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How to use LetHook method of com.greghaskins.spectrum.internal.hooks.LetHook class

Best Spectrum code snippet using com.greghaskins.spectrum.internal.hooks.LetHook.LetHook

Source:Specification.java

...9import com.greghaskins.spectrum.ThrowingSupplier;10import com.greghaskins.spectrum.internal.DeclarationState;11import com.greghaskins.spectrum.internal.Suite;12import com.greghaskins.spectrum.internal.blocks.IdempotentBlock;13import com.greghaskins.spectrum.internal.hooks.EagerLetHook;14import com.greghaskins.spectrum.internal.hooks.Hook;15import com.greghaskins.spectrum.internal.hooks.HookContext.AppliesTo;16import com.greghaskins.spectrum.internal.hooks.HookContext.Precedence;17import com.greghaskins.spectrum.internal.hooks.LetHook;18import org.junit.AssumptionViolatedException;19import java.util.function.Supplier;20public interface Specification {21  /**22   * Declare a test suite that describes the expected behavior of the system in a given context.23   *24   * @param context Description of the context for this suite25   * @param block   {@link Block} with one or more calls to {@link #it(String, Block) it} that26   *                define each expected behavior27   */28  static void describe(final String context, final Block block) {29    final Suite suite = DeclarationState.instance()30        .getCurrentSuiteBeingDeclared()31        .addSuite(context);32    suite.applyConfigurationFromBlock(block);33    DeclarationState.instance().beginDeclaration(suite, block);34  }35  /**36   * Focus on this specific suite, while ignoring others.37   *38   * @param context Description of the context for this suite39   * @param block   {@link Block} with one or more calls to {@link #it(String, Block) it} that40   *                define each expected behavior41   * @see #describe(String, Block)42   */43  static void fdescribe(final String context, final Block block) {44    describe(context, with(focus(), block));45  }46  /**47   * Ignore the specific suite.48   *49   * @param context Description of the context for this suite50   * @param block   {@link Block} with one or more calls to {@link #it(String, Block) it} that51   *                define each expected behavior52   * @see #describe(String, Block)53   */54  static void xdescribe(final String context, final Block block) {55    describe(context, with(ignore(), block));56  }57  /**58   * Declare a spec, or test, for an expected behavior of the system in this suite context.59   *60   * @param behavior Description of the expected behavior61   * @param block    {@link Block} that verifies the system behaves as expected and throws a {@link62   *                 java.lang.Throwable Throwable} if that expectation is not met.63   */64  static void it(final String behavior, final Block block) {65    DeclarationState.instance().getCurrentSuiteBeingDeclared().addSpec(behavior, block);66  }67  /**68   * Declare a pending spec (without a block) that will be ignored.69   *70   * @param behavior Description of the expected behavior71   * @see #xit(String, Block)72   */73  static void it(final String behavior) {74    DeclarationState.instance().getCurrentSuiteBeingDeclared().addSpec(behavior, null).ignore();75  }76  /**77   * Focus on this specific spec, while ignoring others.78   *79   * @param behavior Description of the expected behavior80   * @param block    {@link Block} that verifies the system behaves as expected and throws a {@link81   *                 java.lang.Throwable Throwable} if that expectation is not met.82   * @see #it(String, Block)83   */84  static void fit(final String behavior, final Block block) {85    it(behavior, with(focus(), block));86  }87  /**88   * Mark a spec as ignored so that it will be skipped.89   *90   * @param behavior Description of the expected behavior91   * @param block    {@link Block} that will not run, since this spec is ignored.92   * @see #it(String, Block)93   */94  static void xit(final String behavior, final Block block) {95    it(behavior);96  }97  /**98   * Declare a {@link Block} to be run before each spec in the suite.99   *100   * <p>101   * Use this to perform setup actions that are common across tests in the context. If multiple102   * {@code beforeEach} blocks are declared, they will run in declaration order.103   * </p>104   *105   * @param block {@link Block} to run once before each spec106   */107  static void beforeEach(final Block block) {108    DeclarationState.instance().addHook(before(block), AppliesTo.ATOMIC_ONLY, Precedence.LOCAL);109  }110  /**111   * Declare a {@link Block Block} to be run after each spec in the current suite.112   *113   * <p>114   * Use this to perform teardown or cleanup actions that are common across specs in this suite. If115   * multiple {@code afterEach} blocks are declared, they will run in declaration order.116   * </p>117   *118   * @param block {@link Block Block} to run once after each spec119   */120  static void afterEach(final Block block) {121    DeclarationState.instance().addHook(after(block), AppliesTo.ATOMIC_ONLY,122        Precedence.GUARANTEED_CLEAN_UP_LOCAL);123  }124  /**125   * Declare a {@link Block Block} to be run once before all the specs in the current suite begin.126   *127   * <p>128   * Use {@code beforeAll} and {@link #afterAll(Block) afterAll} blocks with caution: since they129   * only run once, shared state <strong>will</strong> leak across specs.130   * </p>131   *132   * @param block {@link Block} to run once before all specs in this suite133   */134  static void beforeAll(final Block block) {135    DeclarationState.instance().addHook(before(new IdempotentBlock(block)), AppliesTo.ATOMIC_ONLY,136        Precedence.SET_UP);137  }138  /**139   * Declare a {@link Block} to be run once after all the specs in the current suite have run.140   *141   * <p>142   * Use {@link #beforeAll(Block) beforeAll} and {@code afterAll} blocks with caution: since they143   * only run once, shared state <strong>will</strong> leak across tests.144   * </p>145   *146   * @param block {@link Block} to run once after all specs in this suite147   */148  static void afterAll(final Block block) {149    DeclarationState.instance().addHook(after(block), AppliesTo.ONCE,150        Precedence.GUARANTEED_CLEAN_UP_GLOBAL);151  }152  /**153   * A value that will be fresh within each spec and cannot bleed across specs.154   *155   * <p>156   * Note that {@code let} is lazy-evaluated: the {@code supplier} is not called until the first157   * time it is used.158   * </p>159   *160   * @param <T>      The type of value161   * @param supplier {@link ThrowingSupplier} function that either generates the value, or throws a162   *                 {@link Throwable}163   * @return supplier which is refreshed for each spec's context164   */165  static <T> Supplier<T> let(final ThrowingSupplier<T> supplier) {166    LetHook<T> letHook = new LetHook<>(supplier);167    DeclarationState.instance().addHook(letHook, AppliesTo.ATOMIC_ONLY, Precedence.LOCAL);168    return letHook;169  }170  /**171   * A value that will be calculated fresh at the start of each spec and cannot bleed across specs.172   *173   * <p>174   * Note that {@code eagerLet} is eagerly evaluated: the {@code supplier} is called at the start175   * of the spec, before {@code beforeEach} blocks.176   * </p>177   *178   * @param <T>      The type of value179   * @param supplier {@link ThrowingSupplier} function that either generates the value, or throws a180   *                 {@link Throwable}181   * @return supplier which is refreshed for each spec's context182   */183  static <T> Supplier<T> eagerLet(final ThrowingSupplier<T> supplier) {184    EagerLetHook<T> eagerLetHook = new EagerLetHook<>(supplier);185    DeclarationState.instance().addHook(eagerLetHook, AppliesTo.ATOMIC_ONLY, Precedence.LOCAL);186    return eagerLetHook;187  }188  /**189   * Define a test context. Alias for {@link #describe}.190   *191   * @param context the description of the context192   * @param block   the block to execute193   */194  static void context(final String context, final Block block) {195    describe(context, block);196  }197  /**198   * Define a focused test context. Alias for {@link #fdescribe}.199   *200   * @param context the description of the context...

