Task: Add tests for LiveDebugger.Utils.Parsers (#336)

* add spec

* add tests

Author: GuzekAlan

lib/live_debugger/utils/parsers.ex

@@ -18,6 +18,7 @@ defmodule LiveDebugger.Utils.Parsers do
     end
   end
 
+  @spec parse_elapsed_time(non_neg_integer()) :: String.t()
   def parse_elapsed_time(microseconds) do
     cond do
       microseconds < 1_000 -> "#{microseconds} µs"

test/utils/parsers_test.exs

@@ -0,0 +1,67 @@
+defmodule LiveDebugger.Utils.ParsersTest do
+  use ExUnit.Case, async: true
+
+  alias LiveDebugger.Utils.Parsers
+
+  describe "parse_timestamp/1" do
+    test "parses a valid timestamp" do
+      timestamp = 1_000_000
+      assert Parsers.parse_timestamp(timestamp) == "00:00:01.000000"
+    end
+
+    test "returns \"Invalid timestamp\" when timestamp is invalid" do
+      timestamp = 109_201_930_129_391_238_012_983_091_283_712_097_380_127
+      assert Parsers.parse_timestamp(timestamp) == "Invalid timestamp"
+    end
+  end
+
+  describe "parse_elapsed_time/1" do
+    test "parses microseconds for less than 1ms" do
+      assert Parsers.parse_elapsed_time(500) == "500 µs"
+    end
+
+    test "parses milliseconds" do
+      assert Parsers.parse_elapsed_time(1_500) == "1 ms"
+    end
+
+    test "parses seconds" do
+      assert Parsers.parse_elapsed_time(1_500_000) == "1.50 s"
+    end
+  end
+
+  test "pid_to_string/1 converts pid to string" do
+    pid = :c.pid(0, 123, 0)
+    assert Parsers.pid_to_string(pid) == "0.123.0"
+  end
+
+  describe "string_to_pid/1" do
+    test "converts string to pid" do
+      pid = :c.pid(0, 123, 0)
+      assert {:ok, ^pid} = Parsers.string_to_pid("0.123.0")
+    end
+
+    test "returns :error for invalid string" do
+      assert Parsers.string_to_pid("invalid") == :error
+    end
+  end
+
+  test "cid_to_string/1 converts cid to string" do
+    cid = %Phoenix.LiveComponent.CID{cid: 123}
+    assert Parsers.cid_to_string(cid) == "123"
+  end
+
+  describe "string_to_cid/1" do
+    test "converts string to cid" do
+      cid = %Phoenix.LiveComponent.CID{cid: 123}
+      assert {:ok, ^cid} = Parsers.string_to_cid("123")
+    end
+
+    test "returns :error for invalid string" do
+      assert Parsers.string_to_cid("invalid") == :error
+    end
+  end
+
+  test "module_to_string/1 converts module to string" do
+    assert Parsers.module_to_string(LiveDebuggerTest.TestView) == "LiveDebuggerTest.TestView"
+  end
+end