"Unresolved reference:" errors with testCompile

Question

Currently, I'm getting Unresolved reference: spek and Unresolved reference: test with testCompile / testRuntime:

project(":core") {
        apply plugin: "kotlin"

        dependencies {
            // ... other dependencies
            testCompile "org.jetbrains.kotlin:kotlin-test-junit:$kotlinVersion"
            testCompile "org.jetbrains.spek:spek-api:$spekVersion"
            testRuntime "org.jetbrains.spek:spek-junit-platform-engine:$spekVersion"
            testCompile "com.nhaarman:mockito-kotlin:$mockitoVersion"
            testCompile "com.natpryce:hamkrest:$hamkrestVersion"
        }
    }

However, when I switch them with compile / runtime, I can run the tests successfully!

Here's my spek test:

package com.mysampleapp

import org.jetbrains.spek.api.Spek
import org.jetbrains.spek.api.dsl.describe
import org.jetbrains.spek.api.dsl.it
import kotlin.test.assertEquals

class DummySpec : Spek({
    describe("a dummy") {
        it("contains a number") {
            val dummy = Dummy(1)

            assertEquals(1, dummy.number)
        }
    }
})

Could someone please help me to debug this?

Thank you

Answer 1

I found out the cause. My tests are inside my Source Folder.

To fix this, I moved my tests out, so Source Folder will not overlap with Tests Source Folder.