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package org.zwobble.couscous.tests.backends.python;
import org.junit.Test;
import org.zwobble.couscous.backends.python.ast.PythonClassNode;
import org.zwobble.couscous.backends.python.ast.PythonFunctionDefinitionNode;
import org.zwobble.couscous.backends.python.ast.PythonModuleNode;
import static org.junit.Assert.assertEquals;
import static org.zwobble.couscous.backends.python.PythonSerializer.serialize;
import static org.zwobble.couscous.backends.python.ast.PythonListNode.pythonList;
import static org.zwobble.couscous.backends.python.ast.PythonAssignmentNode.pythonAssignment;
import static org.zwobble.couscous.backends.python.ast.PythonAttributeAccessNode.pythonAttributeAccess;
import static org.zwobble.couscous.backends.python.ast.PythonBinaryOperation.pythonAnd;
import static org.zwobble.couscous.backends.python.ast.PythonBinaryOperation.pythonIs;
import static org.zwobble.couscous.backends.python.ast.PythonBooleanLiteralNode.pythonBooleanLiteral;
import static org.zwobble.couscous.backends.python.ast.PythonCallNode.pythonCall;
import static org.zwobble.couscous.backends.python.ast.PythonConditionalExpressionNode.pythonConditionalExpression;
import static org.zwobble.couscous.backends.python.ast.PythonGetSliceNode.pythonGetSlice;
import static org.zwobble.couscous.backends.python.ast.PythonIfStatementNode.pythonIfStatement;
import static org.zwobble.couscous.backends.python.ast.PythonImportAliasNode.pythonImportAlias;
import static org.zwobble.couscous.backends.python.ast.PythonImportNode.pythonImport;
import static org.zwobble.couscous.backends.python.ast.PythonIntegerLiteralNode.pythonIntegerLiteral;
import static org.zwobble.couscous.backends.python.ast.PythonModuleNode.pythonModule;
import static org.zwobble.couscous.backends.python.ast.PythonNotNode.pythonNot;
import static org.zwobble.couscous.backends.python.ast.PythonPassNode.PASS;
import static org.zwobble.couscous.backends.python.ast.PythonReturnNode.pythonReturn;
import static org.zwobble.couscous.backends.python.ast.PythonStringLiteralNode.pythonStringLiteral;
import static org.zwobble.couscous.backends.python.ast.PythonVariableReferenceNode.pythonVariableReference;
import static org.zwobble.couscous.backends.python.ast.PythonWhileNode.pythonWhile;
import static org.zwobble.couscous.util.ExtraLists.list;
public class PythonSerializerTests {
@Test
public void integersAreNotBoxed() {
String output = serialize(pythonIntegerLiteral(42));
assertEquals("42", output);
}
@Test
public void stringsAreNotBoxed() {
String output = serialize(pythonStringLiteral("blah"));
assertEquals("\"blah\"", output);
}
@Test
public void stringsAreEscaped() {
String output = serialize(pythonStringLiteral("\"\n\r\t\\"));
assertEquals("\"\\\"\\n\\r\\t\\\\\"", output);
}
@Test
public void booleansAreNotBoxed() {
assertEquals("True", serialize(pythonBooleanLiteral(true)));
assertEquals("False", serialize(pythonBooleanLiteral(false)));
}
@Test
public void variableReferenceIsSerializedAsIdentifier() {
assertEquals("blah", serialize(pythonVariableReference("blah")));
}
@Test
public void elementsOfArrayAreSerialised() {
assertEquals("[]", serialize(pythonList(list())));
assertEquals("[one]", serialize(pythonList(list(pythonVariableReference("one")))));
assertEquals(
"[one, two]",
serialize(pythonList(list(
pythonVariableReference("one"),
pythonVariableReference("two")))));
}
@Test
public void conditionalExpressionIsSerializedUsingSubExpressions() {
assertEquals("1 if True else 2", serialize(pythonConditionalExpression(pythonBooleanLiteral(true), pythonIntegerLiteral(1), pythonIntegerLiteral(2))));
}
@Test
public void attributeAccessIsSerializedUsingSubExpression() {
assertEquals("x.y", serialize(pythonAttributeAccess(pythonVariableReference("x"), "y")));
}
@Test
public void callIsSerializedUsingSubExpression() {
