compose/ui/ui-text/src/test/java/androidx/compose/ui/text/input/DeleteSurroundingTextCommandTest.kt - platform/frameworks/support - Git at Google

 /*
  * Copyright 2019 The Android Open Source Project
  *
  * 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 androidx.compose.ui.text.input

 import androidx.compose.ui.text.TextRange
 import com.google.common.truth.Truth.assertThat
 import kotlin.test.assertFailsWith
 import org.junit.Test
 import org.junit.runner.RunWith
 import org.junit.runners.JUnit4

 @RunWith(JUnit4::class)
 class DeleteSurroundingTextCommandTest {

  @Test
  fun test_delete_after() {
  val eb = EditingBuffer("ABCDE", TextRange(1))

  DeleteSurroundingTextCommand(0, 1).applyTo(eb)

  assertThat(eb.toString()).isEqualTo("ACDE")
  assertThat(eb.cursor).isEqualTo(1)
  assertThat(eb.hasComposition()).isFalse()
  }

  @Test
  fun test_delete_before() {
  val eb = EditingBuffer("ABCDE", TextRange(1))

  DeleteSurroundingTextCommand(1, 0).applyTo(eb)

  assertThat(eb.toString()).isEqualTo("BCDE")
  assertThat(eb.cursor).isEqualTo(0)
  assertThat(eb.hasComposition()).isFalse()
  }

  @Test
  fun test_delete_both() {
  val eb = EditingBuffer("ABCDE", TextRange(3))

  DeleteSurroundingTextCommand(1, 1).applyTo(eb)

  assertThat(eb.toString()).isEqualTo("ABE")
  assertThat(eb.cursor).isEqualTo(2)
  assertThat(eb.hasComposition()).isFalse()
  }

  @Test
  fun test_delete_after_multiple() {
  val eb = EditingBuffer("ABCDE", TextRange(2))

  DeleteSurroundingTextCommand(0, 2).applyTo(eb)

  assertThat(eb.toString()).isEqualTo("ABE")
  assertThat(eb.cursor).isEqualTo(2)
  assertThat(eb.hasComposition()).isFalse()
  }

  @Test
  fun test_delete_before_multiple() {
  val eb = EditingBuffer("ABCDE", TextRange(3))

  DeleteSurroundingTextCommand(2, 0).applyTo(eb)

  assertThat(eb.toString()).isEqualTo("ADE")
  assertThat(eb.cursor).isEqualTo(1)
  assertThat(eb.hasComposition()).isFalse()
  }

  @Test
  fun test_delete_both_multiple() {
  val eb = EditingBuffer("ABCDE", TextRange(3))

  DeleteSurroundingTextCommand(2, 2).applyTo(eb)

  assertThat(eb.toString()).isEqualTo("A")
  assertThat(eb.cursor).isEqualTo(1)
  assertThat(eb.hasComposition()).isFalse()
  }

  @Test
  fun test_delete_selection_preserve() {
  val eb = EditingBuffer("ABCDE", TextRange(2, 4))

  DeleteSurroundingTextCommand(1, 1).applyTo(eb)

  assertThat(eb.toString()).isEqualTo("ACD")
  assertThat(eb.selectionStart).isEqualTo(1)
  assertThat(eb.selectionEnd).isEqualTo(3)
  assertThat(eb.hasComposition()).isFalse()
  }

  @Test
  fun test_delete_before_too_many() {
  val eb = EditingBuffer("ABCDE", TextRange(3))

  DeleteSurroundingTextCommand(1000, 0).applyTo(eb)

  assertThat(eb.toString()).isEqualTo("DE")
  assertThat(eb.cursor).isEqualTo(0)
  assertThat(eb.hasComposition()).isFalse()
  }

  @Test
  fun test_delete_after_too_many() {
  val eb = EditingBuffer("ABCDE", TextRange(3))

  DeleteSurroundingTextCommand(0, 1000).applyTo(eb)

  assertThat(eb.toString()).isEqualTo("ABC")
  assertThat(eb.cursor).isEqualTo(3)
  assertThat(eb.hasComposition()).isFalse()
  }

