test(yaml): test handling of omap (denoland#4851)

familyboat · May 24, 2024 · 2a6e912 · 2a6e912
1 parent 5d7cb3c
commit 2a6e912
Show file tree

Hide file tree

Showing 2 changed files with 42 additions and 5 deletions.
diff --git a/yaml/_type/omap.ts b/yaml/_type/omap.ts
@@ -35,12 +35,7 @@ function resolveYamlOmap(data: Any): boolean {
   return true;
 }
 
-function constructYamlOmap(data: Any): Any {
-  return data !== null ? data : [];
-}
-
 export const omap = new Type("tag:yaml.org,2002:omap", {
-  construct: constructYamlOmap,
   kind: "sequence",
   resolve: resolveYamlOmap,
 });
diff --git a/yaml/parse_test.ts b/yaml/parse_test.ts
@@ -271,3 +271,45 @@ Deno.test({
     ]);
   },
 });
+
+Deno.test({
+  name: "parse() handles omap type",
+  fn() {
+    const yaml = `--- !!omap
+- Mark McGwire: 65
+- Sammy Sosa: 63
+- Ken Griffey: 58
+`;
+    assertEquals(parse(yaml), [
+      { "Mark McGwire": 65 },
+      { "Sammy Sosa": 63 },
+      { "Ken Griffey": 58 },
+    ]);
+
+    // Invalid omap
+    // map entry is not an object
+    assertThrows(
+      () => parse("--- !!omap\n- 1"),
+      YAMLError,
+      "cannot resolve a node with !<tag:yaml.org,2002:omap> explicit tag",
+    );
+    // map entry is empty object
+    assertThrows(
+      () => parse("--- !!omap\n- {}"),
+      YAMLError,
+      "cannot resolve a node with !<tag:yaml.org,2002:omap> explicit tag",
+    );
+    // map entry is an object with multiple keys
+    assertThrows(
+      () => parse("--- !!omap\n- foo: 1\n  bar: 2"),
+      YAMLError,
+      "cannot resolve a node with !<tag:yaml.org,2002:omap> explicit tag",
+    );
+    // 2 map entries have the same key
+    assertThrows(
+      () => parse("--- !!omap\n- foo: 1\n- foo: 2"),
+      YAMLError,
+      "cannot resolve a node with !<tag:yaml.org,2002:omap> explicit tag",
+    );
+  },
+});