Fix issue #200: Prevent generation of empty Visual Studio .user files

CHANGES.txt

@@ -13,3 +13,4 @@ Since 5.0-alpha1:
 * Action arguments (_ARGS) are now keyed by both index and value
 * Configuration baking and validation now skipped for execute only actions
 * os.findlib() now accepts paths to search as argument
+* Visual Studio .user files are now only generated if not empty

src/actions/vstudio/vs2005.lua

@@ -1,7 +1,7 @@
 --
 -- actions/vstudio/vs2005.lua
 -- Add support for the  Visual Studio 2005 project formats.
--- Copyright (c) 2008-2014 Jason Perkins and the Premake project
+-- Copyright (c) 2008-2015 Jason Perkins and the Premake project
 --
 
 	premake.vstudio.vs2005 = {}
@@ -31,10 +31,22 @@
 
 		if premake.project.isdotnet(prj) then
 			premake.generate(prj, ".csproj", vstudio.cs2005.generate)
-			premake.generate(prj, ".csproj.user", vstudio.cs2005.generate_user)
+
+			-- Skip generation of empty user files
+			local user = p.capture(function() vstudio.cs2005.generateUser(prj) end)
+			if #user > 0 then
+				p.generate(prj, ".csproj.user", function() p.outln(user) end)
+			end
+
 		elseif premake.project.iscpp(prj) then
 			premake.generate(prj, ".vcproj", vstudio.vc200x.generate)
-			premake.generate(prj, ".vcproj.user", vstudio.vc200x.generate_user)
+
+			-- Skip generation of empty user files
+			local user = p.capture(function() vstudio.vc200x.generateUser(prj) end)
+			if #user > 0 then
+				p.generate(prj, ".vcproj.user", function() p.outln(user) end)
+			end
+
 		end
 	end
 

src/actions/vstudio/vs2005_csproj_user.lua

@@ -1,52 +1,90 @@
 --
 -- vs2005_csproj_user.lua
 -- Generate a Visual Studio 2005/2008 C# .user file.
--- Copyright (c) 2009-2014 Jason Perkins and the Premake project
+-- Copyright (c) 2009-2015 Jason Perkins and the Premake project
 --
 
 	local p = premake
-	local cs2005 = p.vstudio.cs2005
-	local project = p.project
+	local m = p.vstudio.cs2005
 
 
 --
--- Generate a Visual Studio 200x C# user file, with support for the new platforms API.
+-- Generate a Visual Studio 200x C# user file.
 --
 
-	function cs2005.generate_user(prj)
-		p.vstudio.projectElement()
-		_p(1,'<PropertyGroup>')
+	m.elements.userProjectPropertyGroup = function()
+		return {
+			m.referencePath,
+		}
+	end
 
-		-- Per-configuration reference paths aren't supported (are they?) so just
-		-- use the first configuration in the project
-		local cfg = project.getfirstconfig(prj)
+	m.elements.userConfigPropertyGroup = function()
+		return {
+			m.localDebuggerCommandArguments,
+		}
+	end
 
-		local refpaths = path.translate(project.getrelative(prj, cfg.libdirs))
-		_p(2,'<ReferencePath>%s</ReferencePath>', table.concat(refpaths, ";"))
-
-		_p('  </PropertyGroup>')
-
-		for cfg in project.eachconfig(prj) do
-			local contents = p.capture(function()
-				cs2005.debugsettings(cfg)
+	function m.generateUser(prj)
+		-- Only want output if there is something to configure
+		local prjGroup = p.capture(function()
+			p.push(2)
+			p.callArray(m.elements.userProjectPropertyGroup, prj)
+			p.pop(2)
 		end)
 
-			if #contents > 0 then
-				_p(1,'<PropertyGroup %s>', cs2005.condition(cfg))
-				p.outln(contents)
-				_p(1,'</PropertyGroup>')
+		local contents = {}
+		local size = 0
+
+		for cfg in p.project.eachconfig(prj) do
+			contents[cfg] = p.capture(function()
+				p.push(2)
+				p.callArray(m.elements.userConfigPropertyGroup, cfg)
+				p.pop(2)
+			end)
+			size = size + #contents[cfg]
+		end
+
+		if #prjGroup > 0 or size > 0 then
+			p.vstudio.projectElement()
+
+			if #prjGroup > 0 then
+				p.push('<PropertyGroup>')
+				p.outln(prjGroup)
+				p.pop('</PropertyGroup>')
+			end
+
+			for cfg in p.project.eachconfig(prj) do
+				if #contents[cfg] > 0 then
+					p.push('<PropertyGroup %s>', m.condition(cfg))
+					p.outln(contents[cfg])
+					p.pop('</PropertyGroup>')
 				end
 			end
 
