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Diffstat (limited to 'testutil/src/main/java/com/yahoo/test/Matchers.java')
-rw-r--r-- | testutil/src/main/java/com/yahoo/test/Matchers.java | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/testutil/src/main/java/com/yahoo/test/Matchers.java b/testutil/src/main/java/com/yahoo/test/Matchers.java new file mode 100644 index 00000000000..80e01b43a18 --- /dev/null +++ b/testutil/src/main/java/com/yahoo/test/Matchers.java @@ -0,0 +1,104 @@ +// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root. +package com.yahoo.test; + +import org.hamcrest.BaseMatcher; +import org.hamcrest.Description; + +import java.lang.reflect.Method; + +/** + * Some useful matchers. + * + * @author <a href="mailto:einarmr@yahoo-inc.com">Einar M R Rosenvinge</a> + */ +public final class Matchers { + + /** + * A match is found if at least <em>one</em> item in the Iterable has the given method, <em>and</em> the return value + * when calling it equals the given expected value. + * + * @param expected The expected value. + * @param methodName The name of the method to call. The method must take no parameters. + * @return A Matcher to match against an Iterable. + */ + @SuppressWarnings("rawtypes") + public static org.hamcrest.Matcher<java.lang.Iterable> hasItemWithMethod(final Object expected, final String methodName) { + return hasItemWithMethod(new MethodResult(methodName, expected)); + } + + /** + * A match is found if at least <em>one</em> item in the Iterable has <em>all</em> given methods, <em>and</em> + * the return values when calling them equals the given expected values. + * + * @param results The pairs of method names and expected results to compare. + * @return A Matcher to match against an Iterable. + */ + @SuppressWarnings("rawtypes") + public static org.hamcrest.Matcher<java.lang.Iterable> hasItemWithMethod(final MethodResult... results) { + return new BaseMatcher<Iterable>() { + @Override + public boolean matches(Object item) { + Iterable components = (Iterable) item; + if (!components.iterator().hasNext()) { + //empty collection + return false; + } + for (Object componentInList : components) { + boolean allMethodsMatch = false; + for (MethodResult result : results) { + Object strToMatch; + try { + Method method = componentInList.getClass().getMethod(result.getMethodName()); + strToMatch = method.invoke(componentInList); + } catch (Exception e) { + allMethodsMatch = false; + break; + } + if (result.getExpectedResult().equals(strToMatch)) { + allMethodsMatch = true; + } else { + allMethodsMatch = false; + break; + } + } + if (allMethodsMatch) { + return true; + } + } + return false; + } + + @Override + public void describeTo(Description description) { + StringBuilder b = new StringBuilder(); + for (MethodResult result : results) { + b.append(result).append(". "); + } + description.appendText(b.toString()); + } + }; + } + + public static final class MethodResult { + private final String methodName; + private final Object expectedResult; + + public MethodResult(String methodName, Object expectedResult) { + this.methodName = methodName; + this.expectedResult = expectedResult; + } + + public Object getExpectedResult() { + return expectedResult; + } + + public String getMethodName() { + return methodName; + } + + @Override + public String toString() { + return "Method: '" + methodName + "\', expected result: '" + expectedResult + '\''; + } + } +} |