org.opengis.cite.gpkg12.SuitePreconditions Maven / Gradle / Ivy

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This test suite checks GeoPackage 1.2 files for standards conformance.

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package org.opengis.cite.gpkg12;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.math.BigInteger;
import java.util.Arrays;
import java.util.logging.Level;
import java.util.logging.Logger;

import org.testng.Assert;
import org.testng.Reporter;
import org.testng.annotations.BeforeSuite;

/**
 * Checks that various preconditions are satisfied before the test suite is run. If any of
 * these (BeforeSuite) methods fail, all tests will be skipped.
 */
public class SuitePreconditions {

	private static final Logger LOGR = Logger.getLogger(SuitePreconditions.class.getName());

	/**
	 * Verifies that the referenced test subject exists and is a SQLite database file. The
	 * first 100 bytes comprise the database file header. The SQLITE_VERSION_NUMBER starts
	 * at offset 96; it resolves to an integer with the value (X*1000000 + Y*1000 + Z)
	 * where X, Y, and Z are the same numbers used in SQLITE_VERSION. The major version
	 * number, X, is always 3 for SQLite3.
	 * @throws IOException If an I/O error occurs while trying to read the data file.
	 */
	@BeforeSuite
	@SuppressWarnings("rawtypes")
	public void verifySQLiteMajorVersion() throws IOException {
		SuiteAttribute testFileAttr = SuiteAttribute.TEST_SUBJ_FILE;
		Object sutObj = Reporter.getCurrentTestResult()
			.getTestContext()
			.getSuite()
			.getAttribute(testFileAttr.getName());
		Class expectedType = testFileAttr.getType();
		if (null != sutObj && expectedType.isInstance(sutObj)) {
			File dataFile = File.class.cast(sutObj);
			Assert.assertTrue(dataFile.isFile(),
					String.format("Data file not found at %s", dataFile.getAbsolutePath()));
			final byte[] headerBytes = new byte[GPKG12.DB_HEADER_LENGTH];
			try (FileInputStream fileInputStream = new FileInputStream(dataFile)) {
				fileInputStream.read(headerBytes);
			}
			byte[] versionNumBytes = Arrays.copyOfRange(headerBytes, 96, headerBytes.length);
			int version = new BigInteger(versionNumBytes).intValue();
			Assert.assertEquals(version / 1000000, 3, "Unexpected SQLite major version in file header.");
		}
		else {
			String msg = String.format("Value of test suite attribute '%s' is missing or is not an instance of %s",
					testFileAttr.getName(), expectedType.getName());
			LOGR.log(Level.SEVERE, msg);
			throw new AssertionError(msg);
		}
	}

}