Initial circuits plugin work.

plugins/circuits/test/CMakeLists.txt

@@ -0,0 +1,9 @@
+set(PLUGIN_NAME circuits)
+
+list(APPEND UNIT_TEST_FILES
+	TestElectronicCircuit.cpp
+)
+
+add_executable(${PLUGIN_NAME}_unit_tests ${CMAKE_SOURCE_DIR}/test/test_runner.cpp ${UNIT_TEST_FILES})
+target_link_libraries(${PLUGIN_NAME}_unit_tests PUBLIC test_utils circuits)
+set_property(TARGET ${PLUGIN_NAME}_unit_tests PROPERTY FOLDER plugins)

plugins/circuits/test/TestElectronicCircuit.cpp

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+#include "TestFramework.h"
+#include "TestUtils.h"
+#include "TestRenderUtils.h"
+
+#include "ElectronicCircuit.h"
+#include "ElectronicCircuitNode.h"
+
+#include "BasicLogicGates.h"
+
+TEST_CASE(TestElectronicCircuit, "circuits")
+{
+    TestRenderer renderer(100, 100);
+
+    auto circuit = std::make_unique<ElectronicCircuit>();
+
+    // Add three labelled terminals (two in, one out)
+    auto input0 = std::make_unique<Terminal>(Terminal::TerminalType::INPUT, "p");
+    auto input1 = std::make_unique<Terminal>(Terminal::TerminalType::INPUT, "q");
+    auto input2 = std::make_unique<Terminal>(Terminal::TerminalType::INPUT, "r");
+
+    auto output = std::make_unique<Terminal>(Terminal::TerminalType::OUTPUT, "s");
+
+    // Add gates
+    auto and_gate = std::make_unique<AndLogicGate>();
+    auto or_gate = std::make_unique<OrLogicGate>();
+
+    // Add wires
+    auto wire0 = std::make_unique<Wire>(input0.get(), and_gate.get());
+    auto wire1 = std::make_unique<Wire>(input1.get(), and_gate.get());
+
+    auto wire2 = std::make_unique<Wire>(and_gate.get(), or_gate.get());
+    auto wire3 = std::make_unique<Wire>(input2.get(), or_gate.get());
+
+    auto wire4 = std::make_unique<Wire>(or_gate.get(), output.get());
+
+    // Join wires
+    and_gate->setInput0(wire0.get());
+    and_gate->setInput1(wire1.get());
+    and_gate->setOutput(wire2.get());
+
+    or_gate->setInput0(wire2.get());
+    or_gate->setInput1(wire3.get());
+    or_gate->setOutput(wire4.get());
+
+    input0->setConnection(wire0.get());
+    input1->setConnection(wire1.get());
+    input2->setConnection(wire3.get());
+    output->setConnection(wire4.get());
+
+    // Add to circuit
+    circuit->addWire(std::move(wire0));
+    circuit->addWire(std::move(wire1));
+    circuit->addWire(std::move(wire2));
+    circuit->addWire(std::move(wire3));
+
+    circuit->addInputTerminal(std::move(input0));
+    circuit->addInputTerminal(std::move(input1));
+    circuit->addInputTerminal(std::move(input2));
+
+    circuit->addOutputTerminal(std::move(output));
+    
+    circuit->addLogicGate(std::move(and_gate));
+    circuit->addLogicGate(std::move(or_gate));
+    
+    auto circuit_node = std::make_unique<ElectronicCircuitNode>(Transform());
+
+    circuit_node->setContent(circuit.get());
+
+    renderer.getScene()->addNode(circuit_node.get());
+    renderer.writeSvg(TestUtils::getTestOutputDir(__FILE__) / "circuit.svg");
+}