| /* |
| * 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.ui.text |
| |
| import com.google.common.truth.Truth.assertThat |
| import org.junit.Test |
| import org.junit.runner.RunWith |
| import org.junit.runners.JUnit4 |
| |
| @OptIn(InternalTextApi::class) |
| @RunWith(JUnit4::class) |
| class TextRangeTest { |
| @Test |
| fun substring() { |
| val text = "abcdef" |
| assertThat(text.substring(TextRange(0, 3))).isEqualTo(text.substring(0, 3)) |
| } |
| |
| @Test |
| fun substring_not_start_larger_than_end() { |
| val text = "abcdef" |
| assertThat(text.substring(TextRange(3, 0))).isEqualTo(text.substring(0, 3)) |
| } |
| |
| @Test |
| fun min_max() { |
| val textRange = TextRange(9, 8) |
| assertThat(textRange.min).isEqualTo(8) |
| assertThat(textRange.max).isEqualTo(9) |
| } |
| |
| @Test |
| fun equality() { |
| assertThat(TextRange(0, 0)).isEqualTo(TextRange(0, 0)) |
| assertThat(TextRange(0, 1)).isEqualTo(TextRange(0, 1)) |
| |
| assertThat(TextRange(0, 1)).isNotEqualTo(TextRange(0, 0)) |
| } |
| |
| @Test |
| fun test_range_collapsed() { |
| assertThat(TextRange(0, 0).collapsed).isTrue() |
| assertThat(TextRange(1, 1).collapsed).isTrue() |
| |
| assertThat(TextRange(0, 1).collapsed).isFalse() |
| assertThat(TextRange(1, 2).collapsed).isFalse() |
| } |
| |
| @Test |
| fun test_intersects() { |
| // same values intersect |
| assertThat(TextRange(0, 1).intersects(TextRange(0, 1))).isTrue() |
| // first one covers second one |
| assertThat(TextRange(0, 2).intersects(TextRange(1, 2))).isTrue() |
| // first one covers second one |
| assertThat(TextRange(0, 2).intersects(TextRange(0, 1))).isTrue() |
| // second one covers first one |
| assertThat(TextRange(0, 1).intersects(TextRange(0, 2))).isTrue() |
| // regular intersection |
| assertThat(TextRange(0, 3).intersects(TextRange(1, 4))).isTrue() |
| // opposite of regular intersection |
| assertThat(TextRange(1, 4).intersects(TextRange(0, 3))).isTrue() |
| |
| assertThat(TextRange(0, 1).intersects(TextRange(1, 2))).isFalse() |
| assertThat(TextRange(0, 1).intersects(TextRange(2, 3))).isFalse() |
| assertThat(TextRange(1, 2).intersects(TextRange(0, 1))).isFalse() |
| assertThat(TextRange(2, 3).intersects(TextRange(0, 1))).isFalse() |
| } |
| |
| @Test |
| fun test_contains_range() { |
| assertThat(TextRange(0, 2).contains(TextRange(0, 1))).isTrue() |
| assertThat(TextRange(0, 2).contains(TextRange(0, 2))).isTrue() |
| |
| assertThat(TextRange(0, 2).contains(TextRange(0, 3))).isFalse() |
| assertThat(TextRange(0, 2).contains(TextRange(1, 3))).isFalse() |
| } |
| |
| @Test |
| fun test_contains_range_operator() { |
| assertThat(TextRange(0, 1) in TextRange(0, 2)).isTrue() |
| assertThat(TextRange(0, 2) in TextRange(0, 2)).isTrue() |
| |
| assertThat(TextRange(0, 3) in TextRange(0, 2)).isFalse() |
| assertThat(TextRange(1, 3) in TextRange(0, 2)).isFalse() |
| } |
| |
| @Test |
| fun test_contains_offset() { |
| assertThat(TextRange(0, 2).contains(0)).isTrue() |
| assertThat(TextRange(0, 2).contains(1)).isTrue() |
| |
| // end is exclusive therefore won't contain |
| assertThat(TextRange(0, 2).contains(2)).isFalse() |
| assertThat(TextRange(0, 2).contains(3)).isFalse() |
| } |
| |
| @Test |
| fun test_contains_offset_operator() { |
| assertThat(0 in TextRange(0, 2)).isTrue() |
| assertThat(1 in TextRange(0, 2)).isTrue() |
| |
| // end is exclusive therefore won't contain |
| assertThat(2 in TextRange(0, 2)).isFalse() |
| assertThat(3 in TextRange(0, 2)).isFalse() |
| } |
| |
| @Test(expected = IllegalArgumentException::class) |
| fun test_does_not_accept_negative_value_for_start() { |
| TextRange(-1, 1) |
| } |
| |
| @Test(expected = IllegalArgumentException::class) |
| fun test_does_not_accept_negative_value_for_end() { |
| TextRange(1, -1) |
| } |
| |
| @Test |
| fun constrain_returns_same_object_if_no_change_required() { |
| val textRange = TextRange(1, 2) |
| assertThat(textRange.constrain(0, 3)).isSameInstanceAs(textRange) |
| } |
| |
| @Test |
| fun constrain_updates_start_end_if_required() { |
| assertThat(TextRange(0, 4).constrain(1, 3)).isEqualTo(TextRange(1, 3)) |
| } |
| |
| @Test |
| fun constrain_collapsed_TextRange_with_the_same_min_max_returns_the_same_instance() { |
| val textRange = TextRange(2, 2) |
| assertThat(textRange.constrain(2, 2)).isSameInstanceAs(textRange) |
| } |
| |
| @Test |
| fun constrain_with_collapsed_min_max_returns_collapsed_values() { |
| assertThat(TextRange(1, 2).constrain(2, 2)).isEqualTo(TextRange(2, 2)) |
| assertThat(TextRange(2, 3).constrain(2, 2)).isEqualTo(TextRange(2, 2)) |
| } |
| |
| @Test |
| fun constrain_min_max_greater_than_TextRange_values() { |
| assertThat(TextRange(0, 4).constrain(5, 6)).isEqualTo(TextRange(5, 5)) |
| } |
| |
| @Test |
| fun constrain_min_smaller_than_TextRange_values() { |
| assertThat(TextRange(5, 6).constrain(0, 4)).isEqualTo(TextRange(4, 4)) |
| } |
| } |