  @Test
  fun test_delete_both_too_many() {
  val eb = EditingBuffer("ABCDE", TextRange(3))

  DeleteSurroundingTextCommand(1000, 1000).applyTo(eb)

  assertThat(eb.toString()).isEqualTo("")
  assertThat(eb.cursor).isEqualTo(0)
  assertThat(eb.hasComposition()).isFalse()
  }

  @Test
  fun test_delete_composition_no_intersection_preceding_composition() {
  val eb = EditingBuffer("ABCDE", TextRange(3))

  eb.setComposition(0, 1)

  DeleteSurroundingTextCommand(1, 1).applyTo(eb)

  assertThat(eb.toString()).isEqualTo("ABE")
  assertThat(eb.cursor).isEqualTo(2)
  assertThat(eb.compositionStart).isEqualTo(0)
  assertThat(eb.compositionEnd).isEqualTo(1)
  }

  @Test
  fun test_delete_composition_no_intersection_trailing_composition() {
  val eb = EditingBuffer("ABCDE", TextRange(3))

  eb.setComposition(4, 5)

  DeleteSurroundingTextCommand(1, 1).applyTo(eb)

  assertThat(eb.toString()).isEqualTo("ABE")
  assertThat(eb.cursor).isEqualTo(2)
  assertThat(eb.compositionStart).isEqualTo(2)
  assertThat(eb.compositionEnd).isEqualTo(3)
  }

  @Test
  fun test_delete_composition_intersection_preceding_composition() {
  val eb = EditingBuffer("ABCDE", TextRange(3))

  eb.setComposition(0, 3)

  DeleteSurroundingTextCommand(1, 1).applyTo(eb)

  assertThat(eb.toString()).isEqualTo("ABE")
  assertThat(eb.cursor).isEqualTo(2)
  assertThat(eb.compositionStart).isEqualTo(0)
  assertThat(eb.compositionEnd).isEqualTo(2)
  }

  @Test
  fun test_delete_composition_intersection_trailing_composition() {
  val eb = EditingBuffer("ABCDE", TextRange(3))

  eb.setComposition(3, 5)

  DeleteSurroundingTextCommand(1, 1).applyTo(eb)

  assertThat(eb.toString()).isEqualTo("ABE")
  assertThat(eb.cursor).isEqualTo(2)
  assertThat(eb.compositionStart).isEqualTo(2)
  assertThat(eb.compositionEnd).isEqualTo(3)
  }

  @Test
  fun test_delete_covered_composition() {
  val eb = EditingBuffer("ABCDE", TextRange(3))

  eb.setComposition(2, 3)

  DeleteSurroundingTextCommand(1, 1).applyTo(eb)

  assertThat(eb.toString()).isEqualTo("ABE")
  assertThat(eb.cursor).isEqualTo(2)
  assertThat(eb.hasComposition()).isFalse()
  }

  @Test
  fun test_delete_composition_covered() {
  val eb = EditingBuffer("ABCDE", TextRange(3))

  eb.setComposition(0, 5)

  DeleteSurroundingTextCommand(1, 1).applyTo(eb)

  assertThat(eb.toString()).isEqualTo("ABE")
  assertThat(eb.cursor).isEqualTo(2)
  assertThat(eb.compositionStart).isEqualTo(0)
  assertThat(eb.compositionEnd).isEqualTo(3)
  }

  @Test
  fun throws_whenLengthBeforeInvalid() {
  val error = assertFailsWith<IllegalArgumentException> {
  DeleteSurroundingTextCommand(lengthBeforeCursor = -42, lengthAfterCursor = 0)
  }
  assertThat(error).hasMessageThat().contains("-42")
  }

  @Test
  fun throws_whenLengthAfterInvalid() {
  val error = assertFailsWith<IllegalArgumentException> {
  DeleteSurroundingTextCommand(lengthBeforeCursor = 0, lengthAfterCursor = -42)
  }
  assertThat(error).hasMessageThat().contains("-42")
  }

