Add test case for dependency that takes a long time to become healthy.

This currently fails on Linux due to
square/okhttp#4233.

app/src/journeyTest/kotlin/batect/journeytests/TaskWithSlowHealthyDependencyJourneyTest.kt

@@ -0,0 +1,49 @@
+/*
+   Copyright 2017-2018 Charles Korn.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
+package batect.journeytests
+
+import batect.journeytests.testutils.ApplicationRunner
+import batect.journeytests.testutils.itCleansUpAllContainersItCreates
+import batect.journeytests.testutils.itCleansUpAllNetworksItCreates
+import com.natpryce.hamkrest.assertion.assertThat
+import com.natpryce.hamkrest.containsSubstring
+import com.natpryce.hamkrest.equalTo
+import org.jetbrains.spek.api.Spek
+import org.jetbrains.spek.api.dsl.given
+import org.jetbrains.spek.api.dsl.it
+import org.jetbrains.spek.api.dsl.on
+
+object TaskWithSlowHealthyDependencyJourneyTest : Spek({
+    given("a task with a healthy dependency that takes a long time to become healthy") {
+        val runner = ApplicationRunner("task-with-slow-healthy-dependency")
+
+        on("running that task") {
+            val result = runner.runApplication(listOf("the-task"))
+
+            it("displays the output from that task") {
+                assertThat(result.output, containsSubstring("Started!"))
+            }
+
+            it("returns the exit code from that task") {
+                assertThat(result.exitCode, equalTo(0))
+            }
+
+            itCleansUpAllContainersItCreates(result)
+            itCleansUpAllNetworksItCreates(result)
+        }
+    }
+})

app/src/journeyTest/resources/task-with-slow-healthy-dependency/batect.yml

@@ -0,0 +1,17 @@
+project_name: task-with-slow-healthy-dependency-test
+
+containers:
+  build-env:
+    image: alpine:3.7
+
+  dependency:
+    build_directory: dependency
+
+
+tasks:
+  the-task:
+    run:
+      container: build-env
+      command: "sh -c 'echo Started!'"
+    dependencies:
+      - dependency

app/src/journeyTest/resources/task-with-slow-healthy-dependency/dependency/Dockerfile

@@ -0,0 +1,5 @@
+FROM alpine:3.7
+
+COPY health-check.sh /tools/
+
+HEALTHCHECK --interval=2s --timeout=15s --retries=1 CMD /tools/health-check.sh

app/src/journeyTest/resources/task-with-slow-healthy-dependency/dependency/health-check.sh

@@ -0,0 +1,6 @@
+#!/usr/bin/env sh
+
+set -e
+
+sleep 11
+exit 0