-		_p('</Project>')
+			p.pop('</Project>')
+		end
 	end
 
-	function cs2005.debugsettings(cfg)
-		cs2005.localDebuggerCommandArguments(cfg)
+
+
+---
+-- Output any reference paths required by the project.
+---
+
+	function m.referencePath(prj)
+		-- Per-configuration reference paths aren't supported (are they?) so just
+		-- use the first configuration in the project
+		local cfg = p.project.getfirstconfig(prj)
+		local paths = path.translate(p.project.getrelative(prj, cfg.libdirs))
+		if #paths > 0 then
+			p.w('<ReferencePath>%s</ReferencePath>', table.concat(paths, ";"))
+		end
 	end
 
-	function cs2005.localDebuggerCommandArguments(cfg)
+
+
+	function m.localDebuggerCommandArguments(cfg)
 		if #cfg.debugargs > 0 then
-			_x(2,'<StartArguments>%s</StartArguments>', table.concat(cfg.debugargs, " "))
+			p.x('<StartArguments>%s</StartArguments>', table.concat(cfg.debugargs, " "))
 		end
 	end

src/actions/vstudio/vs200x_vcproj_user.lua

@@ -1,38 +1,72 @@
 --
 -- vs200x_vcproj_user.lua
 -- Generate a Visual Studio 2002-2008 C/C++ project .user file
--- Copyright (c) 2011-2013 Jason Perkins and the Premake project
+-- Copyright (c) 2011-2015 Jason Perkins and the Premake project
 --
 
 	local p = premake
-	local vstudio = premake.vstudio
-	local project = p.project
-
 	local m = p.vstudio.vc200x
 
 
+
 --
 -- Generate a Visual Studio 200x C++ user file, with support for the new platforms API.
 --
 
-	function m.generate_user(prj)
-		p.indent("\t")
-		m.xmlElement()
-		p.push('<VisualStudioUserFile')
-		p.w('ProjectType="Visual C++"')
-		m.version()
-		p.w('ShowAllFiles="false"')
-		p.w('>')
+	m.elements.user = function(cfg)
+		return {
+			m.debugSettings,
+		}
+	end
 
+	function m.generateUser(prj)
+		p.indent("\t")
+
+		-- Only want output if there is something to configure
+		local contents = {}
+		local size = 0
+
+		for cfg in p.project.eachconfig(prj) do
+			contents[cfg] = p.capture(function()
+				p.push(4)
+				p.callArray(m.elements.user, cfg)
+				p.pop(4)
+			end)
+			size = size + #contents[cfg]
+		end
+
+		if size > 0 then
+			m.xmlElement()
+			m.visualStudioUserFile()
 			p.push('<Configurations>')
-		for cfg in project.eachconfig(prj) do
-			m.userconfiguration(cfg)
-			m.debugdir(cfg)
+			for cfg in p.project.eachconfig(prj) do
+				m.userConfiguration(cfg)
+				p.push('<DebugSettings')
+				if #contents[cfg] > 0 then
+					p.outln(contents[cfg])
+				end
+				p.pop('/>')
 				p.pop('</Configuration>')
 			end
 			p.pop('</Configurations>')
 			p.pop('</VisualStudioUserFile>')
 		end
+	end
+
+
+
+---
+-- Output the opening project tag.
+---
+
+	function m.visualStudioUserFile()
+		p.push('<VisualStudioUserFile')
+		p.w('ProjectType="Visual C++"')
+		m.version()
+		p.w('ShowAllFiles="false"')
+		p.w('>')
+	end
+
 
 
 --
@@ -40,40 +74,60 @@
 -- build configuration/platform pairing.
 --
 
-	function m.userconfiguration(cfg)
+	function m.userConfiguration(cfg)
 		p.push('<Configuration')
-		p.x('Name="%s"', vstudio.projectConfig(cfg))
+		p.x('Name="%s"', p.vstudio.projectConfig(cfg))
 		p.w('>')
 	end
 
