Add test cases back

Author: mustard-mh

components/ide/jetbrains/backend-plugin/src/test/kotlin/io/gitpod/jetbrains/remote/util/LocalHostUriTest.kt

@@ -0,0 +1,69 @@
+// Copyright (c) 2022 Gitpod GmbH. All rights reserved.
+// Licensed under the GNU Affero General Public License (AGPL).
+// See License.AGPL.txt in the project root for license information.
+
+package io.gitpod.jetbrains.remote.util
+
+import io.gitpod.jetbrains.remote.utils.LocalHostUri
+import io.gitpod.jetbrains.remote.utils.LocalHostUri.LocalHostUriMetadata
+import java.net.URI
+import kotlin.test.Test
+import kotlin.test.assertEquals
+import kotlin.test.assertTrue
+
+internal class LocalHostUriTest {
+    @Test
+    fun testExtractLocalHostUriMetaDataForPortMapping() {
+        val urlToMetadataMap = mapOf(
+            "https://localhost:80" to object: LocalHostUriMetadata {
+                override val address = "localhost"
+                override val port = 80
+            },
+            "https://localhost" to object: LocalHostUriMetadata {
+                override val address = "localhost"
+                override val port = 443
+            },
+            "http://localhost:12354" to object: LocalHostUriMetadata {
+                override val address = "localhost"
+                override val port = 12354
+            },
+            "https://127.0.0.1:3000" to object: LocalHostUriMetadata {
+                override val address = "127.0.0.1"
+                override val port = 3000
+            },
+            "http://127.0.0.1:5000" to object: LocalHostUriMetadata {
+                override val address = "127.0.0.1"
+                override val port = 5000
+            },
+            "http://[::1]:8080" to object: LocalHostUriMetadata {
+                override val address = "::"
+                override val port = 8080
+            },
+        )
+
+        urlToMetadataMap.forEach { (url, expected) ->
+            val uri = URI.create(url)
+            val actualLocalHostUriMetadataOptional = LocalHostUri.extractLocalHostUriMetaDataForPortMapping(uri)
+            val actual = actualLocalHostUriMetadataOptional.get()
+
+            assertEquals(expected.address, actual.address)
+            assertEquals(expected.port, actual.port)
+        }
+
+        val urlsThatShouldReturnEmpty = listOf(
+            "https://localhost:123b",
+            "http://192.168.0.1:4000",
+            "https://example.com?cb=localhost",
+            "https://example.com?cb=http://localhost",
+            "https://example.com?cb=https://localhost:8080",
+            "https://example.com?cb=https://127.0.0.1:8080"
+        )
+
+        urlsThatShouldReturnEmpty.forEach { url ->
+            val uri = URI.create(url)
+            val localHostUriMetaDataForPort = LocalHostUri.extractLocalHostUriMetaDataForPortMapping(uri)
+
+            assertTrue(localHostUriMetaDataForPort.isEmpty)
+        }
+    }
+}