feat: support peerDependenciesMeta field (#142)

index.js

@@ -15,7 +15,19 @@ const uniqAndSortArray = pipe([uniq, sortArray])
 const isPlainObject = x =>
   x && Object.prototype.toString.call(x) === '[object Object]'
 const onObject = fn => x => (isPlainObject(x) ? fn(x) : x)
-const sortObjectBy = comparator => onObject(x => sortObjectKeys(x, comparator))
+const sortObjectBy = (comparator, deep) => {
+  const over = onObject(object => {
+    object = sortObjectKeys(object, comparator)
+    if (deep) {
+      for (const [key, value] of Object.entries(object)) {
+        object[key] = over(value)
+      }
+    }
+    return object
+  })
+
+  return over
+}
 const sortObject = sortObjectBy()
 const sortURLObject = sortObjectBy(['type', 'url'])
 const sortPeopleObject = sortObjectBy(['name', 'email', 'url'])
@@ -227,6 +239,8 @@ const fields = [
   { key: 'dependencies', over: sortObject },
   { key: 'devDependencies', over: sortObject },
   { key: 'peerDependencies', over: sortObject },
+  // TODO: only sort depth = 2
+  { key: 'peerDependenciesMeta', over: sortObjectBy(undefined, true) },
   { key: 'optionalDependencies', over: sortObject },
   { key: 'bundledDependencies', over: uniqAndSortArray },
   { key: 'bundleDependencies', over: uniqAndSortArray },

tests/_helpers.js

@@ -27,19 +27,34 @@ const sortPackageJsonAsObject = ({ path, value, options }) =>
     path,
   )
 
-const keysToObject = keys => {
+const keysToObject = (keys, depth = 1) => {
   if (keys.some((value, index) => keys.indexOf(value) !== index)) {
     throw new Error(`${keys} should be unique.`)
   }
-  return keys.reduce((object, key) => Object.assign(object, { [key]: key }), {})
+
+  if (depth < 1) {
+    throw new Error(`depth should be a positive integer, got ${depth}.`)
+  }
+
+  return keys.reduce(
+    (object, key) =>
+      Object.assign(object, {
+        [key]: depth > 1 ? keysToObject(keys, depth - 1) : key,
+      }),
+    {},
+  )
 }
 
-function sortObjectAlphabetically(t, options) {
-  sortObject(t, {
-    ...options,
-    value: keysToObject(['z', 'a']),
-    expect: keysToObject(['a', 'z']),
-  })
+function sortObjectAlphabetically(t, options = {}) {
+  const { maxDepth = 1, expect } = options
+
+  for (let depth = 1; depth < maxDepth + 1; depth++) {
+    sortObject(t, {
+      ...options,
+      value: keysToObject(['z', 'a'], depth),
+      expect: expect || keysToObject(['a', 'z'], depth),
+    })
+  }
 }
 
 function sortObject(

tests/deps.js

@@ -21,3 +21,11 @@ for (const field of [
 ]) {
   test(field, macro.uniqueAndSort, { path: field })
 }
+
+// peerDependenciesMeta
+test('peerDependenciesMeta', macro.sortObjectAlphabetically, {
+  path: 'peerDependenciesMeta',
+  maxDepth: 2,
+  // TODO: don't use snapshot, find a esaier way for review
+  expect: 'snapshot',
+})

tests/snapshots/deps.js.md

@@ -0,0 +1,57 @@
+# Snapshot report for `tests/deps.js`
+
+The actual snapshot is saved in `deps.js.snap`.
+
+Generated by [AVA](https://ava.li).
+
+## peerDependenciesMeta
+
+> Should sort `peerDependenciesMeta` as object.
+
+    {
+      input: `{␊
+        "peerDependenciesMeta": {␊
+          "z": "z",␊
+          "a": "a"␊
+        }␊
+      }`,
+      options: undefined,
+      output: `{␊
+        "peerDependenciesMeta": {␊
+          "a": "a",␊
+          "z": "z"␊
+        }␊
+      }`,
+      pretty: true,
+    }
+
+> Should sort `peerDependenciesMeta` as object.
+
+    {
+      input: `{␊
+        "peerDependenciesMeta": {␊
+          "z": {␊
+            "z": "z",␊
+            "a": "a"␊
+          },␊
+          "a": {␊
+            "z": "z",␊
+            "a": "a"␊
+          }␊
+        }␊
+      }`,
+      options: undefined,
+      output: `{␊
+        "peerDependenciesMeta": {␊
+          "a": {␊
+            "a": "a",␊
+            "z": "z"␊
+          },␊
+          "z": {␊
+            "a": "a",␊
+            "z": "z"␊
+          }␊
+        }␊
+      }`,
+      pretty: true,
+    }

tests/snapshots/main.js.md

@@ -69,6 +69,7 @@ Generated by [AVA](https://ava.li).
         "optionalDependencies": "optionalDependencies",␊
         "os": "os",␊
         "peerDependencies": "peerDependencies",␊
+        "peerDependenciesMeta": "peerDependenciesMeta",␊
         "pre-commit": "pre-commit",␊
         "preferGlobal": "preferGlobal",␊
         "prettier": "prettier",␊
@@ -160,6 +161,7 @@ Generated by [AVA](https://ava.li).
         "dependencies": "dependencies",␊
         "devDependencies": "devDependencies",␊
         "peerDependencies": "peerDependencies",␊
+        "peerDependenciesMeta": "peerDependenciesMeta",␊
         "optionalDependencies": "optionalDependencies",␊
         "bundledDependencies": "bundledDependencies",␊
         "bundleDependencies": "bundleDependencies",␊