1 package net.avcompris.commons3.api.tests;
2
3 import static com.google.common.base.Preconditions.checkState;
4
5 import java.lang.reflect.Constructor;
6 import java.lang.reflect.Executable;
7 import java.util.Iterator;
8
9 import org.junit.jupiter.api.extension.ExtensionContext;
10 import org.junit.jupiter.api.extension.ParameterContext;
11 import org.junit.jupiter.api.extension.ParameterResolutionException;
12 import org.junit.jupiter.api.extension.ParameterResolver;
13
14 import net.avcompris.commons3.api.tests.TestsSpec.TestSpec;
15
16 public final class TestSpecParametersExtension implements ParameterResolver {
17
18 @Override
19 public boolean supportsParameter(final ParameterContext parameterContext, final ExtensionContext extensionContext)
20 throws ParameterResolutionException {
21
22 final Executable declaringExecutable = parameterContext.getParameter().getDeclaringExecutable();
23
24 return Constructor.class.isAssignableFrom(declaringExecutable.getClass())
25 && TestSpec.class.equals(parameterContext.getParameter().getType());
26 }
27
28 @Override
29 public TestSpec resolveParameter(final ParameterContext parameterContext, final ExtensionContext extensionContext)
30 throws ParameterResolutionException {
31
32 checkState(iterator != null, "iterator should not be null");
33
34 final TestSpec testSpec = iterator.next();
35
36 if (!iterator.hasNext()) {
37
38 iterator = null;
39 }
40
41 return testSpec;
42 }
43
44 private static Iterator<TestSpec> iterator = null;
45
46 public static void inject(final Iterable<TestSpec> testSpecs) {
47
48 checkState(iterator == null, "iterator should be null");
49
50 iterator = testSpecs.iterator();
51
52 if (!iterator.hasNext()) {
53
54 throw new IllegalArgumentException("iterable should not be empty");
55 }
56 }
57 }