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package com.yahoo.searchlib.tensor;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.yahoo.io.GrowableByteBuffer;
import com.yahoo.searchlib.rankingexpression.RankingExpression;
import com.yahoo.searchlib.rankingexpression.evaluation.BooleanValue;
import com.yahoo.searchlib.rankingexpression.evaluation.DoubleCompatibleValue;
import com.yahoo.searchlib.rankingexpression.evaluation.MapContext;
import com.yahoo.searchlib.rankingexpression.evaluation.StringValue;
import com.yahoo.searchlib.rankingexpression.evaluation.TensorValue;
import com.yahoo.searchlib.rankingexpression.evaluation.Value;
import com.yahoo.searchlib.rankingexpression.parser.ParseException;
import com.yahoo.tensor.Tensor;
import com.yahoo.tensor.serialization.TypedBinaryFormat;
import org.junit.Assert;
import org.junit.Test;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Optional;
import static org.junit.Assert.assertEquals;
public class TensorConformanceTest {
private static String testPath = "eval/src/apps/tensor_conformance/test_spec.json";
@Test
public void testConformance() throws IOException {
File testSpec = new File(testPath);
if (!testSpec.exists()) {
testSpec = new File("../" + testPath);
}
int count = 0;
List<Integer> failList = new ArrayList<>();
try(BufferedReader br = new BufferedReader(new FileReader(testSpec))) {
String test = br.readLine();
while (test != null) {
boolean success = testCase(test, count);
if (!success) {
failList.add(count);
}
test = br.readLine();
count++;
}
}
assertEquals(failList.size() + " conformance test fails: " + failList, 0, failList.size());
}
private boolean testCase(String test, int count) {
try {
ObjectMapper mapper = new ObjectMapper();
JsonNode node = mapper.readTree(test);
if (node.has("num_tests")) {
Assert.assertEquals(node.get("num_tests").asInt(), count);
return true;
}
if (!node.has("expression")) {
return true; // ignore
}
String expression = node.get("expression").asText();
MapContext context = getInput(node.get("inputs"));
Tensor expect = getTensor(node.get("result").get("expect").asText());
Tensor result = evaluate(expression, context);
boolean equals = Tensor.equals(result, expect);
if (!equals) {
System.out.println(count + " : Tensors not equal. Result: " + result.toString() + " Expected: " + expect.toString() + " -> expression \"" + expression + "\"");
}
return equals;
} catch (Exception e) {
System.out.println(count + " : " + e.toString());
}
return false;
}
private Tensor evaluate(String expression, MapContext context) throws ParseException {
Value value = new RankingExpression(expression).evaluate(context);
if (!(value instanceof TensorValue)) {
throw new IllegalArgumentException("Result is not a tensor");
}
return ((TensorValue)value).asTensor();
}
private MapContext getInput(JsonNode inputs) {
MapContext context = new MapContext();
for (Iterator<String> i = inputs.fieldNames(); i.hasNext(); ) {
String name = i.next();
String value = inputs.get(name).asText();
Tensor tensor = getTensor(value);
context.put(name, new TensorValue(tensor));
}
return context;
}
private Tensor getTensor(String binaryRepresentation) {
byte[] bin = getBytes(binaryRepresentation);
return TypedBinaryFormat.decode(Optional.empty(), GrowableByteBuffer.wrap(bin));
}
private byte[] getBytes(String binaryRepresentation) {
return parseHexValue(binaryRepresentation.substring(2));
}
private byte[] parseHexValue(String s) {
final int len = s.length();
byte[] bytes = new byte[len/2];
for (int i = 0; i < len; i += 2) {
int c1 = hexValue(s.charAt(i)) << 4;
int c2 = hexValue(s.charAt(i + 1));
bytes[i/2] = (byte)(c1 + c2);
}
return bytes;
}
private int hexValue(Character c) {
if (c >= 'a' && c <= 'f') {
return c - 'a' + 10;
} else if (c >= 'A' && c <= 'F') {
return c - 'A' + 10;
} else if (c >= '0' && c <= '9') {
return c - '0';
}
throw new IllegalArgumentException("Hex contains illegal characters");
}
}
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