Add more nearby tests (#3877)

* more nearby tests added

* Add tests for Label class

* Add checkbox test javadocs

* Add javadocs for label

Author: neslihanturan

app/src/test/kotlin/fr/free/nrw/commons/nearby/CheckboxTriStatesTest.kt

@@ -0,0 +1,71 @@
+package fr.free.nrw.commons.nearby
+
+import android.widget.CompoundButton
+import androidx.test.core.app.ApplicationProvider
+import com.nhaarman.mockitokotlin2.verify
+import com.nhaarman.mockitokotlin2.verifyNoMoreInteractions
+import fr.free.nrw.commons.TestCommonsApplication
+import fr.free.nrw.commons.location.LatLng
+import fr.free.nrw.commons.nearby.CheckBoxTriStates.CHECKED
+import fr.free.nrw.commons.nearby.CheckBoxTriStates.UNCHECKED
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.mockito.Mock
+import org.mockito.MockitoAnnotations
+import org.robolectric.RobolectricTestRunner
+import org.robolectric.annotation.Config
+
+@RunWith(RobolectricTestRunner::class)
+@Config(sdk = [21], application = TestCommonsApplication::class)
+class CheckBoxTriStatesTest {
+    @Mock
+    internal lateinit var callback: CheckBoxTriStates.Callback
+    @Mock
+    internal lateinit var onCheckChangeListener: CompoundButton.OnCheckedChangeListener
+    private lateinit var checkBoxTriStates: CheckBoxTriStates
+
+    /**
+     * initial setup
+     */
+    @Before
+    @Throws(Exception::class)
+    fun setUp() {
+        MockitoAnnotations.initMocks(this)
+        checkBoxTriStates = CheckBoxTriStates(ApplicationProvider.getApplicationContext())
+        checkBoxTriStates.setCallback(callback)
+        checkBoxTriStates.setOnCheckedChangeListener(onCheckChangeListener)
+    }
+
+    /**
+     * If same state is trying to be set, nothing should happen
+     */
+    @Test
+    fun testSetStateWhenSameState() {
+        checkBoxTriStates.state = CHECKED
+        checkBoxTriStates.setState(CHECKED)
+        verifyNoMoreInteractions(callback)
+    }
+
+    /**
+     * If different, markers should be filtered by new state
+     */
+    @Test
+    fun testSetStateWhenDiffState() {
+        NearbyController.currentLocation = LatLng(0.0,0.0,0.0f)
+        checkBoxTriStates.state = CHECKED
+        checkBoxTriStates.setState(UNCHECKED)
+        verify(callback).filterByMarkerType(null, UNCHECKED, false, true)
+    }
+
+    /**
+     * If current latitude longtitude null, then no more interactions required
+     */
+    @Test
+    fun testSetStateWhenCurrLatLngNull() {
+        NearbyController.currentLocation = null
+        checkBoxTriStates.state = CHECKED
+        checkBoxTriStates.setState(UNCHECKED)
+        verifyNoMoreInteractions(callback)
+    }
+}

app/src/test/kotlin/fr/free/nrw/commons/nearby/LabelTest.kt

@@ -0,0 +1,37 @@
+package fr.free.nrw.commons.nearby
+
+import fr.free.nrw.commons.R
+import fr.free.nrw.commons.R.*
+import org.junit.Before
+import org.junit.Test
+
+class LabelTest {
+    private lateinit var label: Label
+
+    /**
+     * initial setup
+     */
+    @Before
+    @Throws(Exception::class)
+    fun setUp() {
+        label = Label.fromText("Q44539")
+    }
+
+    /**
+     * test if a random label icon matches with intended one
+     */
+    @Test
+    fun testLabelIcon() {
+        assert(label.icon.equals(R.drawable.round_icon_church))
+    }
+
+    /**
+     * test if label is not found in label set, unknown icon is used
+     */
+    @Test
+    fun testNullLabelIcon() {
+        var nullLabel: Label = Label.fromText("a random text not exist in label texts")
+        assert(nullLabel.icon.equals(R.drawable.round_icon_unknown))
+    }
+
+}