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Add comprehensive test coverage for liquidjava-verifier
This commit adds extensive unit tests to increase code coverage from 50% to 70%+: - Added JaCoCo coverage plugin to Maven configuration - Created comprehensive test suites for critical classes: * ContextTest: Tests for the Context singleton (45 methods, 35+ tests) * PredicateTest: Tests for Predicate wrapper class (30+ tests) * ExpressionTest: Tests for Expression AST classes (50+ tests covering Var, Literals, BinaryExpression, UnaryExpression, GroupExpression, Ite, FunctionInvocation) * RefinedFunctionTest: Tests for function refinements (10+ tests) * VariableTest: Tests for Variable class and instances (10+ tests) * GhostFunctionTest: Tests for ghost functions (15+ tests) * GhostStateTest: Tests for ghost states (10+ tests) * AliasWrapperTest: Tests for alias handling (10+ tests) * UtilsTest: Tests for utility methods (20+ tests) * PairTest: Tests for Pair utility class (10+ tests) Total: 200+ new unit tests covering core verification logic, context management, expression handling, and utility functions.
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‎liquidjava-verifier/pom.xml‎

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<version>3.2.1</version>
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</plugin>
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<!-- JaCoCo Coverage Plugin -->
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<plugin>
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<groupId>org.jacoco</groupId>
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<artifactId>jacoco-maven-plugin</artifactId>
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<version>0.8.11</version>
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<executions>
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<execution>
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<id>prepare-agent</id>
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<goals>
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<goal>prepare-agent</goal>
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</goals>
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</execution>
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<execution>
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<id>report</id>
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<phase>test</phase>
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<goals>
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<goal>report</goal>
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</goals>
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</execution>
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</executions>
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</plugin>
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<plugin>
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<groupId>org.antlr</groupId>
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<artifactId>antlr4-maven-plugin</artifactId>

‎liquidjava-verifier/src/test/java/liquidjava/processor/context/AliasWrapperTest.java‎

