test(runtime/health): cover lua healthchecks

- Add tests for lua healthchecks (failure, success and submodules).
- Reword some of the test naming for improved logs readability.
- Modify render test to accomodate the changes of the health autoload function.
- Add test for :checkhealth completion of Lua healtchecks.

test/functional/fixtures/autoload/health/full_render.vim

@@ -0,0 +1,8 @@
+function! health#full_render#check()
+  call health#report_start("report 1")
+  call health#report_ok("life is fine")
+  call health#report_warn("no what installed", ["pip what", "make what"])
+  call health#report_start("report 2")
+  call health#report_info("stuff is stable")
+  call health#report_error("why no hardcopy", [":h :hardcopy", ":h :TOhtml"])
+endfunction

test/functional/fixtures/lua/test_plug/health/init.lua

@@ -0,0 +1,11 @@
+local M = {}
+local health = require("health")
+
+M.check = function()
+  health.report_start("report 1")
+  health.report_ok("everything is fine")
+  health.report_start("report 2")
+  health.report_ok("nothing to see here")
+end
+
+return M

test/functional/fixtures/lua/test_plug/submodule/health.lua

@@ -0,0 +1,11 @@
+local M = {}
+local health = require("health")
+
+M.check = function()
+  health.report_start("report 1")
+  health.report_ok("everything is fine")
+  health.report_start("report 2")
+  health.report_ok("nothing to see here")
+end
+
+return M

test/functional/fixtures/lua/test_plug/submodule_failed/health.lua

@@ -0,0 +1,12 @@
+local M = {}
+local health = require("health")
+
+M.check = function()
+  health.report_start("report 1")
+  health.report_ok("everything is fine")
+  health.report_warn("About to add a number to nil")
+  local a = nil + 2
+  return a
+end
+
+return M

test/functional/plugin/health_spec.lua

@@ -1,4 +1,5 @@
 local helpers = require('test.functional.helpers')(after_each)
+local global_helpers = require('test.helpers')
 local Screen = require('test.functional.ui.screen')
 
 local clear = helpers.clear
@@ -48,42 +49,34 @@ describe('health.vim', function()
     command("set runtimepath+=test/functional/fixtures")
   end)
 
-  it("health#report_*()", function()
-    helpers.source([[
-      let g:health_report = execute([
-        \ "call health#report_start('Check Bar')",
-        \ "call health#report_ok('Bar status')",
-        \ "call health#report_ok('Other Bar status')",
-        \ "call health#report_warn('Zub')",
-        \ "call health#report_start('Baz')",
-        \ "call health#report_warn('Zim', ['suggestion 1', 'suggestion 2'])"
-        \ ])
-    ]])
-    local result = helpers.eval("g:health_report")
-
-    helpers.eq(helpers.dedent([[
-
-
-      ## Check Bar
-        - OK: Bar status
-        - OK: Other Bar status
-        - WARNING: Zub
-
-      ## Baz
-        - WARNING: Zim
-          - ADVICE:
-            - suggestion 1
-            - suggestion 2]]),
-      result)
-  end)
-
-
   describe(":checkhealth", function()
-    it("concatenates multiple reports", function()
-      command("checkhealth success1 success2")
+    it("functions health#report_*() render correctly", function()
+      command("checkhealth full_render")
       helpers.expect([[
 
-        health#success1#check
+      full_render: health#full_render#check
+      ========================================================================
+      ## report 1
+        - OK: life is fine
+        - WARNING: no what installed
+          - ADVICE:
+            - pip what
+            - make what
+
+      ## report 2
+        - INFO: stuff is stable
+        - ERROR: why no hardcopy
+          - ADVICE:
+            - :help |:hardcopy|
+            - :help |:TOhtml|
+      ]])
+    end)
+
+    it("concatenates multiple reports", function()
+      command("checkhealth success1 success2 test_plug")
+      helpers.expect([[
+
+        success1: health#success1#check
         ========================================================================
         ## report 1
           - OK: everything is fine
@@ -91,25 +84,109 @@ describe('health.vim', function()
         ## report 2
           - OK: nothing to see here
 
-        health#success2#check
+        success2: health#success2#check
         ========================================================================
         ## another 1
           - OK: ok
+
+        test_plug: require("test_plug.health").check()
+        ========================================================================
+        ## report 1
+          - OK: everything is fine
+
+        ## report 2
+          - OK: nothing to see here
         ]])
     end)
 