 
+
 --
 -- Write out the debug settings for this project.
 --
 
-	function m.debugdir(cfg)
-		p.push('<DebugSettings')
-
-		if cfg.debugcommand then
-			local command = project.getrelative(cfg.project, cfg.debugcommand)
-			p.x('Command="%s"', path.translate(command))
+	m.elements.debugSettings = function(cfg)
+		return {
+			m.debugCommand,
+			m.debugDir,
+			m.debugArgs,
+			m.debugEnvironment,
+		}
 	end
 
-		if cfg.debugdir then
-			local debugdir = project.getrelative(cfg.project, cfg.debugdir)
-			p.x('WorkingDirectory="%s"', path.translate(debugdir))
+	function m.debugSettings(cfg)
+		p.callArray(m.elements.debugSettings, cfg)
 	end
 
+
+	function m.debugArgs(cfg)
 		if #cfg.debugargs > 0 then
 			p.x('CommandArguments="%s"', table.concat(cfg.debugargs, " "))
 		end
+	end
 
+
+	function m.debugCommand(cfg)
+		if cfg.debugcommand then
+			local command = p.project.getrelative(cfg.project, cfg.debugcommand)
+			p.x('Command="%s"', path.translate(command))
+		end
+	end
+
+
+	function m.debugDir(cfg)
+		if cfg.debugdir then
+			local debugdir = p.project.getrelative(cfg.project, cfg.debugdir)
+			p.x('WorkingDirectory="%s"', path.translate(debugdir))
+		end
+	end
+
+
+	function m.debugEnvironment(cfg)
 		if #cfg.debugenvs > 0 then
 			p.x('Environment="%s"', table.concat(cfg.debugenvs, "\n"))
 			if cfg.flags.DebugEnvsDontMerge then
 				p.x('EnvironmentMerge="false"')
 			end
 		end
-
-		p.pop('/>')
 	end

src/actions/vstudio/vs2010.lua

@@ -1,7 +1,7 @@
 --
 -- actions/vstudio/vs2010.lua
 -- Add support for the Visual Studio 2010 project formats.
--- Copyright (c) 2009-2014 Jason Perkins and the Premake project
+-- Copyright (c) 2009-2015 Jason Perkins and the Premake project
 --
 
 	premake.vstudio.vs2010 = {}
@@ -40,15 +40,27 @@
 
 		if premake.project.isdotnet(prj) then
 			premake.generate(prj, ".csproj", vstudio.cs2005.generate)
-			premake.generate(prj, ".csproj.user", vstudio.cs2005.generate_user)
+
+			-- Skip generation of empty user files
+			local user = p.capture(function() vstudio.cs2005.generateUser(prj) end)
+			if #user > 0 then
+				p.generate(prj, ".csproj.user", function() p.outln(user) end)
+			end
+
 		elseif premake.project.iscpp(prj) then
 			premake.generate(prj, ".vcxproj", vstudio.vc2010.generate)
-			premake.generate(prj, ".vcxproj.user", vstudio.vc2010.generateUser)
+
+			-- Skip generation of empty user files
+			local user = p.capture(function() vstudio.vc2010.generateUser(prj) end)
+			if #user > 0 then
+				p.generate(prj, ".vcxproj.user", function() p.outln(user) end)
+			end
 
 			-- Only generate a filters file if the source tree actually has subfolders
 			if tree.hasbranches(project.getsourcetree(prj)) then
 				premake.generate(prj, ".vcxproj.filters", vstudio.vc2010.generateFilters)
 			end
+
 		end
 	end
 

src/actions/vstudio/vs2010_vcxproj_user.lua

@@ -1,36 +1,55 @@
 --
 -- vs2010_vcxproj_user.lua
 -- Generate a Visual Studio 201x C/C++ project .user file
--- Copyright (c) 2011-2013 Jason Perkins and the Premake project
+-- Copyright (c) 2011-2015 Jason Perkins and the Premake project
 --
 
 	local p = premake
-	local vstudio = p.vstudio
-	local vc2010 = p.vstudio.vc2010
-	local project = p.project
-
 	local m = p.vstudio.vc2010
 
 
 --
--- Generate a Visual Studio 201x C++ user file, with support for the new platforms API.
+-- Generate a Visual Studio 201x C++ user file.
 --
 