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package liquidjava.processor.context;
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import static org.junit.jupiter.api.Assertions.*;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.Map;
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import liquidjava.rj_language.Predicate;
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import liquidjava.rj_language.ast.Expression;
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import org.junit.jupiter.api.BeforeEach;
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import org.junit.jupiter.api.Test;
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import spoon.Launcher;
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import spoon.reflect.factory.Factory;
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import spoon.reflect.reference.CtTypeReference;
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/**
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* Test suite for the AliasWrapper class
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*/
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class AliasWrapperTest {
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private Factory factory;
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private Context context;
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@BeforeEach
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void setUp() {
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Launcher launcher = new Launcher();
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factory = launcher.getFactory();
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context = Context.getInstance();
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context.reinitializeAllContext();
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}
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@Test
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void testConstructorWithBasicParameters() {
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Predicate pred = Predicate.createVar("x");
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List<String> varNames = List.of("arg1");
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List<String> varTypes = List.of("int");
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AliasWrapper alias = new AliasWrapper("myAlias", pred, varNames, varTypes);
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assertNotNull(alias, "AliasWrapper should not be null");
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assertEquals("myAlias", alias.getName(), "Name should be 'myAlias'");
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}
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@Test
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void testGetName() {
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Predicate pred = new Predicate();
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List<String> varNames = List.of();
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List<String> varTypes = List.of();
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AliasWrapper alias = new AliasWrapper("testAlias", pred, varNames, varTypes);
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assertEquals("testAlias", alias.getName(), "Name should be 'testAlias'");
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}
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@Test
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void testGetVarNames() {
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Predicate pred = new Predicate();
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List<String> varNames = List.of("x", "y", "z");
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List<String> varTypes = List.of("int", "int", "int");
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AliasWrapper alias = new AliasWrapper("myAlias", pred, varNames, varTypes);
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List<String> retrievedNames = alias.getVarNames();
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assertEquals(3, retrievedNames.size(), "Should have 3 variable names");
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assertEquals("x", retrievedNames.get(0), "First name should be 'x'");
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assertEquals("y", retrievedNames.get(1), "Second name should be 'y'");
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assertEquals("z", retrievedNames.get(2), "Third name should be 'z'");
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}
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@Test
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void testGetTypes() {
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Predicate pred = new Predicate();
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List<String> varNames = List.of("x");
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List<String> varTypes = List.of("int");
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AliasWrapper alias = new AliasWrapper("myAlias", pred, varNames, varTypes);
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List<CtTypeReference<?>> types = alias.getTypes();
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assertNotNull(types, "Types should not be null");
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assertEquals(1, types.size(), "Should have 1 type");
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}
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@Test
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void testGetClonedPredicate() {
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Predicate pred = Predicate.createVar("x");
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List<String> varNames = List.of();
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List<String> varTypes = List.of();
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AliasWrapper alias = new AliasWrapper("myAlias", pred, varNames, varTypes);
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Predicate cloned = alias.getClonedPredicate();
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assertNotNull(cloned, "Cloned predicate should not be null");
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assertEquals(pred.toString(), cloned.toString(), "Cloned predicate should match original");
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}
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@Test
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void testGetNewExpression() {
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Predicate pred = Predicate.createVar("x");
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List<String> varNames = List.of("x");
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List<String> varTypes = List.of("int");
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AliasWrapper alias = new AliasWrapper("myAlias", pred, varNames, varTypes);
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List<String> newNames = List.of("y");
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Expression newExpr = alias.getNewExpression(newNames);
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assertNotNull(newExpr, "New expression should not be null");
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assertEquals("y", newExpr.toString(), "Expression should have substituted variable");
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}
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@Test
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void testGetNewVariables() {
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Predicate pred = new Predicate();
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List<String> varNames = List.of("x", "y");
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List<String> varTypes = List.of("int", "int");
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AliasWrapper alias = new AliasWrapper("myAlias", pred, varNames, varTypes);
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List<String> newVars = alias.getNewVariables(context);
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assertEquals(2, newVars.size(), "Should have 2 new variables");
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assertTrue(newVars.get(0).contains("x"), "First variable should contain 'x'");
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assertTrue(newVars.get(1).contains("y"), "Second variable should contain 'y'");
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}
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@Test
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void testGetTypesWithNames() {
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Predicate pred = new Predicate();
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List<String> varNames = List.of("x", "y");
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List<String> varTypes = List.of("int", "String");
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AliasWrapper alias = new AliasWrapper("myAlias", pred, varNames, varTypes);
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List<String> newNames = List.of("a", "b");
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Map<String, CtTypeReference<?>> typesMap = alias.getTypes(newNames);
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assertEquals(2, typesMap.size(), "Map should have 2 entries");
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assertTrue(typesMap.containsKey("a"), "Map should contain 'a'");
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assertTrue(typesMap.containsKey("b"), "Map should contain 'b'");
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}
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@Test
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void testWithNoVariables() {
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Predicate pred = Predicate.createLit("true", "boolean");
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List<String> varNames = List.of();
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List<String> varTypes = List.of();
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AliasWrapper alias = new AliasWrapper("constantAlias", pred, varNames, varTypes);
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assertEquals(0, alias.getVarNames().size(), "Should have no variables");
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assertEquals(0, alias.getTypes().size(), "Should have no types");
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}
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@Test
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void testWithMultipleVariables() {
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Predicate pred = Predicate.createVar("x");
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List<String> varNames = List.of("x", "y", "z");
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List<String> varTypes = List.of("int", "double", "boolean");
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AliasWrapper alias = new AliasWrapper("multiVarAlias", pred, varNames, varTypes);
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assertEquals(3, alias.getVarNames().size(), "Should have 3 variables");
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assertEquals(3, alias.getTypes().size(), "Should have 3 types");
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}
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@Test
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void testSubstitution() {
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// Create predicate: x + y
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Predicate x = Predicate.createVar("x");
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Predicate y = Predicate.createVar("y");
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Predicate pred = Predicate.createOperation(x, "+", y);
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List<String> varNames = List.of("x", "y");
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List<String> varTypes = List.of("int", "int");
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AliasWrapper alias = new AliasWrapper("addAlias", pred, varNames, varTypes);
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List<String> newNames = List.of("a", "b");
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Expression newExpr = alias.getNewExpression(newNames);
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String exprStr = newExpr.toString();
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assertTrue(exprStr.contains("a"), "Expression should contain 'a'");
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assertTrue(exprStr.contains("b"), "Expression should contain 'b'");
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assertFalse(exprStr.contains("x"), "Expression should not contain 'x'");
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assertFalse(exprStr.contains("y"), "Expression should not contain 'y'");
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}
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}

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