From b8bd64913bc0ca36d94e8388ac1e0b9fefac6a00 Mon Sep 17 00:00:00 2001
From: Merith-TK <merith.tk@gmail.com>
Date: Mon, 22 Feb 2021 01:02:56 -0800
Subject: [PATCH] Add date-specific MOTDs (like Minecraft) (CCT#533)

---
 .../computercraft/lua/rom/programs/motd.lua   | 29 +++++++++------
 .../test-rom/spec/programs/motd_spec.lua      | 36 +++++++++++++++++++
 2 files changed, 55 insertions(+), 10 deletions(-)
 create mode 100644 src/test/resources/test-rom/spec/programs/motd_spec.lua

diff --git a/src/main/resources/data/computercraft/lua/rom/programs/motd.lua b/src/main/resources/data/computercraft/lua/rom/programs/motd.lua
index c8c75a40b..57ab7b916 100644
--- a/src/main/resources/data/computercraft/lua/rom/programs/motd.lua
+++ b/src/main/resources/data/computercraft/lua/rom/programs/motd.lua
@@ -1,15 +1,24 @@
-local tMotd = {}
+local date = os.date("*t")
+if date.month == 1 and date.day == 1 then
+    print("Happy new year!")
+elseif date.month == 12 and date.day == 24 then
+    print("Merry X-mas!")
+elseif date.month == 10 and date.day == 31 then
+    print("OOoooOOOoooo! Spooky!")
+else
+    local tMotd = {}
 
-for sPath in string.gmatch(settings.get("motd.path"), "[^:]+") do
-    if fs.exists(sPath) then
-        for sLine in io.lines(sPath) do
-            table.insert(tMotd, sLine)
+    for sPath in string.gmatch(settings.get("motd.path"), "[^:]+") do
+        if fs.exists(sPath) then
+            for sLine in io.lines(sPath) do
+                table.insert(tMotd, sLine)
+            end
         end
     end
-end
 
-if #tMotd == 0 then
-    print("missingno")
-else
-    print(tMotd[math.random(1, #tMotd)])
+    if #tMotd == 0 then
+        print("missingno")
+    else
+        print(tMotd[math.random(1, #tMotd)])
+    end
 end
diff --git a/src/test/resources/test-rom/spec/programs/motd_spec.lua b/src/test/resources/test-rom/spec/programs/motd_spec.lua
new file mode 100644
index 000000000..d426fb6e7
--- /dev/null
+++ b/src/test/resources/test-rom/spec/programs/motd_spec.lua
@@ -0,0 +1,36 @@
+local capture = require "test_helpers".capture_program
+
+describe("The motd program", function()
+    local function setup_date(month, day)
+        stub(os, "date", function() return { month = month, day = day } end)
+    end
+
+    it("displays MOTD", function()
+        setup_date(0, 0)
+        local file = fs.open("/motd_check.txt", "w")
+        file.write("Hello World!")
+        file.close()
+        settings.set("motd.path", "/motd_check.txt")
+
+        expect(capture(stub, "motd"))
+            :matches { ok = true, output = "Hello World!\n", error = "" }
+    end)
+
+    it("displays date-specific MOTD (1/1)", function()
+        setup_date(1, 1)
+        expect(capture(stub, "motd"))
+            :matches { ok = true, output = "Happy new year!\n", error = "" }
+    end)
+
+    it("displays date-specific MOTD (10/31)", function()
+        setup_date(10, 31)
+        expect(capture(stub, "motd"))
+            :matches { ok = true, output = "OOoooOOOoooo! Spooky!\n", error = "" }
+    end)
+
+    it("displays date-specific MOTD (12/24)", function()
+        setup_date(12, 24)
+        expect(capture(stub, "motd"))
+            :matches { ok = true, output = "Merry X-mas!\n", error = "" }
+    end)
+end)