Source:LetHook.java

...16 * <p>Values are lazily initialized and then cached, so a value is not calculated until the first17 * time it is needed in a given test. Subsequent fetches of the value within the same test will18 * return the cached value.19 */20public class LetHook<T> implements SupplyingHook<T> {21  private final ThrowingSupplier<T> supplier;22  private final Variable<T> cachedValue = new Variable<>();23  private boolean isCached;24  public LetHook(final ThrowingSupplier<T> supplier) {25    this.supplier = supplier;26    this.isCached = false;27  }28  @Override29  public void accept(final Description description,30      final RunReporting<Description, Failure> reporting, final Block block)31      throws Throwable {32    try {33      block.run();34    } finally {35      clear();36    }37  }38  @Override...

Source:EagerLetHook.java

2import com.greghaskins.spectrum.ThrowingSupplier;3/**4 * Implementation of an eager version of {@code let}.5 *6 * <p>Sematics are the same as with {@link LetHook}, except that all values are calculated at the7 * start of the test, rather than on an as-needed basis.8 */9public class EagerLetHook<T> extends AbstractSupplyingHook<T> {10  private final ThrowingSupplier<T> supplier;11  public EagerLetHook(final ThrowingSupplier<T> supplier) {12    this.supplier = supplier;13  }14  protected T before() {15    return supplier.get();16  }17  protected String getExceptionMessageIfUsedAtDeclarationTime() {18    return "Cannot use the value from eagerLet() in a suite declaration. "19        + "It may only be used in the context of a running spec.";20  }21}...

