X-Git-Url: https://git.pterodactylus.net/?p=Sone.git;a=blobdiff_plain;f=src%2Ftest%2Fkotlin%2Fnet%2Fpterodactylus%2Fsone%2Ftest%2FMatchers.kt;h=85ed9e7ee4004557c8f2bd4828dcd40411dbda89;hp=7fc9428c80a1da9a4af00e3a5aa5b8a9a1fd9a58;hb=faf66247a34f64946990a985d2ea3003465969cb;hpb=c09f9eb8062ce9395c73e341f9fcb6b015bd734a

diff --git a/src/test/kotlin/net/pterodactylus/sone/test/Matchers.kt b/src/test/kotlin/net/pterodactylus/sone/test/Matchers.kt
index 7fc9428..85ed9e7 100644
--- a/src/test/kotlin/net/pterodactylus/sone/test/Matchers.kt
+++ b/src/test/kotlin/net/pterodactylus/sone/test/Matchers.kt
@@ -5,8 +5,27 @@ import net.pterodactylus.sone.freenet.wot.*
 import net.pterodactylus.sone.utils.*
 import net.pterodactylus.util.web.*
 import org.hamcrest.*
+import org.hamcrest.Matchers
 import org.hamcrest.Matchers.*
 
+/**
+ * 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) }