Add VariableUpdaterTask.

VariableUpdaterTask updates a variable countinously.

1 files changed, 62 insertions, 0 deletions

diff --git a/same/src/test/java/com/orbekk/same/VariableUpdaterTaskTest.java b/same/src/test/java/com/orbekk/same/VariableUpdaterTaskTest.java
new file mode 100644
index 0000000..3ecf444
--- /dev/null
+++ b/same/src/test/java/com/orbekk/same/VariableUpdaterTaskTest.java
@@ -0,0 +1,62 @@
+package com.orbekk.same;
+
+import static org.junit.Assert.*;
+
+import org.junit.Before;
+import org.junit.Test;
+import static org.mockito.Mockito.*;
+
+public class VariableUpdaterTaskTest {
+    Variable<String> v;
+    VariableUpdaterTask<String> updater;
+    
+    @Before public void setUp() {
+        v = mock(Variable.class);
+        updater = new VariableUpdaterTask<String>(v);
+    }
+        
+    @Test
+    public void updatesValue() {
+        updater.set("FirstValue");
+        updater.performWork();
+        verify(v).set("FirstValue");
+    }
+
+    @Test
+    public void noUpdateIfNotSet() {
+        updater.set("FirstValue");
+        updater.performWork();
+        reset(v);
+        updater.performWork();
+        verify(v, never()).set(anyString());
+    }
+    
+    @Test
+    public void noUpdateIfNotReady() {
+        updater.set("FirstValue");
+        updater.performWork();
+        reset(v);
+        updater.set("SecondValue");
+        updater.performWork();
+        verify(v, never()).set(anyString());
+    }
+    
+    @Test
+    public void updatesWhenReady() {
+        updater.set("Value1");
+        updater.performWork();
+        reset(v);
+        updater.valueChanged(null);
+        updater.set("Value2");
+        updater.performWork();
+        verify(v).set("Value2");
+    }
+    
+    @Test
+    public void choosesLastUpdate() {
+        updater.set("FirstValue");
+        updater.set("SecondValue");
+        updater.performWork();
+        verify(v).set("SecondValue");
+    }
+}