Add OkHttpBuilder tests

app/src/main/java/gq/kirmanak/mealie/data/auth/impl/AuthOkHttpInterceptor.kt

@@ -3,13 +3,15 @@ package gq.kirmanak.mealie.data.auth.impl
 import okhttp3.Interceptor
 import okhttp3.Response
 
+const val AUTHORIZATION_HEADER = "Authorization"
+
 class AuthOkHttpInterceptor(token: String) : Interceptor {
     private val headerValue = "Bearer $token"
 
     override fun intercept(chain: Interceptor.Chain): Response {
         val newRequest = chain.request()
             .newBuilder()
-            .addHeader("Authorization", headerValue)
+            .addHeader(AUTHORIZATION_HEADER, headerValue)
             .build()
         return chain.proceed(newRequest)
     }

app/src/test/java/gq/kirmanak/mealie/data/impl/OkHttpBuilderTest.kt

@@ -0,0 +1,40 @@
+package gq.kirmanak.mealie.data.impl
+
+import com.google.common.truth.Truth.assertThat
+import dagger.hilt.android.testing.HiltAndroidTest
+import gq.kirmanak.mealie.data.auth.impl.AUTHORIZATION_HEADER
+import gq.kirmanak.mealie.data.auth.impl.AuthImplTestData.TEST_TOKEN
+import gq.kirmanak.mealie.data.auth.impl.MockServerTest
+import okhttp3.OkHttpClient
+import okhttp3.Request
+import okhttp3.mockwebserver.MockResponse
+import org.junit.Test
+import javax.inject.Inject
+
+@HiltAndroidTest
+class OkHttpBuilderTest : MockServerTest() {
+
+    @Inject
+    lateinit var subject: OkHttpBuilder
+
+    @Test
+    fun `when token null then no auth header`() {
+        val client = subject.buildOkHttp(null)
+        val header = sendRequestAndExtractAuthHeader(client)
+        assertThat(header).isNull()
+    }
+
+    @Test
+    fun `when token isn't null then auth header contains token`() {
+        val client = subject.buildOkHttp(TEST_TOKEN)
+        val header = sendRequestAndExtractAuthHeader(client)
+        assertThat(header).isEqualTo("Bearer $TEST_TOKEN")
+    }
+
+    private fun sendRequestAndExtractAuthHeader(client: OkHttpClient): String? {
+        mockServer.enqueue(MockResponse())
+        val request = Request.Builder().url(serverUrl).get().build()
+        client.newCall(request).execute()
+        return mockServer.takeRequest().getHeader(AUTHORIZATION_HEADER)
+    }
+}