gecko-dev/mobile/android/base/tests/testJarReader.java

package org.mozilla.gecko.tests;

import java.lang.ClassLoader;
import java.io.InputStream;
import java.lang.reflect.Field;
import java.lang.reflect.Method;

/**
 * A basic jar reader test. Tests reading a png from fennec's apk, as well
 * as loading some invalid jar urls.
 */
public class testJarReader extends BaseTest {
    @Override
    protected int getTestType() {
        return TEST_MOCHITEST;
    }

    public void testJarReader() {
        try {
            ClassLoader classLoader = getActivity().getClassLoader();

            Class appConstantsClass = classLoader.loadClass("org.mozilla.gecko.AppConstants");
            String omniJarName = (String) appConstantsClass.getField("OMNIJAR_NAME").get(null);

            Class gjrClass = classLoader.loadClass("org.mozilla.gecko.util.GeckoJarReader");
            Method getStreamMethod = gjrClass.getMethod("getStream", String.class);
            String appPath = getActivity().getApplication().getPackageResourcePath();
            mAsserter.isnot(appPath, null, "getPackageResourcePath is non-null");

            // Test reading a file from a jar url that looks correct.
            String url = "jar:file://" + appPath + "!/" + omniJarName;
            InputStream stream = (InputStream) getStreamMethod.invoke(null, "jar:" + url + "!/chrome/chrome/content/branding/favicon32.png");
            mAsserter.isnot(stream, null, "JarReader returned non-null for valid file in valid jar");

            // Test looking for an non-existent file in a jar.
            url = "jar:file://" + appPath + "!/" + omniJarName;
            stream = (InputStream) getStreamMethod.invoke(null, "jar:" + url + "!/chrome/chrome/content/branding/nonexistent_file.png");
            mAsserter.is(stream, null, "JarReader returned null for non-existent file in valid jar");

            // Test looking for a file that doesn't exist in the APK.
            url = "jar:file://" + appPath + "!/" + "BAD" + omniJarName;
            stream = (InputStream) getStreamMethod.invoke(null, "jar:" + url + "!/chrome/chrome/content/branding/favicon32.png");
            mAsserter.is(stream, null, "JarReader returned null for valid file in invalid jar file");

            // Test looking for an jar with an invalid url.
            url = "jar:file://" + appPath + "!" + "!/" + omniJarName;
            stream = (InputStream) getStreamMethod.invoke(null, "jar:" + url + "!/chrome/chrome/content/branding/nonexistent_file.png");
            mAsserter.is(stream, null, "JarReader returned null for bad jar url");

            // Test looking for a file that doesn't exist on disk.
            url = "jar:file://" + appPath + "BAD" + "!/" + omniJarName;
            stream = (InputStream) getStreamMethod.invoke(null, "jar:" + url + "!/chrome/chrome/content/branding/favicon32.png");
            mAsserter.is(stream, null, "JarReader returned null for a non-existent APK");
        } catch (java.lang.ClassCastException ex) {
            mAsserter.is(false, true, "Error getting OMNIJAR_NAME");
        } catch (java.lang.NoSuchFieldException ex) {
            mAsserter.is(false, true, "Error getting field");
        } catch (java.lang.ClassNotFoundException ex) {
            mAsserter.is(false, true, "Error getting class");
        } catch (java.lang.NoSuchMethodException ex) {
            mAsserter.is(false, true, "Error getting method");
        } catch (java.lang.IllegalAccessException ex) {
            mAsserter.is(false, true, "Error calling method");
        } catch (java.lang.reflect.InvocationTargetException ex) {
            mAsserter.is(false, true, "Invocation target exception " + ex.getTargetException());
        }
        // This test completes very quickly. If it completes too soon, the
        // minidumps directory may not be created before the process is
        // taken down, causing bug 722166.
        blockForGeckoReady();
    }

    private String getData(InputStream stream) {
        return new java.util.Scanner(stream).useDelimiter("\\A").next();
    }

}