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package com.yahoo.tensor.functions;
import com.yahoo.tensor.Tensor;
import org.junit.Test;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;
/**
* @author bratseth
*/
public class ConcatTestCase {
@Test
public void testConcatNumbers() {
Tensor a = Tensor.from("{1}");
Tensor b = Tensor.from("{2}");
assertEquals(Tensor.from("tensor(x[2]):{ {x:0}:1, {x:1}:2 }"), a.concat(b, "x"));
assertEquals(Tensor.from("tensor(x[2]):{ {x:0}:2, {x:1}:1 }"), b.concat(a, "x"));
}
@Test
public void testConcatEqualShapes() {
Tensor a = Tensor.from("tensor(x[]):{ {x:0}:1, {x:1}:2, {x:2}:3 }");
Tensor b = Tensor.from("tensor(x[]):{ {x:0}:4, {x:1}:5, {x:2}:6 }");
assertEquals(Tensor.from("tensor(x[6]):{ {x:0}:1, {x:1}:2, {x:2}:3, {x:3}:4, {x:4}:5, {x:5}:6 }"), a.concat(b, "x"));
assertEquals(Tensor.from("tensor(x[3],y[2]):{ {x:0,y:0}:1, {x:1,y:0}:2, {x:2,y:0}:3, " +
"{x:0,y:1}:4, {x:1,y:1}:5, {x:2,y:1}:6 }"), a.concat(b, "y"));
}
@Test
public void testConcatNumberAndVector() {
Tensor a = Tensor.from("{1}");
Tensor b = Tensor.from("tensor(x[]):{ {x:0}:2, {x:1}:3, {x:2}:4 }");
assertEquals(Tensor.from("tensor(x[4]):{ {x:0}:1, {x:1}:2, {x:2}:3, {x:3}:4 }"), a.concat(b, "x"));
assertEquals(Tensor.from("tensor(x[3],y[2]):{ {x:0,y:0}:1, {x:1,y:0}:1, {x:2,y:0}:1, " +
"{x:0,y:1}:2, {x:1,y:1}:3, {x:2,y:1}:4 }"), a.concat(b, "y"));
}
@Test
public void testUnequalSizesSameDimension() {
Tensor a = Tensor.from("tensor(x[]):{ {x:0}:1, {x:1}:2 }");
Tensor b = Tensor.from("tensor(x[]):{ {x:0}:4, {x:1}:5, {x:2}:6 }");
assertEquals(Tensor.from("tensor(x[5]):{ {x:0}:1, {x:1}:2, {x:2}:4, {x:3}:5, {x:4}:6 }"), a.concat(b, "x"));
try {
a.concat(b, "y");
fail("Expected exception");
} catch (IllegalArgumentException expected) {
// success
}
}
@Test
public void testUnequalEqualSizesDifferentDimension() {
Tensor a = Tensor.from("tensor(x[]):{ {x:0}:1, {x:1}:2 }");
Tensor b = Tensor.from("tensor(y[]):{ {y:0}:4, {y:1}:5, {y:2}:6 }");
assertEquals(Tensor.from("tensor(x[3],y[3]):{{x:0,y:0}:1.0,{x:0,y:1}:1.0,{x:0,y:2}:1.0,{x:1,y:0}:2.0,{x:1,y:1}:2.0,{x:1,y:2}:2.0,{x:2,y:0}:4.0,{x:2,y:1}:5.0,{x:2,y:2}:6.0}"), a.concat(b, "x"));
assertEquals(Tensor.from("tensor(x[2],y[4]):{{x:0,y:0}:1.0,{x:0,y:1}:4.0,{x:0,y:2}:5.0,{x:0,y:3}:6.0,{x:1,y:0}:2.0,{x:1,y:1}:4.0,{x:1,y:2}:5.0,{x:1,y:3}:6.0}"), a.concat(b, "y"));
assertEquals(Tensor.from("tensor(x[2],y[3],z[2]):{{x:0,y:0,z:0}:1.0,{x:0,y:0,z:1}:4.0,{x:0,y:1,z:0}:1.0,{x:0,y:1,z:1}:5.0,{x:0,y:2,z:0}:1.0,{x:0,y:2,z:1}:6.0,{x:1,y:0,z:0}:2.0,{x:1,y:0,z:1}:4.0,{x:1,y:1,z:0}:2.0,{x:1,y:1,z:1}:5.0,{x:1,y:2,z:0}:2.0,{x:1,y:2,z:1}:6.0}"), a.concat(b, "z"));
}
@Test
public void testDimensionsubset() {
Tensor a = Tensor.from("tensor(x[],y[]):{ {x:0,y:0}:1, {x:1,y:0}:2, {x:0,y:1}:3, {x:1,y:1}:4 }");
Tensor b = Tensor.from("tensor(y[2]):{ {y:0}:5, {y:1}:6 }");
assertEquals(Tensor.from("tensor(x[3],y[2]):{{x:0,y:0}:1.0,{x:0,y:1}:3.0,{x:1,y:0}:2.0,{x:1,y:1}:4.0,{x:2,y:0}:5.0,{x:2,y:1}:6.0}"), a.concat(b, "x"));
assertEquals(Tensor.from("tensor(x[2],y[4]):{{x:0,y:0}:1.0,{x:0,y:1}:3.0,{x:0,y:2}:5.0,{x:0,y:3}:6.0,{x:1,y:0}:2.0,{x:1,y:1}:4.0,{x:1,y:2}:5.0,{x:1,y:3}:6.0}"), a.concat(b, "y"));
}
}
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