package com.example.app

import android.Manifest
import android.content.pm.PackageManager
import androidx.test.espresso.Espresso.onView
import androidx.test.espresso.assertion.ViewAssertions.matches
import androidx.test.espresso.matcher.ViewMatchers.isDisplayed
import androidx.test.espresso.matcher.ViewMatchers.withId
import androidx.test.ext.junit.rules.ActivityScenarioRule
import androidx.test.ext.junit.runners.AndroidJUnit4
import androidx.test.filters.SdkSuppress
import androidx.test.platform.app.InstrumentationRegistry
import androidx.test.rule.GrantPermissionRule
import org.junit.Assert.assertEquals
import org.junit.Rule
import org.junit.Test
import org.junit.rules.RuleChain
import org.junit.rules.TestRule
import org.junit.runner.RunWith

@RunWith(AndroidJUnit4::class)
@SdkSuppress(minSdkVersion = 23)
class CameraPermissionTest {
    private val permissionRule =
        GrantPermissionRule.grant(Manifest.permission.CAMERA)
    private val activityRule =
        ActivityScenarioRule(CameraActivity::class.java)

    @get:Rule
    val rules: TestRule = RuleChain
        .outerRule(permissionRule)
        .around(activityRule)

    @Test
    fun cameraScreenOpensWithPermissionGranted() {
        val context = InstrumentationRegistry
            .getInstrumentation()
            .targetContext

        assertEquals(
            PackageManager.PERMISSION_GRANTED,
            context.checkSelfPermission(Manifest.permission.CAMERA)
        )

        onView(withId(R.id.camera_preview))
            .check(matches(isDisplayed()))
    }
}