add a test to check that resources are copied

Closes #758
Closes #757

LGTM given by: @devoncarew, @sethladd

Squashed commit of the following:

commit f0a8f8f
Author: Seth Ladd <[email protected]>
Date:   Mon Aug 3 10:26:20 2015 -0700

    more exact matcher

commit 38aca6e
Author: Seth Ladd <[email protected]>
Date:   Mon Aug 3 10:09:09 2015 -0700

    add a test to check that resources are copied

Author: sethladd

lib/src/html_generator.dart

@@ -124,9 +124,12 @@ class Templates {
 }
 
 class HtmlGenerator extends Generator {
+  /// Optional URL for where the docs will be hosted.
   final String url;
   final Templates _templates;
 
+  /// [url] can be null.
+  // TODO: make url an optional parameter
   HtmlGenerator(this.url, {String header, String footer})
       : _templates = new Templates(header, footer);
 
@@ -149,6 +152,19 @@ class HtmlGeneratorInstance {
   Future generate() async {
     await _templates.init();
     if (!out.existsSync()) out.createSync();
+
+    if (package != null) {
+      _generateDocs();
+    }
+
+    //if (url != null) generateSiteMap();
+
+    await _copyResources();
+  }
+
+  void _generateDocs() {
+    if (package == null) return;
+
     generatePackage();
 
     package.libraries.forEach((Library lib) {
@@ -206,10 +222,6 @@ class HtmlGeneratorInstance {
         generateTypeDef(package, lib, typeDef);
       });
     });
-
-    //if (url != null) generateSiteMap();
-
-    await _copyResources();
   }
 
   void generatePackage() {

test/html_generator_test.dart

@@ -4,8 +4,10 @@
 
 library dartdoc.html_generator_test;
 
-import 'package:test/test.dart';
+import 'dart:io' show File, Directory, FileSystemEntity, FileSystemEntityType;
 
+import 'package:path/path.dart' as p;
+import 'package:test/test.dart';
 import 'package:dartdoc/src/html_generator.dart';
 
 void main() {
@@ -66,6 +68,54 @@ void main() {
 
   group('HtmlGenerator', () {
     // TODO: Run the HtmlGenerator and validate important constraints.
-
+    group('for a null package', () {
+      HtmlGenerator generator;
+      Directory tempOutput;
+
+      setUp(() async {
+        generator = new HtmlGenerator(null);
+        tempOutput = Directory.systemTemp.createTempSync('doc_test_temp');
+        return generator.generate(null, tempOutput);
+      });
+
+      tearDown(() {
+        if (tempOutput != null) {
+          tempOutput.deleteSync(recursive: true);
+        }
+      });
+
+      test('resources are put into the right place', () {
+        Directory output =
+            new Directory(p.join(tempOutput.path, 'static-assets'));
+        expect(output, doesExist);
+        new Directory(p.join('lib', 'resources'))
+            .listSync(recursive: true)
+            .forEach((FileSystemEntity f) {
+          if (f.statSync().type == FileSystemEntityType.FILE) {
+            String subPath =
+                f.path.substring(p.join('lib', 'resources').length + 1);
+            expect(new File(p.join(output.path, subPath)), doesExist);
+          }
+        });
+      });
+    });
   });
 }
+
+const Matcher doesExist = const _DoesExist();
+
+class _DoesExist extends Matcher {
+  const _DoesExist();
+  bool matches(item, Map matchState) => item.existsSync();
+  Description describe(Description description) => description.add('exists');
+  Description describeMismatch(
+      item, Description mismatchDescription, Map matchState, bool verbose) {
+    if (item is! File && item is! Directory) {
+      return mismatchDescription
+          .addDescriptionOf(item)
+          .add('is not a file or directory');
+    } else {
+      return mismatchDescription.add(' does not exist');
+    }
+  }
+}