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Example of Android Instrumented tests using Espresso
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| @Test | |
| fun shouldEnableButtonWhenValidMessageIsTyped() { | |
| onView(withId(R.id.messageField)).perform(typeText("you do not talk about Fight Club")) | |
| onView(withId(R.id.sendButton)).check(matches(isEnabled())) | |
| } | |
| @Test | |
| fun shouldNotEnableButtonWhenInvalidMessageIsTyped() { | |
| onView(withId(R.id.messageField)).perform(typeText("Hey, let me tell you about the Fight Club")) | |
| onView(withId(R.id.sendButton)).check(matches(not(isEnabled()))) | |
| } |
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| class FileUtils { | |
| fun getDirectoryFilesListSize(context: Context, fileDirectory: String): Int { | |
| val directory = File(context.filesDir, fileDirectory) | |
| val fileList = directory.listFiles().orEmpty() | |
| return fileList.size | |
| } | |
| } |
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| @Test | |
| fun shouldReturnNumberOfFilesInsideADirectory() { | |
| //Given | |
| val bananaDirectory = "bananas" | |
| createFileAtInternalDirectory(context, bananaDirectory, "prata") | |
| createFileAtInternalDirectory(context, bananaDirectory, "d'agua") | |
| createFileAtInternalDirectory(context, bananaDirectory, "nanica") | |
| //When | |
| val directoryFileListSize = | |
| FileUtils().getInternalDirectoryFilesListSize(context, bananaDirectory) | |
| //Then | |
| assertEquals(3, directoryFileListSize) | |
| } | |
| fun createFileAtInternalDirectory(context: Context, fileDirectory: String, fileName: String) { | |
| val path = "${context.filesDir}/$fileDirectory" | |
| val newDir = File(path).also { it.mkdirs() } | |
| val newFile = File(newDir, fileName) | |
| newFile.appendText("") | |
| } |
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