DEV: Refactor user search spec to use prefabrication

Break up single large example into multiple examples, using fab! to maintain performance. On my machine, this speeds up the test slightly, and also makes it more readable.

spec/models/user_search_spec.rb

@@ -4,24 +4,23 @@ require 'rails_helper'
 
 describe UserSearch do
 
-  let(:topic)     { Fabricate :topic }
-  let(:topic2)    { Fabricate :topic }
-  let(:topic3)    { Fabricate :topic }
-  let(:topic4)    { Fabricate :topic }
-  let(:user1)     { Fabricate :user, username: "mrb", name: "Michael Madsen", last_seen_at: 10.days.ago }
-  let(:user2)     { Fabricate :user, username: "mrblue",   name: "Eddie Code", last_seen_at: 9.days.ago }
-  let(:user3)     { Fabricate :user, username: "mrorange", name: "Tim Roth", last_seen_at: 8.days.ago }
-  let(:user4)     { Fabricate :user, username: "mrpink",   name: "Steve Buscemi",  last_seen_at: 7.days.ago }
-  let(:user5)     { Fabricate :user, username: "mrbrown",  name: "Quentin Tarantino", last_seen_at: 6.days.ago }
-  let(:user6)     { Fabricate :user, username: "mrwhite",  name: "Harvey Keitel",  last_seen_at: 5.days.ago }
-  let!(:inactive) { Fabricate :user, username: "Ghost", active: false }
-  let(:admin)     { Fabricate :admin, username: "theadmin" }
-  let(:moderator) { Fabricate :moderator, username: "themod" }
-  let(:staged)    { Fabricate :staged }
+  fab!(:indexer) { SearchIndexer.enable } # Enable before fab! topics/users
+  before { SearchIndexer.enable } # Enable for each test
 
-  before do
-    SearchIndexer.enable
-  end
+  fab!(:topic)     { Fabricate :topic }
+  fab!(:topic2)    { Fabricate :topic }
+  fab!(:topic3)    { Fabricate :topic }
+  fab!(:topic4)    { Fabricate :topic }
+  fab!(:user1)     { Fabricate :user, username: "mrb", name: "Michael Madsen", last_seen_at: 10.days.ago }
+  fab!(:user2)     { Fabricate :user, username: "mrblue",   name: "Eddie Code", last_seen_at: 9.days.ago }
+  fab!(:user3)     { Fabricate :user, username: "mrorange", name: "Tim Roth", last_seen_at: 8.days.ago }
+  fab!(:user4)     { Fabricate :user, username: "mrpink",   name: "Steve Buscemi",  last_seen_at: 7.days.ago }
+  fab!(:user5)     { Fabricate :user, username: "mrbrown",  name: "Quentin Tarantino", last_seen_at: 6.days.ago }
+  fab!(:user6)     { Fabricate :user, username: "mrwhite",  name: "Harvey Keitel",  last_seen_at: 5.days.ago }
+  fab!(:inactive) { Fabricate :user, username: "Ghost", active: false }
+  fab!(:admin)     { Fabricate :admin, username: "theadmin" }
+  fab!(:moderator) { Fabricate :moderator, username: "themod" }
+  fab!(:staged)    { Fabricate :staged }
 
   def search_for(*args)
     UserSearch.new(*args).search
@@ -90,23 +89,17 @@ describe UserSearch do
   end
 
   context "with seed data" do
+    fab!(:post1) { Fabricate :post, user: user1, topic: topic }
+    fab!(:post2) { Fabricate :post, user: user2, topic: topic2 }
+    fab!(:post3) { Fabricate :post, user: user3, topic: topic }
+    fab!(:post4) { Fabricate :post, user: user4, topic: topic }
+    fab!(:post5) { Fabricate :post, user: user5, topic: topic3 }
+    fab!(:post6) { Fabricate :post, user: user6, topic: topic }
+    fab!(:post7) { Fabricate :post, user: staged, topic: topic4 }
 
-    before do
+    before { user6.update(suspended_at: 1.day.ago, suspended_till: 1.year.from_now) }
 
-      Fabricate :post, user: user1, topic: topic
-      Fabricate :post, user: user2, topic: topic2
-      Fabricate :post, user: user3, topic: topic
-      Fabricate :post, user: user4, topic: topic
-      Fabricate :post, user: user5, topic: topic3
-      Fabricate :post, user: user6, topic: topic
-      Fabricate :post, user: staged, topic: topic4
-
-      user6.update(suspended_at: 1.day.ago, suspended_till: 1.year.from_now)
-    end
-
-    # this is a seriously expensive integration test,
-    # re-creating this entire test db is too expensive reuse
-    it "operates correctly" do
+    it "can search by name and username" do
       # normal search
       results = search_for(user1.name.split(" ").first)
       expect(results.size).to eq(1)
@@ -126,7 +119,9 @@ describe UserSearch do
       results = search_for(user4.username.upcase)
       expect(results.size).to eq(1)
       expect(results.first).to eq(user4)
+    end
 
+    it "handles substring search correctly" do
       # substrings
       # only staff members see suspended users in results
       results = search_for("mr")
@@ -147,7 +142,9 @@ describe UserSearch do
 
       results = search_for("MRB", searching_user: admin, limit: 2)
       expect(results.size).to eq(2)
+    end
 
+    it "prioritises topic participants" do
       # topic priority
       results = search_for(user1.username, topic_id: topic.id)
       expect(results.first).to eq(user1)
@@ -157,7 +154,9 @@ describe UserSearch do
 
       results = search_for(user1.username, topic_id: topic3.id)
       expect(results[1]).to eq(user5)
+    end
 
+    it "only searches by name when enabled" do
       # When searching by name is enabled, it returns the record
       SiteSetting.enable_names = true
       results = search_for("Tarantino")
@@ -173,11 +172,15 @@ describe UserSearch do
       SiteSetting.enable_names = false
       results = search_for("Tarantino")
       expect(results.size).to eq(0)
+    end
 
+    it "prioritises exact matches" do
       # find an exact match first
       results = search_for("mrB")
       expect(results.first.username).to eq(user1.username)
+    end
 
+    it "does not include self, staged or inactive" do
       # don't return inactive users
       results = search_for(inactive.username)
       expect(results).to be_blank