Add test for saving and loading the game

scripts/data/integration_tests/test_lua_api/menu.lua

@@ -1,12 +1,46 @@
 local testing = require('testing_util')
+local matchers = require('matchers')
 local menu = require('openmw.menu')
 
+testing.registerMenuTest('save and load', function()
+    menu.newGame()
+    coroutine.yield()
+    menu.saveGame('save and load')
+    coroutine.yield()
+
+    local directorySaves = {}
+    directorySaves['save_and_load.omwsave'] = {
+        playerName = '',
+        playerLevel = 1,
+        timePlayed = 0,
+        description = 'save and load',
+        contentFiles = {
+            'builtin.omwscripts',
+            'template.omwgame',
+            'landracer.omwaddon',
+            'the_hub.omwaddon',
+            'test_lua_api.omwscripts',
+        },
+        creationTime = matchers.isAny(),
+    }
+    local expectedAllSaves = {}
+    expectedAllSaves[' - 1'] = directorySaves
+
+    testing.expectThat(menu.getAllSaves(), matchers.equalTo(expectedAllSaves))
+
+    menu.loadGame(' - 1', 'save_and_load.omwsave')
+    coroutine.yield()
+
+    menu.deleteGame(' - 1', 'save_and_load.omwsave')
+    testing.expectThat(menu.getAllSaves(), matchers.equalTo({}))
+end)
+
 local function registerGlobalTest(name, description)
-    testing.registerMenuTest(description or name, function()
-        menu.newGame()
-        coroutine.yield()
-        testing.runGlobalTest(name)
-    end)
+   testing.registerMenuTest(description or name, function()
+       menu.newGame()
+       coroutine.yield()
+       testing.runGlobalTest(name)
+   end)
 end
 
 registerGlobalTest('timers')

scripts/data/integration_tests/testing_util/matchers.lua

@@ -76,4 +76,143 @@ function module.isNotNan()
     end
 end
 
+---
+-- Matcher accepting any value.
+-- @function isAny
+-- @usage
+-- expectThat(value, isAny())
+function module.isAny()
+    return function(actual)
+        return ''
+    end
+end
+
+local function serializeArray(a)
+    local result = nil
+    for _, v in ipairs(a) do
+        if result == nil then
+            result = string.format('{%s', serialize(v))
+        else
+            result = string.format('%s, %s', result, serialize(v))
+        end
+    end
+    if result == nil then
+        return '{}'
+    end
+    return string.format('%s}', result)
+end
+
+local function serializeTable(t)
+    local result = nil
+    for k, v in pairs(t) do
+        if result == nil then
+            result = string.format('{%q = %s', k, serialize(v))
+        else
+            result = string.format('%s, %q = %s', result, k, serialize(v))
+        end
+    end
+    if result == nil then
+        return '{}'
+    end
+    return string.format('%s}', result)
+end
+
+local function isArray(t)
+    local i = 1
+    for _ in pairs(t) do
+        if t[i] == nil then
+            return false
+        end
+        i = i + 1
+    end
+    return true
+end
+
+function serialize(v)
+    local t = type(v)
+    if t == 'string' then
+        return string.format('%q', v)
+    elseif t == 'table' then
+        if isArray(v) then
+            return serializeArray(v)
+        end
+        return serializeTable(v)
+    end
+    return string.format('%s', v)
+end
+
+local function compareScalars(v1, v2)
+    if v1 == v2 then
+        return ''
+    end
+    if type(v1) == 'string' then
+        return string.format('%q ~= %q', v1, v2)
+    end
+    return string.format('%s ~= %s', v1, v2)
+end
+
+local function collectKeys(t)
+    local result = {}
+    for key in pairs(t) do
+        table.insert(result, key)
+    end
+    table.sort(result)
+    return result
+end
+
+local function compareTables(t1, t2)
+    local keys1 = collectKeys(t1)
+    local keys2 = collectKeys(t2)
+    if #keys1 ~= #keys2 then
+        return string.format('table size mismatch: %d ~= %d', #keys1, #keys2)
+    end
+    for i = 1, #keys1 do
+        local key1 = keys1[i]
+        local key2 = keys2[i]
+        if key1 ~= key2 then
+            return string.format('table keys mismatch: %q ~= %q', key1, key2)
+        end
+        local d = compare(t1[key1], t2[key2])
+        if d ~= '' then
+            return string.format('table values mismatch at key %s: %s', serialize(key1), d)
+        end
+    end
+    return ''
+end
+
+function compare(v1, v2)
+    local type1 = type(v1)
+    local type2 = type(v2)
+    if type2 == 'function' then
+        return v2(v1)
+    end
+    if type1 ~= type2 then
+        return string.format('types mismatch: %s ~= %s', type1, type2)
+    end
+    if type1 == 'nil' then
+        return ''
+    elseif type1 == 'table' then
+        return compareTables(v1, v2)
+    elseif type1 == 'nil' or type1 == 'boolean' or type1 == 'number' or type1 == 'string' then
+        return compareScalars(v1, v2)
+    end
+    error('unsupported type: %s', type1)
+end
+
+---
+-- Matcher verifying that given value is equal to expected. Accepts nil, boolean, number, string and table or matcher
+-- function.
+-- @function equalTo
+-- @usage
+-- expectThat({a = {42, 'foo', {b = true}}}, equalTo({a = {42, 'foo', {b = true}}}))
+function module.equalTo(expected)
+    return function(actual)
+        local diff = compare(actual, expected)
+        if diff == '' then
+            return ''
+        end
+        return string.format('%s; actual: %s; expected: %s', diff, serialize(actual, ''), serialize(expected, ''))
+    end
+end
+
 return module