Use random usernames to unittest

Don't replace the database with a unittest database, just use
the usual database and user randomly generated usernames so we
don't have collisions.

spec/login_spec.lua

@@ -1,6 +1,7 @@
 
 _G.spy = spy
 local mock_env = require("spec.env_mock")
+local rng = require("spec.fuzzgen")
 
 describe("smr login",function()
 	setup(mock_env.setup)
@@ -52,15 +53,14 @@ describe("smr login",function()
 		)
 	end)
 	it("should give a session cookie when logging in with a user",function()
-		pending("Look at cleaning mock env")
-		mock_env.mockdb()
 		local claim_post = require("endpoints.claim_post")
 		local login_post = require("endpoints.login_post")
 		local config = require("config")
 		local db = require("db")
+		local session = require("session")
 		configure()
 
-		local username = "nuser"
+		local username = rng.subdomain()
 		local claim_req = {
 			method = "POST",
 			host = "test.host",
@@ -81,7 +81,9 @@ describe("smr login",function()
 				pass = claim_req.response
 			}
 		}
+		sessionspy = spy.on(session,"start")
 		login_post(login_req)
+		assert.spy(sessionspy).was.called()
 		local code = login_req.responsecode
 		assert(
 			code >= 300 and code <= 400,
@@ -123,8 +125,6 @@ describe("smr login",function()
 		)
 	end)
 	it("should allow logged in users the option of posting under their username",function()
-		pending("Fix up cleaning db for unit tests")
-		mock_env.mockdb()
 		local claim_post = require("endpoints.claim_post")
 		local login_post = require("endpoints.login_post")
 		local paste_get = require("endpoints.paste_get")
@@ -134,12 +134,13 @@ describe("smr login",function()
 		local config = require("config")
 		config.domain = "test.host"
 		configure()
+		local username = rng.subdomain()
 		local claim_req = {
 			method = "POST",
 			host = "test.host",
 			path = "/_claim",
 			args = {
-				user = "user"
+				user = username
 			}
 		}
 		claim_post(claim_req)
@@ -148,7 +149,7 @@ describe("smr login",function()
 			host = "test.host",
 			path = "/_login",
 			args = {
-				user = "user"
+				user = username
 			},
 			file = {
 				pass = claim_req.response
@@ -159,14 +160,14 @@ describe("smr login",function()
 		local sessionid = cookie:match("session=([^;]+)")
 		local paste_req_get = {
 			method = "GET",
-			host = "user.test.host",
+			host = username .. ".test.host",
 			path = "/_paste",
 			cookies = {
 				session = sessionid
 			}
 		}
 		paste_get(paste_req_get)
-		local option = '<option value="user">user</option>'
+		local option = '<option value="' .. username .. '">' .. username .. '</option>'
 		assert(
 			paste_req_get.response:find(option),
 			"After logging in the user should have an option to "..
@@ -175,7 +176,7 @@ describe("smr login",function()
 		)
 		local paste_req_post = {
 			method = "POST",
-			host = "user.test.host",
+			host = username .. ".test.host",
 			path = "/_paste",
 			cookies = {
 				session = sessionid
@@ -198,7 +199,7 @@ describe("smr login",function()
 		local redirect = paste_req_post.response_headers.Location:match("(/[^/]*)$")
 		local read_req_get = {
 			method = "GET",
-			host = "user.test.host",
+			host = username .. ".test.host",
 			path = redirect,
 			cookies = {
 				session = sessionid
@@ -212,7 +213,7 @@ describe("smr login",function()
 			"Failed to find post title in response."
 		)
 		assert(
-			response:find([[By <a href="https://user.test.host">user</a>]]),
+			response:find('By <a href="https://' .. username .. '.test.host">' .. username .. '</a>'),
 			"Failed to find the author name after a paste."
 		)
 		assert(