Added string classes

projects/SelfTest/StringBuilder.tests.cpp

@@ -0,0 +1,76 @@
+#include "internal/catch_stringbuilder.h"
+#include "../include/internal/catch_stringref.h"
+#include "../include/internal/catch_string.h"
+
+#include "catch.hpp"
+
+TEST_CASE( "StringBuilder", "[Strings]" ) {
+    
+    using Catch::StringBuilder;
+    using Catch::String;
+    
+    StringBuilder sb;
+    
+    SECTION( "basic" ) {
+        REQUIRE( sb.capacity() == 0 );
+        REQUIRE( sb.size() == 0 );
+
+        sb.reserve( 32 );
+        REQUIRE( sb.capacity() == 32 );
+        REQUIRE( sb.size() == 0 );
+        
+        sb.append( "hello" );
+        REQUIRE( sb.capacity() == 32 );
+        REQUIRE( sb.size() == 5 );
+        
+        String s = std::move( sb );
+        REQUIRE( s == "hello" );
+        REQUIRE( s.size() == 5 );
+    }
+    
+    SECTION( "concatenation" ) {
+        sb << "hello" << " " << "world";
+        String s = std::move( sb );
+        REQUIRE( s == "hello world" );
+    }
+
+    SECTION( "concat & move" ) {
+        String s = StringBuilder() << "hello" << " " << "world";
+        REQUIRE( s == "hello world" );
+    }
+
+    SECTION( "reserved" ) {
+        StringBuilder sb16( 16 );
+        REQUIRE( sb16.capacity() == 16 );
+        sb16 << "hello" << " " << "world";
+        REQUIRE( sb16.capacity() == 16 );
+        String s = std::move( sb16 );
+        REQUIRE( s == "hello world" );
+    }
+
+    SECTION( "from String" ) {
+        String s = "hello";
+
+        SECTION( "copy" ) {
+            StringBuilder sb2 = s;
+            String s2( std::move(sb2) );
+            REQUIRE( s2 == s );
+            REQUIRE( s2.c_str() != s.c_str() );
+        }
+        SECTION( "move from uniquely owned string" ) {
+            auto originalPointer = s.c_str();
+            StringBuilder sb2( std::move( s ) );
+            String s2( std::move(sb2) );
+            REQUIRE( s2 == "hello" );
+            REQUIRE( s2.c_str() == originalPointer );
+        }
+        SECTION( "move from shared string (copies)" ) {
+            auto originalPointer = s.c_str();
+            String keepAlive = s;
+            StringBuilder sb2( std::move( s ) );
+            String s2( std::move(sb2) );
+            REQUIRE( s2 == "hello" );
+            REQUIRE( s2.c_str() != originalPointer );
+        }
+    }
+}