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// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.tensor;
import org.junit.Test;
import static org.hamcrest.Matchers.containsString;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertThat;
import static org.junit.Assert.fail;
/**
* @author geirst
*/
public class TensorTypeTestCase {
@Test
public void requireThatAnEmptyTensorTypeCanBeSpecified() {
assertTensorType("tensor()");
}
@Test
public void requireThatBoundIndexedDimensionsCanBeSpecified() {
assertTensorType("tensor(x[5])");
assertTensorType("tensor(x[5],y[10],z[100])");
assertTensorType("tensor(x[5],y[10],z[100])", "tensor( x[5] , y[10] , z[100] )");
assertTensorType("tensor(baR_09[10])");
}
@Test
public void requireThatUnboundIndexedDimensionsCanBeSpecified() {
assertTensorType("tensor(x[])");
assertTensorType("tensor(x[],y[],z[])");
assertTensorType("tensor(x[],y[],z[])", "tensor( x[] , y[] , z[] )");
assertTensorType("tensor(baR_09[])");
}
@Test
public void requireThatMappedDimensionsCanBeSpecified() {
assertTensorType("tensor(x{})");
assertTensorType("tensor(x{},y{},z{})");
assertTensorType("tensor(x{},y{},z{})", "tensor( x{} , y{} , z{} )");
assertTensorType("tensor(baR_09{})");
}
@Test
public void requireThatIndexedBoundDimensionMustHaveNonZeroSize() {
assertIllegalTensorType("tensor(x[0])", "Size of bound dimension 'x' must be at least 1");
}
@Test
public void requireThatDimensionsMustHaveUniqueNames() {
assertIllegalTensorType("tensor(x[10],y[20],x[30])", "Could not add dimension x[30] as this dimension is already present");
assertIllegalTensorType("tensor(x{},y{},x{})", "Could not add dimension x{} as this dimension is already present");
}
@Test
public void requireThatIllegalSyntaxInSpecThrowsException() {
assertIllegalTensorType("foo(x[10])", "Tensor type spec must start with 'tensor(' and end with ')', but was 'foo(x[10])'");
assertIllegalTensorType("tensor(x_@[10])", "Failed parsing element 'x_@[10]' in type spec 'tensor(x_@[10])'");
assertIllegalTensorType("tensor(x[10a])", "Failed parsing element 'x[10a]' in type spec 'tensor(x[10a])'");
assertIllegalTensorType("tensor(x{10})", "Failed parsing element 'x{10}' in type spec 'tensor(x{10})'");
}
private static void assertTensorType(String typeSpec) {
assertTensorType(typeSpec, typeSpec);
}
private static void assertTensorType(String expected, String typeSpec) {
assertEquals(expected, TensorType.fromSpec(typeSpec).toString());
}
private static void assertIllegalTensorType(String typeSpec, String messageSubstring) {
try {
TensorType.fromSpec(typeSpec);
fail("Expoected exception to be thrown with message: '" + messageSubstring + "'");
} catch (IllegalArgumentException e) {
assertThat(e.getMessage(), containsString(messageSubstring));
}
}
}
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