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How to use getSuiteThatUsesEagerLetValueOutsideSpec method of specs.EagerLetSpecs class

Best Spectrum code snippet using specs.EagerLetSpecs.getSuiteThatUsesEagerLetValueOutsideSpec

Source:EagerLetSpecs.java

...121        });122      });123      describe("when trying to use a value outside a spec", () -> {124        final Supplier<Result> result =125            eagerLet(() -> SpectrumHelper.run(getSuiteThatUsesEagerLetValueOutsideSpec()));126        it("causes a failure", () -> {127          assertThat(result.get().getFailureCount(), is(1));128        });129        it("describes the error", () -> {130          final Failure failure = result.get().getFailures().get(0);131          assertThat(failure.getException(), instanceOf(IllegalStateException.class));132          assertThat(failure.getMessage(),133              is("Cannot use the value from eagerLet() in a suite declaration. "134                  + "It may only be used in the context of a running spec."));135        });136      });137      describe("when errors happen in the supplier", () -> {138        describe("checked exceptions", () -> {139          it("should be wrapped in RuntimeException", () -> {140            final Result result = SpectrumHelper.run(getSuiteWithEagerLetThatThrowsCheckedException());141            assertThat(result.getFailures(), hasSize(1));142            final Failure failure = result.getFailures().get(0);143            assertThat(failure.getException(), instanceOf(RuntimeException.class));144            assertThat(failure.getException().getCause(), instanceOf(DummyException.class));145          });146        });147        describe("runtime exceptions", () -> {148          it("should be re-thrown as-is", () -> {149            final Result result = SpectrumHelper.run(getSuiteWithEagerLetThatThrowsRuntimeException());150            assertThat(result.getFailures(), hasSize(1));151            final Failure failure = result.getFailures().get(0);152            assertThat(failure.getException(), instanceOf(DummyRuntimeException.class));153            assertThat(failure.getException().getCause(), is(nullValue()));154          });155        });156        describe("errors", () -> {157          it("should be re-thrown as-is", () -> {158            final Result result = SpectrumHelper.run(getSuiteWithEagerLetThatThrowsError());159            assertThat(result.getFailures(), hasSize(1));160            final Failure failure = result.getFailures().get(0);161            assertThat(failure.getException(), instanceOf(DummyError.class));162            assertThat(failure.getException().getCause(), is(nullValue()));163          });164        });165        describe("custom throwables", () -> {166          it("should be wrapped in RuntimeException", () -> {167            final Result result = SpectrumHelper.run(getSuiteWithEagerLetThatThrowsCustomThrowable());168            assertThat(result.getFailures(), hasSize(1));169            final Failure failure = result.getFailures().get(0);170            assertThat(failure.getException(), instanceOf(RuntimeException.class));171            assertThat(failure.getException().getCause(), instanceOf(DummyThrowable.class));172          });173        });174        describe("state of eager let between specs", () -> {175          it("should not be preserved when a spec has an exception", () -> {176            final Result result = SpectrumHelper.run(getSuiteWithEagerLetAndSpecThatThrowsError());177            assertThat(result.getFailures(), hasSize(1));178            final Failure failure = result.getFailures().get(0);179            assertThat(failure.getException(), instanceOf(RuntimeException.class));180            assertThat(failure.getException().getMessage(), is("Bong!"));181          });182          it("should not be preserved when after has an exception", () -> {183            final Result result = SpectrumHelper.run(getSuiteWithEagerLetAndAfterThatThrowsError());184            assertThat(result.getFailures(), hasSize(2));185            assertThat(result.getFailures().get(0).getMessage(), is("Bong!"));186            assertThat(result.getFailures().get(1).getMessage(), is("Bong!"));187          });188        });189      });190      describe("eager let across multiple threads", () -> {191        final Supplier<List<String>> listSupplier = eagerLet(ArrayList::new);192        it("can share the object with worker thread", () -> {193          // when the supplier's object has something added to it194          listSupplier.get().add("Hello world");195          // used as a box for the integer196          AtomicInteger atomicInteger = new AtomicInteger();197          // when we access the object within a worker thread198          Thread thread = new Thread(() -> atomicInteger.set(listSupplier.get().size()));199          thread.start();200          thread.join();201          // then the worker thread saw the same object as the outer thread202          // then the worker thread saw the same object as the outer thread203          assertThat(atomicInteger.get(), is(1));204        });205      });206    });207  }208  private static Class<?> getSuiteThatUsesEagerLetValueOutsideSpec() {209    class Suite {210      {211        describe("a thing", () -> {212          final Supplier<Integer> value = eagerLet(() -> 1);213          value.get();214          it("does stuff", () -> {215          });216          it("does more stuff", () -> {217          });218        });219      }220    }221    return Suite.class;222  }...

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