Algorithms/JavaAlgorithms
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Fix BFS (#3759)

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Arya Sen 2022-11-09 14:40:20 -05:00 committed by GitHub
parent 4990f791a6
commit 9cde14095c
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 47 additions and 57 deletions
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57
src/main/java/com/thealgorithms/searches/BreadthFirstSearch.java
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@ -2,8 +2,6 @@ package com.thealgorithms.searches;
import com.thealgorithms.searches.DepthFirstSearch.Node;
import java.util.ArrayDeque;
import java.util.List;
import java.util.Objects;
import java.util.Optional;
import java.util.Queue;
@ -12,7 +10,6 @@ import java.util.Queue;
* @date: 31 October 2021 (Sunday)
*/
public class BreadthFirstSearch {
public static Optional<Node> search(final Node node, final String name) {
if (node.getName().equals(name)) {
return Optional.of(node);
@ -28,62 +25,8 @@ public class BreadthFirstSearch {
}
queue.addAll(current.getSubNodes());
queue.remove();
}
return Optional.empty();
}
public static void assertThat(final Object actual, final Object expected) {
if (!Objects.equals(actual, expected)) {
throw new AssertionError(
String.format("expected=%s but was actual=%s", expected, actual)
);
}
}
public static void main(final String[] args) {
final Node rootNode = new Node(
"A",
List.of(
new Node(
"B",
List.of(
new Node("D"),
new Node("F", List.of(new Node("H"), new Node("I")))
)
),
new Node("C", List.of(new Node("G"))),
new Node("E")
)
);
{
final String expected = "I";
final Node result = search(rootNode, expected)
.orElseThrow(() -> new AssertionError("Node not found!"));
assertThat(result.getName(), expected);
}
{
final String expected = "G";
final Node result = search(rootNode, expected)
.orElseThrow(() -> new AssertionError("Node not found!"));
assertThat(result.getName(), expected);
}
{
final String expected = "E";
final Node result = search(rootNode, expected)
.orElseThrow(() -> new AssertionError("Node not found!"));
assertThat(result.getName(), expected);
}
}
}

47
src/test/java/com/thealgorithms/searches/BreadthFirstSearchTest.java Normal file
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@ -0,0 +1,47 @@
package com.thealgorithms.searches;
import org.junit.jupiter.api.Test;
import java.util.List;
import java.util.Optional;
import static org.junit.jupiter.api.Assertions.*;
class BreadthFirstSearchTest {
private static final DepthFirstSearch.Node rootNode = new DepthFirstSearch.Node(
"A",
List.of(
new DepthFirstSearch.Node(
"B",
List.of(
new DepthFirstSearch.Node("D"),
new DepthFirstSearch.Node("F", List.of(new DepthFirstSearch.Node("H"), new DepthFirstSearch.Node("I")))
)
),
new DepthFirstSearch.Node("C", List.of(new DepthFirstSearch.Node("G"))),
new DepthFirstSearch.Node("E")
)
);
@Test
void searchI() {
Optional<DepthFirstSearch.Node> Inode = BreadthFirstSearch.search(rootNode, "I");
assertTrue(Inode.isPresent());
assertEquals(Inode.get().getName(), "I");
}
@Test
void searchG() {
Optional<DepthFirstSearch.Node> Gnode = BreadthFirstSearch.search(rootNode, "G");
assertTrue(Gnode.isPresent());
assertEquals(Gnode.get().getName(), "G");
}
@Test
void searchE() {
Optional<DepthFirstSearch.Node> Enode = BreadthFirstSearch.search(rootNode, "E");
assertTrue(Enode.isPresent());
assertEquals(Enode.get().getName(), "E");
}
}