tests for javac internal modifications of -source attribute

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@1237203 13f79535-47bb-0310-9956-ffa450edef68

src/tests/junit/org/apache/tools/ant/taskdefs/compilers/DefaultCompilerAdapterTest.java

@@ -0,0 +1,181 @@
+/*
+ *  Licensed to the Apache Software Foundation (ASF) under one or more
+ *  contributor license agreements.  See the NOTICE file distributed with
+ *  this work for additional information regarding copyright ownership.
+ *  The ASF licenses this file to You 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 org.apache.tools.ant.taskdefs.compilers;
+
+import org.apache.tools.ant.Project;
+import org.apache.tools.ant.taskdefs.Javac;
+import org.apache.tools.ant.types.Commandline;
+import junit.framework.TestCase;
+
+public class DefaultCompilerAdapterTest extends TestCase {
+
+    private static class LogCapturingJavac extends Javac {
+        private StringBuffer sb = new StringBuffer();
+        public void log(String msg, int msgLevel) {
+            sb.append(msg);
+        }
+        String getLog() {
+            return sb.toString();
+        }
+    }
+
+    private static class SourceTargetHelper extends DefaultCompilerAdapter {
+        /**
+         * Overridden to have no effect.
+         */
+        protected Commandline setupJavacCommandlineSwitches(Commandline cmd,
+                                                            boolean debug) {
+            return cmd;
+        }
+
+        public boolean execute() { return false; }
+    }
+
+    public void testSourceIsIgnoredForJavac13() {
+        testSource(null, "javac1.3", "", null, "1.1");
+        testSource(null, "javac1.3", "", null, "1.2");
+        testSource(null, "javac1.3", "", null, "1.3");
+        testSource(null, "javac1.3", "", null, "1.4");
+    }
+
+    public void testSource11IsUpgradedTo13() {
+        testSource("1.3", "javac1.4", "", null, "1.1");
+        testSource("1.3", "javac1.5", "", null, "1.1");
+        testSource("1.3", "javac1.6", "", null, "1.1");
+        testSource("1.3", "javac1.7", "", null, "1.1");
+        testSource("1.3", "javac1.8", "", null, "1.1");
+    }
+
+    public void testSource12IsUpgradedTo13() {
+        testSource("1.3", "javac1.4", "", null, "1.2");
+        testSource("1.3", "javac1.5", "", null, "1.2");
+        testSource("1.3", "javac1.6", "", null, "1.2");
+        testSource("1.3", "javac1.7", "", null, "1.2");
+        testSource("1.3", "javac1.8", "", null, "1.2");
+    }
+
+    public void testImplicitSourceForJava15() {
+        commonSourceDowngrades("javac1.5");
+        testSource(null, "javac1.5", "", "1.5");
+        testSource(null, "javac1.5", "", "5");
+    }
+
+    public void testImplicitSourceForJava16() {
+        commonSourceDowngrades("javac1.6");
+        testSource(null, "javac1.6", "", "1.5");
+        testSource(null, "javac1.6", "", "5");
+        testSource(null, "javac1.6", "", "1.6");
+        testSource(null, "javac1.6", "", "6");
+    }
+
+    public void testImplicitSourceForJava17() {
+        commonSourceDowngrades("javac1.7");
+        testSource("1.5", "javac1.7",
+                   "If you specify -target 1.5 you now must also specify"
+                   + " -source 1.5", "1.5");
+        testSource("1.6", "javac1.7",
+                   "If you specify -target 1.6 you now must also specify"
+                   + " -source 1.6", "1.6");
+        /* FIXME - should be adapted as well
+        testSource("5", "javac1.7",
+                   "If you specify -target 5 you now must also specify"
+                   + " -source 5", "5");
+        testSource("6", "javac1.7",
+                   "If you specify -target 6 you now must also specify"
+                   + " -source 6", "6");
+        */
+        testSource(null, "javac1.7", "", "1.7");
+        testSource(null, "javac1.7", "", "7");
+    }
+
+    public void testImplicitSourceForJava18() {
+        commonSourceDowngrades("javac1.8");
+        testSource("1.5", "javac1.8",
+                   "If you specify -target 1.5 you now must also specify"
+                   + " -source 1.5", "1.5");
+        testSource("1.6", "javac1.8",
+                   "If you specify -target 1.6 you now must also specify"
+                   + " -source 1.6", "1.6");
+        testSource("1.7", "javac1.8",
+                   "If you specify -target 1.7 you now must also specify"
+                   + " -source 1.7", "1.7");
+        /* FIXME - should be adapted as well
+        testSource("5", "javac1.8",
+                   "If you specify -target 5 you now must also specify"
+                   + " -source 5", "5");
+        testSource("6", "javac1.8",
+                   "If you specify -target 6 you now must also specify"
+                   + " -source 6", "6");
+        testSource("7", "javac1.8",
+                   "If you specify -target 7 you now must also specify"
+                   + " -source 7", "7");
+        */
+        testSource(null, "javac1.8", "", "1.8");
+        testSource(null, "javac1.8", "", "8");
+    }
+
+    private void commonSourceDowngrades(String javaVersion) {
+        // FIXME, should be minimum 1.3 as -source
+        testSource("1.2", javaVersion,
+                   "If you specify -target 1.1 you now must also specify"
+                   + " -source 1.2", "1.1");
+        testSource("1.2", javaVersion,
+                   "If you specify -target 1.2 you now must also specify"
+                   + " -source 1.2", "1.2");
+        testSource("1.3", javaVersion,
+                   "If you specify -target 1.3 you now must also specify"
+                   + " -source 1.3", "1.3");
+        testSource("1.4", javaVersion,
+                   "If you specify -target 1.4 you now must also specify"
+                   + " -source 1.4", "1.4");
+    }
+
+    private void testSource(String expectedSource, String javaVersion,
+                            String expectedLog, String configuredTarget) {
+        testSource(expectedSource, javaVersion, expectedLog, configuredTarget,
+                   null);
+    }
+
+    private void testSource(String expectedSource, String javaVersion,
+                            String expectedLog, String configuredTarget,
+                            String configuredSource) {
+        LogCapturingJavac javac = new LogCapturingJavac();
+        javac.setProject(new Project());
+        javac.setCompiler(javaVersion);
+        javac.setSource(configuredSource);
+        javac.setTarget(configuredTarget);
+        SourceTargetHelper sth = new SourceTargetHelper();
+        sth.setJavac(javac);
+        Commandline cmd = new Commandline();
+        sth.setupModernJavacCommandlineSwitches(cmd);
+        if ("".equals(expectedLog)) {
+            assertEquals("", javac.getLog());
+        } else {
+            String l = javac.getLog();
+            assertTrue("expected to find '" + expectedLog + "' in '" + l + "'", 
+                       l.indexOf(expectedLog) > -1);
+        }
+        String[] args = cmd.getCommandline();
+        assertEquals(expectedSource == null ? 0 : 2, args.length);
+        if (expectedSource != null) {
+            assertEquals("-source", args[0]);
+            assertEquals(expectedSource, args[1]);
+        }
+    }
+}