src/test/java/com/google/devtools/build/lib/syntax/TypeTest.java - bazel - Git at Google

 // Copyright 2006 The Bazel Authors. 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 com.google.common.truth.Truth.assertThat;
 import static org.junit.Assert.fail;

 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.ImmutableMap;
 import com.google.common.collect.Lists;
 import com.google.common.collect.Sets;
 import com.google.devtools.build.lib.cmdline.Label;
 import com.google.devtools.build.lib.collect.nestedset.NestedSetBuilder;
 import com.google.devtools.build.lib.collect.nestedset.Order;
 import com.google.devtools.build.lib.packages.BuildType;
 import com.google.devtools.build.lib.packages.License;
 import com.google.devtools.build.lib.packages.TriState;
 import com.google.devtools.build.lib.syntax.SkylarkList.MutableList;
 import com.google.devtools.build.lib.syntax.SkylarkList.Tuple;
 import com.google.devtools.build.lib.syntax.Type.ConversionException;
 import com.google.devtools.build.lib.testutil.MoreAsserts;
 import java.util.Arrays;
 import java.util.List;
 import java.util.Map;
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.JUnit4;

 /**
  * Test of type-conversions using Type.
  */
 @RunWith(JUnit4.class)
 public class TypeTest {

   private Label currentRule;

   @Before
   public final void setCurrentRule() throws Exception  {
     this.currentRule = Label.parseAbsolute("//quux:baz", ImmutableMap.of());
   }

   @Test
   public void testInteger() throws Exception {
     Object x = 3;
     assertThat(Type.INTEGER.convert(x, null)).isEqualTo(x);
     assertThat(collectLabels(Type.INTEGER, x)).isEmpty();
   }

   @Test
   public void testNonInteger() throws Exception {
     try {
       Type.INTEGER.convert("foo", null);
       fail();
     } catch (Type.ConversionException e) {
       // This does not use assertMessageContainsWordsWithQuotes because at least
       // one test should test exact wording (but they all shouldn't to make
       // changing/improving the messages easy).
       assertThat(e).hasMessage("expected value of type 'int', but got \"foo\" (string)");
     }
   }

   // Ensure that types are reported correctly.
   @Test
   public void testTypeErrorMessage() throws Exception {
     try {
       Type.STRING_LIST.convert("[(1,2), 3, 4]", "myexpr", null);
       fail();
     } catch (Type.ConversionException e) {
       assertThat(e).hasMessage("expected value of type 'list(string)' for myexpr, "
           + "but got \"[(1,2), 3, 4]\" (string)");
     }
   }

   @Test
   public void testString() throws Exception {
     Object s = "foo";
     assertThat(Type.STRING.convert(s, null)).isEqualTo(s);
     assertThat(collectLabels(Type.STRING, s)).isEmpty();
   }

   @Test
   public void testNonString() throws Exception {
     try {
       Type.STRING.convert(3, null);
       fail();
     } catch (Type.ConversionException e) {
       assertThat(e).hasMessage("expected value of type 'string', but got 3 (int)");
     }
   }

   @Test
   public void testBoolean() throws Exception {
     Object myTrue = true;
     Object myFalse = false;
     assertThat(Type.BOOLEAN.convert(1, null)).isEqualTo(Boolean.TRUE);
     assertThat(Type.BOOLEAN.convert(0, null)).isEqualTo(Boolean.FALSE);
     assertThat(Type.BOOLEAN.convert(true, null)).isTrue();
     assertThat(Type.BOOLEAN.convert(myTrue, null)).isTrue();
     assertThat(Type.BOOLEAN.convert(false, null)).isFalse();
     assertThat(Type.BOOLEAN.convert(myFalse, null)).isFalse();
     assertThat(collectLabels(Type.BOOLEAN, myTrue)).isEmpty();
   }

