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// Copyright 2006 Google Inc. All Rights Reserved.
//
// Licensed 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 com.google.devtools.build.lib.syntax;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;
import com.google.common.collect.Sets;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/**
* Tests of Environment.
*/
@RunWith(JUnit4.class)
public class EnvironmentTest extends AbstractEvaluationTestCase {
// Test the API directly
@Test
public void testLookupAndUpdate() throws Exception {
Environment env = new Environment();
try {
env.lookup("foo");
fail();
} catch (Environment.NoSuchVariableException e) {
assertEquals("no such variable: foo", e.getMessage());
}
env.update("foo", "bar");
assertEquals("bar", env.lookup("foo"));
}
@Test
public void testLookupWithDefault() throws Exception {
Environment env = new Environment();
assertEquals(21, env.lookup("VERSION", 21));
env.update("VERSION", 42);
assertEquals(42, env.lookup("VERSION", 21));
}
@Test
public void testDoubleUpdateSucceeds() throws Exception {
Environment env = new Environment();
env.update("VERSION", 42);
assertEquals(42, env.lookup("VERSION"));
env.update("VERSION", 43);
assertEquals(43, env.lookup("VERSION"));
}
// Test assign through interpreter, lookup through API:
@Test
public void testAssign() throws Exception {
Environment env = new Environment();
try {
env.lookup("foo");
fail();
} catch (Environment.NoSuchVariableException e) {
assertEquals("no such variable: foo", e.getMessage());
}
exec(parseStmt("foo = 'bar'"), env);
assertEquals("bar", env.lookup("foo"));
}
// Test update through API, reference through interpreter:
@Test
public void testReference() throws Exception {
Environment env = new Environment();
try {
eval(parseExpr("foo"), env);
fail();
} catch (EvalException e) {
assertEquals("name 'foo' is not defined", e.getMessage());
}
env.update("foo", "bar");
assertEquals("bar", eval(parseExpr("foo"), env));
}
// Test assign and reference through interpreter:
@Test
public void testAssignAndReference() throws Exception {
Environment env = new Environment();
try {
eval(parseExpr("foo"), env);
fail();
} catch (EvalException e) {
assertEquals("name 'foo' is not defined", e.getMessage());
}
exec(parseStmt("foo = 'bar'"), env);
assertEquals("bar", eval(parseExpr("foo"), env));
}
@Test
public void testGetVariableNames() throws Exception {
Environment env = new Environment();
env.update("foo", "bar");
env.update("wiz", 3);
Environment nestedEnv = new Environment(env);
nestedEnv.update("foo", "bat");
nestedEnv.update("quux", 42);
assertEquals(Sets.newHashSet("True", "False", "None", "foo", "wiz"), env.getVariableNames());
assertEquals(Sets.newHashSet("True", "False", "None", "foo", "wiz", "quux"),
nestedEnv.getVariableNames());
}
@Test
public void testToString() throws Exception {
Environment env = new Environment();
env.update("subject", new StringLiteral("Hello, 'world'.", '\''));
env.update("from", new StringLiteral("Java", '"'));
assertEquals("Environment{False -> false, None -> None, True -> true, from -> \"Java\", "
+ "subject -> 'Hello, \\'world\\'.', }", env.toString());
}
@Test
public void testBindToNullThrowsException() throws Exception {
try {
new Environment().update("some_name", null);
fail();
} catch (NullPointerException e) {
assertEquals("update(value == null)", e.getMessage());
}
}
}
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