def defaultToolChain3 = availableToolChain("test3")

        when:
        registry.registerDefaultToolChain("test1", TestNativeToolChain)
        registry.registerDefaultToolChain("test2", TestNativeToolChain)
        registry.registerDefaultToolChain("test3", TestNativeToolChain)
        registry.addDefaultToolChains()

        then:

    /**
     * Registers a default ToolChain, which may later be added to the registry via {@link #addDefaultToolChains()}.
     */
    void registerDefaultToolChain(String name, Class<? extends NativeToolChain> type);

    /**
     * Adds default tool chains to the registry.
     */
    void addDefaultToolChains();

    /**

                }
            });
            toolChainRegistry.registerDefaultToolChain(ClangToolChain.DEFAULT_NAME, Clang.class);
        }

    }

                }
            });
            toolChainRegistry.registerDefaultToolChain(SwiftcToolChain.DEFAULT_NAME, Swiftc.class);
        }

    }

                }
            });
            toolChainRegistry.registerDefaultToolChain(GccToolChain.DEFAULT_NAME, Gcc.class);
        }

    }

                }
            });
            toolChainRegistry.registerDefaultToolChain(VisualCppToolChain.DEFAULT_NAME, VisualCpp.class);
        }

    }

        throw new InvalidUserDataException(String.format("ToolChain with name '%s' added multiple times", toolChain.getName()));
    }

    @Override
    public void registerDefaultToolChain(String name, Class<? extends NativeToolChain> type) {
        registeredDefaults.put(name, type);
    }

    @Override
    public void addDefaultToolChains() {