   @Test
   public void testNonBoolean() throws Exception {
     try {
       Type.BOOLEAN.convert("unexpected", null);
       fail();
     } catch (Type.ConversionException e) {
       assertThat(e).hasMessage(
           "expected value of type 'int', but got \"unexpected\" (string)");
     }
     // Integers other than [0, 1] should fail.
     try {
       Type.BOOLEAN.convert(2, null);
       fail();
     } catch (Type.ConversionException e) {
       assertThat(e).hasMessageThat().isEqualTo("boolean is not one of [0, 1]");
     }
     try {
       Type.BOOLEAN.convert(-1, null);
       fail();
     } catch (Type.ConversionException e) {
       assertThat(e).hasMessageThat().isEqualTo("boolean is not one of [0, 1]");
     }
   }

   @Test
   public void testTriState() throws Exception {
     assertThat(BuildType.TRISTATE.convert(1, null)).isEqualTo(TriState.YES);
     assertThat(BuildType.TRISTATE.convert(0, null)).isEqualTo(TriState.NO);
     assertThat(BuildType.TRISTATE.convert(-1, null)).isEqualTo(TriState.AUTO);
     assertThat(BuildType.TRISTATE.convert(true, null)).isEqualTo(TriState.YES);
     assertThat(BuildType.TRISTATE.convert(false, null)).isEqualTo(TriState.NO);
     assertThat(BuildType.TRISTATE.convert(TriState.YES, null)).isEqualTo(TriState.YES);
     assertThat(BuildType.TRISTATE.convert(TriState.NO, null)).isEqualTo(TriState.NO);
     assertThat(BuildType.TRISTATE.convert(TriState.AUTO, null)).isEqualTo(TriState.AUTO);
     assertThat(collectLabels(BuildType.TRISTATE, TriState.YES)).isEmpty();
   }

   @Test
   public void testTriStateDoesNotAcceptArbitraryIntegers() throws Exception {
     List<Integer> listOfCases = Lists.newArrayList(2, 3, -5, -2, 20);
     for (Object entry : listOfCases) {
       try {
         BuildType.TRISTATE.convert(entry, null);
         fail();
       } catch (Type.ConversionException e) {
         // Expected.
       }
     }
   }

   @Test
   public void testTriStateDoesNotAcceptStrings() throws Exception {
     List<String> listOfCases = Lists.newArrayList("bad", "true", "auto", "false");
     for (Object entry : listOfCases) {
       try {
         BuildType.TRISTATE.convert(entry, null);
         fail();
       } catch (Type.ConversionException e) {
         // Expected.
       }
     }
   }

   @Test
   public void testTagConversion() throws Exception {
     assertThat(Type.BOOLEAN.toTagSet(true, "attribute"))
         .containsExactlyElementsIn(Sets.newHashSet("attribute"));
     assertThat(Type.BOOLEAN.toTagSet(false, "attribute"))
         .containsExactlyElementsIn(Sets.newHashSet("noattribute"));

     assertThat(Type.STRING.toTagSet("whiskey", "preferred_cocktail"))
         .containsExactlyElementsIn(Sets.newHashSet("whiskey"));

     assertThat(
             Type.STRING_LIST.toTagSet(
                 Lists.newArrayList("cheddar", "ementaler", "gruyere"), "cheeses"))
         .containsExactlyElementsIn(Sets.newHashSet("cheddar", "ementaler", "gruyere"));
   }

   @Test
   public void testIllegalTagConversionByType() throws Exception {
     try {
       BuildType.TRISTATE.toTagSet(TriState.AUTO, "some_tristate");
       fail("Expect UnsuportedOperationException");
     } catch (UnsupportedOperationException e) {
       // Success.
     }
     try {
       BuildType.LICENSE.toTagSet(License.NO_LICENSE, "output_license");
       fail("Expect UnsuportedOperationException");
     } catch (UnsupportedOperationException e) {
       // Success.
     }
   }

   @Test
   public void testIllegalTagConversIonFromNullOnSupportedType() throws Exception {
     try {
       Type.BOOLEAN.toTagSet(null, "a_boolean");
       fail("Expect UnsuportedOperationException");
     } catch (IllegalStateException e) {
       // Success.
     }
   }

   @Test
   public void testLabel() throws Exception {
     Label label = Label.parseAbsolute("//foo:bar", ImmutableMap.of());
     assertThat(BuildType.LABEL.convert("//foo:bar", null, currentRule)).isEqualTo(label);
     assertThat(collectLabels(BuildType.LABEL, label)).containsExactly(label);
   }

