♻️ Add matcher for linked elements

[Sone.git] / src / test / kotlin / net / pterodactylus / sone / test / Matchers.kt

diff --git a/src/test/kotlin/net/pterodactylus/sone/test/Matchers.kt b/src/test/kotlin/net/pterodactylus/sone/test/Matchers.kt
index 7fc9428..9d21557 100644 (file)
--- a/src/test/kotlin/net/pterodactylus/sone/test/Matchers.kt
+++ b/src/test/kotlin/net/pterodactylus/sone/test/Matchers.kt
@@ -1,12 +1,37 @@
 package net.pterodactylus.sone.test
 
 import freenet.support.*
+import net.pterodactylus.sone.data.Post
 import net.pterodactylus.sone.freenet.wot.*
 import net.pterodactylus.sone.utils.*
 import net.pterodactylus.util.web.*
 import org.hamcrest.*
 import org.hamcrest.Matchers.*
 
+/**
+ * A kotlin-ified version of Hamcrest’s [anything()][anything]. It matches
+ * everything and has the right type, too!
+ */
+inline fun <reified T> everything(): Matcher<T> = any(T::class.java)
+
+/**
+ * Returns a [hamcrest matcher][Matcher] constructed from the given predicate.
+ */
+fun <T> matches(description: String? = null, predicate: (T) -> Boolean) = object : TypeSafeDiagnosingMatcher<T>() {
+
+       override fun matchesSafely(item: T, mismatchDescription: Description) =
+                       predicate(item).onFalse {
+                               mismatchDescription.appendValue(item).appendText(" did not match predicate")
+                       }
+
+       override fun describeTo(description: Description) {
+               description.appendText("matches predicate ").appendValue(predicate)
+       }
+
+}.let { matcher ->
+       description?.let { describedAs(description, matcher) } ?: matcher
+}
+
 fun hasHeader(name: String, value: String) = object : TypeSafeDiagnosingMatcher<Header>() {
        override fun matchesSafely(item: Header, mismatchDescription: Description) =
                        compare(item.name, { it.equals(name, ignoreCase = true) }) { mismatchDescription.appendText("name is ").appendValue(it) }
@@ -19,6 +44,10 @@ fun hasHeader(name: String, value: String) = object : TypeSafeDiagnosingMatcher<
        }
 }
 
+fun <T> handleMatcher(matcher: Matcher<T>, item: T, mismatchDescription: Description) =
+       matcher.matches(item)
+               .onFalse { matcher.describeMismatch(item, mismatchDescription) }
+
 fun <T : Any> compare(value: T, comparison: (T) -> Boolean, onError: (T) -> Unit) =
                false.takeUnless { comparison(value) }
                                ?.also { onError(value) }
@@ -77,9 +106,7 @@ fun isOwnIdentity(id: String, nickname: String, requestUri: String, insertUri: S
 
 fun hasField(name: String, valueMatcher: Matcher<String>) = object : TypeSafeDiagnosingMatcher<SimpleFieldSet>() {
        override fun matchesSafely(item: SimpleFieldSet, mismatchDescription: Description) =
-                       valueMatcher.matches(item.get(name)).onFalse {
-                               valueMatcher.describeMismatch(item, mismatchDescription)
-                       }
+               handleMatcher(valueMatcher, item.get(name), mismatchDescription)
 
        override fun describeTo(description: Description) {
                description
@@ -88,6 +115,9 @@ fun hasField(name: String, valueMatcher: Matcher<String>) = object : TypeSafeDia
        }
 }
 
+fun isPost(isRecipientId: Matcher<String?> = any(String::class.java)) = AttributeMatcher<Post>("post")
+               .addAttribute("recipient ID", { it.recipientId.orNull() }, isRecipientId)
+
 /**
  * [TypeSafeDiagnosingMatcher] implementation that aims to cut down boilerplate on verifying the attributes
  * of typical container objects.