new method contains() in Objectionary and OyFake

eo-maven-plugin/src/main/java/org/eolang/maven/objectionary/Objectionary.java

@@ -34,10 +34,25 @@
 public interface Objectionary {
     /**
      * Resolve object.
+     *
      * @param name Object name.
      * @return Object code.
      * @throws IOException If fails to fetch.
      */
     Input get(String name) throws IOException;
 
+    /**
+     * Checks whether an Objectionary contains a provided object.
+     * @param name Object name.
+     * @return Object code.
+     * @throws IOException If fails to fetch.
+     */
+    /**
+     * Checks whether an Objectionary contains a provided object.
+     *
+     * @param name Object name.
+     * @return Boolean: "true" if found, "false" if not.
+     * @throws IOException If fails to fetch.
+     */
+    boolean contains(String name) throws IOException;
 }

eo-maven-plugin/src/main/java/org/eolang/maven/objectionary/OyCaching.java

@@ -102,4 +102,9 @@ public Input get(final String name) throws IOException {
             )
         );
     }
+
+    @Override
+    public boolean contains(final String name) throws IOException {
+        return this.primary.contains(name);
+    }
 }

eo-maven-plugin/src/main/java/org/eolang/maven/objectionary/OyEmpty.java

@@ -43,4 +43,9 @@ public Input get(final String name) throws IOException {
         throw new IOException("Empty objectionary");
     }
 
+    @Override
+    public boolean contains(final String name) throws IOException {
+        throw new IOException("Empty objectionary");
+    }
+
 }

eo-maven-plugin/src/main/java/org/eolang/maven/objectionary/OyFallback.java

@@ -77,4 +77,10 @@ public Input get(final String name) throws IOException {
             )
         ).apply(name);
     }
+
+    @Override
+    @SuppressWarnings("unchecked")
+    public boolean contains(final String name) throws IOException {
+        return this.first.contains(name) || this.second.contains(name);
+    }
 }

eo-maven-plugin/src/main/java/org/eolang/maven/objectionary/OyFallbackSwap.java

@@ -90,6 +90,11 @@ public Input get(final String name) throws IOException {
         return this.swapped.value().get(name);
     }
 
+    @Override
+    public boolean contains(final String name) throws IOException {
+        return this.swapped.value().contains(name);
+    }
+
     @Override
     public String toString() {
         return this.swapped.value().toString();

eo-maven-plugin/src/main/java/org/eolang/maven/objectionary/OyHome.java

@@ -23,7 +23,10 @@
  */
 package org.eolang.maven.objectionary;
 
+import com.jcabi.log.Logger;
 import java.io.FileNotFoundException;
+import java.nio.file.Files;
+import java.nio.file.InvalidPathException;
 import java.nio.file.Path;
 import org.cactoos.Input;
 import org.cactoos.io.InputOf;
@@ -82,9 +85,31 @@ public Input get(final String name) throws FileNotFoundException {
                 .resolve(this.version),
             "eo"
         );
-        if (!file.toFile().exists()) {
+        if (!Files.exists(file)) {
             throw new FileNotFoundException(name);
         }
         return new InputOf(file);
     }
+
+    @Override
+    public boolean contains(final String name) {
+        boolean ret;
+        try {
+            ret = Files.exists(
+                new Place(name).make(
+                    this.home
+                        .resolve("pulled")
+                        .resolve(this.version),
+                "eo"
+                )
+            );
+        } catch (final InvalidPathException ex) {
+            Logger.debug(
+                this, "The object '%s' is absent in %s...",
+                name, this.home
+            );
+            ret = false;
+        }
+        return ret;
+    }
 }

eo-maven-plugin/src/main/java/org/eolang/maven/objectionary/OyRemote.java

@@ -25,10 +25,12 @@
 
 import com.jcabi.log.Logger;
 import java.io.IOException;
+import java.io.InputStream;
 import java.net.MalformedURLException;
 import java.net.URL;
 import org.cactoos.Input;
 import org.cactoos.io.InputOf;
+import org.cactoos.scalar.Unchecked;
 import org.eolang.maven.Place;
 import org.eolang.maven.hash.CommitHash;
 
@@ -71,6 +73,22 @@ public Input get(final String name) throws MalformedURLException {
         return new InputOf(url);
     }
 
