Java tutorial
/* * 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.metron.common.stellar; import com.google.common.collect.ImmutableMap; import org.apache.commons.lang3.tuple.Pair; import org.apache.metron.common.dsl.ParseException; import org.apache.metron.common.dsl.Token; import org.junit.Assert; import org.junit.Rule; import org.junit.Test; import org.junit.rules.ExpectedException; import java.util.HashMap; import java.util.Map; import static org.apache.metron.common.utils.StellarProcessorUtils.run; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertTrue; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.when; @SuppressWarnings("unchecked") public class StellarArithmeticTest { @Rule public final ExpectedException exception = ExpectedException.none(); @Test public void addingLongsShouldYieldLong() throws Exception { final long timestamp = 1452013350000L; String query = "TO_EPOCH_TIMESTAMP('2016-01-05 17:02:30', 'yyyy-MM-dd HH:mm:ss', 'UTC') + 2"; assertEquals(timestamp + 2, run(query, new HashMap<>())); } @Test public void addingIntegersShouldYieldAnInteger() throws Exception { String query = "1 + 2"; assertEquals(3, run(query, new HashMap<>())); } @Test public void addingDoublesShouldYieldADouble() throws Exception { String query = "1.0 + 2.0"; assertEquals(3.0, run(query, new HashMap<>())); } @Test public void addingDoubleAndIntegerWhereSubjectIsDoubleShouldYieldADouble() throws Exception { String query = "2.1 + 1"; assertEquals(3.1, run(query, new HashMap<>())); } @Test public void addingDoubleAndIntegerWhereSubjectIsIntegerShouldYieldADouble() throws Exception { String query = "1 + 2.1"; assertEquals(3.1, run(query, new HashMap<>())); } @Test public void testArithmetic() { assertEquals(3, run("1 + 2", new HashMap<>())); assertEquals(3.2, run("1.2 + 2", new HashMap<>())); assertEquals(1.2e-3 + 2, run("1.2e-3 + 2", new HashMap<>())); assertEquals(1.2f + 3.7, run("1.2f + 3.7", new HashMap<>())); assertEquals(12L * (1.2f + 7), run("12L*(1.2f + 7)", new HashMap<>())); assertEquals(12.2f * (1.2f + 7L), run("TO_FLOAT(12.2) * (1.2f + 7L)", new HashMap<>())); } @Test public void testNumericOperations() { { String query = "TO_INTEGER(1 + 2*2 + 3 - 4 - 0.5)"; assertEquals(3, (Integer) run(query, new HashMap<>()), 1e-6); } { String query = "1 + 2*2 + 3 - 4 - 0.5"; assertEquals(3.5, (Double) run(query, new HashMap<>()), 1e-6); } { String query = "2*one*(1 + 2*2 + 3 - 4)"; assertEquals(8, run(query, ImmutableMap.of("one", 1))); } { String query = "2*(1 + 2 + 3 - 4)"; assertEquals(4, (Integer) run(query, ImmutableMap.of("one", 1, "very_nearly_one", 1.000001)), 1e-6); } { String query = "1 + 2 + 3 - 4 - 2"; assertEquals(0, (Integer) run(query, ImmutableMap.of("one", 1, "very_nearly_one", 1.000001)), 1e-6); } { String query = "1 + 2 + 3 + 4"; assertEquals(10, (Integer) run(query, ImmutableMap.of("one", 1, "very_nearly_one", 1.000001)), 1e-6); } { String query = "(one + 2)*3"; assertEquals(9, (Integer) run(query, ImmutableMap.of("one", 1, "very_nearly_one", 1.000001)), 1e-6); } { String query = "TO_INTEGER((one + 2)*3.5)"; assertEquals(10, (Integer) run(query, ImmutableMap.of("one", 1, "very_nearly_one", 1.000001)), 1e-6); } { String query = "1 + 2*3"; assertEquals(7, (Integer) run(query, ImmutableMap.of("one", 1, "very_nearly_one", 1.000001)), 1e-6); } { String query = "TO_LONG(foo)"; Assert.assertNull(run(query, ImmutableMap.of("foo", "not a number"))); } { String query = "TO_LONG(foo)"; assertEquals(232321L, run(query, ImmutableMap.of("foo", "00232321"))); } { String query = "TO_LONG(foo)"; assertEquals(Long.MAX_VALUE, run(query, ImmutableMap.of("foo", Long.toString(Long.MAX_VALUE)))); } } @Test public void verifyExpectedReturnTypes() throws Exception { Token<Integer> integer = mock(Token.class); when(integer.getValue()).thenReturn(1); Token<Long> lng = mock(Token.class); when(lng.getValue()).thenReturn(1L); Token<Double> dbl = mock(Token.class); when(dbl.getValue()).thenReturn(1.0D); Token<Float> flt = mock(Token.class); when(flt.getValue()).thenReturn(1.0F); Map<Pair<String, String>, Class<? extends Number>> expectedReturnTypeMappings = new HashMap<Pair<String, String>, Class<? extends Number>>() { { put(Pair.of("TO_FLOAT(3.0)", "TO_LONG(1)"), Float.class); put(Pair.of("TO_FLOAT(3)", "3.0"), Double.class); put(Pair.of("TO_FLOAT(3)", "TO_FLOAT(3)"), Float.class); put(Pair.of("TO_FLOAT(3)", "3"), Float.class); put(Pair.of("TO_LONG(1)", "TO_LONG(1)"), Long.class); put(Pair.of("TO_LONG(1)", "3.0"), Double.class); put(Pair.of("TO_LONG(1)", "TO_FLOAT(3)"), Float.class); put(Pair.of("TO_LONG(1)", "3"), Long.class); put(Pair.of("3.0", "TO_LONG(1)"), Double.class); put(Pair.of("3.0", "3.0"), Double.class); put(Pair.of("3.0", "TO_FLOAT(3)"), Double.class); put(Pair.of("3.0", "3"), Double.class); put(Pair.of("3", "TO_LONG(1)"), Long.class); put(Pair.of("3", "3.0"), Double.class); put(Pair.of("3", "TO_FLOAT(3)"), Float.class); put(Pair.of("3", "3"), Integer.class); } }; expectedReturnTypeMappings.forEach((pair, expectedClass) -> { assertTrue( run(pair.getLeft() + " * " + pair.getRight(), ImmutableMap.of()).getClass() == expectedClass); assertTrue( run(pair.getLeft() + " + " + pair.getRight(), ImmutableMap.of()).getClass() == expectedClass); assertTrue( run(pair.getLeft() + " - " + pair.getRight(), ImmutableMap.of()).getClass() == expectedClass); assertTrue( run(pair.getLeft() + " / " + pair.getRight(), ImmutableMap.of()).getClass() == expectedClass); }); } @Test public void happyPathFloatArithmetic() throws Exception { Object run = run(".0f * 1", ImmutableMap.of()); assertEquals(.0f * 1, run); assertEquals(Float.class, run.getClass()); Object run1 = run("0.f / 1F", ImmutableMap.of()); assertEquals(0.f / 1F, run1); assertEquals(Float.class, run1.getClass()); Object run2 = run(".0F + 1.0f", ImmutableMap.of()); assertEquals(.0F + 1.0f, run2); assertEquals(Float.class, run2.getClass()); Object run3 = run("0.0f - 0.1f", ImmutableMap.of()); assertEquals(0.0f - 0.1f, run3); assertEquals(Float.class, run2.getClass()); } @SuppressWarnings("PointlessArithmeticExpression") @Test public void happyPathLongArithmetic() throws Exception { assertEquals(0L * 1L, run("0L * 1L", ImmutableMap.of())); assertEquals(0l / 1L, run("0l / 1L", ImmutableMap.of())); assertEquals(1L - 1l, run("1L - 1l", ImmutableMap.of())); assertEquals(2147483648L + 1L, run("2147483648L + 1L", ImmutableMap.of())); } @SuppressWarnings("NumericOverflow") @Test public void checkInterestingCases() throws Exception { assertEquals((((((1L) + .5d)))) * 6.f, run("(((((1L) + .5d)))) * 6.f", ImmutableMap.of())); assertEquals((((((1L) + .5d)))) * 6.f / 0.f, run("(((((1L) + .5d)))) * 6.f / 0.f", ImmutableMap.of())); assertEquals(Double.class, run("(((((1L) + .5d)))) * 6.f / 0.f", ImmutableMap.of()).getClass()); } @Test public void makeSureStellarProperlyEvaluatesLiteralsToExpectedTypes() throws Exception { { assertEquals(Float.class, run("6.f", ImmutableMap.of()).getClass()); assertEquals(Float.class, run(".0f", ImmutableMap.of()).getClass()); assertEquals(Float.class, run("6.0F", ImmutableMap.of()).getClass()); assertEquals(Float.class, run("6f", ImmutableMap.of()).getClass()); assertEquals(Float.class, run("6e-6f", ImmutableMap.of()).getClass()); assertEquals(Float.class, run("6e+6f", ImmutableMap.of()).getClass()); assertEquals(Float.class, run("6e6f", ImmutableMap.of()).getClass()); assertEquals(Float.class, run("TO_FLOAT(1231)", ImmutableMap.of()).getClass()); assertEquals(Float.class, run("TO_FLOAT(12.31)", ImmutableMap.of()).getClass()); assertEquals(Float.class, run("TO_FLOAT(12.31f)", ImmutableMap.of()).getClass()); assertEquals(Float.class, run("TO_FLOAT(12L)", ImmutableMap.of()).getClass()); } { assertEquals(Double.class, run("6.d", ImmutableMap.of()).getClass()); assertEquals(Double.class, run("6.D", ImmutableMap.of()).getClass()