feat: self-update of master and agents (#15)

internal/master/web/server_test.go

@@ -303,7 +303,8 @@ func TestOverview_GroupsServicesPerMachineAndSwarm(t *testing.T) {
 	assert.Contains(t, body, `<span class="stk">slusk</span>`)
 	assert.Contains(t, body, "jellyfin_jellyfin", "Swarm service names are shown as they are")
 	assert.Contains(t, body, "sha256:0f42497a69fa…", "digests are shortened")
-	assert.Contains(t, body, "Managed outside")
+	assert.Contains(t, body, `<span class="tag f-out">This agent</span>`)
+	assert.NotContains(t, body, "Managed outside")
 	assert.Less(t, strings.Index(body, ">Swarm</h2>"), strings.Index(body, ">node-2</h2>"), "a cluster is followed by its managers' machines")
 	assert.Contains(t, body, `class="sub" data-machine="agent-2"`, "the machine filter lists the manager under the cluster")
 }
@@ -513,6 +514,7 @@ func TestAgentSnippet(t *testing.T) {
 	assert.Contains(t, snippet, "UPDATE_TIMEOUT: 5m")
 	assert.Contains(t, snippet, "      # DOCKER_CONFIG: /docker-config\n")
 	assert.Contains(t, snippet, "      # - /path/to/stacks:/path/to/stacks  # mount each stacks directory at the same path, read-write\n")
+	assert.Contains(t, snippet, "also this agent's own stack directory")
 	assert.Contains(t, snippet, "AGENT_TOKEN: tok")
 }
 
@@ -762,7 +764,8 @@ func TestOverview_ShowsModeToggleAndAvailableBadge(t *testing.T) {
 		assert.Contains(t, body, `<input type="hidden" name="mode" value="auto">`, "manual services toggle to auto: "+path)
 		assert.Contains(t, body, `aria-checked="false" disabled title="`+model.ReasonBuilt+`">`, "blocked manual services get a disabled switch: "+path)
 		assert.Contains(t, body, `<span class="na">`+model.ReasonBuilt+`</span>`, "and say why: "+path)
-		assert.Contains(t, body, `<span class="na">n/a</span>`, "services managed outside have no switch: "+path)
+		assert.Contains(t, body, `action="/services/3/mode"`, "the agent's own service has a switch like any other: "+path)
+		assert.NotContains(t, body, `<span class="na">n/a</span>`, path)
 	}
 }