Fix archive summary text.

lib/archive-editor-view.js

@@ -107,10 +107,10 @@ export default class ArchiveEditorView {
   }
 
   updateSummary () {
-    const fileCount = this.entries.filter((entry) => entry instanceof FileView)
+    const fileCount = this.entries.filter((entry) => entry instanceof FileView).length
     const fileLabel = fileCount === 1 ? '1 file' : `${humanize.intComma(fileCount)} files`
 
-    const directoryCount = this.entries.filter((entry) => entry instanceof DirectoryView)
+    const directoryCount = this.entries.filter((entry) => entry instanceof DirectoryView).length
     const directoryLabel = directoryCount === 1 ? '1 folder' : `${humanize.intComma(directoryCount)} folders`
 
     this.refs.summary.style.display = ''

spec/archive-editor-view-spec.coffee

@@ -47,6 +47,21 @@ describe "Archive viewer", ->
       waitsFor -> archiveEditor.element.querySelectorAll('.entry').length > 0
       runs -> expect(archiveEditor.element.querySelector('.selected').textContent).toBe 'f1.txt'
 
+  describe "archive summary", ->
+    beforeEach ->
+      waitsForPromise ->
+        atom.workspace.open('multiple-entries.zip')
+
+      runs ->
+        archiveEditor = atom.workspace.getActivePaneItem()
+        jasmine.attachToDOM(atom.views.getView(atom.workspace))
+
+    it "shows correct archive summary", ->
+      waitsFor -> archiveEditor.element.querySelectorAll('.entry').length > 0
+
+      runs ->
+        expect(archiveEditor.element.querySelector('.inset-panel .panel-heading').textContent).toBe '704 bytes with 4 files and 1 folder'
+
   describe "when core:move-up/core:move-down is triggered", ->
     it "selects the next/previous file", ->
       waitsFor ->