   @Test
   public void testNodepLabel() throws Exception {
     Label label = Label.parseAbsolute("//foo:bar", ImmutableMap.of());
     assertThat(BuildType.NODEP_LABEL.convert("//foo:bar", null, currentRule)).isEqualTo(label);
     assertThat(collectLabels(BuildType.NODEP_LABEL, label)).containsExactly(label);
   }

   @Test
   public void testRelativeLabel() throws Exception {
     assertThat(BuildType.LABEL.convert(":wiz", null, currentRule))
         .isEqualTo(Label.parseAbsolute("//quux:wiz", ImmutableMap.of()));
     assertThat(BuildType.LABEL.convert("wiz", null, currentRule))
         .isEqualTo(Label.parseAbsolute("//quux:wiz", ImmutableMap.of()));
     try {
       BuildType.LABEL.convert("wiz", null);
       fail();
     } catch (ConversionException e) {
       /* ok */
     }
   }

   @Test
   public void testInvalidLabel() throws Exception {
     try {
       BuildType.LABEL.convert("not//a label", null, currentRule);
       fail();
     } catch (Type.ConversionException e) {
       MoreAsserts.assertContainsWordsWithQuotes(e.getMessage(), "not//a label");
     }
   }

   @Test
   public void testNonLabel() throws Exception {
     try {
       BuildType.LABEL.convert(3, null);
       fail();
     } catch (Type.ConversionException e) {
       assertThat(e).hasMessage("expected value of type 'string', but got 3 (int)");
     }
   }

   @Test
   public void testStringList() throws Exception {
     Object input = Arrays.asList("foo", "bar", "wiz");
     List<String> converted =
         Type.STRING_LIST.convert(input, null);
     assertThat(converted).isEqualTo(input);
     assertThat(converted).isNotSameAs(input);
     assertThat(collectLabels(Type.STRING_LIST, input)).isEmpty();
   }

   @Test
   public void testStringDict() throws Exception {
     Object input = ImmutableMap.of("foo", "bar",
                                    "wiz", "bang");
     Map<String, String> converted = Type.STRING_DICT.convert(input, null);
     assertThat(converted).isEqualTo(input);
     assertThat(converted).isNotSameAs(input);
     assertThat(collectLabels(Type.STRING_DICT, converted)).isEmpty();
   }

   @Test
   public void testStringDictBadElements() throws Exception {
     Object input = ImmutableMap.of("foo", MutableList.of(null, "bar", "baz"), "wiz", "bang");
     try {
       Type.STRING_DICT.convert(input, null);
       fail();
     } catch (Type.ConversionException e) {
       assertThat(e).hasMessage("expected value of type 'string' for dict value element, "
           + "but got [\"bar\", \"baz\"] (list)");
     }
   }

   @Test
   public void testNonStringList() throws Exception {
     try {
       Type.STRING_LIST.convert(3, "blah");
       fail();
     } catch (Type.ConversionException e) {
       assertThat(e).hasMessage("expected value of type 'list(string)' for blah, but got 3 (int)");
     }
   }

   @Test
   public void testStringListBadElements() throws Exception {
     Object input = Arrays.<Object>asList("foo", "bar", 1);
     try {
       Type.STRING_LIST.convert(input, "argument quux");
       fail();
     } catch (Type.ConversionException e) {
       assertThat(e).hasMessage(
           "expected value of type 'string' for element 2 of argument quux, but got 1 (int)");
     }
   }

   @Test
   public void testListDepsetConversion() throws Exception {
     Object input = SkylarkNestedSet.of(
         String.class,
         NestedSetBuilder.create(Order.STABLE_ORDER, "a", "b", "c"));
     Type.STRING_LIST.convert(input, null);
   }

   @Test
   public void testLabelList() throws Exception {
     Object input = Arrays.asList("//foo:bar", ":wiz");
     List<Label> converted =
       BuildType.LABEL_LIST.convert(input , null, currentRule);
     List<Label> expected =
         Arrays.asList(
             Label.parseAbsolute("//foo:bar", ImmutableMap.of()),
             Label.parseAbsolute("//quux:wiz", ImmutableMap.of()));
     assertThat(converted).isEqualTo(expected);
     assertThat(converted).isNotSameAs(expected);
     assertThat(collectLabels(BuildType.LABEL_LIST, converted)).containsExactlyElementsIn(expected);
   }

