Allow snippet section titles to be customized using document attributes

Closes gh-363

docs/src/docs/asciidoc/working-with-asciidoctor.adoc

@@ -45,6 +45,58 @@ operation::index[]
 
 
 
+[[working-with-asciidoctor-including-snippets-operation-titles]]
+===== Section titles
+
+For each snippet that's including using `operation` a section with a title will be
+created. Default titles are provided for the built-in snippets:
+
+|===
+| Snippet | Title
+
+| curl-request
+| Curl Request
+
+| http-request
+| HTTP request
+
+| http-response
+| HTTP response
+
+| httpie-request
+| HTTPie request
+
+| links
+| Links
+
+| request-body
+| Request body
+
+| request-fields
+| Request fields
+
+| response-body
+| Response body
+
+| response-fields
+| Response fields
+|===
+
+For snippets not listed in the table above, a default title will be generated by replacing
+`-` characters with spaces and capitalising the first letter. For example, the title for a
+snippet named `custom-snippet` will be "Custom snippet".
+
+The default titles can be customized using document attributes. The name of the attribute
+should be `operation-{snippet}-title`. For example, to customize the title of the
+`curl-request` snippet to be "Example request", use the following attribute:
+
+[source,indent=0]
+----
+:operation-curl-request-title: Example request
+----
+
+
+
 [[working-with-asciidoctor-including-snippets-individual]]
 ==== Including individual snippets
 

spring-restdocs-asciidoctor/src/main/resources/extensions/operation_block_macro.rb

@@ -15,29 +15,32 @@ class OperationBlockMacro < Asciidoctor::Extensions::BlockMacroProcessor
   def process(parent, operation, attributes)
     snippets_dir = parent.document.attributes['snippets'].to_s
     snippet_names = attributes.fetch 'snippets', ''
-    content = read_snippets(snippets_dir, snippet_names, parent, operation)
+    snippet_titles = SnippetTitles.new parent.document.attributes
+    content = read_snippets(snippets_dir, snippet_names, parent, operation,
+                            snippet_titles)
     add_blocks(content, parent.document, parent) unless content.empty?
     nil
   end
 
-  def read_snippets(snippets_dir, snippet_names, parent, operation)
+  def read_snippets(snippets_dir, snippet_names, parent, operation,
+                    snippet_titles)
     snippets = snippets_to_include(snippet_names, snippets_dir, operation)
     if snippets.empty?
       warn "No snippets were found for operation #{operation} in"\
            "#{snippets_dir}"
       "No snippets found for operation::#{operation}"
     else
-      do_read_snippets(snippets, parent, operation)
+      do_read_snippets(snippets, parent, operation, snippet_titles)
     end
   end
 
-  def do_read_snippets(snippets, parent, operation)
+  def do_read_snippets(snippets, parent, operation, snippet_titles)
     content = StringIO.new
     section_level = parent.level + 1
     section_id = parent.id
     snippets.each do |snippet|
       append_snippet_block(content, snippet, section_level, section_id,
-                           operation)
+                           operation, snippet_titles)
     end
     content.string
   end
@@ -59,7 +62,7 @@ class OperationBlockMacro < Asciidoctor::Extensions::BlockMacroProcessor
     else
       snippet_names.split(',').map do |name|
         path = File.join snippets_dir, operation, "#{name}.adoc"
-        Snippet.new(path, name)
+        Snippet.new path, name
       end
     end
   end
@@ -74,8 +77,8 @@ class OperationBlockMacro < Asciidoctor::Extensions::BlockMacroProcessor
   end
 
   def append_snippet_block(content, snippet, section_level, section_id,
-                           operation)
-    write_title content, snippet, section_level, section_id
+                           operation, snippet_titles)
+    write_title content, snippet, section_level, section_id, snippet_titles
     write_content content, snippet, operation
   end
 
@@ -91,38 +94,49 @@ class OperationBlockMacro < Asciidoctor::Extensions::BlockMacroProcessor
     end
   end
 
