TestMvcBean.java

/*
 * Copyright 2016 Kejun Xia
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.shipdream.lib.android.mvc;

import org.junit.Assert;
import org.junit.Test;

import java.util.concurrent.Executors;

public class TestMvcBean extends BaseTest {
    @Test(expected = IllegalArgumentException.class)
    public void should_throw_exception_when_bind_null_to_a_mvcBean() {
        Bean bean = new Bean() {
            @Override
            public Class modelType() {
                return String.class;
            }
        };

        bean.bindModel(null);
    }

    @Test
    public void should_be_able_to_inject_background_executor_service() throws InterruptedException {
        class Worker {
            Thread thread = Thread.currentThread();
        }
        final Worker worker = new Worker();

        Executors.newSingleThreadExecutor().submit(new Runnable() {
            @Override
            public void run() {
                synchronized (worker) {
                    worker.thread = Thread.currentThread();
                    worker.notify();
                }
            }
        });

        synchronized (worker) {
            worker.wait(1000);
        }

        Assert.assertTrue(worker.thread != Thread.currentThread());
    }

    @Test
    public void should_rebind_state_after_restoring_mvcBean() {
        Bean<String> bean = new Bean() {

            @Override
            public Class modelType() {
                return String.class;
            }
        };

        Assert.assertNull(bean.getModel());

        bean.restoreModel("A");

        Assert.assertEquals("A", bean.getModel());
    }

    @Test
    public void should_call_on_restore_call_back_after_a_stateful_mvcBean_is_restored() {
        class MyBean extends Bean<String> {
            private boolean called = false;

            @Override
            public Class modelType() {
                return String.class;
            }

            @Override
            public void onRestored() {
                super.onRestored();
                called = true;
            }
        };

        MyBean mvcBean = new MyBean();

        Assert.assertFalse(mvcBean.called);

        mvcBean.restoreModel("A");

        Assert.assertTrue(mvcBean.called);
    }

    @Test
    public void should_not_call_on_restore_call_back_after_a_non_stateful_mvcBean_is_restored() {
        class MyBean extends Bean<String> {
            private boolean called = false;

            @Override
            public Class modelType() {
                return null;
            }

            @Override
            public void onRestored() {
                super.onRestored();
                called = true;
            }
        };

        MyBean mvcBean = new MyBean();

        Assert.assertFalse(mvcBean.called);

        mvcBean.restoreModel("A");

        Assert.assertFalse(mvcBean.called);
    }

    public void should_create_state_instance_on_construct_when_the_state_type_is_specified_for_a_mvcBean() {
        class MyBean extends Bean<String> {
            @Override
            public Class modelType() {
                return String.class;
            }
        };
        MyBean mvcBean = new MyBean();

        Assert.assertNull(mvcBean.getModel());

        mvcBean.onCreated();

        Assert.assertNotNull(mvcBean.getModel());
    }

    public void should_NOT_create_state_instance_on_construct_when_the_state_type_is_null_for_a_mvcBean() {
        class MyBean extends Bean {
            @Override
            public Class modelType() {
                return null;
            }
        };
        MyBean mvcBean = new MyBean();

        Assert.assertNull(mvcBean.getModel());

        mvcBean.onCreated();

        Assert.assertNull(mvcBean.getModel());
    }

    @Test(expected = RuntimeException.class)
    public void should_throw_exception_out_when_creating_state_failed() {
        class BadClass {
            {int x = 1 / 0;}
        }

        class MyBean extends Bean<BadClass> {
            @Override
            public Class<BadClass> modelType() {
                return BadClass.class;
            }
        };

        MyBean mvcBean = new MyBean();

        mvcBean.onCreated();
    }

    @Test(expected = IllegalArgumentException.class)
    public void should_throw_exception_when_binding_null_to_stateful_mvcBean() {
        class MyBean extends Bean<String> {
            @Override
            public Class<String> modelType() {
                return String.class;
            }
        };

        MyBean mvcBean = new MyBean();

        mvcBean.bindModel(null);
    }

    @Test
    public void should_be_able_to_successfully_bind_state_to_stateful_mvcBean() {
        class MyBean extends Bean<String> {
            @Override
            public Class<String> modelType() {
                return String.class;
            }
        };

        MyBean mvcBean = new MyBean();

        Assert.assertNotEquals("B", mvcBean.getModel());

        mvcBean.bindModel("B");

        Assert.assertEquals("B", mvcBean.getModel());
    }

}