  @Test
  fun deletes_whenLengthAfterCursorOverflows_withMaxValue() {
  val text = "abcde"
  val textAfterDelete = "abcd"
  val selection = TextRange(textAfterDelete.length)
  val eb = EditingBuffer(text, selection)

  DeleteSurroundingTextCommand(
  lengthBeforeCursor = 0,
  lengthAfterCursor = Int.MAX_VALUE
  ).applyTo(eb)

  assertThat(eb.toString()).isEqualTo(textAfterDelete)
  assertThat(eb.cursor).isEqualTo(textAfterDelete.length)
  }

  @Test
  fun deletes_whenLengthBeforeCursorOverflows_withMaxValue() {
  val text = "abcde"
  val selection = TextRange(1)
  val eb = EditingBuffer(text, selection)

  DeleteSurroundingTextCommand(
  lengthBeforeCursor = Int.MAX_VALUE,
  lengthAfterCursor = 0
  ).applyTo(eb)

  assertThat(eb.toString()).isEqualTo("bcde")
  assertThat(eb.cursor).isEqualTo(0)
  }

  @Test
  fun deletes_whenLengthAfterCursorOverflows() {
  val text = "abcde"
  val textAfterDelete = "abcd"
  val selection = TextRange(textAfterDelete.length)
  val eb = EditingBuffer(text, selection)

  DeleteSurroundingTextCommand(
  lengthBeforeCursor = 0,
  lengthAfterCursor = Int.MAX_VALUE - 1
  ).applyTo(eb)

  assertThat(eb.toString()).isEqualTo(textAfterDelete)
  assertThat(eb.cursor).isEqualTo(textAfterDelete.length)
  }

  @Test
  fun deletes_whenLengthBeforeCursorOverflows() {
  val text = "abcde"
  val selection = TextRange(1)
  val eb = EditingBuffer(text, selection)

  DeleteSurroundingTextCommand(
  lengthBeforeCursor = Int.MAX_VALUE - 1,
  lengthAfterCursor = 0
  ).applyTo(eb)

  assertThat(eb.toString()).isEqualTo("bcde")
  assertThat(eb.cursor).isEqualTo(0)
  }
 }
	/*
	* Copyright 2019 The Android Open Source Project
	*
	* 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 androidx.compose.ui.text.input

	import androidx.compose.ui.text.TextRange
	import com.google.common.truth.Truth.assertThat
	import kotlin.test.assertFailsWith
	import org.junit.Test
	import org.junit.runner.RunWith
	import org.junit.runners.JUnit4

	@RunWith(JUnit4::class)
	class DeleteSurroundingTextCommandTest {

	@Test
	fun test_delete_after() {
	val eb = EditingBuffer("ABCDE", TextRange(1))

	DeleteSurroundingTextCommand(0, 1).applyTo(eb)

	assertThat(eb.toString()).isEqualTo("ACDE")
	assertThat(eb.cursor).isEqualTo(1)
	assertThat(eb.hasComposition()).isFalse()
	}

	@Test
	fun test_delete_before() {
	val eb = EditingBuffer("ABCDE", TextRange(1))

	DeleteSurroundingTextCommand(1, 0).applyTo(eb)

	assertThat(eb.toString()).isEqualTo("BCDE")
	assertThat(eb.cursor).isEqualTo(0)
	assertThat(eb.hasComposition()).isFalse()
	}

	@Test
	fun test_delete_both() {
	val eb = EditingBuffer("ABCDE", TextRange(3))

	DeleteSurroundingTextCommand(1, 1).applyTo(eb)

	assertThat(eb.toString()).isEqualTo("ABE")
	assertThat(eb.cursor).isEqualTo(2)
	assertThat(eb.hasComposition()).isFalse()
	}

	@Test
	fun test_delete_after_multiple() {
	val eb = EditingBuffer("ABCDE", TextRange(2))

	DeleteSurroundingTextCommand(0, 2).applyTo(eb)

	assertThat(eb.toString()).isEqualTo("ABE")
	assertThat(eb.cursor).isEqualTo(2)
	assertThat(eb.hasComposition()).isFalse()
	}

