How to read a text file from resources in Kotlin?

Question

I want to write a Spek test in Kotlin. The test should read an HTML file from the src/test/resources folder. How to do it?

class MySpec : Spek({         


        

Answer 1

Kotlin + Spring way:

@Autowired
private lateinit var resourceLoader: ResourceLoader

fun load() {
    val html = resourceLoader.getResource("classpath:html/file.html").file
        .readText(charset = Charsets.UTF_8)
}

Answer 2

No idea why this is so hard, but the simplest way I've found (without having to refer to a particular class) is:

fun getResourceAsText(path: String): String {
    return object {}.javaClass.getResource(path).readText()
}

And then passing in an absolute URL, e.g.

val html = getResourceAsText("/www/index.html")

Answer 3

Using Google Guava library Resources class:

import com.google.common.io.Resources;

val fileContent: String = Resources.getResource("/html/file.html").readText()

Answer 4

A slightly different solution:

class MySpec : Spek({
    describe("blah blah") {
        given("blah blah") {

            var fileContent = ""

            beforeEachTest {
                html = this.javaClass.getResource("/html/file.html").readText()
            }

            it("should blah blah") {
                ...
            }
        }
    }
})

Answer 5

val fileContent = MySpec::class.java.getResource("/html/file.html").readText()

Answer 6

another slightly different solution:

@Test
fun basicTest() {
    "/html/file.html".asResource {
        // test on `it` here...
        println(it)
    }

}

fun String.asResource(work: (String) -> Unit) {
    val content = this.javaClass::class.java.getResource(this).readText()
    work(content)
}