+    @Override
+    public boolean contains(final String name) throws MalformedURLException {
+        final URL url = this.template.value(name);
+        boolean presence;
+        try (InputStream inputStream = new Unchecked<>(() -> url).value().openStream()) {
+            presence = true;
+        } catch (final IOException ex) {
+            Logger.debug(
+                this, "The object '%s' is absent in %s...",
+                name, url
+            );
+            presence = false;
+        }
+        return presence;
+    }
+
     /**
      * Objectionary URL template.
      * Assumes two placeholders in terms of

eo-maven-plugin/src/test/java/org/eolang/maven/AssembleMojoTest.java

@@ -25,9 +25,7 @@
 
 import java.nio.file.Path;
 import java.nio.file.Paths;
-import org.cactoos.io.InputOf;
 import org.cactoos.set.SetOf;
-import org.eolang.maven.objectionary.Objectionary;
 import org.eolang.maven.util.Home;
 import org.eolang.maven.util.Online;
 import org.hamcrest.MatcherAssert;
@@ -73,9 +71,7 @@ void assemblesTogether(@TempDir final Path temp) throws Exception {
             .with("ignoreTransitive", true)
             .with(
                 "objectionary",
-                (Objectionary) input -> new InputOf(
-                    "[] > sprintf\n"
-                )
+                new OyFake()
             )
             .execute();
         MatcherAssert.assertThat(
@@ -134,9 +130,7 @@ void assemblesNotFailWithFailOnErrorFlag(@TempDir final Path temp) throws Except
             .with("ignoreTransitive", true)
             .with(
                 "objectionary",
-                (Objectionary) input -> new InputOf(
-                    "[] > sprintf\n"
-                )
+                new OyFake()
             )
             .execute();
         MatcherAssert.assertThat(
@@ -162,4 +156,5 @@ void assemblesNotFailWithFailOnErrorFlag(@TempDir final Path temp) throws Except
             Matchers.is(true)
         );
     }
+
 }

eo-maven-plugin/src/test/java/org/eolang/maven/CleanMojoTest.java

@@ -27,9 +27,7 @@
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
-import org.cactoos.io.InputOf;
 import org.cactoos.set.SetOf;
-import org.eolang.maven.objectionary.Objectionary;
 import org.eolang.maven.util.Home;
 import org.hamcrest.MatcherAssert;
 import org.hamcrest.Matchers;
@@ -92,9 +90,7 @@ void fullCompilingLifecycleSuccessfully(@TempDir final Path temp) throws IOExcep
             .with("ignoreTransitive", true)
             .with(
                 "objectionary",
-                (Objectionary) input -> new InputOf(
-                    "[] > sprintf\n"
-                )
+                new OyFake()
             )
             .execute();
         new Moja<>(CleanMojo.class)