	@Test
	fun test_delete_before_multiple() {
	val eb = EditingBuffer("ABCDE", TextRange(3))

	DeleteSurroundingTextCommand(2, 0).applyTo(eb)

	assertThat(eb.toString()).isEqualTo("ADE")
	assertThat(eb.cursor).isEqualTo(1)
	assertThat(eb.hasComposition()).isFalse()
	}

	@Test
	fun test_delete_both_multiple() {
	val eb = EditingBuffer("ABCDE", TextRange(3))

	DeleteSurroundingTextCommand(2, 2).applyTo(eb)

	assertThat(eb.toString()).isEqualTo("A")
	assertThat(eb.cursor).isEqualTo(1)
	assertThat(eb.hasComposition()).isFalse()
	}

	@Test
	fun test_delete_selection_preserve() {
	val eb = EditingBuffer("ABCDE", TextRange(2, 4))

	DeleteSurroundingTextCommand(1, 1).applyTo(eb)

	assertThat(eb.toString()).isEqualTo("ACD")
	assertThat(eb.selectionStart).isEqualTo(1)
	assertThat(eb.selectionEnd).isEqualTo(3)
	assertThat(eb.hasComposition()).isFalse()
	}

	@Test
	fun test_delete_before_too_many() {
	val eb = EditingBuffer("ABCDE", TextRange(3))

	DeleteSurroundingTextCommand(1000, 0).applyTo(eb)

	assertThat(eb.toString()).isEqualTo("DE")
	assertThat(eb.cursor).isEqualTo(0)
	assertThat(eb.hasComposition()).isFalse()
	}

	@Test
	fun test_delete_after_too_many() {
	val eb = EditingBuffer("ABCDE", TextRange(3))

	DeleteSurroundingTextCommand(0, 1000).applyTo(eb)

	assertThat(eb.toString()).isEqualTo("ABC")
	assertThat(eb.cursor).isEqualTo(3)
	assertThat(eb.hasComposition()).isFalse()
	}

	@Test
	fun test_delete_both_too_many() {
	val eb = EditingBuffer("ABCDE", TextRange(3))

	DeleteSurroundingTextCommand(1000, 1000).applyTo(eb)

	assertThat(eb.toString()).isEqualTo("")
	assertThat(eb.cursor).isEqualTo(0)
	assertThat(eb.hasComposition()).isFalse()
	}

	@Test
	fun test_delete_composition_no_intersection_preceding_composition() {
	val eb = EditingBuffer("ABCDE", TextRange(3))

	eb.setComposition(0, 1)

	DeleteSurroundingTextCommand(1, 1).applyTo(eb)

	assertThat(eb.toString()).isEqualTo("ABE")
	assertThat(eb.cursor).isEqualTo(2)
	assertThat(eb.compositionStart).isEqualTo(0)
	assertThat(eb.compositionEnd).isEqualTo(1)
	}

	@Test
	fun test_delete_composition_no_intersection_trailing_composition() {
	val eb = EditingBuffer("ABCDE", TextRange(3))

	eb.setComposition(4, 5)

	DeleteSurroundingTextCommand(1, 1).applyTo(eb)

	assertThat(eb.toString()).isEqualTo("ABE")
	assertThat(eb.cursor).isEqualTo(2)
	assertThat(eb.compositionStart).isEqualTo(2)
	assertThat(eb.compositionEnd).isEqualTo(3)
	}

	@Test
	fun test_delete_composition_intersection_preceding_composition() {
	val eb = EditingBuffer("ABCDE", TextRange(3))

	eb.setComposition(0, 3)

	DeleteSurroundingTextCommand(1, 1).applyTo(eb)

	assertThat(eb.toString()).isEqualTo("ABE")
	assertThat(eb.cursor).isEqualTo(2)
	assertThat(eb.compositionStart).isEqualTo(0)
	assertThat(eb.compositionEnd).isEqualTo(2)
	}

	@Test
	fun test_delete_composition_intersection_trailing_composition() {
	val eb = EditingBuffer("ABCDE", TextRange(3))

	eb.setComposition(3, 5)

