test: New sangria-test project.

4 files changed, 136 insertions, 0 deletions

diff --git a/sangria-test/src/main/java/com/tavianator/sangria/test/AtomicMatcher.java b/sangria-test/src/main/java/com/tavianator/sangria/test/AtomicMatcher.java
new file mode 100644
index 0000000..03c897e
--- /dev/null
+++ b/sangria-test/src/main/java/com/tavianator/sangria/test/AtomicMatcher.java
@@ -0,0 +1,38 @@
+package com.tavianator.sangria.test;
+
+import com.google.inject.CreationException;
+import com.google.inject.Guice;
+import com.google.inject.Module;
+import com.google.inject.spi.Elements;
+import org.hamcrest.Description;
+import org.hamcrest.TypeSafeDiagnosingMatcher;
+
+/**
+ * Matcher that checks whether a {@link Module} can be installed multiple times.
+ *
+ * @author Tavian Barnes (tavianator@tavianator.com)
+ * @version 1.2
+ * @since 1.2
+ */
+final class AtomicMatcher extends TypeSafeDiagnosingMatcher<Module> {
+    @Override
+    protected boolean matchesSafely(Module item, Description mismatchDescription) {
+        // Pass through the SPI to make sure the Module is atomic regardless of its equals() implementation
+        // This ensures atomicity even through Modules.override(), for example
+        Module copy1 = Elements.getModule(Elements.getElements(item));
+        Module copy2 = Elements.getModule(Elements.getElements(item));
+
+        try {
+            Guice.createInjector(copy1, copy2);
+            return true;
+        } catch (CreationException e) {
+            mismatchDescription.appendValue(e);
+            return false;
+        }
+    }
+
+    @Override
+    public void describeTo(Description description) {
+        description.appendText("an atomic Module");
+    }
+}
diff --git a/sangria-test/src/main/java/com/tavianator/sangria/test/BestPracticesMatcher.java b/sangria-test/src/main/java/com/tavianator/sangria/test/BestPracticesMatcher.java
new file mode 100644
index 0000000..36eea97
--- /dev/null
+++ b/sangria-test/src/main/java/com/tavianator/sangria/test/BestPracticesMatcher.java
@@ -0,0 +1,42 @@
+package com.tavianator.sangria.test;
+
+import com.google.inject.AbstractModule;
+import com.google.inject.CreationException;
+import com.google.inject.Guice;
+import com.google.inject.Module;
+import org.hamcrest.Description;
+import org.hamcrest.TypeSafeDiagnosingMatcher;
+
+/**
+ * Matcher that checks whether a {@link Module} follows Guice best practices.
+ *
+ * @author Tavian Barnes (tavianator@tavianator.com)
+ * @version 1.2
+ * @since 1.2
+ */
+final class BestPracticesMatcher extends TypeSafeDiagnosingMatcher<Module> {
+    private static final class EnforcerModule extends AbstractModule {
+        @Override
+        protected void configure() {
+            binder().requireAtInjectOnConstructors();
+            binder().requireExactBindingAnnotations();
+            binder().requireExplicitBindings();
+        }
+    }
+
+    @Override
+    protected boolean matchesSafely(Module item, Description mismatchDescription) {
+        try {
+            Guice.createInjector(item, new EnforcerModule());
+            return true;
+        } catch (CreationException e) {
+            mismatchDescription.appendValue(e);
+            return false;
+        }
+    }
+
+    @Override
+    public void describeTo(Description description) {
+        description.appendText("a Module following Guice best practices");
+    }
+}
diff --git a/sangria-test/src/main/java/com/tavianator/sangria/test/SangriaMatchers.java b/sangria-test/src/main/java/com/tavianator/sangria/test/SangriaMatchers.java
new file mode 100644
index 0000000..da8dd74
--- /dev/null
+++ b/sangria-test/src/main/java/com/tavianator/sangria/test/SangriaMatchers.java
@@ -0,0 +1,31 @@
+package com.tavianator.sangria.test;
+
+import com.google.inject.Module;
+import org.hamcrest.Matcher;
+
+/**
+ * Guice-related Hamcrest matchers.
+ *
+ * @author Tavian Barnes (tavianator@tavianator.com)
+ * @version 1.2
+ * @since 1.2
+ */
+public final class SangriaMatchers {
+    private SangriaMatchers() {
+        // Not for instantiating
+    }
+
+    /**
+     * @return A {@link Matcher} that checks whether a {@link Module}'s bindings can be de-duplicated successfully.
+     */
+    public static Matcher<Module> atomic() {
+        return new AtomicMatcher();
+    }
+
+    /**
+     * @return A {@link Matcher} that checks whether a {@link Module} follows Guice best practices.
+     */
+    public static Matcher<Module> followsBestPractices() {
+        return new BestPracticesMatcher();
+    }
+}
diff --git a/sangria-test/src/main/java/com/tavianator/sangria/test/package-info.java b/sangria-test/src/main/java/com/tavianator/sangria/test/package-info.java
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index 0000000..0375640
--- /dev/null
+++ b/sangria-test/src/main/java/com/tavianator/sangria/test/package-info.java
@@ -0,0 +1,25 @@
+/****************************************************************************
+ * Sangria                                                                  *
+ * Copyright (C) 2014 Tavian Barnes <tavianator@tavianator.com>             *
+ *                                                                          *
+ * Licensed under the Apache License, Version 2.0 (the "License");          *
+ * you may not use this file except in compliance with the License.         *
+ * You may obtain a copy of the License at                                  *
+ *                                                                          *
+ * http://www.apache.org/licenses/LICENSE-2.0                               *
+ *                                                                          *
+ * Unless required by applicable law or agreed to in writing, software      *
+ * distributed under the License is distributed on an "AS IS" BASIS,        *
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. *
+ * See the License for the specific language governing permissions and      *
+ * limitations under the License.                                           *
+ ****************************************************************************/
+
+/**
+ * {@code sangria-test}: Utilities for testing with Guice.
+ *
+ * @author Tavian Barnes (tavianator@tavianator.com)
+ * @version 1.2
+ * @since 1.2
+ */
+package com.tavianator.sangria.test;