Update YamlTest.java (#1041)

Add tests from the [YAML Merge Key Draft](https://yaml.org/type/merge.html)
onthegomap · Sep 28, 2024 · 086e284 · 086e284
1 parent d36dad3
commit 086e284
Showing 1 changed file with 70 additions and 0 deletions.
diff --git a/planetiler-core/src/test/java/com/onthegomap/planetiler/util/YamlTest.java b/planetiler-core/src/test/java/com/onthegomap/planetiler/util/YamlTest.java
@@ -164,6 +164,76 @@ void testMergeOperatorSecond() {
       """);
   }
 
+  @Test
+  void testMergeOperatorFromDraft1() {
+    assertSameYaml("""
+      - { x: 1, y: 2 }
+      - { x: 0, y: 2 }
+      - { r: 10 }
+      - { r: 1 }
+      - # Explicit keys
+        x: 1
+        y: 2
+        r: 10
+        label: center/big
+      """, """
+      - &CENTER { x: 1, y: 2 }
+      - &LEFT { x: 0, y: 2 }
+      - &BIG { r: 10 }
+      - &SMALL { r: 1 }
+      - # Merge one map
+	      << : *CENTER
+	      r: 10
+	      label: center/big
+      """);
+
+  @Test
+  void testMergeOperatorFromDraft2() {
+    assertSameYaml("""
+      - { x: 1, y: 2 }
+      - { x: 0, y: 2 }
+      - { r: 10 }
+      - { r: 1 }
+      - # Explicit keys
+        x: 1
+        y: 2
+        r: 10
+        label: center/big
+      """, """
+      - &CENTER { x: 1, y: 2 }
+      - &LEFT { x: 0, y: 2 }
+      - &BIG { r: 10 }
+      - &SMALL { r: 1 }
+      - # Merge multiple maps
+        << : [ *CENTER, *BIG ]
+        label: center/big
+      """);
+  }
+
+  @Test
+  void testMergeOperatorFromDraft3() {
+    assertSameYaml("""
+      - { x: 1, y: 2 }
+      - { x: 0, y: 2 }
+      - { r: 10 }
+      - { r: 1 }
+      - # Explicit keys
+        x: 1
+        y: 2
+        r: 10
+        label: center/big
+      """, """
+      - &CENTER { x: 1, y: 2 }
+      - &LEFT { x: 0, y: 2 }
+      - &BIG { r: 10 }
+      - &SMALL { r: 1 }
+      - # Override
+        << : [ *BIG, *LEFT, *SMALL ]
+        x: 1
+        label: center/big
+      """);
+  }
+
   private static void assertSameYaml(String a, String b) {
     assertEquals(
       YAML.load(b, Object.class),