fix: unmet label on deduped deps

Author: ruyadorno

lib/ls.js

@@ -263,6 +263,7 @@ const augmentNodesWithMetadata = ({
       pkgid: node.pkgid,
       package: node.package,
       path: node.path,
+      [_missing]: node[_missing],
       [_dedupe]: true
     }
   } else {

tap-snapshots/test-lib-ls.js-TAP.test.js

@@ -336,6 +336,14 @@ [email protected] {CWD}/ls-ls-cycle-deps
 
 `
 
+exports[`test/lib/ls.js TAP ls deduped missing dep > should output parseable signaling missing peer dep in problems 1`] = `
+[email protected] {CWD}/ls-ls-deduped-missing-dep
++-- [email protected]
+| \`-- UNMET DEPENDENCY b@^1.0.0 deduped
+\`-- UNMET DEPENDENCY b@^1.0.0
+
+`
+
 exports[`test/lib/ls.js TAP ls default --depth value should be 0 > should output tree containing only top-level dependencies 1`] = `
 [email protected] {CWD}/ls-ls-default-depth-value-should-be-0
 +-- [email protected]

test/lib/ls.js

@@ -719,6 +719,36 @@ test('ls', (t) => {
     })
   })
 
+  t.test('deduped missing dep', (t) => {
+    prefix = t.testdir({
+      'package.json': JSON.stringify({
+        name: 'test-npm-ls',
+        version: '1.0.0',
+        dependencies: {
+          'a': '^1.0.0',
+          'b': '^1.0.0'
+        }
+      }),
+      node_modules: {
+        a: {
+          'package.json': JSON.stringify({
+            name: 'a',
+            version: '1.0.0',
+            dependencies: {
+              b: '^1.0.0'
+            }
+          })
+        }
+      }
+    })
+    ls([], (err) => {
+      t.match(err.code, 'ELSPROBLEMS', 'should have ELSPROBLEMS error code')
+      t.match(err.message, /missing: b@\^1.0.0/, 'should list missing dep problem')
+      t.matchSnapshot(redactCwd(result), 'should output parseable signaling missing peer dep in problems')
+      t.end()
+    })
+  })
+
   t.test('unmet peer dep', (t) => {
     prefix = t.testdir({
       'package.json': JSON.stringify({