-  def write_title(content, snippet, level, id)
+  def write_title(content, snippet, level, id, snippet_titles)
     section_level = '=' * (level + 1)
+    title = snippet_titles.title_for_snippet snippet
     content.puts "[[#{id}_#{snippet.name.sub '-', '_'}]]"
-    content.puts "#{section_level} #{snippet.title}"
+    content.puts "#{section_level} #{title}"
     content.puts ''
   end
 
   # Details of a snippet to be rendered
   class Snippet
-    @titles = { 'http-request' => 'HTTP request',
-                'curl-request' => 'Curl request',
-                'httpie-request' => 'HTTPie request',
-                'request-body' => 'Request body',
-                'request-fields' => 'Request fields',
-                'http-response' => 'HTTP response',
-                'response-body' => 'Response body',
-                'response-fields' => 'Response fields',
-                'links' => 'Links' }
-
-    class << self
-      attr_reader :titles
-    end
-
     attr_reader :name, :path
 
     def initialize(path, name)
       @path = path
       @name = name
+      @snippet_titles
+    end
+  end
+
+  class SnippetTitles
+    @defaults = { 'http-request' => 'HTTP request',
+                  'curl-request' => 'Curl request',
+                  'httpie-request' => 'HTTPie request',
+                  'request-body' => 'Request body',
+                  'request-fields' => 'Request fields',
+                  'http-response' => 'HTTP response',
+                  'response-body' => 'Response body',
+                  'response-fields' => 'Response fields',
+                  'links' => 'Links' }
+
+    class << self
+      attr_reader :defaults
     end
 
-    def title
-      Snippet.titles.fetch @name, name.sub('-', ' ').capitalize
+    def initialize(document_attributes)
+      @document_attributes = document_attributes
+    end
+
+    def title_for_snippet(snippet)
+      attribute_name = "operation-#{snippet.name}-title"
+      @document_attributes.fetch attribute_name do
+        SnippetTitles.defaults.fetch snippet.name, snippet.name.sub('-', ' ').capitalize
+      end
     end
   end
 end

spring-restdocs-asciidoctor/src/test/java/org/springframework/restdocs/asciidoctor/OperationBlockMacroTests.java

@@ -32,7 +32,6 @@ import org.junit.Test;
 
 import org.springframework.util.FileSystemUtils;
 
-import static org.hamcrest.CoreMatchers.containsString;
 import static org.hamcrest.CoreMatchers.equalTo;
 import static org.hamcrest.CoreMatchers.startsWith;
 import static org.junit.Assert.assertThat;
@@ -62,12 +61,6 @@ public class OperationBlockMacroTests {
 		this.options.setAttributes(getAttributes());
 	}
 
-	private Attributes getAttributes() {
-		Attributes attributes = new Attributes();
-		attributes.setAttribute("projectdir", new File(".").getAbsolutePath());
-		return attributes;
-	}
-
 	@Test
 	public void simpleSnippetInclude() throws Exception {
 		String result = this.asciidoctor.convert(
@@ -106,27 +99,49 @@ public class OperationBlockMacroTests {
 	}
 
 	@Test
-	public void includingUnknownSnippetAddsWarning() throws Exception {
+	public void includingMissingSnippetAddsWarning() throws Exception {
 		String result = this.asciidoctor.convert(
-				"operation::some-operation[snippets='unknown-snippet']", this.options);
+				"operation::some-operation[snippets='missing-snippet']", this.options);
 		assertThat(result, startsWith(getExpectedContentFromFile("missing-snippet")));
 	}
 
 	@Test
-	public void includingCustomSnippetCreatesCustomTitle() throws Exception {
+	public void defaultTitleIsProvidedForCustomSnippet() throws Exception {
 		String result = this.asciidoctor.convert(
 				"operation::some-operation[snippets='custom-snippet']", this.options);
 		assertThat(result,
-				containsString(getExpectedContentFromFile("snippet-custom-title")));
+				equalTo(getExpectedContentFromFile("custom-snippet-default-title")));
 	}
 
