#1144 FkHost fixed

src/main/java/org/takes/facets/fork/FkHost.java

@@ -25,7 +25,6 @@
 
 import lombok.EqualsAndHashCode;
 import org.cactoos.scalar.EqualsNullable;
-import org.cactoos.scalar.Ternary;
 import org.cactoos.text.Lowered;
 import org.takes.Response;
 import org.takes.Take;
@@ -69,13 +68,13 @@ public FkHost(final String host, final Take take) {
     private static Fork fork(final String host, final Take take) {
         return req -> {
             final String hst = new RqHeaders.Smart(req).single("host");
-            return new Ternary<Opt<Response>>(
-                new EqualsNullable(
-                    new Lowered(host), new Lowered(hst)
-                ),
-                new Opt.Single<>(take.act(req)),
-                new Opt.Empty<>()
-            ).value();
+            final Opt<Response> ret;
+            if (new EqualsNullable(new Lowered(host), new Lowered(hst)).value()) {
+                ret = new Opt.Single<>(take.act(req));
+            } else {
+                ret = new Opt.Empty<>();
+            }
+            return ret;
         };
     }
 

src/main/java/org/takes/facets/fork/FkWrap.java

@@ -34,7 +34,7 @@
  * <p>The class is immutable and thread-safe.
  *
  * @since 0.13
- * @see org.takes.facets.fork.RsFork
+ * @see RsFork
  */
 @EqualsAndHashCode
 public class FkWrap implements Fork {

src/main/java/org/takes/rq/RqEmpty.java

@@ -0,0 +1,69 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2014-2022 Yegor Bugayenko
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package org.takes.rq;
+
+import java.util.Arrays;
+import lombok.EqualsAndHashCode;
+import org.cactoos.io.InputStreamOf;
+
+/**
+ * Empty request, with only a head line (mostly for testing).
+ *
+ * <p>The class is immutable and thread-safe.
+ *
+ * @since 0.25
+ */
+@EqualsAndHashCode(callSuper = true)
+public final class RqEmpty extends RqWrap {
+
+    /**
+     * Ctor.
+     */
+    public RqEmpty() {
+        this("GET");
+    }
+
+    /**
+     * Ctor.
+     * @param method HTTP method
+     */
+    public RqEmpty(final CharSequence method) {
+        this(method, "/ HTTP/1.1");
+    }
+
+    /**
+     * Ctor.
+     * @param method HTTP method
+     * @param query HTTP query
+     */
+    public RqEmpty(final CharSequence method, final CharSequence query) {
+        super(
+            new RequestOf(
+                Arrays.asList(String.format("%s %s", method, query)),
+                new InputStreamOf("")
+            )
+        );
+    }
+
+}

src/test/java/org/takes/facets/fork/FkHostTest.java

@@ -23,11 +23,19 @@
  */
 package org.takes.facets.fork;
 
+import java.util.Arrays;
+import java.util.concurrent.atomic.AtomicBoolean;
 import org.hamcrest.MatcherAssert;
 import org.hamcrest.Matchers;
+import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.Test;
+import org.takes.HttpException;
+import org.takes.rq.RqEmpty;
 import org.takes.rq.RqFake;
+import org.takes.rq.RqWithHeader;
+import org.takes.rs.RsEmpty;
 import org.takes.tk.TkEmpty;
+import org.takes.tk.TkText;
 
 /**
  * Test case for {@link FkHost}.
@@ -38,17 +46,41 @@ final class FkHostTest {
     @Test
     void matchesByHost() throws Exception {
         MatcherAssert.assertThat(
-            new FkHost("www.example.com", new TkEmpty()).route(
-                new RqFake("GET", "/hel?a=1")
-            ).has(),
+            new FkHost("www.foo.com", new TkText("boom"))
+                .route(
+                    new RqWithHeader(
+                        new RqEmpty(),
+                        "Host: www.foo.com"
+                    )
+                )
+                .has(),
             Matchers.is(true)
         );
+    }
+
+    @Test
+    void doesntMatchByHost() throws Exception {
+        final AtomicBoolean acted = new AtomicBoolean();
         MatcherAssert.assertThat(
-            new FkHost("google.com", new TkEmpty()).route(
-                new RqFake("PUT", "/?test")
-            ).has(),
+            new FkHost(
+                "google.com",
+                req -> {
+                    acted.set(true);
+                    return new RsEmpty();
+                }
+            ).route(new RqFake("PUT", "/?test")).has(),
             Matchers.is(false)
         );
+        MatcherAssert.assertThat(acted.get(), Matchers.is(false));
+    }
+
+    @Test
+    void doesntMatchWithNoHost() {
+        Assertions.assertThrows(
+            HttpException.class,
+            () -> new FkHost("google.com", new TkEmpty())
+                .route(new RqFake(Arrays.asList("GET / HTTP/1.1"), "body"))
+        );
     }
 
 }