+    it("lua plugins", function()
+      command("checkhealth test_plug")
+      helpers.expect([[
+
+        test_plug: require("test_plug.health").check()
+        ========================================================================
+        ## report 1
+          - OK: everything is fine
+
+        ## report 2
+          - OK: nothing to see here
+        ]])
+    end)
+
+    it("lua plugins submodules", function()
+      command("checkhealth test_plug.submodule")
+      helpers.expect([[
+
+        test_plug.submodule: require("test_plug.submodule.health").check()
+        ========================================================================
+        ## report 1
+          - OK: everything is fine
+
+        ## report 2
+          - OK: nothing to see here
+        ]])
+    end)
+
+    it("lua plugins submodules with expression '*'", function()
+      command("checkhealth test_plug*")
+      local buf_lines = helpers.curbuf('get_lines', 0, -1, true)
+      -- avoid dealing with path separators
+      local received = table.concat(buf_lines, '\n', 1, #buf_lines - 2)
+      local expected = helpers.dedent([[
+
+        test_plug: require("test_plug.health").check()
+        ========================================================================
+        ## report 1
+          - OK: everything is fine
+
+        ## report 2
+          - OK: nothing to see here
+
+        test_plug.submodule: require("test_plug.submodule.health").check()
+        ========================================================================
+        ## report 1
+          - OK: everything is fine
+
+        ## report 2
+          - OK: nothing to see here
+
+        test_plug.submodule_failed: require("test_plug.submodule_failed.health").check()
+        ========================================================================
+          - ERROR: Failed to run healthcheck for "test_plug.submodule_failed" plugin. Exception:
+            function health#check, line 24]])
+      eq(expected, received)
+    end)
+
     it("gracefully handles broken healthcheck", function()
       command("checkhealth broken")
       helpers.expect([[
 
-        health#broken#check
+        broken: health#broken#check
         ========================================================================
           - ERROR: Failed to run healthcheck for "broken" plugin. Exception:
-            function health#check[21]..health#broken#check, line 1
+            function health#check[24]..health#broken#check, line 1
             caused an error
         ]])
     end)
 
+    it("gracefully handles broken lua healthcheck", function()
+      command("checkhealth test_plug.submodule_failed")
+      local buf_lines = helpers.curbuf('get_lines', 0, -1, true)
+      local received = table.concat(buf_lines, '\n', 1, #buf_lines - 2)
+      -- avoid dealing with path separators
+      local lua_err = "attempt to perform arithmetic on a nil value"
+      local last_line = buf_lines[#buf_lines - 1]
+      assert(string.find(last_line, lua_err) ~= nil, "Lua error not present")
+
+      local expected = global_helpers.dedent([[
+
+        test_plug.submodule_failed: require("test_plug.submodule_failed.health").check()
+        ========================================================================
+          - ERROR: Failed to run healthcheck for "test_plug.submodule_failed" plugin. Exception:
+            function health#check, line 24]])
+      eq(expected, received)
+    end)
+
     it("highlights OK, ERROR", function()
       local screen = Screen.new(72, 10)
       screen:attach()
@@ -126,11 +203,11 @@ describe('health.vim', function()
       command("set laststatus=0")
       screen:expect{grid=[[
         ^                                                                        |
-        {Heading:health#foo#check}                                                        |
+        {Heading:foo: }                                                                   |
         {Bar:========================================================================}|
         {Bullet:  -} {Error:ERROR:} No healthcheck found for "foo" plugin.                       |
                                                                                 |
-        {Heading:health#success1#check}                                                   |
+        {Heading:success1: health#success1#check}                                         |
         {Bar:========================================================================}|
         {Heading2:##}{Heading: report 1}                                                             |
         {Bullet:  -} {Ok:OK:} everything is fine                                              |
@@ -140,9 +217,10 @@ describe('health.vim', function()
 
     it("gracefully handles invalid healthcheck", function()
       command("checkhealth non_existent_healthcheck")
+      -- luacheck: ignore 613
       helpers.expect([[
 
-        health#non_existent_healthcheck#check
+        non_existent_healthcheck: 
         ========================================================================
           - ERROR: No healthcheck found for "non_existent_healthcheck" plugin.
         ]])