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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.config.model.graph;
import com.yahoo.config.model.ConfigModelContext;
import com.yahoo.config.model.test.MockRoot;
import org.junit.jupiter.api.Test;
import java.util.List;
import static org.junit.jupiter.api.Assertions.*;
/**
* @author Ulf Lilleengen
* @since 5.1
*/
public class ModelGraphTest {
void assertOrdering(ModelGraph graph, String expectedOrdering) {
List<ModelNode> sortedEntries = graph.topologicalSort();
StringBuilder sb = new StringBuilder();
for (ModelNode<?> node : sortedEntries) {
sb.append(node.builder.getModelClass().getSimpleName());
}
assertEquals(expectedOrdering, sb.toString());
}
@Test
void require_that_dependencies_are_correctly_set() {
ModelGraphBuilder builder = new ModelGraphBuilder();
builder.addBuilder(new GraphMock.BC()).addBuilder(new GraphMock.BB()).addBuilder(new GraphMock.BA());
ModelGraph graph = builder.build();
List<ModelNode> nodes = graph.getNodes();
assertEquals(3, graph.getNodes().size());
assertTrue(nodes.get(0).hasDependencies());
assertTrue(nodes.get(1).hasDependencies());
assertFalse(nodes.get(2).hasDependencies());
assertTrue(nodes.get(0).dependsOn(nodes.get(1)));
assertTrue(nodes.get(1).dependsOn(nodes.get(2)));
assertFalse(nodes.get(2).dependsOn(nodes.get(0)));
}
@Test
void require_that_dependencies_are_correctly_sorted() {
ModelGraph graph = new ModelGraphBuilder().addBuilder(new GraphMock.BC()).addBuilder(new GraphMock.BB()).addBuilder(new GraphMock.BA()).build();
assertOrdering(graph, "ABC");
}
@Test
void require_that_cycles_are_detected() {
assertThrows(IllegalArgumentException.class, () -> {
ModelGraph graph = new ModelGraphBuilder().addBuilder(new GraphMock.BD()).addBuilder(new GraphMock.BE()).build();
assertEquals(2, graph.getNodes().size());
assertTrue(graph.getNodes().get(0).dependsOn(graph.getNodes().get(1)));
assertTrue(graph.getNodes().get(1).dependsOn(graph.getNodes().get(0)));
graph.topologicalSort();
});
}
@Test
void require_that_instance_can_be_created() {
ModelGraph graph = new ModelGraphBuilder().addBuilder(new GraphMock.BC()).addBuilder(new GraphMock.BB()).addBuilder(new GraphMock.BA()).build();
List<ModelNode> nodes = graph.topologicalSort();
MockRoot root = new MockRoot();
GraphMock.A a = (GraphMock.A) nodes.get(0).createModel(ConfigModelContext.create(root.getDeployState(), null, null, root, "first"));
GraphMock.B b = (GraphMock.B) nodes.get(1).createModel(ConfigModelContext.create(root.getDeployState(), null, null, root, "second"));
GraphMock.B b2 = (GraphMock.B) nodes.get(1).createModel(ConfigModelContext.create(root.getDeployState(), null, null, root, "second2"));
GraphMock.C c = (GraphMock.C) nodes.get(2).createModel(ConfigModelContext.create(root.getDeployState(), null, null, root, "third"));
assertNotNull(a);
assertNotNull(b);
assertNotNull(b2);
assertNotNull(c);
assertEquals("first", a.getId());
assertEquals("second", b.getId());
assertEquals("second2", b2.getId());
assertEquals("third", c.getId());
assertEquals(a, b.a);
assertNotNull(c.b);
assertEquals(2, c.b.size());
assertTrue(c.b.contains(b));
assertTrue(c.b.contains(b2));
}
@Test
void require_that_context_must_be_first_ctor_param() {
Throwable exception = assertThrows(IllegalArgumentException.class, () -> {
ModelNode node = new ModelNode(new GraphMock.Bad.Builder());
MockRoot root = new MockRoot();
node.createModel(ConfigModelContext.create(root.getDeployState(), null, null, root, "foo"));
});
assertTrue(exception.getMessage().contains("Constructor for " + GraphMock.Bad.class.getName() + " must have as its first argument a " + ConfigModelContext.class.getName()));
}
@Test
void require_that_ctor_arguments_must_be_models_or_collections_of_models() {
Throwable exception = assertThrows(IllegalArgumentException.class, () -> {
ModelNode node = new ModelNode(new GraphMock.Bad2.Builder());
MockRoot root = new MockRoot();
node.createModel(ConfigModelContext.create(root.getDeployState(), null, null, root, "foo"));
});
assertTrue(exception.getMessage().contains("Unable to find constructor argument class java.lang.String for com.yahoo.config.model.graph.GraphMock$Bad2"));
}
@Test
void require_that_collections_can_be_empty() {
ModelGraph graph = new ModelGraphBuilder().addBuilder(new GraphMock.BC()).addBuilder(new GraphMock.BA()).build();
List<ModelNode> nodes = graph.topologicalSort();
MockRoot root = new MockRoot();
GraphMock.A a = (GraphMock.A) nodes.get(0).createModel(ConfigModelContext.create(root.getDeployState(), null, null, root, "first"));
GraphMock.C c = (GraphMock.C) nodes.get(1).createModel(ConfigModelContext.create(root.getDeployState(), null, null, root, "second"));
assertEquals(a, c.a);
assertTrue(c.b.isEmpty());
}
}
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