+	m.elements.user = function(cfg)
+		return {
+			m.debugSettings,
+		}
+	end
+
 	function m.generateUser(prj)
+		-- Only want output if there is something to configure
+		local contents = {}
+		local size = 0
+
+		for cfg in p.project.eachconfig(prj) do
+			contents[cfg] = p.capture(function()
+				p.push(2)
+				p.callArray(m.elements.user, cfg)
+				p.pop(2)
+			end)
+			size = size + #contents[cfg]
+		end
+
+		if size > 0 then
 			m.xmlDeclaration()
 			m.userProject()
-		for cfg in project.eachconfig(prj) do
+			for cfg in p.project.eachconfig(prj) do
 				p.push('<PropertyGroup %s>', m.condition(cfg))
-			m.debugSettings(cfg)
+				if #contents[cfg] > 0 then
+					p.outln(contents[cfg])
+				end
 				p.pop('</PropertyGroup>')
 			end
-		_p('</Project>')
+			p.pop('</Project>')
+		end
 	end
 
 
 
 --
--- Output the XML declaration and opening <Project> tag.
+-- Output the opening <Project> tag.
 --
 
 	function m.userProject()
@@ -41,24 +60,24 @@
 
 
 
-	vc2010.elements.debugSettings = function(cfg)
+	m.elements.debugSettings = function(cfg)
 		return {
-			vc2010.localDebuggerCommand,
-			vc2010.localDebuggerWorkingDirectory,
-			vc2010.debuggerFlavor,
-			vc2010.localDebuggerCommandArguments,
-			vc2010.localDebuggerEnvironment,
-			vc2010.localDebuggerMergeEnvironment,
+			m.localDebuggerCommand,
+			m.localDebuggerWorkingDirectory,
+			m.debuggerFlavor,
+			m.localDebuggerCommandArguments,
+			m.localDebuggerEnvironment,
+			m.localDebuggerMergeEnvironment,
 		}
 	end
 
-	function vc2010.debugSettings(cfg)
-		p.callArray(vc2010.elements.debugSettings, cfg)
+	function m.debugSettings(cfg)
+		p.callArray(m.elements.debugSettings, cfg)
 	end
 
 
 
-	function vc2010.debuggerFlavor(cfg)
+	function m.debuggerFlavor(cfg)
 		if cfg.debugdir or cfg.debugcommand then
 			p.w('<DebuggerFlavor>WindowsLocalDebugger</DebuggerFlavor>')
 		end
@@ -66,16 +85,16 @@
 
 
 
-	function vc2010.localDebuggerCommand(cfg)
+	function m.localDebuggerCommand(cfg)
 		if cfg.debugcommand then
-			local dir = project.getrelative(cfg.project, cfg.debugcommand)
+			local dir = p.project.getrelative(cfg.project, cfg.debugcommand)
 			p.w('<LocalDebuggerCommand>%s</LocalDebuggerCommand>', path.translate(dir))
 		end
 	end
 
 
 
-	function vc2010.localDebuggerCommandArguments(cfg)
+	function m.localDebuggerCommandArguments(cfg)
 		if #cfg.debugargs > 0 then
 			p.x('<LocalDebuggerCommandArguments>%s</LocalDebuggerCommandArguments>', table.concat(cfg.debugargs, " "))
 		end
@@ -83,16 +102,16 @@
 
 
 
-	function vc2010.localDebuggerWorkingDirectory(cfg)
+	function m.localDebuggerWorkingDirectory(cfg)
 		if cfg.debugdir then
-			local dir = project.getrelative(cfg.project, cfg.debugdir)
+			local dir = p.project.getrelative(cfg.project, cfg.debugdir)
 			p.x('<LocalDebuggerWorkingDirectory>%s</LocalDebuggerWorkingDirectory>', path.translate(dir))
 		end
 	end
 
 
 
-	function vc2010.localDebuggerEnvironment(cfg)
+	function m.localDebuggerEnvironment(cfg)
 		if #cfg.debugenvs > 0 then
 			local envs = table.concat(cfg.debugenvs, "\n")
 			if cfg.flags.DebugEnvsInherit then
@@ -108,7 +127,7 @@
 
 
 
-	function vc2010.localDebuggerMergeEnvironment(cfg)
+	function m.localDebuggerMergeEnvironment(cfg)
 		if #cfg.debugenvs > 0 and cfg.flags.DebugEnvsDontMerge then
 			p.w(2,'<LocalDebuggerMergeEnvironment>false</LocalDebuggerMergeEnvironment>')
 		end

src/base/premake.lua

@@ -164,6 +164,7 @@
 		_indentLevel = 0
 		callback(obj)
 		f:close()
+		_indentLevel = 0
 	end
 