eo-maven-plugin/src/test/java/org/eolang/maven/OyFake.java

@@ -0,0 +1,119 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2016-2022 Objectionary.com
+ *
+ * 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.eolang.maven;
+
+import com.jcabi.log.Logger;
+import org.cactoos.Func;
+import org.cactoos.Input;
+import org.cactoos.io.InputOf;
+import org.eolang.maven.objectionary.Objectionary;
+
+/**
+ * Objectionary with lambda-function Ctor-s for testing.
+ *
+ * @since 0.28.11
+ * @checkstyle IllegalCatchCheck (150 lines)
+ */
+public final class OyFake implements Objectionary {
+
+    /**
+     * Function that emulates 'get()' method in {@link Objectionary}.
+     *
+     * @checkstyle MemberNameCheck (5 lines)
+     */
+    @SuppressWarnings("PMD.AvoidFieldNameMatchingMethodName")
+    private final Func<String, Input> get;
+
+    /**
+     * Function that emulates 'contains()' method in {@link Objectionary}.
+     *
+     * @checkstyle MemberNameCheck (5 lines)
+     */
+    @SuppressWarnings("PMD.AvoidFieldNameMatchingMethodName")
+    private final Func<String, Boolean> contains;
+
+    /**
+     * Ctor.
+     */
+    public OyFake() {
+        this(
+            s -> new InputOf("[] > sprintf\n")
+        );
+    }
+
+    /**
+     * Ctor.
+     *
+     * @param gett Lambda func for get()
+     */
+    public OyFake(final Func<String, Input> gett) {
+        this(
+            gett,
+            s -> true
+        );
+    }
+
+    /**
+     * Ctor.
+     *
+     * @param gett Lambda func for get()
+     * @param cont Lambda func for contains()
+     */
+    public OyFake(final Func<String, Input> gett, final Func<String, Boolean> cont) {
+        this.get = gett;
+        this.contains = cont;
+    }
+
+    @Override
+    public String toString() {
+        return "OyFake";
+    }
+
+    @Override
+    @SuppressWarnings("PMD.AvoidCatchingGenericException")
+    public Input get(final String name) {
+        try {
+            return this.get.apply(name);
+        } catch (final Exception ex) {
+            Logger.debug(
+                this, "Invalid lambda function for get() method in OyFake!"
+            );
+            throw new IllegalArgumentException(ex);
+        }
+    }
+
+    @Override
+    @SuppressWarnings("PMD.AvoidCatchingGenericException")
+    public boolean contains(final String name) {
+        try {
+            return this.contains.apply(name);
+        } catch (final Exception ex) {
+            Logger.debug(
+                this, "Invalid lambda function for contains() method in OyFake!"
+            );
+            throw new IllegalArgumentException(ex);
+        }
+    }
+
+}

eo-maven-plugin/src/test/java/org/eolang/maven/PullMojoTest.java

@@ -28,7 +28,6 @@
 import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.util.LinkedList;
-import org.cactoos.io.InputOf;
 import org.cactoos.io.ResourceOf;
 import org.eolang.maven.objectionary.Objectionary;
 import org.eolang.maven.util.Home;
@@ -135,6 +134,7 @@ void pullsUsingOfflineHash(@TempDir final Path temp) {
      * @return Dummy Objectionary.
      */
     private Objectionary dummy() {
-        return input -> new InputOf("[] > hello\n");
+        return new OyFake();
     }
+
 }

eo-maven-plugin/src/test/java/org/eolang/maven/SkipTest.java

@@ -27,8 +27,6 @@
 import java.io.IOException;
 import java.nio.file.Path;
 import java.nio.file.Paths;
-import org.cactoos.io.InputOf;
-import org.eolang.maven.objectionary.Objectionary;
 import org.eolang.maven.util.Home;
 import org.eolang.maven.util.Online;
 import org.hamcrest.MatcherAssert;
@@ -116,7 +114,7 @@ private void executePullMojo(
             .with("skip", skip)
             .with(
                 "objectionary",
-                (Objectionary) input -> new InputOf("[] > hello\n")
+                new OyFake()
             )
             .execute();
     }

eo-maven-plugin/src/test/java/org/eolang/maven/SnippetTest.java

@@ -44,7 +44,6 @@
 import org.cactoos.list.ListOf;
 import org.cactoos.scalar.LengthOf;
 import org.eolang.jucs.ClasspathSource;
-import org.eolang.maven.objectionary.Objectionary;
 import org.eolang.maven.util.Home;
 import org.eolang.maven.util.Walk;
 import org.hamcrest.MatcherAssert;
@@ -123,7 +122,7 @@ void runsAllSnippets(final String yml) throws Exception {
      * @throws Exception If fails
      * @checkstyle ParameterNumberCheck (5 lines)
      */
-    @SuppressWarnings("unchecked")
+    @SuppressWarnings({"unchecked", "PMD.ExcessiveMethodLength"})
     private static int run(final Path tmp, final Input code, final List<String> args,
         final Input stdin, final Output stdout) throws Exception {
         final Path src = tmp.resolve("src");
@@ -154,11 +153,13 @@ private static int run(final Path tmp, final Input code, final List<String> args
             .with("placed", target.resolve("list").toFile())
             .with(
                 "objectionary",
-                (Objectionary) name -> new InputOf(
-                    home.resolve(
-                        String.format(
-                            "src/main/eo/%s.eo",
-                            name.replace(".", "/")
+                new OyFake(
+                    name -> new InputOf(
+                        home.resolve(
+                            String.format(
+                                "src/main/eo/%s.eo",
+                                name.replace(".", "/")
+                            )
                         )
                     )
                 )