 	@Test
-	public void nonExistentOperationIsHandledGracefully() throws Exception {
-		String result = this.asciidoctor.convert("operation::non-existent-operation[]",
+	public void missingOperationIsHandledGracefully() throws Exception {
+		String result = this.asciidoctor.convert("operation::missing-operation[]",
 				this.options);
 		assertThat(result, startsWith(getExpectedContentFromFile("missing-operation")));
 	}
 
+	@Test
+	public void titleOfBuiltInSnippetCanBeCustomizedUsingDocumentAttribute()
+			throws URISyntaxException, IOException {
+		String result = this.asciidoctor.convert(
+				":operation-curl-request-title: Example request\n"
+						+ "operation::some-operation[snippets='curl-request']",
+				this.options);
+		assertThat(result,
+				equalTo(getExpectedContentFromFile("built-in-snippet-custom-title")));
+	}
+
+	@Test
+	public void titleOfCustomSnippetCanBeCustomizedUsingDocumentAttribute()
+			throws Exception {
+		String result = this.asciidoctor.convert(
+				":operation-custom-snippet-title: Customized title\n"
+						+ "operation::some-operation[snippets='custom-snippet']",
+				this.options);
+		assertThat(result,
+				equalTo(getExpectedContentFromFile("custom-snippet-custom-title")));
+	}
+
 	private String getExpectedContentFromFile(String fileName)
 			throws URISyntaxException, IOException {
 		Path filePath = Paths.get(
@@ -142,4 +157,10 @@ public class OperationBlockMacroTests {
 		return File.separatorChar == '\\';
 	}
 
+	private Attributes getAttributes() {
+		Attributes attributes = new Attributes();
+		attributes.setAttribute("projectdir", new File(".").getAbsolutePath());
+		return attributes;
+	}
+
 }

spring-restdocs-asciidoctor/src/test/resources/operations/built-in-snippet-custom-title.html

@@ -0,0 +1,10 @@
+<div class="sect1">
+<h2 id="_curl_request">Example request</h2>
+<div class="sectionbody">
+<div class="listingblock">
+<div class="content">
+<pre class="highlight"><code class="language-bash" data-lang="bash">$ curl 'http://localhost:8080/' -i</code></pre>
+</div>
+</div>
+</div>
+</div>

spring-restdocs-asciidoctor/src/test/resources/operations/custom-snippet-custom-title.html

@@ -0,0 +1,10 @@
+<div class="sect1">
+<h2 id="_custom_snippet">Customized title</h2>
+<div class="sectionbody">
+<div class="listingblock">
+<div class="content">
+<pre class="highlight nowrap"><code class="language-http" data-lang="http">mycustomsnippet</code></pre>
+</div>
+</div>
+</div>
+</div>

spring-restdocs-asciidoctor/src/test/resources/operations/custom-snippet-default-title.html

@@ -0,0 +1,10 @@
+<div class="sect1">
+<h2 id="_custom_snippet">Custom snippet</h2>
+<div class="sectionbody">
+<div class="listingblock">
+<div class="content">
+<pre class="highlight nowrap"><code class="language-http" data-lang="http">mycustomsnippet</code></pre>
+</div>
+</div>
+</div>
+</div>

spring-restdocs-asciidoctor/src/test/resources/operations/missing-operation.html

@@ -1,3 +1,3 @@
 <div class="paragraph">
-<p>No snippets found for operation::non-existent-operation</p>
+<p>No snippets found for operation::missing-operation</p>
 </div>

spring-restdocs-asciidoctor/src/test/resources/operations/missing-snippet.html

@@ -1,8 +1,8 @@
 <div class="sect1">
-<h2 id="_unknown_snippet">Unknown snippet</h2>
+<h2 id="_missing_snippet">Missing snippet</h2>
 <div class="sectionbody">
 <div class="paragraph">
-<p>Snippet unknown-snippet not found for operation::some-operation</p>
+<p>Snippet missing-snippet not found for operation::some-operation</p>
 </div>
 </div>
 </div>

spring-restdocs-asciidoctor/src/test/resources/operations/snippet-custom-title.html

@@ -1 +0,0 @@
-<h2 id="_custom_snippet">Custom snippet</h2>