Move tests from projects/ to tests/

tests/SelfTest/IntrospectiveTests/String.tests.cpp

@@ -0,0 +1,150 @@
+#include <catch2/catch_stringref.h>
+
+#include <catch2/catch.hpp>
+
+#include <cstring>
+
+TEST_CASE( "StringRef", "[Strings][StringRef]" ) {
+
+    using Catch::StringRef;
+
+    SECTION( "Empty string" ) {
+        StringRef empty;
+        REQUIRE( empty.empty() );
+        REQUIRE( empty.size() == 0 );
+        REQUIRE( empty.isNullTerminated() );
+        REQUIRE( std::strcmp( empty.c_str(), "" ) == 0 );
+    }
+
+    SECTION( "From string literal" ) {
+        StringRef s = "hello";
+        REQUIRE( s.empty() == false );
+        REQUIRE( s.size() == 5 );
+        REQUIRE( s.isNullTerminated() );
+
+        auto rawChars = s.data();
+        REQUIRE( std::strcmp( rawChars, "hello" ) == 0 );
+
+        REQUIRE_NOTHROW(s.c_str());
+        REQUIRE(s.c_str() == rawChars);
+        REQUIRE(s.data() == rawChars);
+    }
+    SECTION( "From sub-string" ) {
+        StringRef original = StringRef( "original string" ).substr(0, 8);
+        REQUIRE( original == "original" );
+
+        REQUIRE_FALSE(original.isNullTerminated());
+        REQUIRE_THROWS(original.c_str());
+        REQUIRE_NOTHROW(original.data());
+    }
+
+
+    SECTION( "Substrings" ) {
+        StringRef s = "hello world!";
+        StringRef ss = s.substr(0, 5);
+
+        SECTION( "zero-based substring" ) {
+            REQUIRE( ss.empty() == false );
+            REQUIRE( ss.size() == 5 );
+            REQUIRE( std::strncmp( ss.data(), "hello", 5 ) == 0 );
+            REQUIRE( ss == "hello" );
+        }
+
+        SECTION( "non-zero-based substring") {
+            ss = s.substr( 6, 6 );
+            REQUIRE( ss.size() == 6 );
+            REQUIRE( std::strcmp( ss.c_str(), "world!" ) == 0 );
+        }
+
+        SECTION( "Pointer values of full refs should match" ) {
+            StringRef s2 = s;
+            REQUIRE( s.data() == s2.data() );
+        }
+
+        SECTION( "Pointer values of substring refs should also match" ) {
+            REQUIRE( s.data() == ss.data() );
+        }
+
+        SECTION("Past the end substring") {
+            REQUIRE(s.substr(s.size() + 1, 123).empty());
+        }
+
+        SECTION("Substring off the end are trimmed") {
+            ss = s.substr(6, 123);
+            REQUIRE(std::strcmp(ss.c_str(), "world!") == 0);
+        }
+        // TODO: substring into string + size is longer than end
+    }
+
+    SECTION( "Comparisons are deep" ) {
+        char buffer1[] = "Hello";
+        char buffer2[] = "Hello";
+        CHECK((char*)buffer1 != (char*)buffer2);
+
+        StringRef left(buffer1), right(buffer2);
+        REQUIRE( left == right );
+        REQUIRE(left != left.substr(0, 3));
+    }
+
+    SECTION( "from std::string" ) {
+        std::string stdStr = "a standard string";
+
+        SECTION( "implicitly constructed" ) {
+            StringRef sr = stdStr;
+            REQUIRE( sr == "a standard string" );
+            REQUIRE( sr.size() == stdStr.size() );
+        }
+        SECTION( "explicitly constructed" ) {
+            StringRef sr( stdStr );
+            REQUIRE( sr == "a standard string" );
+            REQUIRE( sr.size() == stdStr.size() );
+        }
+        SECTION( "assigned" ) {
+            StringRef sr;
+            sr = stdStr;
+            REQUIRE( sr == "a standard string" );
+            REQUIRE( sr.size() == stdStr.size() );
+        }
+    }
+
+    SECTION( "to std::string" ) {
+        StringRef sr = "a stringref";
+
+        SECTION( "explicitly constructed" ) {
+            std::string stdStr( sr );
+            REQUIRE( stdStr == "a stringref" );
+            REQUIRE( stdStr.size() == sr.size() );
+        }
+        SECTION( "assigned" ) {
+            std::string stdStr;
+            stdStr = static_cast<std::string>(sr);
+            REQUIRE( stdStr == "a stringref" );
+            REQUIRE( stdStr.size() == sr.size() );
+        }
+    }
+}
+
+TEST_CASE("StringRef at compilation time", "[Strings][StringRef][constexpr]") {
+    using Catch::StringRef;
+    SECTION("Simple constructors") {
+        STATIC_REQUIRE(StringRef{}.size() == 0);
+
+        STATIC_REQUIRE(StringRef{ "abc", 3 }.size() == 3);
+        STATIC_REQUIRE(StringRef{ "abc", 3 }.isNullTerminated());
+
+        STATIC_REQUIRE(StringRef{ "abc", 2 }.size() == 2);
+        STATIC_REQUIRE_FALSE(StringRef{ "abc", 2 }.isNullTerminated());
+    }
+    SECTION("UDL construction") {
+        constexpr auto sr1 = "abc"_catch_sr;
+        STATIC_REQUIRE_FALSE(sr1.empty());
+        STATIC_REQUIRE(sr1.size() == 3);
+        STATIC_REQUIRE(sr1.isNullTerminated());
+
+        using Catch::operator"" _sr;
+        constexpr auto sr2 = ""_sr;
+        STATIC_REQUIRE(sr2.empty());
+        STATIC_REQUIRE(sr2.size() == 0);
+        STATIC_REQUIRE(sr2.isNullTerminated());
+    }
+}