Fizzbuzz sample for closures

muscript/src/test/java/io/gitlab/jfronny/muscript/test/ClosureTest.java

@@ -1,15 +1,21 @@
 package io.gitlab.jfronny.muscript.test;
 
 import io.gitlab.jfronny.muscript.compiler.Parser;
-import org.junit.jupiter.api.*;
+import io.gitlab.jfronny.muscript.data.Scope;
+import io.gitlab.jfronny.muscript.data.dynamic.DFinal;
+import org.junit.jupiter.api.Test;
 
-import static io.gitlab.jfronny.muscript.test.util.MuTestUtil.*;
-import static org.junit.jupiter.api.Assertions.*;
+import static io.gitlab.jfronny.muscript.test.util.MuTestUtil.makeArgs;
+import static io.gitlab.jfronny.muscript.test.util.MuTestUtil.number;
+import static org.junit.jupiter.api.Assertions.assertEquals;
 
 class ClosureTest {
     @Test
     void testScript() {
-        assertEquals(8, Parser.parseScript("function(2, 1) function(2, 2) function(2, 3)").run(makeArgs()).asNumber().getValue());
+        assertEquals(8, Parser.parseScript("function(2, 1) function(2, 2) function(2, 3)")
+                .run(makeArgs())
+                .asNumber()
+                .getValue());
     }
 
     @Test
@@ -20,4 +26,23 @@ class ClosureTest {
         assertEquals(2, number("{->num = 2 num = num * 2 num = num - 2}()"));
         assertEquals(2, number("{->num = 2; num = num * 2; num = num - 2}()"));
     }
+
+    @Test
+    void fizzbuzzInμScriptByEmbeddingADomainSpecificLanguage() {
+        var fn = Parser.parse("""
+                { n ->
+                    test = { b, s, o -> n % b == 0 ? { _ -> s || o('')} : o }
+                    fizz = { o -> test(3, 'Fizz', o) }
+                    buzz = { o -> test(5, 'Buzz', o) }
+                    fizz(buzz({n -> n}))(n)
+                }
+                """)
+                .asDynamicExpr()
+                .get(new Scope())
+                .asCallable();
+        assertEquals("8", fn.call(DFinal.of(8)).asString().getValue());
+        assertEquals("Buzz", fn.call(DFinal.of(10)).asString().getValue());
+        assertEquals("Fizz", fn.call(DFinal.of(12)).asString().getValue());
+        assertEquals("FizzBuzz", fn.call(DFinal.of(15)).asString().getValue());
+    }
 }