src/test/java/org/robolectric/shadows/LinearLayoutTest.java

package org.robolectric.shadows;

import android.view.Gravity;
import android.view.ViewGroup;
import android.widget.LinearLayout;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.robolectric.Robolectric;
import org.robolectric.TestRunners;

import static org.fest.assertions.api.Assertions.assertThat;
import static org.junit.Assert.assertSame;
import static org.robolectric.Robolectric.shadowOf;

@RunWith(TestRunners.WithDefaults.class)
public class LinearLayoutTest {
    private LinearLayout linearLayout;

    @Before
    public void setup() throws Exception {
        linearLayout = new LinearLayout(Robolectric.application);
    }

    @Test
    public void getLayoutParams_shouldReturnLinearLayoutParams() throws Exception {
        ViewGroup.LayoutParams layoutParams = linearLayout.getLayoutParams();

        assertThat(layoutParams).isInstanceOf(LinearLayout.LayoutParams.class);
    }

    @Test
    public void getLayoutParams_shouldReturnTheSameLinearLayoutParamsFromTheSetter() throws Exception {
        LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(1, 2);
        linearLayout.setLayoutParams(params);

        assertSame(params, linearLayout.getLayoutParams());
    }

    @Test
    public void canAnswerOrientation() throws Exception {
        assertThat(linearLayout.getOrientation()).isEqualTo(LinearLayout.HORIZONTAL);
        linearLayout.setOrientation(LinearLayout.VERTICAL);
        assertThat(linearLayout.getOrientation()).isEqualTo(LinearLayout.VERTICAL);
        linearLayout.setOrientation(LinearLayout.HORIZONTAL);
        assertThat(linearLayout.getOrientation()).isEqualTo(LinearLayout.HORIZONTAL);
    }

    @Test
    public void canAnswerGravity() throws Exception {
        assertThat(shadowOf(linearLayout).getGravity()).isEqualTo(Gravity.TOP | Gravity.START);
        linearLayout.setGravity(Gravity.CENTER_VERTICAL);
        assertThat(shadowOf(linearLayout).getGravity()).isEqualTo(Gravity.CENTER_VERTICAL);
    }
}