   @Test
   public void testNonLabelList() throws Exception {
     try {
       BuildType.LABEL_LIST.convert(3, "foo", currentRule);
       fail();
     } catch (Type.ConversionException e) {
       assertThat(e).hasMessage("expected value of type 'list(label)' for foo, but got 3 (int)");
     }
   }

   @Test
   public void testLabelListBadElements() throws Exception {
     Object list = Arrays.<Object>asList("//foo:bar", 2, "foo");
     try {
       BuildType.LABEL_LIST.convert(list, null, currentRule);
       fail();
     } catch (Type.ConversionException e) {
       assertThat(e).hasMessage(
           "expected value of type 'string' for element 1 of null, but got 2 (int)");
     }
   }

   @Test
   public void testLabelListSyntaxError() throws Exception {
     Object list = Arrays.<Object>asList("//foo:bar/..", "foo");
     try {
       BuildType.LABEL_LIST.convert(list, "myexpr", currentRule);
       fail();
     } catch (Type.ConversionException e) {
       assertThat(e).hasMessage("invalid label '//foo:bar/..' in element 0 of myexpr: "
           + "invalid target name 'bar/..': "
           + "target names may not contain up-level references '..'");
     }
   }

   @Test
   public void testStringListDict() throws Exception {
     Object input = ImmutableMap.of("foo", Arrays.asList("foo", "bar"),
                                    "wiz", Arrays.asList("bang"));
     Map<String, List<String>> converted =
         Type.STRING_LIST_DICT.convert(input, null, currentRule);
     Map<?, ?> expected = ImmutableMap.<String, List<String>>of(
             "foo", Arrays.asList("foo", "bar"),
             "wiz", Arrays.asList("bang"));
     assertThat(converted).isEqualTo(expected);
     assertThat(converted).isNotSameAs(expected);
     assertThat(collectLabels(Type.STRING_LIST_DICT, converted)).isEmpty();
   }

   @Test
   public void testStringListDictBadFirstElement() throws Exception {
     Object input = ImmutableMap.of(2, Arrays.asList("foo", "bar"),
                                    "wiz", Arrays.asList("bang"));
     try {
       Type.STRING_LIST_DICT.convert(input, null, currentRule);
       fail();
     } catch (Type.ConversionException e) {
       assertThat(e).hasMessage(
           "expected value of type 'string' for dict key element, but got 2 (int)");
     }
   }

   @Test
   public void testStringListDictBadSecondElement() throws Exception {
     Object input = ImmutableMap.of("foo", "bar",
                                    "wiz", Arrays.asList("bang"));
     try {
       Type.STRING_LIST_DICT.convert(input, null, currentRule);
       fail();
     } catch (Type.ConversionException e) {
       assertThat(e).hasMessage(
           "expected value of type 'list(string)' for dict value element, "
           + "but got \"bar\" (string)");
     }
   }

   @Test
   public void testStringListDictBadElements1() throws Exception {
     Object input = ImmutableMap.of(Tuple.of("foo"), Tuple.of("bang"), "wiz", Tuple.of("bang"));
     try {
       Type.STRING_LIST_DICT.convert(input, null);
       fail();
     } catch (Type.ConversionException e) {
       assertThat(e).hasMessage("expected value of type 'string' for dict key element, but got "
           + "(\"foo\",) (tuple)");
     }
   }

