Add test for ListItem attributedText (#33)

I wanted to add a test that displays the current behavior. This
is either the desired behavior, or maybe the desired behavior is
different, and this test can be modified to describe the desired behavior.

Tests/MaakuTests/Core/Container/ListItemSpec.swift

@@ -13,6 +13,7 @@ import XCTest
 
 class ListItemSpec: QuickSpec {
 
+    // swiftlint:disable function_body_length
     override func spec() {
 
         describe("ListItem") {
@@ -31,7 +32,7 @@ class ListItemSpec: QuickSpec {
 
                 it("parses the list items") {
                     expect(document[0]).to(beAKindOf(UnorderedList.self))
-                    // swiftlint:disable force_cast
+                    // swiftlint:disable:next force_cast
                     let list = document[0] as! UnorderedList
                     expect(list.items.count).to(equal(3))
 
@@ -45,6 +46,89 @@ class ListItemSpec: QuickSpec {
                 }
             }
         }
+        describe("ListItem.attributedText") {
+            let text =
+"""
+- list 1
+  a paragraph inside list one, followed by:
+  - embedded list
+  - another embedded item
+    1. ordered list inside
+    1. another ordered item
+  - third embedded item
+- second item in top list
+"""
+/* XML for above for comparison of the structure:
+<document xmlns="http://commonmark.org/xml/1.0">
+    <list type="bullet" tight="true">
+        <item>
+            <paragraph>
+                <text xml:space="preserve">list 1</text>
+                <softbreak />
+                <text xml:space="preserve">a paragraph inside list one, followed by:</text>
+            </paragraph>
+            <list type="bullet" tight="true">
+                <item>
+                    <paragraph>
+                        <text xml:space="preserve">embedded list</text>
+                    </paragraph>
+                </item>
+                <item>
+                    <paragraph>
+                        <text xml:space="preserve">another embedded item</text>
+                    </paragraph>
+                    <list type="ordered" start="1" delim="period" tight="true">
+                        <item>
+                            <paragraph>
+                                <text xml:space="preserve">ordered list inside</text>
+                            </paragraph>
+                        </item>
+                        <item>
+                            <paragraph>
+                                <text xml:space="preserve">another ordered item</text>
+                            </paragraph>
+                        </item>
+                    </list>
+                </item>
+                <item>
+                    <paragraph>
+                        <text xml:space="preserve">third embedded item</text>
+                    </paragraph>
+                </item>
+            </list>
+        </item>
+        <item>
+            <paragraph>
+                <text xml:space="preserve">second item in top list</text>
+            </paragraph>
+        </item>
+    </list>
+</document>
+
+ */
+            // We expect that the attributed text for the first item includes all the sub-lists that are included
+            // under the item, not just the first line ("list 1") or even just the first line and the following
+            // paragraph, but *all* the stuff inside this list item.
+            // swiftlint:disable:next line_length
+            let expectedFirstString = "list 1 a paragraph inside list one, followed by:• embedded list• another embedded item1. ordered list inside2. another ordered item• third embedded item"
+
+            do {
+                let document = try Document(text: text)
+                let style = DefaultStyle()
+
+                it("checks the attributedText values") {
+                    // swiftlint:disable:next force_cast
+                    let list = document[0] as! UnorderedList
+                    let firstItemText = list.items[0].attributedText(style: style)
+                    expect(firstItemText.string).to(equal(expectedFirstString))
+                }
+            } catch let error {
+                it("fails to initialize the document") {
+                    fail("\(error.localizedDescription)")
+                }
+            }
+
+        }
     }
 
 }