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LambdaParserTest for getFreeVariables()

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Johanna Stuber 2021-01-29 00:37:29 +01:00
parent f82d316bbf
commit 6bf0ef11a5
1 changed files with 105 additions and 0 deletions
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src/test/java/edu/kit/typicalc/model/term/LambdaTermTest.java Normal file
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package edu.kit.typicalc.model.term;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.Test;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashSet;
import static org.junit.jupiter.api.Assertions.assertEquals;
public class LambdaTermTest {
private static VarTerm x1;
private static VarTerm x2;
private static VarTerm x3;
private static VarTerm x4;
private static ConstTerm c;
@BeforeAll
static void setUp() {
x1 = new VarTerm("x1");
x2 = new VarTerm("x2");
x3 = new VarTerm("x3");
x4 = new VarTerm("x4");
c = new BooleanTerm(true);
}
@Test
public void freeVariablesVarTerm() {
assertEquals(new HashSet<>(Collections.singletonList(x1)), x1.getFreeVariables());
}
@Test
public void freeVariablesConstTerm() {
assertEquals(new HashSet<>(), c.getFreeVariables());
}
@Test
public void freeVariablesAbsTerm() {
AbsTerm abs1 = new AbsTerm(x1, x2);
assertEquals(new HashSet<>(Collections.singletonList(x2)), abs1.getFreeVariables());
AbsTerm abs2 = new AbsTerm(x1, x1);
assertEquals(new HashSet<>(), abs2.getFreeVariables());
AbsTerm abs3 = new AbsTerm(x1, new AbsTerm(x2, new AppTerm(x1, x2)));
assertEquals(new HashSet<>(), abs3.getFreeVariables());
AbsTerm abs4 = new AbsTerm(x1, new AppTerm(x1, x2));
assertEquals(new HashSet<>(Collections.singletonList(x2)), abs4.getFreeVariables());
AbsTerm abs5 = new AbsTerm(x1, c);
assertEquals(new HashSet<>(), abs5.getFreeVariables());
AbsTerm abs6 = new AbsTerm(x1, new AppTerm(x1, new AppTerm(x2, x3)));
assertEquals(new HashSet<>(Arrays.asList(x2, x3)), abs6.getFreeVariables());
}
@Test
public void freeVariablesAppTerm() {
AppTerm app1 = new AppTerm(x1, x1);
assertEquals(new HashSet<>(Collections.singletonList(x1)), app1.getFreeVariables());
AppTerm app2 = new AppTerm(x1, x2);
assertEquals(new HashSet<>(Arrays.asList(x1, x2)), app2.getFreeVariables());
AppTerm app3 = new AppTerm(x1, new AbsTerm(x2, new AppTerm(x1, x2)));
assertEquals(new HashSet<>(Collections.singletonList(x1)), app3.getFreeVariables());
AppTerm app4 = new AppTerm(x1, c);
assertEquals(new HashSet<>(Collections.singletonList(x1)), app4.getFreeVariables());
AppTerm app5 = new AppTerm(x1, new AbsTerm(x1, new AppTerm(x1, x2)));
assertEquals(new HashSet<>(Arrays.asList(x1, x2)), app5.getFreeVariables());
}
@Test
public void freeVariablesLetTerm() {
LetTerm let1 = new LetTerm(x1, x2, x1);
assertEquals(new HashSet<>(Collections.singletonList(x2)), let1.getFreeVariables());
LetTerm let2 = new LetTerm(x1, new AbsTerm(x2, x2), x1);
assertEquals(new HashSet<>(), let2.getFreeVariables());
LetTerm let3 = new LetTerm(x1, new AbsTerm(x3, x3), new AbsTerm(x2, new AppTerm(x1, x2)));
assertEquals(new HashSet<>(), let3.getFreeVariables());
LetTerm let4 = new LetTerm(x1, new AppTerm(x2, c), new AbsTerm(x3, new AppTerm(x3, new AppTerm(x1, x4))));
assertEquals(new HashSet<>(Arrays.asList(x2, x4)), let4.getFreeVariables());
}
@Test
public void freeVariablesComplexTerm() {
// let x1 = (x2 let x1 = \x2. x2 in x1) in x3 (\x3. x1 x4 \x4. x4)
LetTerm let = new LetTerm(x1,
new AppTerm(x2, new LetTerm(x1, new AbsTerm(x2, x2), x1)),
new AppTerm(x3, new AppTerm(x3, new AppTerm(x1,
new AppTerm(x4, new AbsTerm(x4, x4))))));
assertEquals(new HashSet<>(Arrays.asList(x2, x3, x4)), let.getFreeVariables());
}
}