diff --git a/demo/src/androidTest/java/info/hannes/slidingup/demo/Matcher.kt b/demo/src/androidTest/java/info/hannes/slidingup/demo/Matcher.kt
new file mode 100644
index 0000000..9ef6ae9
--- /dev/null
+++ b/demo/src/androidTest/java/info/hannes/slidingup/demo/Matcher.kt
@@ -0,0 +1,42 @@
+package info.hannes.slidingup.demo
+
+import android.util.Log
+import android.view.View
+import androidx.test.espresso.UiController
+import androidx.test.espresso.ViewAction
+import androidx.test.espresso.matcher.BoundedMatcher
+import androidx.test.espresso.matcher.ViewMatchers
+import com.sothree.slidinguppanel.PanelState
+import com.sothree.slidinguppanel.SlidingUpPanelLayout
+import org.hamcrest.Description
+import org.hamcrest.Matcher
+
+fun withValue(expectedValue: PanelState): Matcher<View?> {
+    return object : BoundedMatcher<View?, SlidingUpPanelLayout>(SlidingUpPanelLayout::class.java) {
+        override fun describeTo(description: Description) {
+            description.appendText("expected: $expectedValue")
+        }
+
+        override fun matchesSafely(slider: SlidingUpPanelLayout): Boolean {
+            Log.d("slider", slider.panelState.toString())
+            return slider.panelState == expectedValue
+        }
+    }
+}
+
+fun setValue(value: PanelState): ViewAction {
+    return object : ViewAction {
+        override fun getDescription(): String {
+            return "Set Slider value to $value"
+        }
+
+        override fun getConstraints(): Matcher<View> {
+            return ViewMatchers.isAssignableFrom(SlidingUpPanelLayout::class.java)
+        }
+
+        override fun perform(uiController: UiController?, view: View) {
+            val seekBar = view as SlidingUpPanelLayout
+            seekBar.panelState = value
+        }
+    }
+}
\ No newline at end of file
diff --git a/demo/src/androidTest/java/info/hannes/slidingup/demo/StartTest.kt b/demo/src/androidTest/java/info/hannes/slidingup/demo/StartTest.kt
index be98c89..aa38d7b 100644
--- a/demo/src/androidTest/java/info/hannes/slidingup/demo/StartTest.kt
+++ b/demo/src/androidTest/java/info/hannes/slidingup/demo/StartTest.kt
@@ -1,12 +1,24 @@
 package info.hannes.slidingup.demo
 
+import android.util.Log
+import android.view.View
+import androidx.test.espresso.assertion.ViewAssertions.matches
+import com.sothree.slidinguppanel.demo.R
 import androidx.test.core.graphics.writeToTestStorage
-import androidx.test.espresso.Espresso
+import androidx.test.espresso.Espresso.onView
+import androidx.test.espresso.UiController
+import androidx.test.espresso.ViewAction
+import androidx.test.espresso.matcher.BoundedMatcher
 import androidx.test.espresso.matcher.ViewMatchers
+import androidx.test.espresso.matcher.ViewMatchers.withId
 import androidx.test.espresso.screenshot.captureToBitmap
 import androidx.test.ext.junit.rules.activityScenarioRule
 import androidx.test.ext.junit.runners.AndroidJUnit4
+import com.sothree.slidinguppanel.PanelState
+import com.sothree.slidinguppanel.SlidingUpPanelLayout
 import com.sothree.slidinguppanel.demo.DemoActivity
+import org.hamcrest.Description
+import org.hamcrest.Matcher
 import org.junit.Rule
 import org.junit.Test
 import org.junit.rules.TestName
@@ -15,6 +27,8 @@ import org.junit.runner.RunWith
 @RunWith(AndroidJUnit4::class)
 class StartTest {
 
+    private val WAIT_SLIDER = 600L
+
     @get:Rule
     val activityScenarioRule = activityScenarioRule<DemoActivity>()
 
@@ -23,9 +37,50 @@ class StartTest {
 
     @Test
     fun smokeTestSimplyStart() {
-        Thread.sleep(1000)
-        Espresso.onView(ViewMatchers.isRoot())
+        onView(ViewMatchers.isRoot())
             .captureToBitmap()
             .writeToTestStorage("${javaClass.simpleName}_${nameRule.methodName}")
     }
+
+    @Test
+    fun testExpand() {
+        onView(ViewMatchers.isRoot())
+            .captureToBitmap()
+            .writeToTestStorage("${javaClass.simpleName}_${nameRule.methodName}-1")
+        onView(withId(R.id.sliding_layout)).check(matches(withValue(PanelState.COLLAPSED)))
+
+        onView(withId(R.id.sliding_layout)).perform(setValue(PanelState.EXPANDED))
+
+        Thread.sleep(WAIT_SLIDER)
+        onView(withId(R.id.sliding_layout)).check(matches(withValue(PanelState.EXPANDED)))
+        onView(ViewMatchers.isRoot())
+            .captureToBitmap()
+            .writeToTestStorage("${javaClass.simpleName}_${nameRule.methodName}-2")
+
+        onView(withId(R.id.sliding_layout)).perform(setValue(PanelState.COLLAPSED))
+        Thread.sleep(WAIT_SLIDER)
+        onView(withId(R.id.sliding_layout)).check(matches(withValue(PanelState.COLLAPSED)))
+        onView(ViewMatchers.isRoot())
+            .captureToBitmap()
+            .writeToTestStorage("${javaClass.simpleName}_${nameRule.methodName}-3")
+    }
+
+    @Test
+    fun testAnchorWithoutSetAnchored() {
+        onView(withId(R.id.sliding_layout)).check(matches(withValue(PanelState.COLLAPSED)))
+
+        onView(withId(R.id.sliding_layout)).perform(setValue(PanelState.EXPANDED))
+
+        Thread.sleep(WAIT_SLIDER)
+        onView(withId(R.id.sliding_layout)).check(matches(withValue(PanelState.EXPANDED)))
+
+        // without state anchored, a state ANCHORED should be ignored
+        onView(withId(R.id.sliding_layout)).perform(setValue(PanelState.ANCHORED))
+        Thread.sleep(WAIT_SLIDER)
+        // should be still EXPANDED
+        onView(withId(R.id.sliding_layout)).check(matches(withValue(PanelState.EXPANDED)))
+        onView(ViewMatchers.isRoot())
+            .captureToBitmap()
+            .writeToTestStorage("${javaClass.simpleName}_${nameRule.methodName}-2")
+    }
 }