Implement operator_subtract

Author: adazem009

src/dev/blocks/operatorblocks.cpp

@@ -20,9 +20,15 @@ std::string OperatorBlocks::description() const
 void OperatorBlocks::registerBlocks(IEngine *engine)
 {
     engine->addCompileFunction(this, "operator_add", &compileAdd);
+    engine->addCompileFunction(this, "operator_subtract", &compileSubtract);
 }
 
 CompilerValue *OperatorBlocks::compileAdd(Compiler *compiler)
 {
     return compiler->createAdd(compiler->addInput("NUM1"), compiler->addInput("NUM2"));
 }
+
+CompilerValue *OperatorBlocks::compileSubtract(Compiler *compiler)
+{
+    return compiler->createSub(compiler->addInput("NUM1"), compiler->addInput("NUM2"));
+}

test/dev/blocks/operator_blocks_test.cpp

@@ -45,3 +45,22 @@ TEST_F(OperatorBlocksTest, Add)
     ASSERT_EQ(valueList->size(), 1);
     ASSERT_EQ(Value(values[0]), 8.2);
 }
+
+TEST_F(OperatorBlocksTest, Subtract)
+{
+    auto target = std::make_shared<Sprite>();
+    ScriptBuilder builder(m_extension.get(), m_engine, target);
+
+    builder.addBlock("operator_subtract");
+    builder.addValueInput("NUM1", 5.7);
+    builder.addValueInput("NUM2", 2.5);
+    builder.captureBlockReturnValue();
+
+    builder.build();
+    builder.run();
+
+    List *valueList = builder.capturedValues();
+    ValueData *values = valueList->data();
+    ASSERT_EQ(valueList->size(), 1);
+    ASSERT_EQ(Value(values[0]), 3.2);
+}