   @Test
   public void testStringDictThrowsConversionException() throws Exception {
     try {
       Type.STRING_DICT.convert("some string", null);
       fail();
     } catch (ConversionException e) {
       assertThat(e).hasMessage(
           "expected value of type 'dict(string, string)', but got \"some string\" (string)");
     }
   }

   private static ImmutableList<Label> collectLabels(Type<?> type, Object value) {
     final ImmutableList.Builder<Label> result = ImmutableList.builder();
     type.visitLabels((label, dummy) -> result.add(label), value, /*context=*/ null);
     return result.build();
   }
 }
	// Copyright 2006 The Bazel Authors. 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 com.google.common.truth.Truth.assertThat;
	import static org.junit.Assert.fail;

	import com.google.common.collect.ImmutableList;
	import com.google.common.collect.ImmutableMap;
	import com.google.common.collect.Lists;
	import com.google.common.collect.Sets;
	import com.google.devtools.build.lib.cmdline.Label;
	import com.google.devtools.build.lib.collect.nestedset.NestedSetBuilder;
	import com.google.devtools.build.lib.collect.nestedset.Order;
	import com.google.devtools.build.lib.packages.BuildType;
	import com.google.devtools.build.lib.packages.License;
	import com.google.devtools.build.lib.packages.TriState;
	import com.google.devtools.build.lib.syntax.SkylarkList.MutableList;
	import com.google.devtools.build.lib.syntax.SkylarkList.Tuple;
	import com.google.devtools.build.lib.syntax.Type.ConversionException;
	import com.google.devtools.build.lib.testutil.MoreAsserts;
	import java.util.Arrays;
	import java.util.List;
	import java.util.Map;
	import org.junit.Before;
	import org.junit.Test;
	import org.junit.runner.RunWith;
	import org.junit.runners.JUnit4;

	/**
	* Test of type-conversions using Type.
	*/
	@RunWith(JUnit4.class)
	public class TypeTest {

	private Label currentRule;

	@Before
	public final void setCurrentRule() throws Exception {
	this.currentRule = Label.parseAbsolute("//quux:baz", ImmutableMap.of());
	}

	@Test
	public void testInteger() throws Exception {
	Object x = 3;
	assertThat(Type.INTEGER.convert(x, null)).isEqualTo(x);
	assertThat(collectLabels(Type.INTEGER, x)).isEmpty();
	}

	@Test
	public void testNonInteger() throws Exception {
	try {
	Type.INTEGER.convert("foo", null);
	fail();
	} catch (Type.ConversionException e) {
	// This does not use assertMessageContainsWordsWithQuotes because at least
	// one test should test exact wording (but they all shouldn't to make
	// changing/improving the messages easy).
	assertThat(e).hasMessage("expected value of type 'int', but got \"foo\" (string)");
	}
	}

	// Ensure that types are reported correctly.
	@Test
	public void testTypeErrorMessage() throws Exception {
	try {
	Type.STRING_LIST.convert("[(1,2), 3, 4]", "myexpr", null);
	fail();
	} catch (Type.ConversionException e) {
	assertThat(e).hasMessage("expected value of type 'list(string)' for myexpr, "
	+ "but got \"[(1,2), 3, 4]\" (string)");
	}
	}

	@Test
	public void testString() throws Exception {
	Object s = "foo";
	assertThat(Type.STRING.convert(s, null)).isEqualTo(s);
	assertThat(collectLabels(Type.STRING, s)).isEmpty();
	}

	@Test
	public void testNonString() throws Exception {
	try {
	Type.STRING.convert(3, null);
	fail();
	} catch (Type.ConversionException e) {
	assertThat(e).hasMessage("expected value of type 'string', but got 3 (int)");
	}
	}

	@Test
	public void testBoolean() throws Exception {
	Object myTrue = true;
	Object myFalse = false;
	assertThat(Type.BOOLEAN.convert(1, null)).isEqualTo(Boolean.TRUE);
	assertThat(Type.BOOLEAN.convert(0, null)).isEqualTo(Boolean.FALSE);
	assertThat(Type.BOOLEAN.convert(true, null)).isTrue();
	assertThat(Type.BOOLEAN.convert(myTrue, null)).isTrue();
	assertThat(Type.BOOLEAN.convert(false, null)).isFalse();
	assertThat(Type.BOOLEAN.convert(myFalse, null)).isFalse();
	assertThat(collectLabels(Type.BOOLEAN, myTrue)).isEmpty();
	}

