Add CMake change and tests

Tests/Utilities/CMakeLists.txt

@@ -2,6 +2,7 @@ set(TEST_SOURCES
  TestSed.cpp
  TestPatch.cpp
  TestUniq.cpp
+ TestCat.cpp
 )
 
 foreach(source IN LISTS TEST_SOURCES)

Tests/Utilities/TestCat.cpp

@@ -0,0 +1,86 @@
+/*
+ * Copyright (c) 2023, Rodrigo Tobar <[email protected]>.
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <AK/ScopeGuard.h>
+#include <AK/StringView.h>
+#include <LibCore/Command.h>
+#include <LibCore/File.h>
+#include <LibTest/Macros.h>
+#include <LibTest/TestCase.h>
+
+static void run_cat(Vector<char const*>&& arguments, StringView standard_input, StringView expected_stdout)
+{
+ MUST(arguments.try_insert(0, "cat"));
+ MUST(arguments.try_append(nullptr));
+ auto cat = MUST(Core::Command::create("cat"sv, arguments.data()));
+ MUST(cat->write(standard_input));
+ auto [stdout, stderr] = MUST(cat->read_all());
+ auto status = MUST(cat->status());
+ if (status != Core::Command::ProcessResult::DoneWithZeroExitCode) {
+ FAIL(ByteString::formatted("cat didn't exit cleanly: status: {}, stdout:{}, stderr: {}", static_cast<int>(status), StringView { stdout.bytes() }, StringView { stderr.bytes() }));
+ }
+
+ // // Print out stdout as raw bytes
+ // out("Raw stdout : "sv);
+ // for (auto& c : StringView { stdout.bytes() }) {
+ // out("{:02x} "sv, c);
+ // }
+ // out("\n"sv);
+ //
+ // // Print out stdout as raw bytes
+ // out("Raw expected stdout: "sv);
+ // for (auto& c : StringView { expected_stdout.bytes() }) {
+ // out("{:02x} "sv, c);
+ // }
+ // out("\n"sv);
+
+ // // Convert stdout to a stringview and print it out
+ // out("stdout:\n"sv);
+ // for (char c : StringView(stdout)) {
+ // if (c == '\t') {
+ // out("\\t"sv);
+ // } else if (c == '\n') {
+ // out("\\n"sv);
+ // } else {
+ // out("{}", StringView { &c, 1 });
+ // }
+ // }
+ // out("\n\n"sv);
+ //
+ // out("Expected stdout:\n"sv);
+ // for (char c : expected_stdout) {
+ // if (c == '\t') {
+ // out("\\t"sv);
+ // } else if (c == '\n') {
+ // out("\\n"sv);
+ // } else {
+ // out("{}", StringView { &c, 1 });
+ // }
+ // }
+ // out("\n"sv);
+
+ EXPECT_EQ(StringView { expected_stdout.bytes() }, StringView { stdout.bytes() });
+}
+
+TEST_CASE(show_lines)
+{
+ run_cat({ "-n" }, "hello"sv, " 1\thello"sv);
+ run_cat({ "-n" }, "hello\nworld"sv, " 1\thello\n 2\tworld"sv);
+ run_cat({ "-n" }, "hello\n\nworld"sv, " 1\thello\n 2\t\n 3\tworld"sv);
+ run_cat({ "-n" }, "\nhello"sv, " 1\t\n 2\thello"sv);
+ run_cat({ "-n" }, "hello\n"sv, " 1\thello\n"sv);
+ run_cat({ "-n" }, "hello\n\n"sv, " 1\thello\n 2\t\n"sv);
+}
+
+TEST_CASE(show_only_non_blank_lines)
+{
+ run_cat({ "-b" }, "hello"sv, " 1\thello"sv);
+ run_cat({ "-b" }, "hello\nworld"sv, " 1\thello\n 2\tworld"sv);
+ run_cat({ "-b" }, "hello\n\nworld"sv, " 1\thello\n\n 2\tworld"sv);
+ run_cat({ "-b" }, "\nhello"sv, "\n 1\thello"sv);
+ run_cat({ "-b" }, "hello\n"sv, " 1\thello\n"sv);
+ run_cat({ "-b" }, "hello\n\n"sv, " 1\thello\n\n"sv);
+}