[Test] Add some unit tests

diff --git a/test/lua/unit/hash.lua b/test/lua/unit/hash.lua
new file mode 100644 (file)
index 0000000..4e632e8
--- /dev/null
+++ b/test/lua/unit/hash.lua
@@ -0,0 +1,176 @@
+local hash = require 'rspamd_cryptobox_hash'
+
+context("Cryptobox hash tests", function()
+
+  local function hash_value(value)
+    local h = hash.create()
+    h:update(value)
+    return h:hex()
+  end
+
+  local function compare_hashes(val1, val2)
+    return hash_value(val1) == hash_value(val2)
+  end
+
+  context("Basic type hashing", function()
+    test("Handles strings", function()
+      local h1 = hash_value("test")
+      local h2 = hash_value("test")
+      assert_equal(h1, h2, "Same strings should hash to same value")
+
+      assert_not_equal(hash_value("test"), hash_value("test2"),
+          "Different strings should hash differently")
+    end)
+
+    test("Handles numbers", function()
+      -- Integer tests
+      assert_equal(hash_value(123), hash_value(123))
+      assert_not_equal(hash_value(123), hash_value(124))
+
+      -- Float tests
+      assert_equal(hash_value(123.45), hash_value(123.45))
+      assert_not_equal(hash_value(123.45), hash_value(123.46))
+
+      -- Different number types should hash differently
+      assert_not_equal(hash_value(123), hash_value(123.1))
+    end)
+
+    test("Handles booleans", function()
+      assert_equal(hash_value(true), hash_value(true))
+      assert_equal(hash_value(false), hash_value(false))
+      assert_not_equal(hash_value(true), hash_value(false))
+    end)
+
+    test("Handles nil", function()
+      local h1 = hash.create()
+      local h2 = hash.create()
+      h1:update(nil)
+      h2:update(nil)
+      assert_equal(h1:hex(), h2:hex())
+    end)
+  end)
+
+  context("Table hashing", function()
+    test("Handles array tables", function()
+      assert_equal(hash_value({ 1, 2, 3 }), hash_value({ 1, 2, 3 }))
+      assert_not_equal(hash_value({ 1, 2, 3 }), hash_value({ 1, 2, 4 }))
+      assert_not_equal(hash_value({ 1, 2, 3 }), hash_value({ 1, 2 }))
+    end)
+
+    test("Handles key-value tables", function()
+      assert_equal(
+          hash_value({ foo = "bar", baz = 123 }),
+          hash_value({ foo = "bar", baz = 123 })
+      )
+      assert_not_equal(
+          hash_value({ foo = "bar" }),
+          hash_value({ foo = "baz" })
+      )
+    end)
+
+    test("Handles mixed tables", function()
+      assert_equal(
+          hash_value({ 1, 2, foo = "bar" }),
+          hash_value({ 1, 2, foo = "bar" })
+      )
+      assert_not_equal(
+          hash_value({ 1, 2, foo = "bar" }),
+          hash_value({ 1, 2, foo = "baz" })
+      )
+    end)
+
+    test("Handles nested tables", function()
+      assert_equal(
+          hash_value({ 1, { 2, 3 }, foo = { bar = "baz" } }),
+          hash_value({ 1, { 2, 3 }, foo = { bar = "baz" } })
+      )
+      assert_not_equal(
+          hash_value({ 1, { 2, 3 } }),
+          hash_value({ 1, { 2, 4 } })
+      )
+    end)
+  end)
+
+  context("Complex scenarios", function()
+    test("Handles multiple updates", function()
+      local h1 = hash.create()
+      h1:update("test")
+      h1:update(123)
+      h1:update({ foo = "bar" })
+
+      local h2 = hash.create()
+      h2:update("test")
+      h2:update(123)
+      h2:update({ foo = "bar" })
+
+      assert_equal(h1:hex(), h2:hex())
+    end)
+
+    test("Order matters for updates", function()
+      local h1 = hash.create()
+      h1:update("a")
+      h1:update("b")
+
+      local h2 = hash.create()
+      h2:update("b")
+      h2:update("a")
+
+      assert_not_equal(h1:hex(), h2:hex())
+    end)
+
+    test("Handles all types together", function()
+      local complex = {
+        str = "test",
+        num = 123,
+        float = 123.45,
+        bool = true,
+        arr = { 1, 2, 3 },
+        nested = {
+          foo = {
+            bar = "baz"
+          }
+        }
+      }
+
+      assert_equal(hash_value(complex), hash_value(complex))
+    end)
+  end)
+
+  context("Error conditions", function()
+    test("Prevents update after finalization", function()
+      local h = hash.create()
+      h:update("test")
+      local _ = h:hex() -- finalize
+      assert_error(function()
+        h:update("more")
+      end)
+    end)
+
+    test("Handles function values", function()
+      local h = hash.create()
+      local f = function()
+      end
+      assert_not_error(function()
+        h:update(f)
+      end)
+    end)
+  end)
+
+  context("Determinism tests", function()
+    test("Same input always produces same hash", function()
+      local inputs = {
+        "test string",
+        123,
+        true,
+        { 1, 2, 3 },
+        { foo = "bar", nested = { 1, 2, 3 } },
+      }
+
+      for _, input in ipairs(inputs) do
+        local h1 = hash_value(input)
+        local h2 = hash_value(input)
+        assert_equal(h1, h2, "Hash should be deterministic for: " .. type(input))
+      end
+    end)
+  end)
+end)
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