	@Test
	public void testNonBoolean() throws Exception {
	try {
	Type.BOOLEAN.convert("unexpected", null);
	fail();
	} catch (Type.ConversionException e) {
	assertThat(e).hasMessage(
	"expected value of type 'int', but got \"unexpected\" (string)");
	}
	// Integers other than [0, 1] should fail.
	try {
	Type.BOOLEAN.convert(2, null);
	fail();
	} catch (Type.ConversionException e) {
	assertThat(e).hasMessageThat().isEqualTo("boolean is not one of [0, 1]");
	}
	try {
	Type.BOOLEAN.convert(-1, null);
	fail();
	} catch (Type.ConversionException e) {
	assertThat(e).hasMessageThat().isEqualTo("boolean is not one of [0, 1]");
	}
	}

	@Test
	public void testTriState() throws Exception {
	assertThat(BuildType.TRISTATE.convert(1, null)).isEqualTo(TriState.YES);
	assertThat(BuildType.TRISTATE.convert(0, null)).isEqualTo(TriState.NO);
	assertThat(BuildType.TRISTATE.convert(-1, null)).isEqualTo(TriState.AUTO);
	assertThat(BuildType.TRISTATE.convert(true, null)).isEqualTo(TriState.YES);
	assertThat(BuildType.TRISTATE.convert(false, null)).isEqualTo(TriState.NO);
	assertThat(BuildType.TRISTATE.convert(TriState.YES, null)).isEqualTo(TriState.YES);
	assertThat(BuildType.TRISTATE.convert(TriState.NO, null)).isEqualTo(TriState.NO);
	assertThat(BuildType.TRISTATE.convert(TriState.AUTO, null)).isEqualTo(TriState.AUTO);
	assertThat(collectLabels(BuildType.TRISTATE, TriState.YES)).isEmpty();
	}

	@Test
	public void testTriStateDoesNotAcceptArbitraryIntegers() throws Exception {
	List<Integer> listOfCases = Lists.newArrayList(2, 3, -5, -2, 20);
	for (Object entry : listOfCases) {
	try {
	BuildType.TRISTATE.convert(entry, null);
	fail();
	} catch (Type.ConversionException e) {
	// Expected.
	}
	}
	}

	@Test
	public void testTriStateDoesNotAcceptStrings() throws Exception {
	List<String> listOfCases = Lists.newArrayList("bad", "true", "auto", "false");
	for (Object entry : listOfCases) {
	try {
	BuildType.TRISTATE.convert(entry, null);
	fail();
	} catch (Type.ConversionException e) {
	// Expected.
	}
	}
	}

	@Test
	public void testTagConversion() throws Exception {
	assertThat(Type.BOOLEAN.toTagSet(true, "attribute"))
	.containsExactlyElementsIn(Sets.newHashSet("attribute"));
	assertThat(Type.BOOLEAN.toTagSet(false, "attribute"))
	.containsExactlyElementsIn(Sets.newHashSet("noattribute"));

	assertThat(Type.STRING.toTagSet("whiskey", "preferred_cocktail"))
	.containsExactlyElementsIn(Sets.newHashSet("whiskey"));

	assertThat(
	Type.STRING_LIST.toTagSet(
	Lists.newArrayList("cheddar", "ementaler", "gruyere"), "cheeses"))
	.containsExactlyElementsIn(Sets.newHashSet("cheddar", "ementaler", "gruyere"));
	}

	@Test
	public void testIllegalTagConversionByType() throws Exception {
	try {
	BuildType.TRISTATE.toTagSet(TriState.AUTO, "some_tristate");
	fail("Expect UnsuportedOperationException");
	} catch (UnsupportedOperationException e) {
	// Success.
	}
	try {
	BuildType.LICENSE.toTagSet(License.NO_LICENSE, "output_license");
	fail("Expect UnsuportedOperationException");
	} catch (UnsupportedOperationException e) {
	// Success.
	}
	}

	@Test
	public void testIllegalTagConversIonFromNullOnSupportedType() throws Exception {
	try {
	Type.BOOLEAN.toTagSet(null, "a_boolean");
	fail("Expect UnsuportedOperationException");
	} catch (IllegalStateException e) {
	// Success.
	}
	}

	@Test
	public void testLabel() throws Exception {
	Label label = Label.parseAbsolute("//foo:bar", ImmutableMap.of());
	assertThat(BuildType.LABEL.convert("//foo:bar", null, currentRule)).isEqualTo(label);
	assertThat(collectLabels(BuildType.LABEL, label)).containsExactly(label);
	}