 

tests/_tests.lua

@@ -55,7 +55,7 @@ return {
 	"tools/test_gcc.lua",
 	"tools/test_msc.lua",
 
-	-- Visual Studio 2005-2010 C# projects
+	-- Visual Studio 2005-2013 C# projects
 	"actions/vstudio/cs2005/test_assembly_refs.lua",
 	"actions/vstudio/cs2005/test_build_events.lua",
 	"actions/vstudio/cs2005/test_common_props.lua",
@@ -69,8 +69,9 @@ return {
 	"actions/vstudio/cs2005/test_project_refs.lua",
 	"actions/vstudio/cs2005/projectsettings.lua",
 	"actions/vstudio/cs2005/test_targets.lua",
+	"actions/vstudio/cs2005/test_user_file.lua",
 
-	-- Visual Studio 2005-2010 solutions
+	-- Visual Studio 2005-2013 solutions
 	"actions/vstudio/sln2005/test_dependencies.lua",
 	"actions/vstudio/sln2005/test_header.lua",
 	"actions/vstudio/sln2005/test_nested_projects.lua",
@@ -92,8 +93,9 @@ return {
 	"actions/vstudio/vc200x/test_project.lua",
 	"actions/vstudio/vc200x/test_project_refs.lua",
 	"actions/vstudio/vc200x/test_resource_compiler.lua",
+	"actions/vstudio/vc200x/test_user_file.lua",
 
-	-- Visual Studio 2010 C/C++ projects
+	-- Visual Studio 2010-2013 C/C++ projects
 	"actions/vstudio/vc2010/test_assembly_refs.lua",
 	"actions/vstudio/vc2010/test_build_events.lua",
 	"actions/vstudio/vc2010/test_compile_settings.lua",
@@ -118,6 +120,7 @@ return {
 	"actions/vstudio/vc2010/test_prop_sheet.lua",
 	"actions/vstudio/vc2010/test_resource_compile.lua",
 	"actions/vstudio/vc2010/test_rule_vars.lua",
+	"actions/vstudio/vc2010/test_user_file.lua",
 
 	-- Makefile tests
 	"actions/make/test_make_escaping.lua",

tests/actions/vstudio/cs2005/test_debug_props.lua

@@ -65,12 +65,10 @@
 
 	function suite.debugStartArguments()
 		debugargs "foobar"
-
 		local cfg = test.getconfig(prj, "Debug")
-		cs2005.debugsettings(cfg)
-
+		cs2005.localDebuggerCommandArguments(cfg)
 		test.capture [[
-		<StartArguments>foobar</StartArguments>
+<StartArguments>foobar</StartArguments>
 		]]
 	end
 

tests/actions/vstudio/cs2005/test_user_file.lua

@@ -0,0 +1,49 @@
+--
+-- tests/actions/vstudio/cs2005/test_user_file.lua
+-- Verify handling of empty and non-empty .user files for VC#.
+-- Copyright (c) 2015 Jason Perkins and the Premake project
+--
+
+	local suite = test.declare("vstudio_cs2005_user_file")
+	local cs2005 = premake.vstudio.cs2005
+
+
+--
+-- Setup
+--
+
+	local sln
+
+	function suite.setup()
+		_ACTION = "vs2008"
+		sln = test.createsolution()
+		language "C#"
+	end
+
+	local function prepare()
+		local prj = test.getproject(sln, 1)
+		cs2005.generateUser(prj)
+	end
+
+
+--
+-- If no debugger settings have been specified, then the .user
+-- file should not be written at all.
+--
+
+	function suite.noOutput_onNoSettings()
+		prepare()
+		test.isemptycapture()
+	end
+
+
+--
+-- If a debugger setting has been specified, output.
+--
+
+	function suite.doesOutput_onDebugSettings()
+		debugargs { "hello" }
+		prepare()
+		test.hasoutput()
+	end
+

tests/actions/vstudio/vc200x/test_debug_settings.lua

@@ -22,7 +22,7 @@
 
 	local function prepare()
 		local cfg = test.getconfig(prj, "Debug")
-		vc200x.debugdir(cfg)
+		vc200x.debugSettings(cfg)
 	end
 
 
@@ -32,10 +32,7 @@
 
 	function suite.emptyBlock_onNoSettings()
 		prepare()
-		test.capture [[
-<DebugSettings
-/>
-		]]
+		test.isemptycapture()
 	end
 
 
@@ -49,9 +46,7 @@
 		debugcommand "bin/emulator.exe"
 		prepare()
 		test.capture [[
-<DebugSettings
-	Command="..\bin\emulator.exe"
-/>
+Command="..\bin\emulator.exe"
 		]]
 	end
 
