#53 many executions

src/main/java/com/yegor256/farea/Plugin.java

@@ -70,7 +70,10 @@ public Plugin phase(final String value) throws IOException {
                 )
                 .strict(1)
                 .addIf("executions")
-                .addIf("execution")
+                .add("execution")
+                .add("id")
+                .xset("concat('farea-', count(../../execution))")
+                .up()
                 .addIf("phase")
                 .set(value)
         );
@@ -93,8 +96,8 @@ public Plugin goals(final String... values) throws IOException {
             )
             .strict(1)
             .addIf("executions")
-            .addIf("execution")
-            .addIf("goals");
+            .add("execution")
+            .add("goals");
         for (final String goal : values) {
             dirs.add("goal").set(goal).up();
         }

src/test/java/com/yegor256/farea/PluginTest.java

@@ -0,0 +1,54 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2023 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 com.yegor256.farea;
+
+import java.io.IOException;
+import java.nio.file.Path;
+import org.hamcrest.MatcherAssert;
+import org.hamcrest.Matchers;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.io.TempDir;
+
+/**
+ * Test case for {@link Plugin}.
+ *
+ * @since 0.1.0
+ */
+final class PluginTest {
+
+    @Test
+    void appendsManyExecutions(final @TempDir Path dir) throws IOException {
+        final Path xml = dir.resolve("pom.xml");
+        final Pom pom = new Pom(xml).init();
+        final Plugin plugin = new Plugins(pom).append("g", "a", "0.0.1");
+        plugin.phase("first");
+        plugin.phase("second");
+        MatcherAssert.assertThat(
+            "Appends two executions",
+            pom.xpath("/project/build/plugins/plugin/executions/execution/id/text()").size(),
+            Matchers.equalTo(2)
+        );
+    }
+
+}