	@Test
	public void testNodepLabel() throws Exception {
	Label label = Label.parseAbsolute("//foo:bar", ImmutableMap.of());
	assertThat(BuildType.NODEP_LABEL.convert("//foo:bar", null, currentRule)).isEqualTo(label);
	assertThat(collectLabels(BuildType.NODEP_LABEL, label)).containsExactly(label);
	}

	@Test
	public void testRelativeLabel() throws Exception {
	assertThat(BuildType.LABEL.convert(":wiz", null, currentRule))
	.isEqualTo(Label.parseAbsolute("//quux:wiz", ImmutableMap.of()));
	assertThat(BuildType.LABEL.convert("wiz", null, currentRule))
	.isEqualTo(Label.parseAbsolute("//quux:wiz", ImmutableMap.of()));
	try {
	BuildType.LABEL.convert("wiz", null);
	fail();
	} catch (ConversionException e) {
	/* ok */
	}
	}

	@Test
	public void testInvalidLabel() throws Exception {
	try {
	BuildType.LABEL.convert("not//a label", null, currentRule);
	fail();
	} catch (Type.ConversionException e) {
	MoreAsserts.assertContainsWordsWithQuotes(e.getMessage(), "not//a label");
	}
	}

	@Test
	public void testNonLabel() throws Exception {
	try {
	BuildType.LABEL.convert(3, null);
	fail();
	} catch (Type.ConversionException e) {
	assertThat(e).hasMessage("expected value of type 'string', but got 3 (int)");
	}
	}

	@Test
	public void testStringList() throws Exception {
	Object input = Arrays.asList("foo", "bar", "wiz");
	List<String> converted =
	Type.STRING_LIST.convert(input, null);
	assertThat(converted).isEqualTo(input);
	assertThat(converted).isNotSameAs(input);
	assertThat(collectLabels(Type.STRING_LIST, input)).isEmpty();
	}

	@Test
	public void testStringDict() throws Exception {
	Object input = ImmutableMap.of("foo", "bar",
	"wiz", "bang");
	Map<String, String> converted = Type.STRING_DICT.convert(input, null);
	assertThat(converted).isEqualTo(input);
	assertThat(converted).isNotSameAs(input);
	assertThat(collectLabels(Type.STRING_DICT, converted)).isEmpty();
	}

	@Test
	public void testStringDictBadElements() throws Exception {
	Object input = ImmutableMap.of("foo", MutableList.of(null, "bar", "baz"), "wiz", "bang");
	try {
	Type.STRING_DICT.convert(input, null);
	fail();
	} catch (Type.ConversionException e) {
	assertThat(e).hasMessage("expected value of type 'string' for dict value element, "
	+ "but got [\"bar\", \"baz\"] (list)");
	}
	}

	@Test
	public void testNonStringList() throws Exception {
	try {
	Type.STRING_LIST.convert(3, "blah");
	fail();
	} catch (Type.ConversionException e) {
	assertThat(e).hasMessage("expected value of type 'list(string)' for blah, but got 3 (int)");
	}
	}

	@Test
	public void testStringListBadElements() throws Exception {
	Object input = Arrays.<Object>asList("foo", "bar", 1);
	try {
	Type.STRING_LIST.convert(input, "argument quux");
	fail();
	} catch (Type.ConversionException e) {
	assertThat(e).hasMessage(
	"expected value of type 'string' for element 2 of argument quux, but got 1 (int)");
	}
	}

	@Test
	public void testListDepsetConversion() throws Exception {
	Object input = SkylarkNestedSet.of(
	String.class,
	NestedSetBuilder.create(Order.STABLE_ORDER, "a", "b", "c"));
	Type.STRING_LIST.convert(input, null);
	}

	@Test
	public void testLabelList() throws Exception {
	Object input = Arrays.asList("//foo:bar", ":wiz");
	List<Label> converted =
	BuildType.LABEL_LIST.convert(input , null, currentRule);
	List<Label> expected =
	Arrays.asList(
	Label.parseAbsolute("//foo:bar", ImmutableMap.of()),
	Label.parseAbsolute("//quux:wiz", ImmutableMap.of()));
	assertThat(converted).isEqualTo(expected);
	assertThat(converted).isNotSameAs(expected);
	assertThat(collectLabels(BuildType.LABEL_LIST, converted)).containsExactlyElementsIn(expected);
	}

