ToolsPropertiesTest.kt

@Test
fun testProperties() {
    val fileContent = """
slack.token=asdf
    """.trimIndent()

    val properties = Properties()
    properties.load(ByteArrayInputStream(fileContent.toByteArray()))
    val toolsProperties = ToolsProperties.parseProperties(properties)

    Assert.assertEquals("asdf", toolsProperties.slackToken)
}

@Test
fun testPropertiesMissing() {
    val fileContent = ""

    val properties = Properties()
    properties.load(ByteArrayInputStream(fileContent.toByteArray()))

    Assert.assertThrows(MissingPropertyException::class.java, {
        ToolsProperties.parseProperties(properties)
    })
}