[Tarantool-patches] [RFC PATCH 06/13] lua: positive/negative cases in datetime test

[Timur Safin via Tarantool-patches <tarantool-patches@dev.tarantool.org>]

- extended api of datetime.parse_date, .parse_time, .parse_time_zone
  with the length of parsed (sub)string.
- This allow us to check partially valid strings like "20121224 Foo bar"
  in the updated test app-tap/datetime.test.lua
---
 src/lua/datetime.lua           | 19 ++++-----
 test/app-tap/datetime.test.lua | 78 +++++++++++++++++++++++++++++++++-
 2 files changed, 85 insertions(+), 12 deletions(-)

diff --git a/src/lua/datetime.lua b/src/lua/datetime.lua
index cffa38cd5..670123b1f 100644
--- a/src/lua/datetime.lua
+++ b/src/lua/datetime.lua
@@ -318,7 +318,7 @@ local function datetime_new(o)
             end,
 
             month = function(v)
-                assert(v > 0 and v < 12 )
+                assert(v > 0 and v < 13 )
                 M = v
                 ymd = true
             end,
@@ -393,9 +393,8 @@ end
 
 local function parse_date(str)
     local dt = ffi.new('dt_t[1]')
-    local rc = cdt.dt_parse_iso_date(str, #str, dt)
-    assert(rc > 0)
-    return mk_timestamp(dt[0])
+    local len = cdt.dt_parse_iso_date(str, #str, dt)
+    return len > 0 and mk_timestamp(dt[0]) or nil, tonumber(len)
 end
 
 --[[
@@ -411,9 +410,8 @@ end
 local function parse_time(str)
     local sp = ffi.new('int[1]')
     local fp = ffi.new('int[1]')
-    local rc = cdt.dt_parse_iso_time(str, #str, sp, fp)
-    assert(rc > 0)
-    return mk_timestamp(nil, sp[0], fp[0])
+    local len = cdt.dt_parse_iso_time(str, #str, sp, fp)
+    return len > 0 and mk_timestamp(nil, sp[0], fp[0]) or nil, tonumber(len)
 end
 
 --[[
@@ -424,9 +422,8 @@ end
 ]]
 local function parse_zone(str)
     local offset = ffi.new('int[1]')
-    local rc = cdt.dt_parse_iso_zone(str, #str, offset)
-    assert(rc > 0)
-    return mk_timestamp(nil, nil, nil, offset[0])
+    local len = cdt.dt_parse_iso_zone(str, #str, offset)
+    return len > 0 and mk_timestamp(nil, nil, nil, offset[0]) or nil, tonumber(len)
 end
 
 
@@ -449,7 +446,7 @@ local function parse_str(str)
     str = str:sub(tonumber(n) + 1)
 
     local ch = str:sub(1,1)
-    if ch ~= 't' and ch ~= 'T' and ch ~= ' ' then
+    if ch:match('[Tt ]') == nil then
         return mk_timestamp(dt_)
     end
 
diff --git a/test/app-tap/datetime.test.lua b/test/app-tap/datetime.test.lua
index 914371747..b79450ecc 100755
--- a/test/app-tap/datetime.test.lua
+++ b/test/app-tap/datetime.test.lua
@@ -4,7 +4,7 @@ local tap = require('tap')
 local test = tap.test("errno")
 local date = require('datetime')
 
-test:plan(3)
+test:plan(5)
 
 test:test("Simple tests for parser", function(test)
     test:plan(2)
@@ -112,4 +112,80 @@ test:test("Datetime string formatting", function(test)
     test:ok(date.strftime('%A %d. %B %Y', t) == 'Thursday 01. January 1970', ('%s: strftime #2'):format(str))
 end)
 
+test:test("Parse iso date - valid strings", function(test)
+    test:plan(32)
+    local good = {
+        {2012, 12, 24, "20121224",                   8 },
+        {2012, 12, 24, "20121224  Foo bar",          8 },
+        {2012, 12, 24, "2012-12-24",                10 },
+        {2012, 12, 24, "2012-12-24 23:59:59",       10 },
+        {2012, 12, 24, "2012-12-24T00:00:00+00:00", 10 },
+        {2012, 12, 24, "2012359",                    7 },
+        {2012, 12, 24, "2012359T235959+0130",        7 },
+        {2012, 12, 24, "2012-359",                   8 },
+        {2012, 12, 24, "2012W521",                   8 },
+        {2012, 12, 24, "2012-W52-1",                10 },
+        {2012, 12, 24, "2012Q485",                   8 },
+        {2012, 12, 24, "2012-Q4-85",                10 },
+        {   1,  1,  1, "0001-Q1-01",                10 },
+        {   1,  1,  1, "0001-W01-1",                10 },
+        {   1,  1,  1, "0001-01-01",                10 },
+        {   1,  1,  1, "0001-001",                   8 },
+    }
+
+    for _, value in ipairs(good) do
+        local year, month, day, str, date_part_len;
+        year, month, day, str, date_part_len = unpack(value)
+        local expected_date = date{year = year, month = month, day = day}
+        local date_part, len
+        date_part, len = date.parse_date(str)
+        test:ok(len == date_part_len, ('%s: length check %d'):format(str, len))
+        test:ok(expected_date == date_part, ('%s: expected date'):format(str))
+    end
+end)
+
+test:test("Parse iso date - invalid strings", function(test)
+    test:plan(62)
+    local bad = {
+        "20121232"   , -- Invalid day of month
+        "2012-12-310", -- Invalid day of month
+        "2012-13-24" , -- Invalid month
+        "2012367"    , -- Invalid day of year
+        "2012-000"   , -- Invalid day of year
+        "2012W533"   , -- Invalid week of year
+        "2012-W52-8" , -- Invalid day of week
+        "2012Q495"   , -- Invalid day of quarter
+        "2012-Q5-85" , -- Invalid quarter
+        "20123670"   , -- Trailing digit
+        "201212320"  , -- Trailing digit
+        "2012-12"    , -- Reduced accuracy
+        "2012-Q4"    , -- Reduced accuracy
+        "2012-Q42"   , -- Invalid
+        "2012-Q1-1"  , -- Invalid day of quarter
+        "2012Q--420" , -- Invalid
+        "2012-Q-420" , -- Invalid
+        "2012Q11"    , -- Incomplete
+        "2012Q1234"  , -- Trailing digit
+        "2012W12"    , -- Incomplete
+        "2012W1234"  , -- Trailing digit
+        "2012W-123"  , -- Invalid
+        "2012-W12"   , -- Incomplete
+        "2012-W12-12", -- Trailing digit
+        "2012U1234"  , -- Invalid
+        "2012-1234"  , -- Invalid
+        "2012-X1234" , -- Invalid
+        "0000-Q1-01" , -- Year less than 0001
+        "0000-W01-1" , -- Year less than 0001
+        "0000-01-01" , -- Year less than 0001
+        "0000-001"   , -- Year less than 0001
+    }
+
+    for _, str in ipairs(bad) do
+        local date_part, len
+        date_part, len = date.parse_date(str)
+        test:ok(len == 0, ('%s: length check %d'):format(str, len))
+        test:ok(date_part == nil, ('%s: empty date check %s'):format(str, date_part))
+    end
+end)
+
 os.exit(test:check() and 0 or 1)
-- 
2.29.2