@@ -66,9 +61,7 @@
 		debugdir "bin/debug"
 		prepare()
 		test.capture [[
-<DebugSettings
-	WorkingDirectory="..\bin\debug"
-/>
+WorkingDirectory="..\bin\debug"
 		]]
 	end
 
@@ -81,9 +74,7 @@
 		debugargs { "arg1", "arg2" }
 		prepare()
 		test.capture [[
-<DebugSettings
-	CommandArguments="arg1 arg2"
-/>
+CommandArguments="arg1 arg2"
 		]]
 	end
 
@@ -96,9 +87,7 @@
 		debugenvs { "key=value" }
 		prepare()
 		test.capture [[
-<DebugSettings
-	Environment="key=value"
-/>
+Environment="key=value"
 		]]
 	end
 
@@ -111,9 +100,7 @@
 		debugenvs { 'key="value"' }
 		prepare()
 		test.capture [[
-<DebugSettings
-	Environment="key=&quot;value&quot;"
-/>
+Environment="key=&quot;value&quot;"
 		]]
 	end
 
@@ -127,9 +114,7 @@
 		debugenvs { "key=value", "foo=bar" }
 		prepare()
 		test.capture [[
-<DebugSettings
-	Environment="key=value&#x0A;foo=bar"
-/>
+Environment="key=value&#x0A;foo=bar"
 		]]
 	end
 
@@ -144,9 +129,7 @@
 		flags { "DebugEnvsDontMerge" }
 		prepare()
 		test.capture [[
-<DebugSettings
-	Environment="key=value"
-	EnvironmentMerge="false"
-/>
+Environment="key=value"
+EnvironmentMerge="false"
 		]]
 	end

tests/actions/vstudio/vc200x/test_user_file.lua

@@ -0,0 +1,48 @@
+--
+-- tests/actions/vstudio/vc200x/test_user_file.lua
+-- Verify handling of empty and non-empty .user files for VC'200x.
+-- Copyright (c) 2015 Jason Perkins and the Premake project
+--
+
+	local suite = test.declare("vstudio_vs200x_user_file")
+	local vc200x = premake.vstudio.vc200x
+
+
+--
+-- Setup
+--
+
+	local sln
+
+	function suite.setup()
+		_ACTION = "vs2008"
+		sln = test.createsolution()
+	end
+
+	local function prepare()
+		local prj = test.getproject(sln, 1)
+		vc200x.generateUser(prj)
+	end
+
+
+--
+-- If no debugger settings have been specified, then the .user
+-- file should not be written at all.
+--
+
+	function suite.noOutput_onNoSettings()
+		prepare()
+		test.isemptycapture()
+	end
+
+
+--
+-- If a debugger setting has been specified, output.
+--
+
+	function suite.doesOutput_onDebugSettings()
+		debugcommand "bin/emulator.exe"
+		prepare()
+		test.hasoutput()
+	end
+

tests/actions/vstudio/vc2010/test_user_file.lua

@@ -0,0 +1,48 @@
+--
+-- tests/actions/vstudio/vc2010/test_user_file.lua
+-- Verify handling of empty and non-empty .user files for VC'201x.
+-- Copyright (c) 2015 Jason Perkins and the Premake project
+--
+
+	local suite = test.declare("vstudio_vs2010_user_file")
+	local vc2010 = premake.vstudio.vc2010
+
+
+--
+-- Setup
+--
+
+	local sln
+
+	function suite.setup()
+		_ACTION = "vs2010"
+		sln = test.createsolution()
+	end
+
+	local function prepare()
+		local prj = test.getproject(sln, 1)
+		vc2010.generateUser(prj)
+	end
+
+
+--
+-- If no debugger settings have been specified, then the .user
+-- file should not be written at all.
+--
+
+	function suite.noOutput_onNoSettings()
+		prepare()
+		test.isemptycapture()
+	end
+
+
+--
+-- If a debugger setting has been specified, output.
+--
+
+	function suite.doesOutput_onDebugSettings()
+		debugcommand "bin/emulator.exe"
+		prepare()
+		test.hasoutput()
+	end
+

tests/testfx.lua

@@ -121,6 +121,14 @@
 	end
 
 
+	function test.hasoutput()
+		local actual = premake.captured()
+		if actual == "" then
+			test.fail("expected output, received none");
+		end
+	end
+
+
 	function test.isemptycapture()
 		local actual = premake.captured()
 		if actual ~= "" then