[TEST] Add error unit-test

- ADD busted, luaunit unit-test

Author: devjun10

basic/error/test_busted.lua

@@ -0,0 +1,57 @@
+describe("Error module tests", function()
+    local M = require("main")
+
+    it("should divide safely without error", function()
+        local result, err = M.divideSafely(10, 2)
+        assert.are.equal(result, 5)
+        assert.is_nil(err)
+    end)
+
+    it("should handle division by zero safely", function()
+        local result, err = M.divideSafely(10, 0)
+        assert.is_nil(result)
+        assert.are.equal(err, "Division by zero")
+    end)
+
+    it("should divide using assert", function()
+        local result = M.divideWithAssert(10, 2)
+        assert.are.equal(result, 5)
+    end)
+
+    it("should raise error on division by zero with assert", function()
+        assert.has_error(function()
+            M.divideWithAssert(10, 0)
+        end, "Division by zero")
+    end)
+
+    it("should divide with pcall successfully", function()
+        local result = M.divideWithPCall(10, 2)
+        assert.are.equal(result, 5)
+    end)
+
+    it("should catch division by zero with pcall", function()
+        local result = M.divideWithPCall(10, 0)
+        assert.are.equal(result:match("Division by zero"), "Division by zero")
+    end)
+
+    it("should divide with xpcall successfully", function()
+        local result = M.divideWithXPCall(10, 2)
+        assert.are.equal(result, 5)
+    end)
+
+    it("should handle division by zero with custom error handler in xpcall", function()
+        local result = M.divideWithXPCall(10, 0)
+        assert.are.equal(result.message:match("Division by zero"), "Division by zero")
+        assert.are.equal(result.code, 400)
+    end)
+
+    it("should divide with coroutine successfully", function()
+        local result = M.divideWithCoroutine(10, 2)
+        assert.are.equal(result, 5)
+    end)
+
+    it("should handle division by zero with coroutine", function()
+        local result = M.divideWithCoroutine(10, 0)
+        assert.are.equal(result, "Division by zero")
+    end)
+end)

basic/error/test_luaunit.lua

@@ -0,0 +1,45 @@
+local luaunit = require("luaunit")
+local main = require("main")
+
+TestDivision = {}
+
+function TestDivision:testDivideSafely()
+    local result, err = main.divideSafely(10, 2)
+    luaunit.assertEquals(result, 5)
+    luaunit.assertIsNil(err)
+
+    result, err = main.divideSafely(10, 0)
+    luaunit.assertIsNil(result)
+    luaunit.assertEquals(err, "Division by zero")
+end
+
+function TestDivision:testDivisionByZeroPCall()
+    local result = main.divideWithPCall(10, 2)
+    luaunit.assertEquals(result, 5)
+
+    result = main.divideWithPCall(10, 0)
+    luaunit.assertStrContains(result, "Division by zero")
+end
+
+function TestDivision:testDivisionByZeroAndErrorHandler()
+    local result = main.divideWithXPCall(10, 0)
+    luaunit.assertStrContains(result.message, "Division by zero")
+    luaunit.assertEquals(result.code, 400)
+end
+
+function TestDivision:testDivisionWithAssert()
+    local result = main.divideWithAssert(10, 2)
+    luaunit.assertEquals(result, 5)
+
+    luaunit.assertErrorMsgContains("Division by zero", main.divideWithAssert, 10, 0)
+end
+
+function TestDivision:testDivisionWithCoroutine()
+    local result = main.divideWithCoroutine(10, 2)
+    luaunit.assertEquals(result, 5)
+
+    result = main.divideWithCoroutine(10, 0)
+    luaunit.assertStrContains(result, "Division by zero")
+end
+
+os.exit(luaunit.LuaUnit.run())