1 files changed, 101 insertions, 0 deletions
diff --git a/tools/runner/java/vogar/Expectation.java b/tools/runner/java/vogar/Expectation.java
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+++ b/tools/runner/java/vogar/Expectation.java
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+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * 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 vogar;
+
+import java.util.regex.Pattern;
+
+/**
+ * The expected result of an action execution. This is typically encoded in the
+ * expectations text file, which has the following format:
+ * <pre>
+ * test java.io.StreamTokenizer.Reset
+ * result UNSUPPORTED
+ * pattern .*should get token \[, but get -1.*
+ *
+ * # should we fix this?
+ * test java.util.Arrays.CopyMethods
+ * result COMPILE_FAILED
+ * pattern .*cannot find symbol.*
+ * </pre>
+ */
+final class Expectation {
+
+    /** The pattern to use when no expected output is specified */
+    private static final Pattern MATCH_ALL_PATTERN
+            = Pattern.compile(".*", Pattern.MULTILINE | Pattern.DOTALL);
+
+    /** The expectation of a general successful run. */
+    static final Expectation SUCCESS = new Expectation(Result.SUCCESS, null);
+
+    /** The action's expected result, such as {@code EXEC_FAILED}. */
+    private final Result result;
+
+    /** The pattern the expected output will match. */
+    private final Pattern pattern;
+
+    public Expectation(Result result, String pattern) {
+        if (result == null) {
+            throw new IllegalArgumentException();
+        }
+
+        this.result = result;
+        this.pattern = pattern != null
+                ? Pattern.compile(pattern, Pattern.MULTILINE | Pattern.DOTALL)
+                : MATCH_ALL_PATTERN;
+    }
+
+    public Result getResult() {
+        return result;
+    }
+
+    /**
+     * Returns true if {@code outcome} matches this expectation.
+     */
+    public boolean matches(Outcome outcome) {
+        return result == outcome.getResult() && patternMatches(outcome);
+    }
+
+    /**
+     * Returns the failure message for this failed run. This message is intended
+     * to help to diagnose why the run result didn't match what was expected.
+     */
+    public String getFailureMessage(Outcome outcome) {
+        StringBuilder builder = new StringBuilder();
+
+        if (result != Result.SUCCESS && result != outcome.getResult()) {
+            builder.append("Expected result: ")
+                    .append(result)
+                    .append("\n");
+        }
+
+        if (!patternMatches(outcome)) {
+            builder.append("Expected output to match \"")
+                    .append(pattern.pattern())
+                    .append("\"\n");
+        }
+
+        for (String output : outcome.getOutputLines()) {
+            builder.append(output).append("\n");
+        }
+
+        return builder.toString();
+    }
+
+    private boolean patternMatches(Outcome outcome) {
+        return pattern.matcher(Strings.join(outcome.getOutputLines(), "\n")).matches();
+    }
+}