LetHook

Using AI Code Generation

1import com.greghaskins.spectrum.Spectrum;2import com.greghaskins.spectrum.Spectrum.*;3import com.greghaskins.spectrum.internal.hooks.LetHook;4import com.greghaskins.spectrum.internal.hooks.LetHook.*;5import static com.greghaskins.spectrum.Spectrum.*;6public class LetHookExample {7    public static void main(String[] args) {8        describe("LetHook", () -> {9            it("should be able to add let hook", () -> {10                LetHook letHook = new LetHook();11                letHook.let("a", () -> "a");12                letHook.let("b", () -> "b");13                letHook.let("c", () -> "c");14            });15        });16    }17}

LetHook

Using AI Code Generation

1import com.greghaskins.spectrum.Spectrum;2import com.greghaskins.spectrum.Spectrum.*;3import com.greghaskins.spectrum.internal.hooks.LetHook;4import com.greghaskins.spectrum.internal.hooks.LetHook.LetHookAction;5import com.greghaskins.spectrum.internal.hooks.LetHook.LetHookActionWithResult;6public class 1 {7  public static void main(String[] args) {8    Spectrum.describe("LetHook", () -> {9      Spectrum.beforeEach(() -> {10        System.out.println("beforeEach");11      });12      Spectrum.afterEach(() -> {13        System.out.println("afterEach");14      });15      Spectrum.let("let1", () -> {16        System.out.println("let1");17        return "let1";18      });19      Spectrum.let("let2", () -> {20        System.out.println("let2");21        return "let2";22      });23      Spectrum.let("let3", () -> {24        System.out.println("let3");25        return "let3";26      });27      Spectrum.let("let4", () -> {28        System.out.println("let4");29        return "let4";30      });31      Spectrum.it("test1", () -> {32        System.out.println("test1");33      });34      Spectrum.it("test2", () -> {35        System.out.println("test2");36      });37      Spectrum.it("test3", () -> {38        System.out.println("test3");39      });40      Spectrum.it("test4", () -> {41        System.out.println("test4");42      });43    });44  }45}46import com.greghaskins.spectrum.Spectrum;47import com.greghaskins.spectrum.Spectrum.*;48import com.greghaskins.spectrum.internal.hooks.LetHook;49import com.greghaskins.spectrum.internal.hooks.LetHook.LetHookAction;50import com.greghaskins.spectrum.internal.hooks.LetHook.LetHookActionWithResult;51public class 2 {52  public static void main(String[] args) {53    Spectrum.describe("LetHook", () -> {54      Spectrum.beforeEach(() -> {55        System.out.println("beforeEach");56      });57      Spectrum.afterEach(() -> {

LetHook

Using AI Code Generation

1import com.greghaskins.spectrum.internal.hooks.LetHook;2import com.greghaskins.spectrum.Spectrum;3import com.greghaskins.spectrum.Spectrum.*;4import com.greghaskins.spectrum.Spectrum.Let;5import com.greghaskins.spectrum.Spectrum.Describe;6import com.greghaskins.spectrum.Spectrum.Specify;7import com.greghaskins.spectrum.Spectrum.Before;8import com.greghaskins.spectrum.Spectrum.After;9import com.greghaskins.spectrum.Spectrum.AfterAll;10import com.greghaskins.spectrum.Spectrum.BeforeAll;11import com.greghaskins.spectrum.Spectrum.Suite;12import com.greghaskins.spectrum.Spectrum.Let;13import com.greghaskins.spectrum.Spectrum.Describe;14import com.greghaskins.spectrum.Spectrum.Specify;15import com.greghaskins.spectrum.Spectrum.Before;16import com.greghaskins.spectrum.Spectrum.After;17import com.greghaskins.spectrum.Spectrum.AfterAll;18import com.greghaskins.spectrum.Spectrum.BeforeAll;19import com.greghaskins.spectrum.Spectrum.Suite;20import com.greghaskins.spectrum.Spectrum.Let;21import com.greghaskins.spectrum.Spectrum.Describe;22import com.greghaskins.spectrum.Spectrum.Specify;23import com.greghaskins.spectrum.Spectrum.Before;24import com.greghaskins.spectrum.Spectrum.After;25import com.greghaskins.spectrum.Spectrum.AfterAll;26import com.greghaskins.spectrum.Spectrum.BeforeAll;27import com.greghaskins.spectrum.Spectrum.Suite;28import com.greghaskins.spectrum.Spectrum.Let;29import com.greghaskins.spectrum.Spectrum.Describe;30import com.greghaskins.spectrum.Spectrum.Specify;31import com.greghaskins.spectrum.Spectrum.Before;32import com.greghaskins.spectrum.Spectrum.After;33import com.greghaskins.spectrum.Spectrum.AfterAll;34import com.greghaskins.spectrum.Spectrum.BeforeAll;35import com.greghaskins.spectrum.Spectrum.Suite;36import com.greghaskins.spectrum.Spectrum.Let;37import com.gre

