NoSelectionModel for Grid

Fixes vaadin/framework8-issues#518

Change-Id: Ice6bdef03c3b62dd2c74376f98cfb8004dfa0bbf

1 files changed, 69 insertions, 0 deletions

diff --git a/server/src/test/java/com/vaadin/tests/components/grid/GridNoSelectionModelTest.java b/server/src/test/java/com/vaadin/tests/components/grid/GridNoSelectionModelTest.java
new file mode 100644
index 0000000000..15456bd950
--- /dev/null
+++ b/server/src/test/java/com/vaadin/tests/components/grid/GridNoSelectionModelTest.java
@@ -0,0 +1,69 @@
+package com.vaadin.tests.components.grid;
+
+import java.util.Arrays;
+import java.util.LinkedHashSet;
+import java.util.Optional;
+
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+
+import com.vaadin.server.data.provider.bov.Person;
+import com.vaadin.ui.Grid;
+import com.vaadin.ui.Grid.GridSelectionModel;
+import com.vaadin.ui.components.grid.MultiSelectionModelImpl;
+import com.vaadin.ui.components.grid.NoSelectionModel;
+import com.vaadin.ui.components.grid.SingleSelectionModelImpl;
+
+public class GridNoSelectionModelTest {
+
+    public static final Person PERSON_C = new Person("c", 3);
+    public static final Person PERSON_B = new Person("b", 2);
+    public static final Person PERSON_A = new Person("a", 1);
+
+    private Grid<Person> grid;
+    private GridSelectionModel<Person> model;
+
+    @Before
+    public void setUp() {
+        grid = new Grid<>();
+        grid.setItems(PERSON_A, PERSON_B, PERSON_C);
+
+        model = new NoSelectionModel<>(grid);
+        grid.setSelectionModel(model);
+    }
+
+    @Test
+    public void select() {
+        model.select(PERSON_A);
+
+        Assert.assertFalse(model.isSelected(PERSON_A));
+        Assert.assertEquals(0, model.getSelectedItems().size());
+        Assert.assertEquals(Optional.empty(), model.getFirstSelectedItem());
+
+        model.select(PERSON_B);
+
+        Assert.assertFalse(model.isSelected(PERSON_B));
+        Assert.assertEquals(0, model.getSelectedItems().size());
+        Assert.assertEquals(Optional.empty(), model.getFirstSelectedItem());
+    }
+
+    @Test
+    public void changingToSingleSelectionModel() {
+        grid.setSelectionModel(new SingleSelectionModelImpl<>(grid));
+
+        grid.getSelectionModel().select(PERSON_B);
+        Assert.assertEquals(PERSON_B,
+                grid.getSelectionModel().getFirstSelectedItem().get());
+    }
+
+    @Test
+    public void changingToMultiSelectionModel() {
+        grid.setSelectionModel(new MultiSelectionModelImpl<>(grid));
+
+        grid.getSelectionModel().select(PERSON_B);
+        Assert.assertEquals(new LinkedHashSet<>(Arrays.asList(PERSON_B)),
+                grid.getSelectionModel().getSelectedItems());
+    }
+
+}