| /* |
| * 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.test.filters.SdkSuppress |
| import androidx.test.filters.SmallTest |
| import androidx.compose.ui.text.TextRange |
| import org.junit.Assert.assertEquals |
| import org.junit.Assert.assertFalse |
| import org.junit.Test |
| import org.junit.runner.RunWith |
| import org.junit.runners.JUnit4 |
| |
| @SmallTest |
| @RunWith(JUnit4::class) |
| class BackspaceKeyEditOpTest { |
| |
| // Test sample surrogate pair characters. |
| private val SP1 = "\uD83D\uDE00" // U+1F600: GRINNING FACE |
| private val SP2 = "\uD83D\uDE01" // U+1F601: GRINNING FACE WITH SMILING EYES |
| private val SP3 = "\uD83D\uDE02" // U+1F602: FACE WITH TEARS OF JOY |
| private val SP4 = "\uD83D\uDE03" // U+1F603: SMILING FACE WITH OPEN MOUTH |
| private val SP5 = "\uD83D\uDE04" // U+1F604: SMILING FACE WITH OPEN MOUTH AND SMILING EYES |
| |
| // Family ZWJ Emoji: U+1F468 U+200D U+1F469 U+200D U+1F467 U+200D U+1F466 |
| private val ZWJ_EMOJI = "\uD83D\uDC68\u200D\uD83D\uDC69\u200D\uD83D\uDC67\u200D\uD83D\uDC66" |
| |
| @Test |
| fun test_delete() { |
| val eb = EditingBuffer("ABCDE", TextRange(1)) |
| |
| BackspaceKeyEditOp().process(eb) |
| |
| assertEquals("BCDE", eb.toString()) |
| assertEquals(0, eb.cursor) |
| assertFalse(eb.hasComposition()) |
| } |
| |
| @Test |
| fun test_delete_from_offset0() { |
| val eb = EditingBuffer("ABCDE", TextRange.Zero) |
| |
| BackspaceKeyEditOp().process(eb) |
| |
| assertEquals("ABCDE", eb.toString()) |
| assertEquals(0, eb.cursor) |
| assertFalse(eb.hasComposition()) |
| } |
| |
| @Test |
| fun test_delete_with_selection() { |
| val eb = EditingBuffer("ABCDE", TextRange(2, 3)) |
| |
| BackspaceKeyEditOp().process(eb) |
| |
| assertEquals("ABDE", eb.toString()) |
| assertEquals(2, eb.cursor) |
| assertFalse(eb.hasComposition()) |
| } |
| |
| @Test |
| fun test_delete_with_composition() { |
| val eb = EditingBuffer("ABCDE", TextRange(1)) |
| eb.setComposition(2, 3) |
| |
| BackspaceKeyEditOp().process(eb) |
| |
| assertEquals("ABDE", eb.toString()) |
| assertEquals(1, eb.cursor) |
| assertFalse(eb.hasComposition()) |
| } |
| |
| @Test |
| fun test_delete_surrogate_pair() { |
| val eb = EditingBuffer("$SP1$SP2$SP3$SP4$SP5", TextRange(2)) |
| |
| BackspaceKeyEditOp().process(eb) |
| |
| assertEquals("$SP2$SP3$SP4$SP5", eb.toString()) |
| assertEquals(0, eb.cursor) |
| assertFalse(eb.hasComposition()) |
| } |
| |
| @Test |
| fun test_delete_with_selection_surrogate_pair() { |
| val eb = EditingBuffer("$SP1$SP2$SP3$SP4$SP5", TextRange(4, 6)) |
| |
| BackspaceKeyEditOp().process(eb) |
| |
| assertEquals("$SP1$SP2$SP4$SP5", eb.toString()) |
| assertEquals(4, eb.cursor) |
| assertFalse(eb.hasComposition()) |
| } |
| |
| @Test |
| fun test_delete_with_composition_surrogate_pair() { |
| val eb = EditingBuffer("$SP1$SP2$SP3$SP4$SP5", TextRange(2)) |
| eb.setComposition(4, 6) |
| |
| BackspaceKeyEditOp().process(eb) |
| |
| assertEquals("$SP1$SP2$SP4$SP5", eb.toString()) |
| assertEquals(2, eb.cursor) |
| assertFalse(eb.hasComposition()) |
| } |
| |
| @Test |
| @SdkSuppress(minSdkVersion = 26) |
| fun test_delete_with_composition_zwj_emoji() { |
| val eb = EditingBuffer( |
| "$ZWJ_EMOJI$ZWJ_EMOJI", |
| TextRange(ZWJ_EMOJI.length)) |
| |
| BackspaceKeyEditOp().process(eb) |
| |
| assertEquals(ZWJ_EMOJI, eb.toString()) |
| assertEquals(0, eb.cursor) |
| assertFalse(eb.hasComposition()) |
| } |
| } |