frontend: Distinguish between empty and null features

Show different page for empty feature flags and
null feature flags.

Author: almusil

src/test/fakes.rs

@@ -210,12 +210,8 @@ impl<'a> FakeRelease<'a> {
         self
     }
 
-    pub(crate) fn features(mut self, opt_features: Option<HashMap<String, Vec<String>>>) -> Self {
-        if let Some(features) = opt_features {
-            self.package.features = features;
-        } else {
-            self.package.features = HashMap::new();
-        }
+    pub(crate) fn features(mut self, features: HashMap<String, Vec<String>>) -> Self {
+        self.package.features = features;
         self
     }
 

src/web/crate_details.rs

@@ -751,8 +751,7 @@ mod tests {
             env.fake_release()
                 .name("library")
                 .version("0.1.0")
-                .binary(false)
-                .features(None)
+                .features(HashMap::new())
                 .create()?;
 
             let page = kuchiki::parse_html().one(
@@ -776,8 +775,7 @@ mod tests {
             env.fake_release()
                 .name("library")
                 .version("0.1.0")
-                .binary(false)
-                .features(Some(features))
+                .features(features)
                 .create()?;
 
             let page = kuchiki::parse_html().one(
@@ -801,8 +799,7 @@ mod tests {
             env.fake_release()
                 .name("library")
                 .version("0.1.0")
-                .binary(false)
-                .features(Some(features))
+                .features(features)
                 .create()?;
 
             let page = kuchiki::parse_html().one(
@@ -819,4 +816,29 @@ mod tests {
             Ok(())
         });
     }
+
+    #[test]
+    fn feature_flags_report_null() {
+        wrapper(|env| {
+            env.fake_release()
+                .name("library")
+                .version("0.1.0")
+                .features(HashMap::new())
+                .create()?;
+
+            env.db().conn().query(
+                "releases SET features = NULL WHERE release_id = $1",
+                &[&"0.1.0"],
+            );
+
+            let page = kuchiki::parse_html().one(
+                env.frontend()
+                    .get("/crate/library/0.1.0/features")
+                    .send()?
+                    .text()?,
+            );
+            assert!(page.select_first(r#"p[data-id="null-features"]"#).is_ok());
+            Ok(())
+        });
+    }
 }

templates/crate/features.html

@@ -34,9 +34,13 @@
                                     </a>
                                 </li>
                             {%- endfor -%}
+                        {%- elif metadata.features is defined -%}
+                            <li class="pure-menu-item">
+                                <span style="font-size: 13px;">This release does not have any feature flags.</span>
+                            </li>
                         {%- else -%}
                             <li class="pure-menu-item">
-                                <span style="font-size: 13px;">Feature flags are not available for this version.</span>
+                                <span style="font-size: 13px;">Feature flags data are not available for this release.</span>
                             </li>
                         {%- endif -%}
                     </ul>
@@ -52,7 +56,7 @@ <h1>{{ metadata.name }}</h1>
                         {%- else -%}
                             0
                         {%- endif -%}
-                    </b> of them being enabled by <b>default</b>.</p>
+                    </b> of them enabled by <b>default</b>.</p>
                     {%- for feature in metadata.features -%}
                         <h3 id="{{ feature.name }}">{{ feature.name }}</h3>
                         <ul class="pure-menu-list">
@@ -67,8 +71,10 @@ <h3 id="{{ feature.name }}">{{ feature.name }}</h3>
                             {%- endif -%}
                         </ul>
                     {%- endfor -%}
+                {%- elif metadata.features is defined  -%}
+                    <p data-id="empty-features">This release does not have any feature flags.</p>
                 {%- else -%}
-                    <p data-id="empty-features">Feature flags are not available for this release.</p>
+                    <p data-id="null-features">Feature flags data are not available for this release.</p>
                 {%- endif -%}
             </div>
         </div>