junit 5: don't warn on fail with message that message is missing (IDEA-163692)

plugins/InspectionGadgets/InspectionGadgetsAnalysis/src/com/siyeh/ig/testFrameworks/AssertHint.java

@@ -108,7 +108,7 @@ public class AssertHint {
     }
     else {
       argumentIndex = 0;
-      if (parameters.length > minimumParamCount && minimumParamCount > 0) {
+      if (parameters.length > minimumParamCount && minimumParamCount >= 0) {
         int lastParameterIdx = parameters.length - 1;
         //check that it's not delta in assertEquals(dbl, dbl, dbl), etc
         if (parameters[lastParameterIdx].getType() instanceof PsiClassType) {

plugins/InspectionGadgets/test/com/siyeh/igtest/junit/junit_asserts_without_messages/FailWithMessage.java

@@ -0,0 +1,22 @@
+/*
+ * Copyright 2000-2016 JetBrains s.r.o.
+ *
+ * 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.
+ */
+import static org.junit.jupiter.api.Assertions.fail;
+public class FailWithMessage {
+  @org.junit.Test
+  public void testFailWithMessage() {
+    fail("some reason");
+  }
+}

plugins/InspectionGadgets/testsrc/com/siyeh/ig/junit/JUnitAssertsWithoutMessagesInspectionTest.java

@@ -0,0 +1,65 @@
+/*
+ * Copyright 2000-2016 JetBrains s.r.o.
+ *
+ * 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.
+ */
+package com.siyeh.ig.junit;
+
+import com.intellij.codeInspection.InspectionProfileEntry;
+import com.intellij.testFramework.LightProjectDescriptor;
+import com.siyeh.ig.LightInspectionTestCase;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+public class JUnitAssertsWithoutMessagesInspectionTest extends LightInspectionTestCase {
+
+  public void testFailWithMessage() {
+    doTest();
+  }
+
+  @Override
+  protected String[] getEnvironmentClasses() {
+    return new String[] {
+      "package org.junit;" +
+      "import java.lang.annotation.ElementType;" +
+      "import java.lang.annotation.Retention;" +
+      "import java.lang.annotation.RetentionPolicy;" +
+      "import java.lang.annotation.Target;" +
+      "@Retention(RetentionPolicy.RUNTIME)" +
+      "@Target({ElementType.METHOD})" +
+      "public @interface Test {}",
+      "package org.junit;" +
+      "public class Assert {" +
+      "  static public void assertEquals(double expected, double actual, double delta) {}" +
+      "  static public void assertEquals(Object expected, Object actual){}" +
+      "}",
+
+      "package org.junit.jupiter.api;\n" +
+      "public final class Assertions {\n" +
+      "    public static void fail(String message) {}\n" +
+      "}"
+    };
+  }
+
+  @NotNull
+  @Override
+  protected LightProjectDescriptor getProjectDescriptor() {
+    return JAVA_8;
+  }
+
+  @Nullable
+  @Override
+  protected InspectionProfileEntry getInspection() {
+    return new JUnitAssertsWithoutMessagesInspection();
+  }
+}