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/** | ||
* The MIT License (MIT) | ||
* | ||
* Copyright (c) 2017 Yegor Bugayenko | ||
* | ||
* Permission is hereby granted, free of charge, to any person obtaining a copy | ||
* of this software and associated documentation files (the "Software"), to deal | ||
* in the Software without restriction, including without limitation the rights | ||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
* copies of the Software, and to permit persons to whom the Software is | ||
* furnished to do so, subject to the following conditions: | ||
* | ||
* The above copyright notice and this permission notice shall be included | ||
* in all copies or substantial portions of the Software. | ||
* | ||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE | ||
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
* SOFTWARE. | ||
*/ | ||
package org.cactoos.text; | ||
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||
import java.io.IOException; | ||
import org.cactoos.Scalar; | ||
import org.cactoos.Text; | ||
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/** | ||
* Determines if text is blank (consists of spaces) or no. | ||
* | ||
* <p>There is no thread-safety guarantee. | ||
* | ||
* @author Andriy Kryvtsun (kontiky@gmail.com) | ||
* @version $Id$ | ||
* @since 0.1 | ||
*/ | ||
public final class IsBlank implements Scalar<Boolean> { | ||
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/** | ||
* The text. | ||
*/ | ||
private final Text origin; | ||
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/** | ||
* Ctor. | ||
* @param text The text | ||
*/ | ||
public IsBlank(final Text text) { | ||
this.origin = text; | ||
} | ||
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@Override | ||
public Boolean asValue() throws IOException { | ||
return !this.origin.asString().chars() | ||
.filter(c -> !Character.isWhitespace(c)) | ||
.findFirst() | ||
.isPresent(); | ||
} | ||
} |
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/** | ||
* The MIT License (MIT) | ||
* | ||
* Copyright (c) 2017 Yegor Bugayenko | ||
* | ||
* Permission is hereby granted, free of charge, to any person obtaining a copy | ||
* of this software and associated documentation files (the "Software"), to deal | ||
* in the Software without restriction, including without limitation the rights | ||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
* copies of the Software, and to permit persons to whom the Software is | ||
* furnished to do so, subject to the following conditions: | ||
* | ||
* The above copyright notice and this permission notice shall be included | ||
* in all copies or substantial portions of the Software. | ||
* | ||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE | ||
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
* SOFTWARE. | ||
*/ | ||
package org.cactoos.text; | ||
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import java.io.IOException; | ||
import org.hamcrest.MatcherAssert; | ||
import org.hamcrest.Matchers; | ||
import org.junit.Test; | ||
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/** | ||
* Test case for {@link IsBlank}. | ||
* @author Andriy Kryvtsun (kontiky@gmail.com) | ||
* @version $Id$ | ||
* @since 0.1 | ||
*/ | ||
public final class IsBlankTest { | ||
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/** | ||
* IsBlank can detect empty string. | ||
* @throws IOException If some problem inside | ||
*/ | ||
@Test | ||
public void determinesEmptyText() throws IOException { | ||
MatcherAssert.assertThat( | ||
new IsBlank( | ||
new StringAsText("") | ||
).asValue(), | ||
Matchers.is(Boolean.TRUE) | ||
); | ||
} | ||
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/** | ||
* IsBlank can detect blank string. | ||
* @throws IOException If some problem inside | ||
*/ | ||
@Test | ||
public void determinesBlankText() throws IOException { | ||
MatcherAssert.assertThat( | ||
new IsBlank( | ||
new StringAsText(" ") | ||
).asValue(), | ||
Matchers.is(Boolean.TRUE) | ||
); | ||
} | ||
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/** | ||
* IsBlank can detect non blank string. | ||
* @throws IOException If some problem inside | ||
*/ | ||
@Test | ||
public void determinesNotBlankText() throws IOException { | ||
MatcherAssert.assertThat( | ||
new IsBlank( | ||
new StringAsText("not empty") | ||
).asValue(), | ||
Matchers.is(Boolean.FALSE) | ||
); | ||
} | ||
} |