From b12e0ba49e10e5a511889acf4b6494d18a324194 Mon Sep 17 00:00:00 2001
From: Felix Morgner <felix.morgner@gmail.com>
Date: Fri, 8 Sep 2023 14:45:54 +0200
Subject: wandac: add tests for the CLI

---
 source/app/wandac/CMakeLists.txt       | 21 ++++++---
 source/tests/CMakeLists.txt            |  1 +
 source/tests/app/wandac/CMakeLists.txt | 11 +++++
 source/tests/app/wandac/src/cli.cpp    | 80 ++++++++++++++++++++++++++++++++++
 4 files changed, 108 insertions(+), 5 deletions(-)
 create mode 100644 source/tests/app/wandac/CMakeLists.txt
 create mode 100644 source/tests/app/wandac/src/cli.cpp

diff --git a/source/app/wandac/CMakeLists.txt b/source/app/wandac/CMakeLists.txt
index 0a70e5b..71aff36 100644
--- a/source/app/wandac/CMakeLists.txt
+++ b/source/app/wandac/CMakeLists.txt
@@ -1,19 +1,30 @@
-add_executable("wandac"
+add_library("${PROJECT_NAME}c-components" OBJECT
   "src/cli.cpp"
   "src/listener.cpp"
-  "src/main.cpp"
 )
 
-target_include_directories("${PROJECT_NAME}c" PRIVATE
+target_include_directories("${PROJECT_NAME}c-components" PUBLIC
   "$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>"
 )
 
-target_link_libraries("${PROJECT_NAME}c" PRIVATE
+target_link_libraries("${PROJECT_NAME}c-components" PUBLIC
   "wanda::control"
   "wanda::proto"
-  "wanda::system"
 
   "bfg::lyra"
+  "Boost::headers"
+)
+
+add_executable("wandac"
+  "src/main.cpp"
+)
+
+
+target_link_libraries("${PROJECT_NAME}c" PRIVATE
+  "${PROJECT_NAME}c-components"
+
+  "wanda::system"
+
   "spdlog::spdlog_header_only"
 )
 
diff --git a/source/tests/CMakeLists.txt b/source/tests/CMakeLists.txt
index 769814c..07b922b 100644
--- a/source/tests/CMakeLists.txt
+++ b/source/tests/CMakeLists.txt
@@ -1,3 +1,4 @@
 include("Catch")
 
+add_subdirectory("app/wandac")
 add_subdirectory("lib/system")
\ No newline at end of file
diff --git a/source/tests/app/wandac/CMakeLists.txt b/source/tests/app/wandac/CMakeLists.txt
new file mode 100644
index 0000000..ab07030
--- /dev/null
+++ b/source/tests/app/wandac/CMakeLists.txt
@@ -0,0 +1,11 @@
+add_executable("wanda-tests-wandac"
+    "src/cli.cpp"
+)
+
+target_link_libraries("wanda-tests-wandac" PRIVATE
+    "${PROJECT_NAME}c-components"
+
+    "Catch2::Catch2WithMain"
+)
+
+catch_discover_tests("wanda-tests-wandac")
\ No newline at end of file
diff --git a/source/tests/app/wandac/src/cli.cpp b/source/tests/app/wandac/src/cli.cpp
new file mode 100644
index 0000000..ed02b4a
--- /dev/null
+++ b/source/tests/app/wandac/src/cli.cpp
@@ -0,0 +1,80 @@
+#include "wandac/cli.hpp"
+
+#include <catch2/catch_all.hpp>
+#include <catch2/catch_test_macros.hpp>
+#include <lyra/args.hpp>
+
+#include <sstream>
+#include <string>
+
+using namespace std::string_literals;
+
+namespace wanda::tests::app::wandac
+{
+
+  template<typename ...Ts>
+  auto make_argument_list(Ts const & ... args) -> lyra::args
+  {
+    return {"wanda"s, static_cast<std::string>(args)...};
+  }
+
+  SCENARIO("Empty argument list parsing", "[app][client][cli]")
+  {
+    GIVEN("A fresh cli instance and error stream")
+    {
+      auto cli = ::wandac::cli{};
+      auto error_stream = std::ostringstream{};
+
+      WHEN("invoking parse without any program arguments")
+      {
+        auto result = cli.parse(make_argument_list(), error_stream);
+
+        THEN("the return value is false") { REQUIRE_FALSE(result); }
+        THEN("the error stream is not empty") { REQUIRE_FALSE(error_stream.view().empty()); }
+        THEN("the help flag is not set") { REQUIRE_FALSE(cli.help); }
+        THEN("the command is empty") { REQUIRE(cli.command.empty()); }
+      }
+    }
+  }
+
+  SCENARIO("Valid argument list parsing", "[app][client][cli]")
+  {
+    GIVEN("A fresh cli instance and error stream")
+    {
+      auto cli = ::wandac::cli{};
+      auto error_stream = std::ostringstream{};
+
+      AND_GIVEN("'-h' in the argument list")
+      {
+        auto argument_list = make_argument_list("-h");
+
+        WHEN("invoking parse without additional arguments")
+        {
+          auto result = cli.parse(argument_list, error_stream);
+
+          THEN("the return value is true") { REQUIRE(result); }
+          THEN("the error stream is empty") { REQUIRE(error_stream.view().empty()); }
+          THEN("the help flag is set") { REQUIRE(cli.help); }
+          THEN("the command is empty") { REQUIRE(cli.command.empty()); }
+        }
+      }
+
+      AND_GIVEN("'change' in the argument list")
+      {
+        auto argument_list = make_argument_list("change");
+
+        WHEN("invoking parse without additional arguments")
+        {
+          auto result = cli.parse(argument_list, error_stream);
+
+          THEN("the return valis is true") { REQUIRE(result); }
+          THEN("the error stream is empty") { REQUIRE(error_stream.view().empty()); }
+          THEN("the help flag is not set") { REQUIRE_FALSE(cli.help); }
+          THEN("the command is not empty") { REQUIRE_FALSE(cli.command.empty()); }
+          THEN("the command is 'change'") { REQUIRE(cli.command == "change"); }
+        }
+      }
+    }
+  }
+
+}  // namespace wanda::tests::app::wandac
-- 
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