make channel unit tests

app/src/androidTest/java/com/geeksville/mesh/ChannelTest.kt

@@ -0,0 +1,22 @@
+package com.geeksville.mesh
+
+
+import androidx.compose.frames.open
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import com.geeksville.mesh.model.Channel
+import org.junit.Assert
+import org.junit.Test
+import org.junit.runner.RunWith
+
+@RunWith(AndroidJUnit4::class)
+class ChannelTest {
+    @Test
+    fun channelUrlGood() {
+        open() // Needed to make Compose think we are inside a Frame
+        val ch = Channel.emulated
+
+        Assert.assertTrue(ch.getChannelUrl().toString().startsWith(Channel.prefix))
+        Assert.assertEquals(Channel(ch.getChannelUrl()), ch)
+    }
+
+}

app/src/androidTest/java/com/geeksville/mesh/ExampleInstrumentedTest.kt

@@ -1,13 +1,11 @@
 package com.geeksville.mesh
 
-import androidx.test.platform.app.InstrumentationRegistry
 import androidx.test.ext.junit.runners.AndroidJUnit4
-
+import androidx.test.platform.app.InstrumentationRegistry
+import org.junit.Assert.assertEquals
 import org.junit.Test
 import org.junit.runner.RunWith
 
-import org.junit.Assert.*
-
 /**
  * Instrumented test, which will execute on an Android device.
  *
@@ -19,6 +17,6 @@ class ExampleInstrumentedTest {
     fun useAppContext() {
         // Context of the app under test.
         val appContext = InstrumentationRegistry.getInstrumentation().targetContext
-        assertEquals("com.geeksville.com.geeksville.mesh", appContext.packageName)
+        assertEquals("com.geeksville.mesh", appContext.packageName)
     }
 }