEquals(CsmElement.newline(), calculatedSyntaxModel.elements.get(index++));
assertEquals(CsmElement.unindent(), calculatedSyntaxModel.elements.get(index++));
assertEquals(CsmElement.token(GeneratedJavaParserConstants.RBRACE), calculatedSyntaxModel.elements.get(index++));
assertEquals(index, calculatedSyntaxModel.elements.size());
}
@Test
public void differenceAfterddingStatementToEmptyBlock() throws IOException {
LexicalDifferenceCalculator ldc = new LexicalDifferenceCalculator();
considerExample("ASimpleClassWithMoreFormatting_step3");
MethodDeclaration setter = cu.getClassByName("MyRenamedClass").get()
.getMethodsByName("setAField").get(0);
Statement assignStatement = new ExpressionStmt(
new AssignExpr(
new FieldAccessExpr(new ThisExpr(),"aField"),
new NameExpr("aField"),
AssignExpr.Operator.ASSIGN
));
List<DifferenceElementCalculator.DifferenceElement> differenceElements = ldc.calculateListAdditionDifference(
ObservableProperty.STATEMENTS,
setter.getBody().get().getStatements(),
0,
assignStatement);
int index = 0;
assertEquals(DifferenceElementCalculator.DifferenceElement.kept(CsmElement.token(GeneratedJavaParserConstants.LBRACE)), differenceElements.get(index++));
assertEquals(DifferenceElementCalculator.DifferenceElement.kept(CsmElement.newline()), differenceElements.get(index++));
assertEquals(DifferenceElementCalculator.DifferenceElement.added(CsmElement.indent()), differenceElements.get(index++));
assertTrue(isAddedChild(differenceElements.get(index++), ExpressionStmt.class));
assertEquals(DifferenceElementCalculator.DifferenceElement.added(CsmElement.newline()), differenceElements.get(index++));
assertEquals(DifferenceElementCalculator.DifferenceElement.added(CsmElement.unindent()), differenceElements.get(index++));
assertEquals(DifferenceElementCalculator.DifferenceElement.kept(CsmElement.token(GeneratedJavaParserConstants.RBRACE)), differenceElements.get(index++));
assertEquals(index, differenceElements.size());
}
private boolean isAddedChild(DifferenceElementCalculator.DifferenceElement element, Class<? extends Node> childClass) {
return element.isAdded() && isChild(element.getElement(), childClass);
}
private boolean isChild(CsmElement element, Class<? extends Node> childClass) {
return element instanceof LexicalDifferenceCalculator.CsmChild && childClass.isInstance(((LexicalDifferenceCalculator.CsmChild)element).getChild());
}
protected EnumConstantDeclaration considerEcd(String code) {
considerCode("enum A { " + code + " }");
return ((EnumDeclaration)cu.getType(0)).getEntries().get(0);
}
}