assertEquals("f(x, y)", serialize(pythonCall(pythonVariableReference("f"), list(pythonVariableReference("x"), pythonVariableReference("y")))));
}
@Test
public void getSliceIsSerializedUsingSubExpression() {
assertEquals("x[y:z]", serialize(pythonGetSlice(pythonVariableReference("x"), list(pythonVariableReference("y"), pythonVariableReference("z")))));
}
@Test
public void notOperationIsSerializedUsingSubExpression() {
assertEquals("not x", serialize(pythonNot(pythonVariableReference("x"))));
}
@Test
public void binaryOperationIsSerializedUsingSubExpressions() {
assertEquals(
"x is y",
serialize(pythonIs(pythonVariableReference("x"), pythonVariableReference("y"))));
}
@Test
public void operationsWithSameOrLowerPrecedenceIsParenthesised() {
assertEquals(
"not (x and y)",
serialize(pythonNot(pythonAnd(pythonVariableReference("x"), pythonVariableReference("y")))));
assertEquals(
"not x and y",
serialize(pythonAnd(pythonNot(pythonVariableReference("x")), pythonVariableReference("y"))));
}
@Test
public void returnKeywordIsUsedForReturns() {
String output = serialize(pythonReturn(pythonIntegerLiteral(42)));
assertEquals("return 42\n", output);
}
@Test
public void passStatementIsSerializedAsPassKeyword() {
final java.lang.Object output = serialize(PASS);
assertEquals("pass\n", output);
}
@Test
public void emptyFunctionHasPassStatement() {
PythonFunctionDefinitionNode function = PythonFunctionDefinitionNode.builder("empty").build();
String output = serialize(function);
assertEquals("def empty():\n pass\n", output);
}
@Test
public void functionArgumentsAreSerializedWithName() {
PythonFunctionDefinitionNode function = PythonFunctionDefinitionNode.builder("empty")
.argument("one")
.argument("two")
.build();
String output = serialize(function);
assertEquals("def empty(one, two):\n pass\n", output);
}
@Test
public void emptyClassHasPassStatement() {
PythonClassNode classNode = PythonClassNode.builder("Empty").build();
String output = serialize(classNode);
assertEquals("class Empty(object):\n pass\n", output);
}
@Test
public void bodiesOfBlocksAreIndented() {
PythonClassNode classNode = PythonClassNode.builder("Foo")
.statement(PythonFunctionDefinitionNode.builder("one").build())
.statement(PythonFunctionDefinitionNode.builder("two").build())
.build();
String output = serialize(classNode);
String expectedOutput = "class Foo(object):\n def one():\n pass\n def two():\n pass\n";
assertEquals(expectedOutput, output);
}
@Test
public void assignmentIsSerializedWithEqualsSymbolSeparatingTargetAndValue() {
String output = serialize(pythonAssignment(
pythonVariableReference("x"),
pythonIntegerLiteral(42)));
assertEquals("x = 42\n", output);
}
@Test
public void importIsSerializedUsingImportKeyword() {
String output = serialize(pythonImport(
"com.example",
list(pythonImportAlias("Program"))));
assertEquals("from com.example import Program\n", output);
}
@Test
public void importAliasesAreSeparatedByCommas() {
String output = serialize(pythonImport(
"com.example",
list(pythonImportAlias("Program"),pythonImportAlias("Runner"))));
assertEquals("from com.example import Program, Runner\n", output);
}
@Test
public void ifStatementIsSerializedWithIfKeyword() {
String output = serialize(pythonIfStatement(
pythonBooleanLiteral(true),
list(pythonReturn(pythonIntegerLiteral(1))),
list(pythonReturn(pythonIntegerLiteral(2)))));
assertEquals("if True:\n return 1\nelse:\n return 2\n", output);
}
@Test
public void whileIsSerializedWithWhileKeyword() {
String output = serialize(pythonWhile(
pythonBooleanLiteral(true),
list(pythonReturn(pythonIntegerLiteral(1)))));
assertEquals("while True:\n return 1\n", output);
}
@Test
public void moduleIsSerializedStatements() {
PythonModuleNode classNode = pythonModule(list(PASS));
String output = serialize(classNode);
assertEquals("pass\n", output);
}
}
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