LetHook

Using AI Code Generation

1import com.greghaskins.spectrum.Spectrum;2import com.greghaskins.spectrum.internal.hooks.LetHook;3import java.util.function.Supplier;4import static com.greghaskins.spectrum.Spectrum.*;5public class LetHookExample {6    public static void main(String[] args) {7        describe("LetHook", () -> {8            it("creates a LetHook", () -> {9                LetHook<Integer> letHook = LetHook.let(() -> 5);10                Supplier<Integer> supplier = letHook.getSupplier();11                int value = supplier.get();12                assert value == 5;13            });14        });15        Spectrum.run();16    }17}

LetHook

Using AI Code Generation

1package com.greghaskins.spectrum.internal.hooks;2import com.greghaskins.spectrum.Hook;3import com.greghaskins.spectrum.LetHook;4public class LetHookTest {5  public static void main(String[] args) {6    Hook hook = LetHook.let(() -> "Hello");7    System.out.println(hook.get());8  }9}10public class LetHook<T> extends Hook<T> {11  public LetHook(Supplier<T> supplier) {12    super(supplier);13  }14}15public static <T> LetHook<T> let(Supplier<T> supplier) {16  return new LetHook<>(supplier);17}18public T get() {19  return getSupplier().get();20}21public Supplier<T> getSupplier() {22  return this.supplier;23}24private final Supplier<T> supplier;25private LetHook(Supplier<T> supplier) {26  this.supplier = supplier;27}

LetHook

Using AI Code Generation

1package com.greghaskins.spectrum.internal.hooks;2import com.greghaskins.spectrum.internal.Block;3public class LetHook {4    public static void letHook(final Block block) {5        block.execute();6    }7}8package com.greghaskins.spectrum.internal.hooks;9import com.greghaskins.spectrum.internal.Block;10import com.greghaskins.spectrum.internal.hooks.LetHook;11public class LetHook {12    public static void letHook(final Block block) {13        block.execute();14    }15}16package com.greghaskins.spectrum.internal.hooks;17import com.greghaskins.spectrum.internal.Block;18import com.greghaskins.spectrum.internal.hooks.LetHook;19public class LetHook {20    public static void letHook(final Block block) {21        block.execute();22    }23}24package com.greghaskins.spectrum.internal.hooks;25import com.greghaskins.spectrum.internal.Block;26import com.greghaskins.spectrum.internal.hooks.LetHook;27public class LetHook {28    public static void letHook(final Block block) {29        block.execute();30    }31}32package com.greghaskins.spectrum.internal.hooks;33import com.greghaskins.spectrum.internal.Block;34import com.greghaskins.spectrum.internal.hooks.LetHook;35public class LetHook {36    public static void letHook(final Block block) {37        block.execute();38    }39}40package com.greghaskins.spectrum.internal.hooks;41import com.greghaskins.spectrum.internal.Block;42import com.greghaskins.spectrum.internal.hooks.Let

LetHook

Using AI Code Generation

1package com.greghaskins.spectrum.internal.hooks;2import com.greghaskins.spectrum.internal.Block;3import java.util.function.Supplier;4public class LetHook<T> implements Hook {5  private final Supplier<T> supplier;6  private final Block block;7  public LetHook(final Supplier<T> supplier, final Block block) {8    this.supplier = supplier;9    this.block = block;10  }11  public void run() {12    block.run();13  }14  public String toString() {15    return "LetHook{supplier=" + supplier + ", block=" + block + "}";16  }17  public Supplier<T> getSupplier() {18    return supplier;19  }20  public Block getBlock() {21    return block;22  }23}24package com.greghaskins.spectrum.internal.hooks;25import com.greghaskins.spectrum.internal.Block;26import java.util.function.Supplier;27public class LetHook<T> implements Hook {28  private final Supplier<T> supplier;29  private final Block block;30  public LetHook(final Supplier<T> supplier, final Block block) {31    this.supplier = supplier;32    this.block = block;33  }34  public void run() {35    block.run();36  }37  public String toString() {38    return "LetHook{supplier=" + supplier + ", block=" + block + "}";39  }40  public Supplier<T> getSupplier() {41    return supplier;42  }43  public Block getBlock() {44    return block;45  }46}

LetHook

Using AI Code Generation

1import com.greghaskins.spectrum.internal.hooks.LetHook;2import com.greghaskins.spectrum.internal.hooks.LetHookContext;3public class LetHookExample {4    public static void main(String[] args) {5        LetHook letHook = new LetHook() {6            public void let(LetHookContext context) {7                System.out.println("LetHook");8                context.proceed();9            }10        };11        letHook.let(null);12    }13}

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