); assertEquals(Double.class, run("6.0d", ImmutableMap.of()).getClass()); assertEquals(Double.class, run("6D", ImmutableMap.of()).getClass()); assertEquals(Double.class, run("6e5D", ImmutableMap.of()).getClass()); assertEquals(Double.class, run("6e-5D", ImmutableMap.of()).getClass()); assertEquals(Double.class, run("6e+5D", ImmutableMap.of()).getClass()); assertEquals(Double.class, run("TO_DOUBLE(1231)", ImmutableMap.of()).getClass()); assertEquals(Double.class, run("TO_DOUBLE(12.31)", ImmutableMap.of()).getClass()); assertEquals(Double.class, run("TO_DOUBLE(12.31f)", ImmutableMap.of()).getClass()); assertEquals(Double.class, run("TO_DOUBLE(12L)", ImmutableMap.of()).getClass()); } { assertEquals(Integer.class, run("6", ImmutableMap.of()).getClass()); assertEquals(Integer.class, run("60000000", ImmutableMap.of()).getClass()); assertEquals(Integer.class, run("-0", ImmutableMap.of()).getClass()); assertEquals(Integer.class, run("-60000000", ImmutableMap.of()).getClass()); assertEquals(Integer.class, run("TO_INTEGER(1231)", ImmutableMap.of()).getClass()); assertEquals(Integer.class, run("TO_INTEGER(12.31)", ImmutableMap.of()).getClass()); assertEquals(Integer.class, run("TO_INTEGER(12.31f)", ImmutableMap.of()).getClass()); assertEquals(Integer.class, run("TO_INTEGER(12L)", ImmutableMap.of()).getClass()); } { assertEquals(Long.class, run("12345678910l", ImmutableMap.of()).getClass()); assertEquals(Long.class, run("0l", ImmutableMap.of()).getClass()); assertEquals(Long.class, run("-0l", ImmutableMap.of()).getClass()); assertEquals(Long.class, run("-60000000L", ImmutableMap.of()).getClass()); assertEquals(Long.class, run("-60000000L", ImmutableMap.of()).getClass()); assertEquals(Long.class, run("TO_LONG(1231)", ImmutableMap.of()).getClass()); assertEquals(Long.class, run("TO_LONG(12.31)", ImmutableMap.of()).getClass()); assertEquals(Long.class, run("TO_LONG(12.31f)", ImmutableMap.of()).getClass()); assertEquals(Long.class, run("TO_LONG(12L)", ImmutableMap.of()).getClass()); } } @Test public void parseExceptionMultipleLeadingZerosOnInteger() throws Exception { exception.expect(ParseException.class); run("000000", ImmutableMap.of()); } @Test public void parseExceptionMultipleLeadingZerosOnLong() throws Exception { exception.expect(ParseException.class); run("000000l", ImmutableMap.of()); } @Test public void parseExceptionMultipleLeadingZerosOnDouble() throws Exception { exception.expect(ParseException.class); run("000000d", ImmutableMap.of()); } @Test public void parseExceptionMultipleLeadingZerosOnFloat() throws Exception { exception.expect(ParseException.class); run("000000f", ImmutableMap.of()); } @Test public void parseExceptionMultipleLeadingNegativeSignsFloat() throws Exception { exception.expect(ParseException.class); run("--000000f", ImmutableMap.of()); } @Test public void parseExceptionMultipleLeadingNegativeSignsDouble() throws Exception { exception.expect(ParseException.class); run("--000000D", ImmutableMap.of()); } @Test public void parseExceptionMultipleLeadingNegativeSignsLong() throws Exception { exception.expect(ParseException.class); run("--000000L", ImmutableMap.of()); } @Test(expected = ParseException.class) public void unableToDivideByZeroWithIntegers() throws Exception { run("0/0", ImmutableMap.of()); } @Test(expected = ParseException.class) public void unableToDivideByZeroWithLongs() throws Exception { run("0L/0L", ImmutableMap.of()); } @Test public void ableToDivideByZero() throws Exception { assertEquals(0F / 0F, run("0F/0F", ImmutableMap.of())); assertEquals(0D / 0D, run("0D/0D", ImmutableMap.of())); assertEquals(0D / 0F, run("0D/0F", ImmutableMap.of())); assertEquals(0F / 0D, run("0F/0D", ImmutableMap.of())); assertEquals(0F / 0, run("0F/0", ImmutableMap.of())); assertEquals(0D / 0, run("0D/0", ImmutableMap.of())); assertEquals(0 / 0D, run("0/0D", ImmutableMap.of())); assertEquals(0 / 0F, run("0/0F", ImmutableMap.of())); } }