	DeleteSurroundingTextCommand(1, 1).applyTo(eb)

	assertThat(eb.toString()).isEqualTo("ABE")
	assertThat(eb.cursor).isEqualTo(2)
	assertThat(eb.compositionStart).isEqualTo(2)
	assertThat(eb.compositionEnd).isEqualTo(3)
	}

	@Test
	fun test_delete_covered_composition() {
	val eb = EditingBuffer("ABCDE", TextRange(3))

	eb.setComposition(2, 3)

	DeleteSurroundingTextCommand(1, 1).applyTo(eb)

	assertThat(eb.toString()).isEqualTo("ABE")
	assertThat(eb.cursor).isEqualTo(2)
	assertThat(eb.hasComposition()).isFalse()
	}

	@Test
	fun test_delete_composition_covered() {
	val eb = EditingBuffer("ABCDE", TextRange(3))

	eb.setComposition(0, 5)

	DeleteSurroundingTextCommand(1, 1).applyTo(eb)

	assertThat(eb.toString()).isEqualTo("ABE")
	assertThat(eb.cursor).isEqualTo(2)
	assertThat(eb.compositionStart).isEqualTo(0)
	assertThat(eb.compositionEnd).isEqualTo(3)
	}

	@Test
	fun throws_whenLengthBeforeInvalid() {
	val error = assertFailsWith<IllegalArgumentException> {
	DeleteSurroundingTextCommand(lengthBeforeCursor = -42, lengthAfterCursor = 0)
	}
	assertThat(error).hasMessageThat().contains("-42")
	}

	@Test
	fun throws_whenLengthAfterInvalid() {
	val error = assertFailsWith<IllegalArgumentException> {
	DeleteSurroundingTextCommand(lengthBeforeCursor = 0, lengthAfterCursor = -42)
	}
	assertThat(error).hasMessageThat().contains("-42")
	}

	@Test
	fun deletes_whenLengthAfterCursorOverflows_withMaxValue() {
	val text = "abcde"
	val textAfterDelete = "abcd"
	val selection = TextRange(textAfterDelete.length)
	val eb = EditingBuffer(text, selection)

	DeleteSurroundingTextCommand(
	lengthBeforeCursor = 0,
	lengthAfterCursor = Int.MAX_VALUE
	).applyTo(eb)

	assertThat(eb.toString()).isEqualTo(textAfterDelete)
	assertThat(eb.cursor).isEqualTo(textAfterDelete.length)
	}

	@Test
	fun deletes_whenLengthBeforeCursorOverflows_withMaxValue() {
	val text = "abcde"
	val selection = TextRange(1)
	val eb = EditingBuffer(text, selection)

	DeleteSurroundingTextCommand(
	lengthBeforeCursor = Int.MAX_VALUE,
	lengthAfterCursor = 0
	).applyTo(eb)

	assertThat(eb.toString()).isEqualTo("bcde")
	assertThat(eb.cursor).isEqualTo(0)
	}

	@Test
	fun deletes_whenLengthAfterCursorOverflows() {
	val text = "abcde"
	val textAfterDelete = "abcd"
	val selection = TextRange(textAfterDelete.length)
	val eb = EditingBuffer(text, selection)

	DeleteSurroundingTextCommand(
	lengthBeforeCursor = 0,
	lengthAfterCursor = Int.MAX_VALUE - 1
	).applyTo(eb)

	assertThat(eb.toString()).isEqualTo(textAfterDelete)
	assertThat(eb.cursor).isEqualTo(textAfterDelete.length)
	}

	@Test
	fun deletes_whenLengthBeforeCursorOverflows() {
	val text = "abcde"
	val selection = TextRange(1)
	val eb = EditingBuffer(text, selection)

	DeleteSurroundingTextCommand(
	lengthBeforeCursor = Int.MAX_VALUE - 1,
	lengthAfterCursor = 0
	).applyTo(eb)

	assertThat(eb.toString()).isEqualTo("bcde")
	assertThat(eb.cursor).isEqualTo(0)
	}
	}