	@Test
	public void testNonLabelList() throws Exception {
	try {
	BuildType.LABEL_LIST.convert(3, "foo", currentRule);
	fail();
	} catch (Type.ConversionException e) {
	assertThat(e).hasMessage("expected value of type 'list(label)' for foo, but got 3 (int)");
	}
	}

	@Test
	public void testLabelListBadElements() throws Exception {
	Object list = Arrays.<Object>asList("//foo:bar", 2, "foo");
	try {
	BuildType.LABEL_LIST.convert(list, null, currentRule);
	fail();
	} catch (Type.ConversionException e) {
	assertThat(e).hasMessage(
	"expected value of type 'string' for element 1 of null, but got 2 (int)");
	}
	}

	@Test
	public void testLabelListSyntaxError() throws Exception {
	Object list = Arrays.<Object>asList("//foo:bar/..", "foo");
	try {
	BuildType.LABEL_LIST.convert(list, "myexpr", currentRule);
	fail();
	} catch (Type.ConversionException e) {
	assertThat(e).hasMessage("invalid label '//foo:bar/..' in element 0 of myexpr: "
	+ "invalid target name 'bar/..': "
	+ "target names may not contain up-level references '..'");
	}
	}

	@Test
	public void testStringListDict() throws Exception {
	Object input = ImmutableMap.of("foo", Arrays.asList("foo", "bar"),
	"wiz", Arrays.asList("bang"));
	Map<String, List<String>> converted =
	Type.STRING_LIST_DICT.convert(input, null, currentRule);
	Map<?, ?> expected = ImmutableMap.<String, List<String>>of(
	"foo", Arrays.asList("foo", "bar"),
	"wiz", Arrays.asList("bang"));
	assertThat(converted).isEqualTo(expected);
	assertThat(converted).isNotSameAs(expected);
	assertThat(collectLabels(Type.STRING_LIST_DICT, converted)).isEmpty();
	}

	@Test
	public void testStringListDictBadFirstElement() throws Exception {
	Object input = ImmutableMap.of(2, Arrays.asList("foo", "bar"),
	"wiz", Arrays.asList("bang"));
	try {
	Type.STRING_LIST_DICT.convert(input, null, currentRule);
	fail();
	} catch (Type.ConversionException e) {
	assertThat(e).hasMessage(
	"expected value of type 'string' for dict key element, but got 2 (int)");
	}
	}

	@Test
	public void testStringListDictBadSecondElement() throws Exception {
	Object input = ImmutableMap.of("foo", "bar",
	"wiz", Arrays.asList("bang"));
	try {
	Type.STRING_LIST_DICT.convert(input, null, currentRule);
	fail();
	} catch (Type.ConversionException e) {
	assertThat(e).hasMessage(
	"expected value of type 'list(string)' for dict value element, "
	+ "but got \"bar\" (string)");
	}
	}

	@Test
	public void testStringListDictBadElements1() throws Exception {
	Object input = ImmutableMap.of(Tuple.of("foo"), Tuple.of("bang"), "wiz", Tuple.of("bang"));
	try {
	Type.STRING_LIST_DICT.convert(input, null);
	fail();
	} catch (Type.ConversionException e) {
	assertThat(e).hasMessage("expected value of type 'string' for dict key element, but got "
	+ "(\"foo\",) (tuple)");
	}
	}

	@Test
	public void testStringDictThrowsConversionException() throws Exception {
	try {
	Type.STRING_DICT.convert("some string", null);
	fail();
	} catch (ConversionException e) {
	assertThat(e).hasMessage(
	"expected value of type 'dict(string, string)', but got \"some string\" (string)");
	}
	}

	private static ImmutableList<Label> collectLabels(Type<?> type, Object value) {
	final ImmutableList.Builder<Label> result = ImmutableList.builder();
	type.visitLabels((label, dummy) -> result.add(label), value, /context=/ null);
	return result.build();
	}
	}